CN106977982B - A kind of nano-pore heat insulating materials coating for surface protection and preparation method thereof - Google Patents
A kind of nano-pore heat insulating materials coating for surface protection and preparation method thereof Download PDFInfo
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- CN106977982B CN106977982B CN201710205701.2A CN201710205701A CN106977982B CN 106977982 B CN106977982 B CN 106977982B CN 201710205701 A CN201710205701 A CN 201710205701A CN 106977982 B CN106977982 B CN 106977982B
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- 239000011148 porous material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000000576 coating method Methods 0.000 title claims description 54
- 239000011248 coating agent Substances 0.000 title claims description 52
- 239000011810 insulating material Substances 0.000 title claims description 46
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 239000002245 particle Substances 0.000 claims abstract description 24
- 239000011253 protective coating Substances 0.000 claims abstract description 20
- 239000010455 vermiculite Substances 0.000 claims abstract description 19
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 19
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims abstract description 14
- XYRAEZLPSATLHH-UHFFFAOYSA-N trisodium methoxy(trioxido)silane Chemical compound [Na+].[Na+].[Na+].CO[Si]([O-])([O-])[O-] XYRAEZLPSATLHH-UHFFFAOYSA-N 0.000 claims abstract description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011343 solid material Substances 0.000 claims abstract description 12
- 238000007654 immersion Methods 0.000 claims abstract description 6
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- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 25
- -1 phosphoric acid aluminum Chemical compound 0.000 claims description 21
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 20
- 238000000498 ball milling Methods 0.000 claims description 20
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 229910021536 Zeolite Inorganic materials 0.000 claims description 17
- 239000010457 zeolite Substances 0.000 claims description 17
- 239000010445 mica Substances 0.000 claims description 16
- 229910052618 mica group Inorganic materials 0.000 claims description 16
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000000395 magnesium oxide Substances 0.000 claims description 10
- 239000011787 zinc oxide Substances 0.000 claims description 9
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical group CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 238000004078 waterproofing Methods 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 208000021017 Weight Gain Diseases 0.000 claims description 5
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- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 208000005156 Dehydration Diseases 0.000 claims description 2
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- CAQWNKXTMBFBGI-UHFFFAOYSA-N C.[Na] Chemical compound C.[Na] CAQWNKXTMBFBGI-UHFFFAOYSA-N 0.000 claims 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 239000011701 zinc Substances 0.000 claims 1
- 239000000758 substrate Substances 0.000 abstract description 12
- 239000012774 insulation material Substances 0.000 abstract description 5
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 24
- 238000010998 test method Methods 0.000 description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
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- 239000007767 bonding agent Substances 0.000 description 6
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
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- 238000002791 soaking Methods 0.000 description 5
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- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 238000013467 fragmentation Methods 0.000 description 4
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 241001251094 Formica Species 0.000 description 1
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- 229910021485 fumed silica Inorganic materials 0.000 description 1
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- TVZISJTYELEYPI-UHFFFAOYSA-N hypodiphosphoric acid Chemical compound OP(O)(=O)P(O)(O)=O TVZISJTYELEYPI-UHFFFAOYSA-N 0.000 description 1
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
本发明公开了一种纳米孔绝热材料表面保护涂层及其制备方法，固体材料的处理：将膨胀蛭石颗粒经高温预处理后与液态磷酸二氢铝混匀、将沸石颗粒按浸没量加入液态磷酸二氢铝，球磨至平均粒径小于4μm；碱金属氧化物加入乙醇、球磨至平均粒径小于4μm，将云母颗粒用水浸没后球磨至平均粒径小于4μm，后经300℃烘烤脱水；上述处理好的固体材料与液态磷酸二氢铝、甲基硅酸钠按比例混合制成浆料，进入高剪切混合机中以1500‑3000 rpm混合30‑100分钟，以喷涂或涂刷方式施加到纳米孔绝热材料基体上以浸渍入孔，干燥后形成防水的保护涂层。本发明无尘、不脱落，可以抵抗相对较高的碰撞冲击，防水、防火且环保。The invention discloses a protective coating on the surface of a nanoporous thermal insulation material and a preparation method thereof. The treatment of the solid material comprises the steps of mixing expanded vermiculite particles with liquid aluminum dihydrogen phosphate after high-temperature pretreatment, and adding the zeolite particles according to the immersion amount. Liquid aluminum dihydrogen phosphate, ball-milled to an average particle size of less than 4μm; alkali metal oxides are added with ethanol, ball-milled to an average particle size of less than 4μm, immersed in water, ball-milled to an average particle size of less than 4μm, and then baked at 300°C for dehydration ; The above-mentioned treated solid material is mixed with liquid aluminum dihydrogen phosphate and sodium methyl silicate in proportion to make a slurry, which is mixed in a high-shear mixer for 30-100 minutes at 1500-3000 rpm, and then sprayed or brushed. It is applied to the nanoporous thermal insulation material substrate to impregnate into the pores, and after drying, it forms a waterproof protective coating. The present invention is dust-free and does not fall off, can resist relatively high collision impact, is waterproof, fireproof and environmentally friendly.
