CN105733134A - Anti-mildew plastic and preparation method thereof - Google Patents

Abstract

The invention discloses a mildew-proof plastic and a preparation method thereof, which comprises: 1) mixing silicon dioxide, asbestos, kaolin, zinc borate, Chinese herbal medicine and water, decocting the mixture, filtering and taking filter cake to obtain an antibacterial activator; 2) mixing polyvinyl chloride, ethylene-ethyl acrylate copolymer, polyimide, tris(2,4-di-tert-butylphenyl)phosphite, sodium lauramide ethyl sulfate, carbon nanotubes, zirconium phosphate, bamboo leaf phenol, wollastonite fiber, vinyl trimethoxysilane and the antibacterial activator, and then processing and molding to obtain the mildew-proof plastic; the Chinese herbal medicine comprises platycodon, sophora japonica fruit, artemisia argyi, arisaema, patchouli, toona sinensis, guanzhong, tricha bitter, chuantong bark, schisandra chinensis, jiuli ming, manna and horsetail. The plastic obtained by the method has excellent antibacterial properties and mechanical strength, and the raw materials are easy to obtain and the process is simple.

Description

Anti-mildew plastic and preparation method thereof

technical field

The invention relates to plastics, in particular to a mildew-resistant plastic and a preparation method thereof.

Background technique

Plastic is a high molecular compound polymerized by addition polymerization or polycondensation reaction with monomer as raw material. It is commonly known as plastic or resin. It can freely change its composition and shape. , Colorants and other additives. The main component of plastic is resin. The term resin was originally named after the lipids secreted by animals and plants, such as rosin, shellac, etc. Resin refers to a polymer compound that has not been mixed with various additives. Resin accounts for about 40%-100% of the total weight of plastic. The basic properties of plastics are mainly determined by the nature of the resin, but additives also play an important role. Some plastics are basically composed of synthetic resins, with no or few additives, such as plexiglass, polystyrene, etc.

At present, plastics are often made into containers to hold objects, and after the objects are placed in plastic containers for a long time, mildew or a large number of bacteria will often occur at the contact between the objects and the container, which will accelerate the corruption of the stored objects, especially It is in the case that the object is food.

Contents of the invention

The object of the present invention is to provide a mildew-resistant plastic and its preparation method. The plastic obtained by the method has excellent antibacterial properties and mechanical strength, and the raw material of the method is easy to obtain and the process is simple.

In order to achieve the above object, the invention provides a kind of preparation method of anti-mildew plastics, and this preparation method comprises:

1) Mixing silicon dioxide, asbestos, kaolin, zinc borate, Chinese herbal medicine and water, decocting, and then filtering to take the filter cake to obtain antibacterial activators;

2) Polyvinyl chloride, ethylene-ethyl acrylate copolymer, polyimide, tris (2,4-di-tert-butylphenyl) phosphite, sodium lauramide ethyl sulfate, carbon nanotubes, zirconium phosphate , bamboo leaf ketone, wollastonite fiber, vinyltrimethoxysilane and antibacterial activator are mixed, and then processed and molded to obtain mildew-proof plastic;

Among them, the Chinese herbal medicine contains Platycodon grandiflorum, Sophora japonica, Artemisia chinensis, Southern star, Huoxiang, Toon bark, Guan Zhong, Sanchaku, Chuantong bark, Schisandra chinensis, Jiuliming, Shanjiao and Sage chinensis.

The present invention also provides an anti-mildew plastic, which is prepared by the above-mentioned method.

Through the above technical scheme, the present invention first mixes silicon dioxide, asbestos, kaolin, zinc borate, Chinese herbal medicine and water and decocts, then filters and takes the filter cake to obtain antibacterial active substances; then utilizes polyvinyl chloride, ethylene- Ethyl Acrylate Copolymer, Polyimide, Tris(2,4-di-tert-butylphenyl) Phosphite, Sodium Lauramide Ethyl Sulfate, Carbon Nanotubes, Zirconium Phosphate, Bamboo ketone, Wollastonite Fibers, vinyltrimethoxysilane, and antimicrobial actives are compounded and then molded to create mildew-resistant plastics. The present invention makes the prepared plastic have excellent antibacterial properties and mechanical strength through the synergistic effect of each material and each process, and at the same time, the method has easy-to-obtain raw materials and simple process.

