CN112831237A - Nano photocatalyst coating and preparation method thereof - Google Patents
Nano photocatalyst coating and preparation method thereof Download PDFInfo
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- CN112831237A CN112831237A CN202110197966.9A CN202110197966A CN112831237A CN 112831237 A CN112831237 A CN 112831237A CN 202110197966 A CN202110197966 A CN 202110197966A CN 112831237 A CN112831237 A CN 112831237A
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- 238000000576 coating method Methods 0.000 title claims abstract description 89
- 239000011248 coating agent Substances 0.000 title claims abstract description 83
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 96
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 96
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 80
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000004593 Epoxy Substances 0.000 claims abstract description 63
- 241001122767 Theaceae Species 0.000 claims abstract description 41
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 41
- 239000002025 wood fiber Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000008367 deionised water Substances 0.000 claims abstract description 29
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 29
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 29
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 239000002562 thickening agent Substances 0.000 claims abstract description 12
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 7
- 239000013530 defoamer Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 138
- 238000003756 stirring Methods 0.000 claims description 113
- 239000008187 granular material Substances 0.000 claims description 46
- 238000010438 heat treatment Methods 0.000 claims description 46
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical group OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 claims description 46
- 238000002156 mixing Methods 0.000 claims description 44
- 238000006243 chemical reaction Methods 0.000 claims description 43
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 42
- 239000003822 epoxy resin Substances 0.000 claims description 25
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 25
- 229920000647 polyepoxide Polymers 0.000 claims description 25
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 23
- 238000007710 freezing Methods 0.000 claims description 23
- 230000008014 freezing Effects 0.000 claims description 23
- 238000000227 grinding Methods 0.000 claims description 23
- 229960000969 phenyl salicylate Drugs 0.000 claims description 23
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 23
- 229920002401 polyacrylamide Polymers 0.000 claims description 23
- -1 polydimethylsiloxane Polymers 0.000 claims description 23
- 238000010992 reflux Methods 0.000 claims description 23
- 238000007873 sieving Methods 0.000 claims description 23
- 238000004321 preservation Methods 0.000 claims description 21
- 239000002904 solvent Substances 0.000 claims description 21
- 239000002518 antifoaming agent Substances 0.000 claims description 7
- 230000002745 absorbent Effects 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 4
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 230000004048 modification Effects 0.000 abstract description 10
- 238000012986 modification Methods 0.000 abstract description 10
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 238000003421 catalytic decomposition reaction Methods 0.000 abstract description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 239000000741 silica gel Substances 0.000 description 22
- 229910002027 silica gel Inorganic materials 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 12
- 238000000746 purification Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 230000001590 oxidative effect Effects 0.000 description 5
- 230000002195 synergetic effect Effects 0.000 description 5
- 150000008064 anhydrides Chemical group 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229930002875 chlorophyll Natural products 0.000 description 1
- 235000019804 chlorophyll Nutrition 0.000 description 1
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
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- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Plant Pathology (AREA)
- Catalysts (AREA)
- Paints Or Removers (AREA)
Abstract
The invention is suitable for the technical field of coatings, and provides a nano photocatalyst coating which comprises the following components in parts by weight: 30-50 parts of nano titanium dioxide, 25-45 parts of nano silicon dioxide, 35-45 parts of epoxy modified acrylic resin, 12-16 parts of tea stalk wood fiber, 0.1-0.5 part of ultraviolet absorber, 2-6 parts of dispersant, 1-5 parts of defoamer, 1-5 parts of thickener and 25-45 parts of deionized water. The invention also provides a preparation method of the nano photocatalyst coating, which is used for carrying out epoxy modification on acrylic resin, so that the adhesive force and the glossiness of the coating are greatly improved; meanwhile, the tea stalk wood fiber is added, so that the adsorption between the powder coating and the foundation and the traction and ductility of the coated surface are effectively increased, the adhesion strength of the matt powder coating is increased, the cracks of the coating are effectively prevented, and the wear resistance is enhanced; effectively avoid the coating to drop off, lock the photocatalyst medium and ensure the catalytic decomposition efficiency.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a nano photocatalyst coating and a preparation method thereof.
