CN111808396A - Antibacterial plastic and preparation method thereof - Google Patents

Antibacterial plastic and preparation method thereof Download PDF

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CN111808396A
CN111808396A CN202010689392.2A CN202010689392A CN111808396A CN 111808396 A CN111808396 A CN 111808396A CN 202010689392 A CN202010689392 A CN 202010689392A CN 111808396 A CN111808396 A CN 111808396A
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copper
antibacterial plastic
antibacterial
nano tio
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陈玺雅
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Zhejiang Wangshi Technology Co Ltd
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Zhejiang Wangshi Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
    • C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • 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
    • C08K3/02—Elements
    • C08K3/08—Metals
    • 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
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/12—Adsorbed ingredients, e.g. ingredients on carriers
    • 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
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0806—Silver
    • 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
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/085—Copper
    • 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

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention relates to the field of macromolecules, and particularly discloses an antibacterial plastic and a preparation method thereof. The antibacterial plastic is prepared from the following raw materials in parts by weight: 75-87 parts of ABS and copper-loaded nano TiO25-9 parts of silane coupling agent, 3-5 parts of silane coupling agent, 2-2.5 parts of dispersing agent and stabilizer2.5-4 parts of a fixing agent and 1.5-2.8 parts of an antioxidant. The antibacterial plastic has the advantages of strong inhibition of bacteria and fungi, lasting effect, low cost and the like. In addition, the invention also provides a preparation method of the antibacterial plastic, and the preparation method has the advantage of simple operation.

Description

Antibacterial plastic and preparation method thereof
Technical Field
The invention relates to the field of macromolecules, in particular to antibacterial plastic and a preparation method thereof.
Background
Various products made of plastics have been widely used in various aspects of people's life and work due to their characteristics of light weight, excellent chemical stability, excellent electrical insulation, and the like.
ABS (acrylonitrile-butadiene-styrene) resin is an important general synthetic resin, mainly a blend or terpolymer of acrylonitrile, butadiene and styrene, which is a tough and rigid thermoplastic. The application range is very wide, the automobile industry is commonly used for manufacturing automobile parts such as instrument panels, outer vehicle body panels, inner decorative panels, steering wheels, sound insulation panels, door locks, bumpers, ventilation pipes and the like, the household appliance industry is commonly used for manufacturing shells of refrigerators, televisions, washing machines, vacuum cleaners, food stirrers, telephones and the like, the building decoration industry is commonly used for manufacturing daily necessities such as sanitary wares, swimming pool linings, pipes, pipe fittings and the like, and in life, the automobile industry is also used for manufacturing daily necessities such as safety helmets, motorcycle baffles, heels, snow sports goods, toys, clocks, loudspeaker shells, suitcases, buttons, cosmetic boxes, plastic barrels, trays and the like, and advertising goods such as nameplates, trays and the like.
Various microorganisms exist in nature, and in daily life, the microorganisms are closely related to people, and part of bacteria, fungi, viruses and the like as pathogenic bacteria seriously harm the health of human beings and even endanger life. Plastic articles inevitably become contaminated and colonized with various bacteria and fungi after a long period of use, and these articles often come into contact with human bodies or food, thus posing a health hazard to humans. In order to avoid cross-infection caused by contact, the development of antibacterial plastics is of great practical significance to the reduction of pathogen transmission.
At present, antibacterial plastic is usually prepared by adding an antibacterial agent into plastic to realize an antibacterial function. The existing antibacterial material comprises an inorganic antibacterial agent and an organic antibacterial agent, wherein the inorganic antibacterial agent is most widely applied to nano silver particles, and the organic antibacterial agent comprises quaternary ammonium salt, natural antibacterial extract and the like. However, these organic or inorganic antibacterial agents have problems of high cost, unstable antibacterial effect, poor antibacterial durability, and single functionality.
Therefore, development of an ABS plastic that is inexpensive, excellent in antibacterial effect, and durable has been desired.
Disclosure of Invention
In view of the problem of the prior art that ABS plastic is insufficient in strength, a first object of the present invention is to provide an antibacterial plastic which has the advantages of strong inhibition of bacteria and fungi, long-lasting efficacy, low cost, etc.