Other features and advantages of the present invention will be described in detail in the following detailed description.

detailed description

Specific embodiments of the present invention will be described in detail below. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

The invention provides a method for preparing mildew-resistant plastics, the preparation method comprising:

1) Mixing silicon dioxide, asbestos, kaolin, zinc borate, Chinese herbal medicine and water, decocting, and then filtering to take the filter cake to obtain antibacterial activators;

2) Polyvinyl chloride, ethylene-ethyl acrylate copolymer, polyimide, tris (2,4-di-tert-butylphenyl) phosphite, sodium lauramide ethyl sulfate, carbon nanotubes, zirconium phosphate , bamboo leaf ketone, wollastonite fiber, vinyltrimethoxysilane and antibacterial activator are mixed, and then processed and molded to obtain mildew-proof plastic;

Among them, the Chinese herbal medicine contains Platycodon grandiflorum, Sophora japonica, Artemisia chinensis, Southern star, Huoxiang, Toon bark, Guan Zhong, Sanchaku, Chuantong bark, Schisandra chinensis, Jiuliming, Shanjiao and Sage chinensis.

In step 1) of the present invention, the consumption of each material can be selected in a wide range, but in order to make the plastics made have more excellent antibacterial properties and mechanical strength, preferably, relative to the silicon dioxide of 100 parts by weight , the consumption of asbestos is 50-78 parts by weight, the consumption of kaolin is 17-26 parts by weight, the consumption of zinc borate is 9-18 parts by weight, the consumption of Platycodon grandiflorum is 23-36 parts by weight, and the consumption of Sophora japonica is 21-27 parts by weight. Parts by weight, the consumption of wormwood is 17-28 parts by weight, the consumption of Nanxing is 25-29 parts by weight, the consumption of Huoxiang is 31-37 parts by weight, the consumption of Chinese toon bark is 36-48 parts by weight, and the consumption of Guanzhong is 36-48 parts by weight. is 14-19 parts by weight, the consumption of Sanchaku is 27-33 parts by weight, the consumption of Chuantong bark is 4-9 parts by weight, the consumption of Schisandra chinensis is 21-26 parts by weight, and the consumption of Jiuli Ming is 14-17 parts by weight , the consumption of mountain nails is 24-29 parts by weight, the consumption of Semen Psago is 10-14 parts by weight, and the consumption of water is 500-700 parts by weight.

In step 1) of the present invention, the conditions of decocting can be selected in a wide range, but in order to make the plastics produced have more excellent antibacterial properties and mechanical strength, preferably, decocting at least meets the following conditions: decocting The temperature is 140-160°C, and the decocting time is 20-40h.

In step 2) of the present invention, the consumption of each material can be selected in a wide range, but in order to make the plastics made have more excellent antibacterial properties and mechanical strength, preferably, in step 2), relative to 100 The polyvinyl chloride of weight part, the consumption of ethylene-ethyl acrylate copolymer is 80-110 weight part, the consumption of polyimide is 45-76 weight part, three (2,4-di-tert-butylphenyl) The amount of phosphoric acid ester is 8-12 parts by weight, the amount of sodium lauramide ethyl sulfate is 20-27 parts by weight, the amount of carbon nanotubes is 7-13 parts by weight, and the amount of zirconium phosphate is 15-19 parts by weight. The consumption of phyllone is 17-22 parts by weight, the consumption of wollastonite fiber is 13-20 parts by weight, the consumption of vinyltrimethoxysilane is 50-90 parts by weight, and the consumption of antibacterial active substance is 45-56 parts by weight share.

In step 2) of the present invention, the types of polyvinyl chloride, ethylene-ethyl acrylate copolymer and polyimide can be selected in a wide range, but in order to make the plastics obtained have more excellent antibacterial properties and mechanical properties Strength, preferably, the weight average molecular weight of polyvinyl chloride is 5000-8000, the weight average molecular weight of ethylene-ethyl acrylate copolymer is 9000-12000, and the weight average molecular weight of polyimide is 3000-7000.

In step 2 of the present invention), the particle diameter of carbon nanotubes can be selected in a wide range, but in order to make the plastics made have more excellent antibacterial properties and mechanical strength, preferably, the particle diameter of carbon nanotubes is 10-20nm.

In step 2) of the present invention, the conditions of mixing can be selected in a wide range, but in order to make the plastics produced have more excellent antibacterial properties and mechanical strength, preferably, mixing at least meets the following conditions: mixing The temperature is 195-210°C, and the mixing time is 4-6h.

In step 2) of the present invention, the manner and conditions of processing and molding can be selected in a wide range, but in order to make the plastics produced have more excellent antibacterial properties and mechanical strength, preferably, processing and molding adopts extrusion molding. way, and the die head temperature is 190-195°C.

The present invention also provides an anti-mildew plastic, which is prepared by the above-mentioned method.

The present invention will be described in detail below by way of examples.