Background
The photocatalyst is a nano-scale metal oxide material, which can catalyze water or oxygen in the air into active groups with extremely strong oxidizing power, such as hydroxyl free radicals, superoxide anion free radicals, active oxygen and the like with extremely strong oxidizing power under the action of light, the energy of the active groups is equivalent to the high temperature of 3600K, the active groups have extremely strong oxidizing property, and the active groups are subjected to oxidation-reduction reaction after contacting with surrounding harmful gases, pollutants and bacteria. The strong oxidizing groups can strongly decompose various organic compounds and partial inorganic substances with unstable chemical bonds, can destroy cell membranes of bacteria and protein carriers for coagulating viruses, and have extremely strong functions of sterilization, deodorization, antifouling, self-cleaning and air purification, thereby achieving the functions of purifying environment and air.
The nano photocatalyst does not change chemically under illumination, but can promote chemical reaction, and the function of the nano photocatalyst is like chlorophyll in photosynthesis. Anatase type nano TiO2 is the most important photocatalyst material, when it absorbs energy in sunlight or other light sources, electrons on the particle surface are activated and escape from the original orbit, and positive holes are generated on the surface. The escaped electrons have strong reducibility, the holes have strong oxidizing property, and the both react with water vapor in the air to generate active oxygen and hydroxyl radicals. The active oxygen and the hydroxyl radical can oxidize and decompose most organic matters, pollutants, odor, bacteria and the like into harmless carbon dioxide and water.
In recent years, decoration pollution is more and more emphasized by people, and researches show that the current decoration materials can slowly release harmful substances such as aldehydes, phenols and the like. The nanometer photocatalyst coating is used as a novel high-grade interior wall coating, the green catalytic performance of a photocatalyst and the decorative performance of the coating are perfectly combined, but the existing photocatalyst coating generally has the defect of poor adhesion, and the coating is easy to fall off after long-time use, so that the effective concentration of the photocatalyst is gradually reduced, and the catalytic decomposition performance is influenced.
Disclosure of Invention
The embodiment of the invention provides a nano photocatalyst coating, aiming at carrying out epoxy modification on acrylic resin, taking an acrylic monomer as a main raw material, adding maleic anhydride to synthesize the acrylic resin with an anhydride group on a side chain, and then reacting with epoxy resin to complete the modification of the acrylic resin, thereby greatly improving the adhesive force and the glossiness of the coating; meanwhile, the tea stem wood fiber is added, and forms a porous strong-adsorbability material rich in a residual force field in the coating, so that the adsorption between the powder coating and the foundation and the traction of the coated surface are effectively increased, the adhesion strength of the matt powder coating is increased, the cracks of the coating are effectively prevented, and the wear resistance is enhanced; through the synergistic effect of the epoxy modified acrylic resin and the tea stalk wood fiber, the coating is effectively prevented from falling off, the photocatalyst medium is locked, the effective concentration of the photocatalyst medium is prevented from being gradually reduced, and the catalytic decomposition efficiency is ensured.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a nano photocatalyst coating comprises the following components in parts by weight:
30-50 parts of nano titanium dioxide, 25-45 parts of nano silicon dioxide, 35-45 parts of epoxy modified acrylic resin, 12-16 parts of tea stalk wood fiber, 0.1-0.5 part of ultraviolet absorber, 2-6 parts of dispersant, 1-5 parts of defoamer, 1-5 parts of thickener and 25-45 parts of deionized water.
Further, the ultraviolet absorbent is phenyl salicylate.
Further, the dispersing agent is polyacrylamide, the defoaming agent is polydimethylsiloxane, and the thickening agent is silica gel.