Description
Technical field
The present invention relates to field of material technology, in particular to a kind of nano-pore heat insulating materials coating for surface protection, simultaneously also
It is related to the preparation method of the nano-pore heat insulating materials coating for surface protection.
Background technique
Nano-pore heat insulating materials are a kind of newly-developeds, are mainly directed towards high and low temperature engineering thermal insulation, are made of nanotechnology
Novel heat insulation material, the network structure of nanoaperture (be less than 100nm) and its infra-red radiation and scattering to industrial wavelength
Characteristic can effectively inhibit solid, gaseous heat conduction, gaseous exchange and radiant heat transfer.It is compared with traditional insulation materials, nano-pore is exhausted
Hot material can usually reduce insulation thickness 3/4, and under identical insulation thickness, fractional energy savings generally reaches 25-30%, not only may be used
The energy consumption in production and use is significantly reduced, also the size and weight of equipment is accordingly enable to be greatly reduced.
In recent years, nano-pore heat insulating materials are because of its excellent heat-insulated, flame retardant property, in glass industry, Industrial Stoves, electrolysis
Aluminium, electric heating accumulator, elevator, ship, military project etc. need the fields such as energy-efficient and fire-retardant, fire prevention to be applied widely.But
The material is to guarantee its excellent thermal conduction study performance, and organic or inorganic bonding agent is not used in routinely production and mainly uses powder
Molded technique, therefore its surface is not wear-resisting, non-watertight, integral strength is low, cannot collide.It is general using warp in common process
The glass fabric of specially treated does envelope material and is protected, in order to transport and install.The technique uses glass-fiber-fabric big envelope
With core material once moulding method, production suitable for the conventional sheet not high to required precision.Some pairs of required precisions compared with
Height, and the field of the special-shaped structure pieces such as curved surface, aperture, groove, step is needed, a large amount of artificial sanction is needed using glass cloth encapsulation
Subtract and bonding process, production cost is increased with regard to this, and keep process flow complex, it is difficult to reach the mesh of industrialized production
Mark.The especially packaged type of glass fabric, however it remains dust leakage problem is unable to satisfy food industry machine, medical treatment
The use condition of health equipment and military optics equipment, thus limit the application field of nano-pore heat insulating materials.
In order to produce the dustless nano-pore heat insulating materials component of stable structure and surface, protective coating is made on its surface
It is the method most easily realized.The coating should meet stable structure, film forming, and uniformly binding force between core material is strong, and surface is without tortoise
It splits and dust releasing, has the characteristic of high temperature resistant and anti-thermal shock and do not influence substrate performance.