The second purpose of the invention is to provide a preparation method of the antibacterial plastic, which has the advantage of simple operation.
In order to achieve the first object, the invention provides the following technical scheme:
an antibacterial plastic is prepared from the following raw materials in parts by weight:
Figure BDA0002588744670000021
in the antibacterial plastic according to the invention, copper-loaded nano TiO is adopted2As an antibacterial agent, can exhibit very excellent and durable ability to inhibit bacteria and fungi, and the copper-loaded nano TiO2The cost of the silver ion is also greatly lower than that of the nano silver ion commonly used in the field.
Further, the copper-loaded nano TiO2The preparation method comprises the following steps:
(1) dissolving copper sulfate, sodium potassium tartrate and EDTA disodium salt in water to prepare a negative carrier liquid, wherein the negative carrier liquid comprises 15-20 g/L of copper sulfate and 17-22 g/L, EDTA g/L of sodium potassium tartrate, and 20-25 g/L of disodium salt;
(2) nano TiO with the weight ratio of (0.75-1.2) to 102Mixing the mixture with the load liquid, and standing for 3-5 minutes;
(3) and (3) adding trioxymethylene into the obtained product in the step (2), adjusting the pH to 12-13 by using a 10-20 wt% NaOH solution, then stirring at a speed of 75-80 rpm for 15-20 minutes, then stirring at a speed of 35-40 rpm for 7-10 minutes, and filtering, wherein the weight ratio of the trioxymethylene to the negative carrier liquid is (2.5-3.2): 10.
In the present invention, nano TiO is first mixed2Immersing in load liquid to make it fully adsorb the load liquid, adding trioxymethylene, and reducing copper ions in alkaline environment to obtain the product2The surface is chemically plated with a copper metal layer. In the chemical plating process, firstly stirring at a higher stirring speed, wherein the chemical plating process is not carried out yet and is started after a certain time interval, the stirring can promote the hydrolysis of trioxymethylene and shorten the inoculation time to prepare for the subsequent chemical plating process, and then stirring at a lower stirring speedStirring at a stirring speed, so that the concentration of copper ions in a reaction system can be kept balanced, and the copper ions can be loaded on the nano TiO2The copper metal layer on the surface is rough and has large surface area, so that the antibacterial activity is stronger. And, nano TiO2The activity of copper carrier can be improved, and the antibacterial property can be further improved.
The nano TiO2The particle size of (B) may be 35 to 80nm, preferably 45 to 60 nm.
Further, the copper-loaded nano TiO2The preparation method of (2) further comprises, before the step of (2): mixing nanometer TiO2Washing with 3-5% dilute sulfuric acid for 10-15 seconds, washing with water for 2-3 times, and drying.
Through the pretreatment process, the nano TiO can be cleaned2Impurities on the surface, thereby being more beneficial to the loading of copper.
Further, the copper-loaded nano TiO2The preparation method of (2) further comprises, after the step (3):
(4) immersing the obtained substance in the step (3) into AgNO with the concentration of 75-90 g/L3The solution is added for 7-10 seconds, then filtered and washed for 2-3 times by water, wherein the obtained substance in the step (3) and the AgNO3The weight ratio of the solution is (0.9-1.2): 10.
By immersion in AgNO3In the solution, the copper-loaded nano TiO can be added2A small amount of copper metal on the surface is replaced by silver metal, so that the antibacterial action of the copper is greatly activated, the mutual promotion and the synergistic effect are realized, besides the antibacterial action of the silver.
The silane coupling agent is selected from KH560 or KH 550.
The dispersing agent is selected from liquid paraffin, glyceryl tristearate, polyethylene wax or polystyrene wax.
The stabilizer is selected from calcium stearate or zinc stearate.
The antioxidant is selected from N, N-diphenyl-p-phenylenediamine or di-tert-butyl-methylphenol.