Further, the preparation method of the epoxy modified acrylic resin comprises the following steps:
1) uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device;
2) and then adding 0.5 percent by mass of maleic anhydride, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain the epoxy modified acrylic resin.
The invention also provides a preparation method of the nano photocatalyst coating, which comprises the following steps:
1) mixing nano titanium dioxide and nano silicon dioxide, adding deionized water, adding a dispersing agent, and uniformly dispersing to obtain a first mixture;
2) heating the first mixture to 105-110 ℃, adding epoxy modified acrylic resin and tea stalk wood fiber, and simultaneously refluxing and stirring for 20-30 min to obtain a second mixture;
3) adding an ultraviolet absorbent, a defoaming agent and a thickening agent into the second mixture, heating to 70-75 ℃, and stirring for reacting for 20-40 min to obtain a third mixture;
4) and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature, and sieving to obtain the nano photocatalyst coating.
Further, the stirring speed in the step 2) is 600-800 r/min.
Further, the stirring speed in the step 3) is 200-300 r/min.
Further, the grain size of the milled powder in the step 4) is 5-10 nm.
The invention has the following beneficial effects:
according to the invention, acrylic resin is subjected to epoxy modification, acrylic monomers are used as main raw materials, maleic anhydride is added to synthesize acrylic resin with an anhydride group on a side chain, and the acrylic resin reacts with epoxy resin to complete the modification of the acrylic resin, so that the adhesive force and the glossiness of the coating are greatly improved; meanwhile, the tea stem wood fiber is added, and forms a porous strong-adsorbability material rich in a residual force field in the coating, so that the adsorption between the powder coating and the foundation and the traction of the coated surface are effectively increased, the adhesion strength of the matt powder coating is increased, the cracks of the coating are effectively prevented, and the wear resistance is enhanced; through the synergistic effect of the epoxy modified acrylic resin and the tea stalk wood fiber, the coating is effectively prevented from falling off, the photocatalyst medium is locked, the effective concentration of the photocatalyst medium is prevented from being gradually reduced, and the catalytic decomposition efficiency is ensured.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Carrying out epoxy modification on acrylic resin, taking an acrylic monomer as a main raw material, adding maleic anhydride to synthesize acrylic resin with an anhydride group on a side chain, and then reacting with epoxy resin to complete the modification of the acrylic resin, so that the adhesive force and the glossiness of the coating are greatly improved;
meanwhile, the tea stem wood fiber is added, and forms a porous strong-adsorbability material rich in a residual force field in the coating, so that the adsorption between the powder coating and the foundation and the traction of the coated surface are effectively increased, the adhesion strength of the matt powder coating is increased, the cracks of the coating are effectively prevented, and the wear resistance is enhanced;
through the synergistic effect of the epoxy modified acrylic resin and the tea stalk wood fiber, the coating is effectively prevented from falling off, the photocatalyst medium is locked, the effective concentration of the photocatalyst medium is prevented from being gradually reduced, and the catalytic decomposition efficiency is ensured.
Specifically, the invention provides a nano photocatalyst coating which comprises the following components in parts by weight:
30-50 parts of nano titanium dioxide, 25-45 parts of nano silicon dioxide, 35-45 parts of epoxy modified acrylic resin, 12-16 parts of tea stalk wood fiber, 0.1-0.5 part of ultraviolet absorber, 2-6 parts of dispersant, 1-5 parts of defoamer, 1-5 parts of thickener and 25-45 parts of deionized water.
Preferably, the ultraviolet absorber is phenyl salicylate.
Preferably, the dispersing agent is polyacrylamide, the defoaming agent is polydimethylsiloxane, and the thickening agent is silica gel.
Further, the preparation method of the epoxy modified acrylic resin comprises the following steps:
1) uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device;
2) and then adding 0.5 percent by mass of maleic anhydride, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain the epoxy modified acrylic resin.