Show that the conventional use of high temperature in fire-resistant heat insulating material field is organic and inorganic coating is deposited through inventor's many experiments
Phenomena such as coating cracking, falling off, it is difficult to use.The relevant lot of documents report of protective coating is almost mostly focused on structure
The higher porous ceramics field of intensity, the coating solution in relation to being directed to nano-pore heat insulating materials, United States Patent (USP) 5,474,806
A kind of application water based protective coating is disclosed to the method on nano-pore heat insulating materials surface, this method thinks due to conventional nano
The hydrophily of hole heat-insulating material applies water based protective coating, it is easy to cause material surface to soak and absorb water, water is dried
Cheng Zhonghui destroys microcellular structure, so as to cause the reduction of heat-insulating property.Therefore the patent proposes to use hydrophobic type gas phase silica
To manufacture nano-pore heat insulating materials, is sparkled using gas nozzle and burn or heated in furnace body high temperature to destroy organic hydrophobic layer, generated
Surface hydrophilic, the hydrophobic heat-barrier material of matrix are then surface-treated with water base sodium metasilicate bonding agent, are easy to soak in this way
It simultaneously adsorbs there or forms continuous protective coating, it can be achieved that wear-resisting and Collision-free is without will cause basis material in surface layer
Shrink the destruction with microcellular structure.Though the principle of this method is relatively simple, needed in process of production using the hydrophobic of valuableness
Type fumed silica, and need to increase the high temperature ablation technique for destroying surface water-repellent layer, cause the production cost of product substantially
Improve, and the temperature of high temperature ablation technique and processing time be it is very rambunctious, which dictates that the thickness of ablation layer, and then certainly
Coating layer thickness is determined, in the case where industrial production, material generally uses stacking to place, and there are temperature gradients between each layer, most
The thickness of whole coating must thickness it is different, and silicate bonding agent is in nano-pore heat insulating materials common high temperature application, because of it
Higher alkalinity and brittleness are not suitable bonding agent.In addition, hydrophobic type gaseous oxidation object particle is due to organic coating layer
In the presence of reducing the adhesive strength between particle, the integral strength of material is lower, more not wear-resisting, and such protective layer is likely to
It loses more than gain.
Summary of the invention
The one kind provided it is an object of the invention to overcome disadvantages mentioned above is dustless, does not fall off, and can resist relatively high
Collision impact, waterproof, fire prevention and the nano-pore heat insulating materials of environmental protection coating for surface protection.
Another object of the present invention is to provide the preparation methods of the nano-pore heat insulating materials coating for surface protection.
A kind of nano-pore heat insulating materials coating for surface protection of the invention, formulation weight part are as follows:
Liquid phosphoric acid aluminum dihydrogen 45-75
Expanded vermiculite 10-30
Zeolite 3-6
Mica 8-12
Waterproofing agent of organosilicon (sodium methyl silicate) 1.9-7
Alkali metal oxide (zinc oxide, magnesia) 1.5-3
Dispersing agent (Duramax D-3005) 0.1-0.5
It is preferred that the parts by weight of each ingredient are as follows:
Liquid phosphoric acid aluminum dihydrogen 60
Expanded vermiculite 15
Zeolite 6
Mica 12
Alkali metal oxide 3
Waterproofing agent of organosilicon (sodium methyl silicate) 3.7
Dispersing agent (Duramax D-3005) 0.3
A kind of preparation method of the coating for surface protection of nano-pore heat insulating materials of the invention, comprising the following steps:
(1) processing of solid material:
A. by expanded vermiculite particle after high temperature pre-processes, 2-5 parts are taken to mix with 1 part of liquid phosphoric acid aluminum dihydrogen, then use
In the ball mill of alumina balls ball milling 24-48 hours to average grain diameter less than 4 μm (in order to penetrate into nano-pore heat insulating materials
Surface pore, avoid being only attached to surface and being easy to fall off)；
B. liquid phosphoric acid is added by submergence amount (solid particle keeps liquid-immersed after adsorbing liquid completely) in zeolite granular
Aluminum dihydrogen, using ball milling 24-48 hours in the ball mill of alumina balls to average grain diameter less than 4 μm；
C. ethyl alcohol is added in alkali metal oxide, using ball milling 24-48 hours in the ball mill of alumina balls to average grain diameter
Less than 4 μm；
D. by after mica particles water immersion, using ball milling 24-48 hours in the ball mill of alumina balls to average grain diameter
Less than 4 μm, by 300 DEG C of baking dehydrations；
(2) the above-mentioned solid material handled well and liquid phosphoric acid aluminum dihydrogen, sodium methyl silicate are mixed in following ratios
Slurry,
Liquid phosphoric acid aluminum dihydrogen 45-75
Expanded vermiculite 10-30
Zeolite 3-6
Mica 8-12
Waterproofing agent of organosilicon (sodium methyl silicate) 1.9-7
Alkali metal oxide (zinc oxide, magnesia) 1.5-3
Dispersing agent (Duramax D-3005) 0.1-0.5
Into with 1500-3000 rpm mixing 30-100 minutes, being applied in high shear mixer with spraying or painting way
To be impregnated into hole on to nano-pore heat insulating materials matrix；
(3) it dries 30 minutes at normal temperature, enters back into furnace and carry out 3-8 minutes rapid draing (Yin Ji at 80-120 DEG C
The high air content of material, for a long time heating can cause surface coating material bulge, delamination or cracking, and temperature is crossed hypophosphate and cannot be dehydrated admittedly
Change) after starching quantity is dry, it is insulated 1.8-3.0 grams of body weight gains/cm2, form the wear-resisting of 0.3-0.5mm, high temperature resistant (same to substrate
Equality of temperature) waterproof protective coating.