The second purpose of the invention is to provide a preparation method of the antibacterial plastic, which comprises the following steps:
(a) ABS and copper-loaded nano-particlesTiO2Uniformly mixing the silane coupling agent, the dispersing agent, the stabilizing agent and the antioxidant to obtain a mixture;
(b) and melting and blending the mixture at 215-235 ℃, and extruding and granulating to obtain the antibacterial plastic.
In conclusion, the invention has the following beneficial effects:
1. the formula of the invention is added with copper-loaded nano TiO2It can exhibit very excellent and long-lasting ability to inhibit bacteria and fungi, and also at a cost much lower than the nano silver ions commonly used in the art.
2. Except for utilizing the antibacterial and bacteriostatic action of copper metal, the carrier thereof is nano TiO2The activity of copper carrier can be improved, and the antibacterial property can be further improved. In addition, the invention also provides copper-loaded nano TiO2A small amount of copper metal on the surface is replaced by silver metal, so that the antibacterial action of the copper is greatly activated, the mutual promotion and the synergistic effect are realized, besides the antibacterial action of the silver.
3. The copper-loaded nano TiO2The ABS plastic can be used as a reinforcing filler to increase the mechanical strength of the ABS matrix and further improve the effect of improving the strength of the plastic.
4. The preparation method of the bacterial plastic is simple to operate and easy to implement.
Detailed Description
The present invention will be described in further detail with reference to examples and comparative examples.
Example 1
An antimicrobial plastic prepared by a process comprising:
(a) 81g of ABS and 7g of copper-loaded nano TiO24g of silane coupling agent, 2.2g of dispersing agent, 3.3g of stabilizing agent and 2.2g of antioxidant are mixed uniformly to obtain a mixture;
(b) the blend was melt blended at 225 ℃ and extrusion pelletized.
Wherein the copper-loaded nano TiO2The preparation method comprises the following steps:
(0) nano TiO with the grain diameter of 50-60 nm2Washing with 4% dilute sulfuric acid for 12 secondsThen washing with water for 2 times, and drying;
(1) dissolving copper sulfate, sodium potassium tartrate and disodium EDTA in water to prepare a negative carrier liquid, wherein the negative carrier liquid comprises 17g/L of copper sulfate and 22g/L of disodium potassium tartrate/L, EDTA;
(2) mixing nano TiO with the weight ratio of 1:102Mixing the mixture with the negative carrier liquid, and standing for 4 minutes;
(3) and (3) adding trioxymethylene into the obtained product in the step (2), adjusting the pH to 12 by using a 15 wt% NaOH solution, stirring at 77rpm for 17 minutes, stirring at 38rpm for 8 minutes, and filtering, wherein the weight ratio of trioxymethylene to the negative carrier liquid is 2.8: 10.
The silane coupling agent adopts KH560, the dispersing agent adopts glyceryl tristearate, the stabilizing agent adopts calcium stearate, and the antioxidant adopts di-tert-butyl methyl phenol.
Thus, the antibacterial plastic according to the present invention was prepared.
Example 2
An antimicrobial plastic prepared by a process comprising:
(a) 75g of ABS and 9g of copper-loaded nano TiO23g of silane coupling agent, 2.5g of dispersing agent, 2.5g of stabilizing agent and 2.8g of antioxidant are mixed uniformly to obtain a mixture;
(b) the blend was melt blended at 215 ℃ and extrusion granulated.
Wherein the copper-loaded nano TiO2The preparation method comprises the following steps:
(0) nano TiO with the particle size of 45-55 nm2Washing with 3% dilute sulfuric acid for 15 s, washing with water for 2 times, and drying;
(1) dissolving copper sulfate, sodium potassium tartrate and disodium EDTA in water to prepare a negative carrier liquid, wherein the negative carrier liquid comprises 20g/L of copper sulfate and 24g/L of disodium salt of 18g/L, EDTA g/L of sodium potassium tartrate;
(2) mixing nano TiO with the weight ratio of 1.2:102Mixing the mixture with the load solution, and standing for 5 minutes;
(3) and (3) adding trioxymethylene into the obtained product in the step (2), adjusting the pH to 12 by using a 10 weight percent NaOH solution, stirring at a speed of 80rpm for 15 minutes, stirring at a speed of 40rpm for 7 minutes, and filtering, wherein the weight ratio of the trioxymethylene to the negative carrier liquid is 2.5: 10.