The invention also provides a preparation method of the nano photocatalyst coating, which comprises the following steps:
1) mixing nano titanium dioxide and nano silicon dioxide, adding deionized water, adding a dispersing agent, and uniformly dispersing to obtain a first mixture;
2) heating the first mixture to 105-110 ℃, adding epoxy modified acrylic resin and tea stalk wood fiber, and simultaneously refluxing and stirring for 20-30 min to obtain a second mixture;
3) adding an ultraviolet absorbent, a defoaming agent and a thickening agent into the second mixture, heating to 70-75 ℃, and stirring for reacting for 20-40 min to obtain a third mixture;
4) and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature, and sieving to obtain the nano photocatalyst coating.
Preferably, the stirring speed in the step 2) is 600-800 r/min.
Preferably, the stirring speed in the step 3) is 200-300 r/min.
Preferably, the grain size of the milled powder in the step 4) is 5-10 nm.
The technical solution and the technical effect of the present invention will be further described by specific examples.
Example 1
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 2
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 38g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 3
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 40g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 4
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 42g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 5
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 45g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 6
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 13g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 7
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 14g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 8
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 15g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 9
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 16g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 10
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 40g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 11
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 50g of nano titanium dioxide and 25g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 12
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 35g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 13
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 45g of nano silicon dioxide, then adding 25g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 14
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, adding 35g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 15
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 30g of nano titanium dioxide and 25g of nano silicon dioxide, adding 45g of deionized water, adding 2g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 35g of epoxy modified acrylic resin and 12g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.1g of phenyl salicylate, 1g of polydimethylsiloxane and 1g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 16
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 50g of nano titanium dioxide and 45g of nano silicon dioxide, then adding 45g of deionized water, adding 6g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 40g of epoxy modified acrylic resin and 14g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.5g of phenyl salicylate, 5g of polydimethylsiloxane and 5g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Example 17
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 40g of nano titanium dioxide and 35g of nano silicon dioxide, adding 35g of deionized water, adding 4g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 40g of epoxy modified acrylic resin and 14g of tea stem wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.3g of phenyl salicylate, 3g of polydimethylsiloxane and 3g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Control group
Taking a common coating on the market.
Adhesion tests were performed on the coatings prepared in examples 1 to 17 and the control group according to the standard GB/T28897-2012, and the TVOC purification efficiency was simultaneously detected, with specific results shown in table 1.
TABLE 1
From the test results in the table, it can be seen that the adhesion and TVOC purification efficiency of the coatings prepared in examples 1-17 of the present invention are greatly improved compared to the common coatings, wherein the adhesion and TVOC purification efficiency of the coating prepared in example 17 are the highest; according to the embodiments 1-5, when the amount of the epoxy modified acrylic resin is 40g, the adhesion and TVOC purification efficiency of the prepared coating are highest; according to the examples 1 and 6 to 9, when the amount of the tea stalk wood fiber is 14g, the adhesion and TVOC purification efficiency of the prepared coating are highest.
Further, the invention is based on the preparation steps of example 17, and a single factor deletion comparative experiment is performed on the epoxy modified acrylic resin and the tea stalk wood fiber, and the experimental result shows that different factors are deleted, and the adhesion and the TVOC purification efficiency of the finally prepared coating are different to a certain extent, as shown in the following comparative examples.