Example 1

1) Silica, asbestos, kaolin, zinc borate, platycodon grandiflorum, sophora japonica, artemisia, southern star, Huoxiang, toona bark, Guanzhong, trichaku, Chuantongpi, Schisandra, Jiuliming, Shanjiao, Maqian Seedlings and water are mixed according to 100:68:19:12:29:24:21:27:35:39:17:30:7:24:17:26:13:600 and then decocted at 150°C for 30 hours. Then filter to get the filter cake to make the antibacterial active substance;

2) Polyvinyl chloride (weight average molecular weight is 6000), ethylene-ethyl acrylate copolymer (weight average molecular weight is 10000), polyimide (weight average molecular weight is 5000), three (2,4-di-tert-butyl phenyl) phosphite, sodium lauramide ethyl sulfate, carbon nanotubes, zirconium phosphate, bamboo ketone, wollastonite fiber, vinyltrimethoxysilane and antibacterial active substances according to the ratio of 100:90:66:10 :25:9:17:19:17:60:53 Knead at 200°C for 5 hours, then extrude (die temperature at 193°C) to obtain anti-mildew plastic A1.

Example 2

1) Silica, asbestos, kaolin, zinc borate, platycodon grandiflorum, sophora japonica, artemisia, southern star, Huoxiang, toona bark, Guanzhong, trichaku, Chuantongpi, Schisandra, Jiuliming, Shanjiao, Maqian Seedlings and water are mixed according to the ratio of 100:50:17:9:23:21:17:25:31:36:14:27:4:21:14:24:10:500 and decocted at 140°C for 20 hours. Then filter to get the filter cake to make the antibacterial active substance;

2) Polyvinyl chloride (weight average molecular weight is 5000), ethylene-ethyl acrylate copolymer (weight average molecular weight is 9000), polyimide (weight average molecular weight is 3000), three (2,4-di-tert-butyl phenyl) phosphite, sodium lauramide ethyl sulfate, carbon nanotubes, zirconium phosphate, bamboo ketone, wollastonite fiber, vinyltrimethoxysilane and antibacterial active substances according to the ratio of 100:80:45:8 : 20: 7: 15: 17: 13: 50: 45 Mixed at 195°C for 4 hours, and then extruded (die temperature at 190°C) to obtain anti-mildew plastic A2.

Example 3

1) Silica, asbestos, kaolin, zinc borate, platycodon grandiflorum, sophora japonica, artemisia, southern star, Huoxiang, toona bark, Guanzhong, trichaku, Chuantongpi, Schisandra, Jiuliming, Shanjiao, Maqian Seedlings and water are mixed according to the ratio of 100:78:26:18:36:27:28:29:37:48:19:33:9:26:17:29:14:700 and decocted at 160°C for 40 hours. Then filter to get the filter cake to make the antibacterial active substance;

2) Polyvinyl chloride (weight average molecular weight is 8000), ethylene-ethyl acrylate copolymer (weight average molecular weight is 12000), polyimide (weight average molecular weight is 7000), three (2,4-di-tert-butyl phenyl) phosphite, sodium lauramide ethyl sulfate, carbon nanotubes, zirconium phosphate, bamboo ketone, wollastonite fiber, vinyltrimethoxysilane and antibacterial active substances according to the ratio of 100:110:76:12 : 27: 13: 19: 22: 20: 90: 56 Mixed at 210°C for 6 hours, and then extruded (die temperature: 195°C) to obtain anti-mildew plastic A3.

Comparative example 1

The anti-mildew plastic B1 was prepared according to the method of Example 1, except that Platycodon grandiflorum, Sophora japonica and Artemisia chinensis were not used in step 1).

Comparative example 2

The anti-mildew plastic B2 was prepared according to the method of Example 1, except that Nanxing, Huoxiang and Toon bark were not used in step 1).

Comparative example 3

The anti-mildew plastic B3 was obtained according to the method of Example 1, except that Guanzhong, Sanchaku, Chuantongpi and Schisandra were not used in step 1).

Comparative example 4

According to the method of Example 1, the anti-mildew plastic B4 was obtained, except that Jiuliming, Pinenail and Psigma chinensis were not used in the step 1).

Comparative example 5

According to the method of Example 1, the mildew-resistant plastic B5 was obtained, except that no antibacterial activator was used in step 2).

Test example 1

The anti-mildew plastics A1-A4 and B1-B5 were tested for tensile strength (σb/kN·m ^-1 ) and elongation at break (δ/%). The specific results are shown in Table 1.

Test example 2

Put the anti-mildew plastics A1-A4 and B1-B5 in an open environment at 30°C, and the air humidity is 8 grams of water/m ³ . After 10 days, the total number of colonies (n/ cfu·g ^-1 ), see Table 1 for specific results.