The silane coupling agent adopts KH560, the dispersing agent adopts liquid paraffin, the stabilizing agent adopts calcium stearate, and the antioxidant adopts di-tert-butyl methyl phenol.
Thus, the antibacterial plastic according to the present invention was prepared.
Example 3
An antimicrobial plastic prepared by a process comprising:
(a) 87g of ABS and 5g of copper-loaded nano TiO25g of silane coupling agent, 2g of dispersing agent, 4g of stabilizing agent and 1.5g of antioxidant are mixed uniformly to obtain a mixture;
(b) the blend was melt blended at 235 ℃ and extrusion pelletized.
Wherein the copper-loaded nano TiO2The preparation method comprises the following steps:
(0) nano TiO with the grain diameter of 60-70 nm2Washing with 5% dilute sulfuric acid for 13 s, then washing with water for 3 times, and drying;
(1) dissolving copper sulfate, sodium potassium tartrate and disodium EDTA in water to prepare a negative carrier liquid, wherein the negative carrier liquid comprises 15g/L copper sulfate and 20g/L disodium potassium tartrate 19g/L, EDTA;
(2) mixing nano TiO with the weight ratio of 0.85:102Mixing the mixture with the load solution, and standing for 3 minutes;
(3) and (3) adding trioxymethylene into the obtained product in the step (2), adjusting the pH to 13 by using a 20 wt% NaOH solution, stirring at the speed of 75rpm for 20 minutes, stirring at the speed of 35rpm for 10 minutes, and filtering, wherein the weight ratio of trioxymethylene to the negative carrier liquid is 3.2: 10.
The silane coupling agent is KH560, the dispersing agent is glyceryl tristearate, the stabilizing agent is zinc stearate, and the antioxidant is N, N-diphenyl-p-phenylenediamine.
Thus, the antibacterial plastic according to the present invention was prepared.
Example 4
An antimicrobial plastic prepared by a process comprising:
(a) 75g of ABS and 5g of copper-loaded nano TiO25g of silane coupling agent, 2.5g of dispersing agent, 2.5g of stabilizing agent and 1.5g of antioxidant are mixed uniformly to obtain a mixture;
(b) the blend was melt blended at 220 ℃ and extrusion pelletized.
Wherein the copper-loaded nano TiO2The preparation method comprises the following steps:
(0) nano TiO with the grain diameter of 70-80 nm2Washing with 5% dilute sulfuric acid for 15 s, washing with water for 3 times, and drying;
(1) dissolving copper sulfate, sodium potassium tartrate and disodium EDTA in water to prepare a negative carrier liquid, wherein the negative carrier liquid comprises 16g/L copper sulfate and 21g/L disodium potassium tartrate/L, EDTA;
(2) mixing nano TiO with the weight ratio of 0.75:102Mixing the mixture with the load solution, and standing for 5 minutes;
(3) and (3) adding trioxymethylene into the obtained product in the step (2), adjusting the pH to 13 by using a 12 wt% NaOH solution, stirring at a speed of 75rpm for 15 minutes, stirring at a speed of 35rpm for 9 minutes, and filtering, wherein the weight ratio of trioxymethylene to the negative carrier liquid is 2.6: 10.
The silane coupling agent adopts KH550, the dispersing agent adopts polystyrene wax, the stabilizing agent adopts calcium stearate, and the antioxidant adopts di-tert-butyl methyl phenol.
Thus, the antibacterial plastic according to the present invention was prepared.
Example 5
An antimicrobial plastic prepared by a process comprising:
(a) 87g of ABS and 9g of copper-loaded nano TiO23g of silane coupling agent, 2g of dispersing agent, 4g of stabilizing agent and 2.8g of antioxidant are mixed uniformly to obtain a mixture;
(b) the blend was melt blended at 230 ℃ and extrusion granulated.