Coating performance test:
Since the structural strength of nano-pore heat insulating materials substrate is extremely low, manufactured protective coating can not class according to the above method
Than the coating formed on the rigid substrates such as metal, ceramics, concrete, the measurement of the bond strength of coating and substrate cannot be used
Conventional, such as: bending, substrate stretching, rasion, abrasion experimental method.Actually generated on nano-pore heat insulating materials substrate
The main purpose of protective coating is realization while keeping substrate heat-insulating property simultaneously of the manual operations such as convenient transportation, installation
Moisture-proof and thermal shock resistance, therefore the protective coating is not necessarily to reach the requirement of those rigid substrate coatings, wear-resisting, impact resistant punching
The performance hit uses qualitative method with micro-judgment and is relatively more applicable in state.
1) wear-resisting, impact resistant impact: if conventional nano hole heat-insulating material does not use protectiveness glass fabric big envelope,
It handles with care or stacking placement all can cause surface powder to fall off, especially the rib of special-shaped component, side, chamfering, hole etc. easily exist
It is destroyed in transport and installation process, less impact resistant is impacted.The test block of 110*110*20, uncoated material are used in experiment
Falling for 5cm high can cause to be broken, and use the same test block by protective coating made of the present invention, fall fracture height
It improves to 45cm, and easy to operate, stacking is installed and is not lost powder, appearance film forming is uniform, no cracking.
2) temperature tolerance: astmC356 Test Method for Linear Shrinkage of is pressed
PreformedHigh-Temperature Thermal Insulation Subjected to SoakingHeat(is preforming
High temperature thermal insulation material is placed in the linear shrinkage test method under soaking)-correlation national standard: GBT 5486-2008 inorganic hard insulation system
Product test method: it uses and integrally presents satisfied temperature tolerance and heat resistanceheat resistant by the same test block of protective coating made of the present invention
Pinking (is observed in 24 hours, the experiment that 900 degree of soaking and does not blister, fragmentation or degrades.Length-width direction shrinks 1.7%, thickness
It spends direction and shrinks 5.5%, meet the requirement of astmC1676.
3) water imbibition: astmC1104/C 1104M Test Method for Determining the is pressed
WaterVapor Sorption of Unfaced Mineral Fiber Insulation(determines non-veneer mineral fibres water
The test method of vapor sorption)-correlation national standard: GBT 10299-1988 Test method for hydrophobic nature of thermal insulation, using by this hair
The same test block of protective coating made of bright, vapor sorption weight percent is 6.1%, and conventional material vapor sorption weight
Percentage is 9.4%
4) thermal coefficient: average using the nano-pore heat insulating materials of coating of the present invention by the test method of astmC1676
At 100 DEG C of temperature, thermal coefficient 0.021w/m.k, at 500 DEG C of mean temperature, thermal coefficient 0.0275w/m.k is routinely received
The corresponding thermal coefficient of metre hole heat-insulating material, at 100 DEG C of mean temperature, thermal coefficient 0.020w/m.k, 500 DEG C of mean temperature
When, thermal coefficient 0.0270w/m.k has almost no change, it was demonstrated that coating of the invention does not destroy matrix structure.