Table 1

σb/kN·m ^-1 δ/% n/cfu·g ^-1 A1 37.3 453 5 A2 37.2 455 6 A3 37.1 431 7 B1 29.8 324 13 B2 25.9 344 15 B3 26.5 337 18 B4 23.8 327 17 B5 19.5 279 twenty three

In the above test examples, the larger the values of tensile strength (σb/kN·m ^-1 ) and elongation at break (δ/%), the better the mechanical strength of the plastic, and the total number of colonies (n/cfu·g ^-1 ) The smaller the numerical value, the better the antibacterial effect of the plastic; therefore, it can be known that the plastic provided by the present invention has excellent mechanical strength and antibacterial performance.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention. These simple modifications All belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way if there is no contradiction. The combination method will not be described separately.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (9)

1. a preparation method of anti-mildew plastic, is characterized in that, described preparation method comprises: 1) Mixing silicon dioxide, asbestos, kaolin, zinc borate, Chinese herbal medicine and water, decocting, and then filtering to take the filter cake to obtain antibacterial activators; 2) Polyvinyl chloride, ethylene-ethyl acrylate copolymer, polyimide, tris (2,4-di-tert-butylphenyl) phosphite, sodium lauramide ethyl sulfate, carbon nanotubes, zirconium phosphate , bamboo leaf ketone, wollastonite fiber, vinyltrimethoxysilane and the antibacterial activator are mixed, and then processed and shaped to obtain mildew-resistant plastics; Wherein, the Chinese herbal medicine contains Platycodon grandiflorum, Sophora japonica, Artemisia chinensis, Southern star, Huoxiang, Toon bark, Guanzhong, Sanchaku, Chuantong bark, Schisandra chinensis, Jiuliming, Shanjiao and Sage chinensis. 2. The preparation method according to claim 1, wherein, in step 1), relative to the silicon dioxide of 100 parts by weight, the consumption of the asbestos is 50-78 parts by weight, and the consumption of the kaolin is 17-26 parts by weight, the amount of zinc borate is 9-18 parts by weight, the amount of platycodon grandiflorum is 23-36 parts by weight, the amount of Sophora japonica is 21-27 parts by weight, the amount of Artemisia It is 17-28 parts by weight, the consumption of described Nanxing is 25-29 parts by weight, the consumption of described Huoxiang is 31-37 parts by weight, the consumption of described Chinese toon bark is 36-48 parts by weight, the consumption of described Guanzhong The consumption is 14-19 parts by weight, the consumption of the three-fork bitterness is 27-33 parts by weight, the consumption of the chrysanthemum bark is 4-9 parts by weight, the consumption of the Schisandra chinensis is 21-26 parts by weight, the Jiuli The dosage of the powder is 14-17 parts by weight, the dosage of the mountain nail is 24-29 parts by weight, the dosage of the plantago is 10-14 parts by weight, and the dosage of the water is 500-700 parts by weight. 3. The preparation method according to claim 1 or 2, wherein the decocting at least satisfies the following conditions: the decocting temperature is 140-160°C, and the decocting time is 20-40h. 4. The preparation method according to claim 3, wherein, in step 2), relative to 100 parts by weight of the polyvinyl chloride, the amount of the ethylene-ethyl acrylate copolymer is 80-110 parts by weight, The consumption of described polyimide is 45-76 weight part, and the consumption of described tris (2,4-di-tert-butylphenyl) phosphite is 8-12 weight part, and described sodium lauramide ethyl sulfate The consumption of the carbon nanotubes is 20-27 parts by weight, the consumption of the carbon nanotubes is 7-13 parts by weight, the consumption of the zirconium phosphate is 15-19 parts by weight, and the consumption of the bamboo leaf ketone is 17-22 parts by weight , the consumption of the wollastonite fiber is 13-20 parts by weight, the consumption of the vinyltrimethoxysilane is 50-90 parts by weight, and the consumption of the antibacterial activator is 45-56 parts by weight. 5. The preparation method according to claim 4, wherein, the weight average molecular weight of the polyvinyl chloride is 5000-8000, the weight average molecular weight of the ethylene-ethyl acrylate copolymer is 9000-12000, and the polyamide The weight average molecular weight of the imine is 3000-7000. 6. The preparation method according to claim 4, wherein the particle size of the carbon nanotubes is 10-20 nm. 7. The preparation method according to any one of claims 4-6, wherein the mixing at least satisfies the following conditions: the mixing temperature is 195-210°C, and the mixing time is 4-6h. 8. The preparation method according to claim 7, wherein the processing and molding is carried out by extrusion molding, and the temperature of the die head is 190-195°C. 9. An anti-mildew plastic, characterized in that the anti-mildew plastic is prepared by the method according to any one of claims 1-8.