Wherein the copper-loaded nano TiO2The preparation method comprises the following steps:
(0) nano TiO with the particle size of 35-45 nm2Washing with 3% dilute sulfuric acid for 10 s, washing with water for 2 times, and drying;
(1) dissolving copper sulfate, sodium potassium tartrate and disodium EDTA in water to prepare a negative carrier liquid, wherein the negative carrier liquid comprises 20g/L of copper sulfate and 25g/L of disodium salt of 17g/L, EDTA g/L of sodium potassium tartrate;
(2) mixing nano TiO with the weight ratio of 1.1:102Mixing the mixture with the negative carrier liquid, and standing for 4 minutes;
(3) and (3) adding trioxymethylene into the obtained product in the step (2), adjusting the pH to 12 by using a 18 weight percent NaOH solution, stirring at a speed of 80rpm for 20 minutes, stirring at a speed of 40rpm for 10 minutes, and filtering, wherein the weight ratio of trioxymethylene to the negative carrier liquid is 3.0: 10.
The silane coupling agent is KH550, the dispersing agent is polyethylene wax, the stabilizing agent is zinc stearate, and the antioxidant is N, N-diphenyl-p-phenylenediamine.
Thus, the antibacterial plastic according to the present invention was prepared.
Example 6
Except that the copper-loaded nano TiO2The antibacterial plastic according to the present invention was prepared in the same manner as in example 1, except that the following steps were further included after step (3):
(4) immersing the resultant of step (3) in AgNO at a concentration of 75g/L310 seconds in solution, then filtered and washed 2 times with water, wherein the result of step (3) is mixed with said AgNO3The weight ratio of the solution was 1.2: 10.
Example 7
Except that the copper-loaded nano TiO2The antibacterial plastic according to the present invention was prepared in the same manner as in example 1, except that the following steps were further included after step (3):
(4) immersing the resultant of step (3) in AgNO with a concentration of 90g/L3In solution for 7 secondsThen filtered and washed 3 times with water, wherein the result of step (3) is reacted with said AgNO3The weight ratio of the solution was 0.9: 10.
Comparative example 1
Except for adopting common nano TiO2(particle size of 50-60 nm) instead of copper-loaded nano TiO2Except that, an antibacterial plastic was prepared in the same manner as in example 1.
Comparative example 2
The antibacterial plastic is prepared by adopting the following method:
(a) 87g of ABS and 7g of nano TiO2Uniformly mixing 2g of nano silver (the particle diameter is 50-60 nm), 3g of silane coupling agent, 2g of dispersing agent, 4g of stabilizing agent and 2.8g of antioxidant to obtain a mixture;
(b) the blend was melt blended at 230 ℃ and extrusion granulated.
Comparative example 3
The antibacterial plastic is prepared by adopting the following method:
(a) 87g of ABS and 7g of nano TiO2Uniformly mixing 2g of nano copper (the particle diameter is 50-60 nm), 3g of silane coupling agent, 2g of dispersing agent, 4g of stabilizing agent and 2.8g of antioxidant to obtain a mixture;
(b) the blend was melt blended at 230 ℃ and extrusion granulated.
Comparative example 4
An antibacterial plastic was produced in the same manner as in example 1, except that the second stirring speed in step (3) was 25 rpm.
Comparative example 5
An antibacterial plastic was produced in the same manner as in example 1, except that the second stirring speed in step (3) was 50 rpm.
Performance detection
The plastic samples prepared in examples 1 to 7 and comparative examples 1 to 5 were used for the antibacterial property test.
1. Testing the antibacterial performance according to the test method in GB/T31402-2015 Plastic surface antibacterial performance test method;
2. the antifungal performance was tested according to the test method in GB/T24128-2009 test methods for mildew resistance in plastics.
The test results are shown in Table 1.
TABLE 1 test results for antimicrobial plastic samples
Figure BDA0002588744670000091
As is clear from Table 1, the antibacterial plastics of examples 1 to 5 were found to have an average number of viable bacteria not detected after 24 hours, an extremely high antibacterial ratio, and a mildewproof rating of the highest rating of 0. Also, examples 6 and 7 supported copper nano TiO2A small amount of copper metal on the surface is replaced by silver metal, so that the average viable count is not detected after 24 hours, and the antibacterial rate is further improved besides the highest grade 0 mildew-proof grade.