The present invention compared with the existing technology has clear advantage and beneficial effect.From the above technical scheme, this hair
Bright premenstruum (premenstrua) many experiments and research has shown that, nano-pore heat insulating materials surface, which is difficult to the main reason for generating stable protective coating, is
Other than its surface strength is lower, rich in a large amount of air, (air content volume accounting even reaches in internal nanoaperture structure
To 90%), when the ambient temperature changes, due to the variation of gas volume, different degrees of gas can be generated between the external world
Exchange, coating structure and expanding with heat and contract with cold for matrix will cause the Light deformation of material surface in addition, and traditional coating is impermeable mostly
Therefore gas material, can occur being cracked and obscission coated in nano-pore heat insulating materials surface.To avoid this phenomenon, coating is constituted
Framework material should have thermal expansivity and gas permeability, i.e. coating framework material should have the function as temperature and expand
Or the characteristic shunk should also have the bedding architecture for guaranteeing coating stable furthermore when fine three dimensional change occurs in coating structure.
Such protective coating, even water base, as long as coating is relatively thin, adsorbed moisture content will not destroy micro- in the drying process
Pore structure.Therefore coating formula of the invention, with 45wt%-75wt%(45-75 parts by weight) liquid phosphoric acid aluminum dihydrogen makees bonding agent,
10 wt %-35wt %(10-35 parts by weight) expanded vermiculite and 3wt %-10wt %(3-10 parts by weight) zeolite as coating bone
Material, 8 wt %-18 wt %(8-18 parts by weight) for mica particles as coating stable material, 1.5 wt %-7wt %(1.5-7 are heavy
Amount part) as curing agent and 2wt %-7wt %(2-7 parts by weight are added in alkali metal oxide) organosilicon constituted as waterproofing agent
Whole formulation for coating material.Can wherein be realized using aluminium dihydrogen phosphate as bonding agent low-temperature high-strength be bonded, and with various inorganic high-temps
The compatibility of material is stronger, and especially it can generate needle-like crystal with the silica on nano-pore heat insulating materials surface layer, improves
Cementability is resistant to 1700 DEG C of high temperature, covers the temperature use scope of nano-pore heat insulating materials；Coating framework material is using swollen
Swollen vermiculite and zeolite can make full use of the dilatancy of vermiculite and gas permeability to resist the variation of environment temperature, and zeolite has stabilization
Hollow structure and micron-class superfine hole and expanded vermiculite cooperation, during curing of coatings can guarantee hole inside and outside formed
Integral structure strengthens solidification intensity；Coating auxiliary material can utilize its sheet bedding architecture using mica, and being added in coating can make
For the stabilizer of coating, when fine three dimensional change occurs in coating structure, mica can help its variation to prevent the micro-structures such as cracking broken
It is bad；Alkali metal oxide such as zinc oxide and magnesia etc., which is added, to accelerate coating to harden；Organosilicon (sodium methyl silicate) is soluble in
Water, can be preferably fused with other formulation for coating material of the invention, can be netted in one layer of nano-pore heat insulating materials substrate surface layer formation
Waterproof ventilated membrane has the advantages that preferable waterproof effect and antiseepage, moisture-proof, avoids moisture sucking substrate.Coating of the present invention without
Dirt is not fallen off, and can be resisted relatively high collision impact, and waterproof, fire prevention, will not be discharged toxic gas in use
And smog.