Comparative example 1
Mixing 40g of nano titanium dioxide and 35g of nano silicon dioxide, adding 35g of deionized water, adding 4g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 14g of tea stalk wood fiber, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.3g of phenyl salicylate, 3g of polydimethylsiloxane and 3g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Comparative example 2
Uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device; then adding maleic anhydride with the mass percent of 0.5%, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain epoxy modified acrylic resin for later use; mixing 40g of nano titanium dioxide and 35g of nano silicon dioxide, adding 35g of deionized water, adding 4g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, adding 40g of epoxy modified acrylic resin, refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.3g of phenyl salicylate, 3g of polydimethylsiloxane and 3g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Comparative example 3
Mixing 40g of nano titanium dioxide and 35g of nano silicon dioxide, adding 35g of deionized water, adding 4g of polyacrylamide, and uniformly dispersing to obtain a first mixture; heating the first mixture to 110 ℃, and simultaneously refluxing and stirring for 30min at a stirring speed of 800r/min to obtain a second mixture; adding 0.3g of phenyl salicylate, 3g of polydimethylsiloxane and 3g of silica gel into the second mixture, heating to 75 ℃, stirring for reacting for 40min at the stirring speed of 300r/min to obtain a third mixture; and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature to 5nm, and sieving to obtain the nano photocatalyst coating.
Adhesion tests are carried out on the coatings prepared in comparative examples 1-3 according to the standard GB/T28897-2012, and TVOC purification efficiency is detected, and specific results are shown in Table 2.
TABLE 2
| Numbering | Item of implementation | Adhesion (MPa) | TVOC purification efficiency (%) |
| 17 | Example 17 | 15.8 | 97.2 |
| 19 | Comparative example 1 | 12.2 | 90.5 |
| 20 | Comparative example 2 | 11.9 | 89.3 |
| 21 | Comparative example 3 | 10.2 | 84.6 |
From the comparison results of comparative examples 1 and 2 and example 12, the adhesion and TVOC cleaning efficiency of the paint in which the epoxy-modified acrylic resin or the tea stalk wood fiber was omitted were somewhat lowered.
As can be seen from the comparison of comparative example 3 with example 12, the adhesion and TVOC purifying efficiency of the paint in which the epoxy-modified acrylic resin and the tea stalk wood fiber are simultaneously omitted are remarkably reduced.
The combination of comparative examples 1, 2 and 3 shows that the adhesive force of the coating and the TVOC purification efficiency can be effectively improved by utilizing the synergistic effect of the epoxy modified acrylic resin and the tea stalk wood fiber.
In general, the acrylic resin is subjected to epoxy modification, acrylic monomers are used as main raw materials, maleic anhydride is added to synthesize the acrylic resin with the side chain having an anhydride group, and the acrylic resin reacts with the epoxy resin to complete the modification of the acrylic resin, so that the adhesive force and the glossiness of the coating are greatly improved; meanwhile, the tea stem wood fiber is added, and forms a porous strong-adsorbability material rich in a residual force field in the coating, so that the adsorption between the powder coating and the foundation and the traction of the coated surface are effectively increased, the adhesion strength of the matt powder coating is increased, the cracks of the coating are effectively prevented, and the wear resistance is enhanced; through the synergistic effect of the epoxy modified acrylic resin and the tea stalk wood fiber, the coating is effectively prevented from falling off, the photocatalyst medium is locked, the effective concentration of the photocatalyst medium is prevented from being gradually reduced, and the catalytic decomposition efficiency is ensured.
It should be understood that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The nano photocatalyst coating is characterized by comprising the following components in parts by weight:
30-50 parts of nano titanium dioxide, 25-45 parts of nano silicon dioxide, 35-45 parts of epoxy modified acrylic resin, 12-16 parts of tea stalk wood fiber, 0.1-0.5 part of ultraviolet absorber, 2-6 parts of dispersant, 1-5 parts of defoamer, 1-5 parts of thickener and 25-45 parts of deionized water.
2. The nano-photocatalyst coating as claimed in claim 1, which comprises the following components in parts by weight:
35-45 parts of nano titanium dioxide, 30-40 parts of nano silicon dioxide, 38-42 parts of epoxy modified acrylic resin, 13-15 parts of tea stalk wood fiber, 0.2-0.4 part of ultraviolet absorber, 3-5 parts of dispersant, 2-4 parts of defoamer, 2-4 parts of thickener and 30-40 parts of deionized water.