In contrast, comparative example 1 does not add an antibacterial ingredient, so that the growth of bacteria and fungi cannot be avoided. Comparative example 2 separately adding nano silver and TiO2The antibacterial efficacy is slightly inferior to the examples, and the cost is higher than the present invention. Comparative example 3 employs nano copper as an antibacterial agent, which is less effective than nano silver. Comparative examples 4 and 5 on nano TiO2The stirring speed outside the limited range of the invention is adopted in the copper plating process, so that the copper-loaded nano TiO2The antibacterial activity of (b) is decreased.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (10)

1. The antibacterial plastic is characterized by being prepared from the following raw materials in parts by weight:
Figure FDA0002588744660000011
2. the antimicrobial plastic of claim 1, wherein the copper-loaded nano TiO2The preparation method comprises the following steps:
(1) dissolving copper sulfate, sodium potassium tartrate and EDTA disodium salt in water to prepare a negative carrier liquid, wherein the negative carrier liquid comprises 15-20 g/L of copper sulfate and 17-22 g/L, EDTA g/L of sodium potassium tartrate, and 20-25 g/L of disodium salt;
(2) nano TiO with the weight ratio of (0.75-1.2) to 102Mixing the mixture with the load liquid, and standing for 3-5 minutes;
(3) and (3) adding trioxymethylene into the obtained product in the step (2), adjusting the pH to 12-13 by using a 10-20 wt% NaOH solution, then stirring at a speed of 75-80 rpm for 15-20 minutes, then stirring at a speed of 35-40 rpm for 7-10 minutes, and filtering, wherein the weight ratio of the trioxymethylene to the negative carrier liquid is (2.5-3.2): 10.
3. Antibacterial plastic according to claim 2, characterized in that the nano TiO is2The particle size of the (B) is 35-80 nm.
4. Antibacterial plastic according to claim 2, characterized in that the copper-loaded nano TiO2The preparation method of (2) further comprises, before the step of (2): mixing nanometer TiO2Washing with 3-5% dilute sulfuric acid for 10-15 seconds, washing with water for 2-3 times, and drying.
5. Antibacterial plastic according to claim 2, characterized in that the copper-loaded nano TiO2The preparation method of (2) further comprises, after the step (3):
(4) immersing the obtained substance in the step (3) into AgNO with the concentration of 75-90 g/L3The solution is added for 7-10 seconds, then filtered and washed for 2-3 times by water, wherein the obtained substance in the step (3) and the AgNO3The weight ratio of the solution is (0.9-1.2): 10.
6. Antibacterial plastic according to claim 1, characterized in that the silane coupling agent is selected from KH560 or KH 550.
7. Antibacterial plastic according to claim 1, characterized in that the dispersant is selected from liquid paraffin, glyceryl tristearate, polyethylene wax or polystyrene wax.
8. Antibacterial plastic according to claim 1, characterized in that the stabilizer is selected from calcium stearate or zinc stearate.
9. Antibacterial plastic according to claim 1, characterized in that the antioxidant is selected from N, N-diphenyl-p-phenylenediamine or di-tert-butyl-methylphenol.
10. A process for the preparation of an antimicrobial plastic according to any one of claims 1 to 9, comprising the steps of:
(a) ABS and copper-loaded nano TiO2Uniformly mixing the silane coupling agent, the dispersing agent, the stabilizing agent and the antioxidant to obtain a mixture;
(b) and melting and blending the mixture at 215-235 ℃, and extruding and granulating to obtain the antibacterial plastic.
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CN108752845A (en) * 2018-06-20 2018-11-06 安徽江淮汽车集团股份有限公司 A kind of wear-resisting ABS composite material of antibacterial and preparation method thereof
CN110746736A (en) * 2019-10-29 2020-02-04 三菱电机(中国)有限公司 Preparation of composite antibacterial ABS material

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