Specific embodiment
Embodiment 1
A kind of preparation method of the coating for surface protection of nano-pore heat insulating materials, comprising the following steps:
(1) processing of solid material:
A. the expanded vermiculite particle after 800 DEG C of high temperature being pre-processed 1 hour is mixed with the ratio of 4:1 and liquid phosphoric acid aluminum dihydrogen
It is even, it is then spare after ball milling 48 hours in the ball mill；
B. liquid phosphoric acid is added by submergence amount (solid particle keeps liquid-immersed after adsorbing liquid completely) in zeolite granular
Aluminum dihydrogen, it is then spare after ball milling 48 hours in the ball mill；
C. ethyl alcohol is added (after solid particle adsorbs liquid completely in alkali metal oxide (zinc oxide, magnesia are in 3:1 ratio)
Keep liquid-immersed), in the ball mill ball milling 48 hours it is spare；
D. by after mica particles water immersion, ball milling 48 hours, are toasted 1 hour by 300 DEG C after being dehydrated in the ball mill
It is spare；
(2) the above-mentioned solid material handled well and liquid phosphoric acid aluminum dihydrogen, sodium methyl silicate are in following ratios
Liquid phosphoric acid aluminum dihydrogen 60
Expanded vermiculite 15
Zeolite 6
Mica 12
Zinc oxide 3
Sodium methyl silicate 3.7
Dispersing agent (Duramax D-3005 is purchased from Rohm and Haas, France) 0.3
It is mixed and made into slurry, is mixed 75 minutes into high shear mixer with 3000 rpm, with spraying or painting way
It is applied to nano-pore heat insulating materials matrix；
(3) it dries 30 minutes at normal temperature, enters back into furnace and carry out rapid draing in 5 minutes, starching number at 80-120 DEG C
After amount is dry, it is insulated 2.3 grams/cm of body weight gains2, form the protective coating of about 0.4mm.
Coating performance test:
1) wear-resisting, impact resistant impact: appearance of coat film forming uniformly, no cracking and fall off, using the examination of 110*110*20
Block, falling fracture height is 45cm.
2) temperature tolerance: being tested by astmC356 standard, observes do not have in 24 hours, the experiment that 900 degree of soaking
Blistering, fragmentation are degraded.Length-width direction shrinks 1.7%, and thickness direction shrinks 5.5%, meets the requirement of astmC1676.
3) water imbibition: being tested by astmC1104/C 1104M standard, and vapor sorption weight percent is 6.1%.
4) thermal coefficient: average using the nano-pore heat insulating materials of coating of the present invention by the test method of astmC1676
At 100 DEG C of temperature, thermal coefficient 0.021w/m.k, at 500 DEG C of mean temperature, thermal coefficient 0.0275w/m.k.
Embodiment 2
A kind of preparation method of the coating for surface protection of nano-pore heat insulating materials, comprising the following steps:
(1) processing of solid material:
A. the expanded vermiculite particle after 800 DEG C of high temperature being pre-processed 1 hour is mixed with the ratio of 4:1 and liquid phosphoric acid aluminum dihydrogen
It is even, it is then spare after ball milling 48 hours in the ball mill；
B. liquid phosphoric acid is added by submergence amount (solid particle keeps liquid-immersed after adsorbing liquid completely) in zeolite granular
Aluminum dihydrogen, it is then spare after ball milling 48 hours in the ball mill；
C. ethyl alcohol is added (after solid particle adsorbs liquid completely in alkali metal oxide (zinc oxide, magnesia are in 3:1 ratio)
Keep liquid-immersed), in the ball mill ball milling 48 hours it is spare；
D. by after mica particles water immersion, ball milling 48 hours, are toasted 1 hour by 300 DEG C after being dehydrated in the ball mill
It is spare；
(2) the above-mentioned solid material handled well and liquid phosphoric acid aluminum dihydrogen, sodium methyl silicate are in following ratios
Liquid phosphoric acid aluminum dihydrogen 75
Expanded vermiculite 10
Zeolite 3
Mica 8
Magnesia 2
Sodium methyl silicate 1.9
Dispersing agent (Duramax D-3005) 0.1
It is mixed and made into slurry, is mixed 75 minutes into high shear mixer with 3000 rpm, with spraying or painting way
It is applied on nano-pore heat insulating materials matrix to be impregnated into hole；
(3) it dries 30 minutes at normal temperature, enters back into furnace and carry out rapid draing in 8 minutes, starching number at 80-120 DEG C
After amount is dry, it is insulated 1.8 grams/cm of body weight gains2, form the protective coating of about 0.3mm.
Coating performance test:
1) wear-resisting, impact resistant impact: uniformly, no cracking, nothing falls off appearance of coat film forming, using the examination of 110*110*20
Block, falling fracture height is 37cm.
2) temperature tolerance: being tested by astmC356 standard, observes do not have in 24 hours, the experiment that 900 degree of soaking
Blistering, fragmentation are degraded.Length-width direction shrinks 1.5%, and thickness direction shrinks 5.7%, meets the requirement of astmC1676.