3. The nano-photocatalyst coating as claimed in claim 1, which comprises the following components in parts by weight:
40 parts of nano titanium dioxide, 35 parts of nano silicon dioxide, 40 parts of epoxy modified acrylic resin, 14 parts of tea stalk wood fiber, 0.3 part of ultraviolet absorbent, 4 parts of dispersant, 3 parts of defoaming agent, 3 parts of thickener and 35 parts of deionized water.
4. The nano-photocatalyst coating as claimed in claim 1, wherein the ultraviolet absorber is phenyl salicylate.
5. The nano-photocatalyst coating as claimed in claim 1, wherein the dispersing agent is polyacrylamide, the defoaming agent is polydimethylsiloxane, and the thickener is silicone gel.
6. The nano photocatalyst coating as claimed in claim 1, wherein the epoxy modified acrylic resin is prepared by the following steps:
1) uniformly mixing epoxy resin and acrylic resin according to the mass ratio of 1:5, dissolving in an ethanol solvent, and placing in a reaction device;
2) and then adding 0.5 percent by mass of maleic anhydride, continuously stirring, and carrying out heat preservation reaction for 4 hours at the temperature of 90 ℃ to obtain the epoxy modified acrylic resin.
7. A method for preparing the nano-photocatalyst coating as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
1) mixing nano titanium dioxide and nano silicon dioxide, adding deionized water, adding a dispersing agent, and uniformly dispersing to obtain a first mixture;
2) heating the first mixture to 105-110 ℃, adding epoxy modified acrylic resin and tea stalk wood fiber, and simultaneously refluxing and stirring for 20-30 min to obtain a second mixture;
3) adding an ultraviolet absorbent, a defoaming agent and a thickening agent into the second mixture, heating to 70-75 ℃, and stirring for reacting for 20-40 min to obtain a third mixture;
4) and extruding and granulating the third mixture to obtain granules, freezing and grinding the granules at low temperature, and sieving to obtain the nano photocatalyst coating.
8. The method for preparing nano photocatalyst coating according to claim 7, wherein the stirring speed in the step 2) is 600-800 r/min.
9. The method for preparing nano photocatalyst coating according to claim 7, wherein the stirring speed in the step 3) is 200-300 r/min.
10. The method for preparing nano photocatalyst coating according to claim 7, wherein the milled powder in the step 4) has a particle size of 5-10 nm.
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| JP2005296836A (en) * | 2004-04-13 | 2005-10-27 | Chugoku Marine Paints Ltd | COMPOSITE, SUBSTRATE COATED WITH COATING COMPRISING THE COMPOSITE, AND METHOD FOR PRODUCING SUBSTRATE WITH COATING |
| CN102093765A (en) * | 2010-11-26 | 2011-06-15 | 江苏考普乐新材料股份有限公司 | Powder coating and preparation method thereof |
| CN106497329A (en) * | 2016-10-28 | 2017-03-15 | 福建万安实业集团有限公司 | A kind of high adhesion force sub-smooth type powdery paints and preparation method thereof |
| CN109111811A (en) * | 2018-06-12 | 2019-01-01 | 佛山市华强协兴陶瓷有限公司 | A kind of high adhesion force exterior wall acrylic coating |
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- 2021-02-22 CN CN202110197966.9A patent/CN112831237A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005296836A (en) * | 2004-04-13 | 2005-10-27 | Chugoku Marine Paints Ltd | COMPOSITE, SUBSTRATE COATED WITH COATING COMPRISING THE COMPOSITE, AND METHOD FOR PRODUCING SUBSTRATE WITH COATING |
| CN102093765A (en) * | 2010-11-26 | 2011-06-15 | 江苏考普乐新材料股份有限公司 | Powder coating and preparation method thereof |
| CN106497329A (en) * | 2016-10-28 | 2017-03-15 | 福建万安实业集团有限公司 | A kind of high adhesion force sub-smooth type powdery paints and preparation method thereof |
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