3) water imbibition: being tested by astmC1104/C 1104M standard, and vapor sorption weight percent is 7.3%.
4) thermal coefficient: average using the nano-pore heat insulating materials of coating of the present invention by the test method of astmC1676
At 100 DEG C of temperature, thermal coefficient 0.020w/m.k, at 500 DEG C of mean temperature, thermal coefficient 0.0251w/m.k.
Embodiment 3
A kind of preparation method of the coating for surface protection of nano-pore heat insulating materials, comprising the following steps:
(1) processing of solid material:
A. the expanded vermiculite particle after 800 DEG C of high temperature being pre-processed 1 hour is mixed with the ratio of 4:1 and liquid phosphoric acid aluminum dihydrogen
It is even, it is then spare after ball milling 48 hours in the ball mill；
B. liquid phosphoric acid is added by submergence amount (solid particle keeps liquid-immersed after adsorbing liquid completely) in zeolite granular
Aluminum dihydrogen, it is then spare after ball milling 48 hours in the ball mill；
C. ethyl alcohol is added (after solid particle adsorbs liquid completely in alkali metal oxide (zinc oxide, magnesia are in 3:1 ratio)
Keep liquid-immersed), in the ball mill ball milling 48 hours it is spare；
D. by after mica particles water immersion, ball milling 48 hours, are toasted 1 hour by 300 DEG C after being dehydrated in the ball mill
It is spare；
(2) the above-mentioned solid material handled well and liquid phosphoric acid aluminum dihydrogen, sodium methyl silicate are in following ratios
Liquid phosphoric acid aluminum dihydrogen 45
Expanded vermiculite 30
Zeolite 5
Mica 11
Zinc oxide or magnesia 1.5
Sodium methyl silicate 7
Dispersing agent (Duramax D-3005) 0.5
It is mixed and made into slurry, is mixed 75 minutes into high shear mixer with 3000 rpm, with spraying or painting way
It is applied on nano-pore heat insulating materials matrix to be impregnated into hole；
(3) it dries 30 minutes at normal temperature, enters back into furnace and carry out rapid draing in 3 minutes, starching number at 80-120 DEG C
After amount is dry, it is insulated 2.7 grams/cm of body weight gains2, form the protective coating of about 0.4mm.
Coating performance test:
1) wear-resisting, impact resistant impact: appearance of coat film forming is substantially uniform, has slightly crackle, but without falling off, using 110*
The test block of 110*20, falling fracture height is 49cm.
2) temperature tolerance: being tested by astmC356 standard, observes do not have in 24 hours, the experiment that 900 degree of soaking
Blistering, fragmentation are degraded.Length-width direction shrinks 1.9%, and thickness direction shrinks 7.5%, meets the requirement of astmC1676.
3) water imbibition: being tested by astmC1104/C 1104M standard, and vapor sorption weight percent is 4.7%.
4) thermal coefficient: average using the nano-pore heat insulating materials of coating of the present invention by the test method of astmC1676
At 100 DEG C of temperature, thermal coefficient 0.0218w/m.k, at 500 DEG C of mean temperature, thermal coefficient 0.0278w/m.k.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form, appoint
What is to the above embodiments according to the technical essence of the invention any simply to repair without departing from technical solution of the present invention content
Change, equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (6)
1. a kind of nano-pore heat insulating materials coating for surface protection, formulation weight part are as follows:
Liquid phosphoric acid aluminum dihydrogen 45-75
Expanded vermiculite 10-30
Zeolite 3-6
Mica 8-12
Waterproofing agent of organosilicon 1.9-7
Alkali metal oxide 1.5-3
Dispersing agent 0.1-0.5.
2. a kind of nano-pore heat insulating materials coating for surface protection as described in claim 1, formulation weight part are as follows:
Liquid phosphoric acid aluminum dihydrogen 60
Expanded vermiculite 15
Zeolite 6
Mica 12
Alkali metal oxide 3
Waterproofing agent of organosilicon 3.7
Dispersing agent 0.3.
3. nano-pore heat insulating materials coating for surface protection as claimed in claim 1 or 2, in which: waterproofing agent of organosilicon is methyl
Sodium metasilicate.
4. nano-pore heat insulating materials coating for surface protection as claimed in claim 1 or 2, in which: alkali metal oxide is oxidation
Zinc or magnesia.
5. nano-pore heat insulating materials coating for surface protection as claimed in claim 1 or 2, in which: dispersing agent is Duramax D-
3005。
6. a kind of preparation method of the coating for surface protection of nano-pore heat insulating materials, comprising the following steps:
(1) processing of solid material:
A. by expanded vermiculite particle after high temperature pre-processes, 2-5 parts are taken to mix with 1 part of liquid phosphoric acid aluminum dihydrogen, using oxidation
In the ball mill of aluminium ball ball milling 24-48 hours to average grain diameter less than 4 μm；
B. liquid phosphoric acid aluminum dihydrogen is added by submergence amount in zeolite granular, it is small using ball milling 24-48 in the ball mill of alumina balls
Up to average grain diameter less than 4 μm；
C. alkali metal oxide be added ethyl alcohol, using ball milling 24-48 hours in the ball mill of alumina balls to average grain diameter less than 4
μm；
D. by after mica particles water immersion, using ball milling 24-48 hours in the ball mill of alumina balls to average grain diameter less than 4
μm, by 300 DEG C of baking dehydrations；
(2) the above-mentioned solid material handled well and liquid phosphoric acid aluminum dihydrogen, sodium methyl silicate are mixed and made into slurry in following ratios,
Liquid phosphoric acid aluminum dihydrogen 45-75
Expanded vermiculite 10-30
Zeolite 3-6
Mica 8-12
Sodium methyl silicate 1.9-7
Zinc oxide or magnesia 1.5-3
Dispersing agent Duramax D-3005 0.1-0.5
Into with 1500-3000 rpm mixing 30-100 minutes, being applied to and receive with spraying or painting way in high shear mixer
To be impregnated into hole on metre hole heat-insulating material matrix；
(3) it dries 30 minutes at normal temperature, enters back into furnace and carry out rapid draing in 3-8 minutes, starching quantity at 80-120 DEG C
After drying, it is insulated 1.8-3.0 grams of body weight gains/cm2, form the protective coating of the waterproof of 0.3-0.5mm.
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|---|---|---|---|---|
| US5474806A (en) * | 1992-02-07 | 1995-12-12 | Zortech International Limited | Coating surface of hydrophobic microporous thermal insulation material |
| WO2000044036A1 (en) * | 1999-01-26 | 2000-07-27 | Alliedsignal Inc. | Use of multifunctional si-based oligomer/polymer for the surface modification of nanoporous silica films |
| CN103589258A (en) * | 2013-10-16 | 2014-02-19 | 纳诺科技有限公司 | Aerogel coating and production method and application thereof |
| CN104761974A (en) * | 2015-03-18 | 2015-07-08 | 蚌埠市高华电子有限公司 | Radiation heat-insulating coating having anti-cracking and peeling-resistant functions and preparation method thereof |
| CN106316439A (en) * | 2015-06-15 | 2017-01-11 | 上海赐业新能源材料科技有限公司 | Method for preparing high strength waterproof nano micropore insulation board |
-
2017
- 2017-03-31 CN CN201710205701.2A patent/CN106977982B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5474806A (en) * | 1992-02-07 | 1995-12-12 | Zortech International Limited | Coating surface of hydrophobic microporous thermal insulation material |
| WO2000044036A1 (en) * | 1999-01-26 | 2000-07-27 | Alliedsignal Inc. | Use of multifunctional si-based oligomer/polymer for the surface modification of nanoporous silica films |
| CN103589258A (en) * | 2013-10-16 | 2014-02-19 | 纳诺科技有限公司 | Aerogel coating and production method and application thereof |
| CN104761974A (en) * | 2015-03-18 | 2015-07-08 | 蚌埠市高华电子有限公司 | Radiation heat-insulating coating having anti-cracking and peeling-resistant functions and preparation method thereof |
| CN106316439A (en) * | 2015-06-15 | 2017-01-11 | 上海赐业新能源材料科技有限公司 | Method for preparing high strength waterproof nano micropore insulation board |
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