CN115530182A - Antibacterial modified methanol-rich material and preparation process thereof - Google Patents

Antibacterial modified methanol-rich material and preparation process thereof Download PDF

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Publication number
CN115530182A
CN115530182A CN202211237229.8A CN202211237229A CN115530182A CN 115530182 A CN115530182 A CN 115530182A CN 202211237229 A CN202211237229 A CN 202211237229A CN 115530182 A CN115530182 A CN 115530182A
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parts
antibacterial
titanium dioxide
nano titanium
compound
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黎铭
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Xiamen Yongjinhong Plastic Industry Co ltd
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Xiamen Yongjinhong Plastic Industry Co ltd
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/16—Heavy metals; Compounds thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
    • A01N33/02—Amines; Quaternary ammonium compounds
    • A01N33/12—Quaternary ammonium compounds
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N35/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical
    • A01N35/02—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing aliphatically bound aldehyde or keto groups, or thio analogues thereof; Derivatives thereof, e.g. acetals
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A01N65/08—Magnoliopsida [dicotyledons]
    • A01N65/12—Asteraceae or Compositae [Aster or Sunflower family], e.g. daisy, pyrethrum, artichoke, lettuce, sunflower, wormwood or tarragon
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A01N65/08—Magnoliopsida [dicotyledons]
    • A01N65/20—Fabaceae or Leguminosae [Pea or Legume family], e.g. pea, lentil, soybean, clover, acacia, honey locust, derris or millettia
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P1/00—Disinfectants; Antimicrobial compounds or mixtures thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Abstract

The application relates to the technical field of plastic processing, and particularly discloses an antibacterial modified methanol material and a preparation process thereof. The antibacterial modified polymethyl alcohol material comprises the following raw materials in parts by weight: 80-120 parts of polyformaldehyde, 1-5 parts of a dispersing agent, 6-15 parts of zinc oxide, 8-20 parts of a peanut shell extract, 15-30 parts of an antibacterial liquid and 5-12 parts of a compound, wherein the compound is prepared by compounding dodecyl dimethyl benzyl ammonium chloride and nano titanium dioxide; the preparation method comprises the following steps: uniformly mixing polyformaldehyde, a dispersing agent, zinc oxide, a peanut shell extract and a compound, melting, granulating to obtain a semi-finished product, soaking the semi-finished product in an antibacterial liquid, taking out, and drying to obtain the antibacterial modified polymethyl methacrylate material. The antibacterial modified polymethyl alcohol material has the advantage of improving antibacterial property of the polymethyl alcohol material through the synergistic effect of the raw materials.

Description

Antibacterial modified methanol material and preparation process thereof
Technical Field
The application relates to the technical field of plastic processing, in particular to an antibacterial modified polymethyl alcohol material and a preparation process thereof.
Background
In recent years, with the improvement of living standard and the enhancement of health consciousness of people, the demand for various antibacterial material products is increasing, wherein the antibacterial plastic products account for a large proportion, and various living products including refrigerators, air conditioners, various food containers, toy products, dust collectors, washing machines and the like use various thermoplastic antibacterial plastics, and the antibacterial polymethyl alcohol is one of the thermoplastic antibacterial plastics.
The polymethyl alcohol is one of synthetic resins, is also called as polyformaldehyde resin, POM plastic and the like, is white or black plastic particles, has the characteristics of high hardness, high rigidity and high wear resistance, is mainly used for products which play a skeleton role, such as gears, bearings, automobile parts, machine tools and the like, and has to be improved in antibacterial property.
Disclosure of Invention
In order to improve the antibacterial property of the polymethyl alcohol, the application provides an antibacterial modified polymethyl alcohol material and a preparation process thereof.
In a first aspect, the application provides an antibacterial modified poly-methanol material, which adopts the following technical scheme:
an antibacterial modified polymethyl alcohol material comprises the following raw materials in parts by weight: 80-120 parts of polyformaldehyde, 1-5 parts of a dispersing agent, 6-15 parts of zinc oxide, 8-20 parts of a peanut shell extract, 15-30 parts of an antibacterial liquid and 5-12 parts of a compound, wherein the compound is prepared by compounding dodecyl dimethyl benzyl ammonium chloride and nano titanium dioxide.
By adopting the technical scheme, the antibacterial modified polymethyl alcohol material improves the antibacterial effect of the polymethyl alcohol material and the antibacterial rate of the polymethyl alcohol material to escherichia coli and staphylococcus aureus through the synergistic effect of the raw materials, wherein the antibacterial rate to escherichia coli is 95.8-99.8%, and the antibacterial rate to staphylococcus aureus is 95.7-99.5%.
The polyformaldehyde is used as a basic component, and the dispersing agent can enable all raw materials to be dispersed more uniformly. The zinc oxide can interact with cell walls on the surface of the bacteria to destroy the cell walls of the bacteria, so that the contents in the bacteria are released, thereby killing the bacteria. The peanut shell extract contains flavone which can destroy the integrity of bacterial cell walls and cell membranes, so that intracellular components are released to cause dysfunction of membrane such as electron transfer, nutrient absorption, nucleotide synthesis and the like, thereby inhibiting bacterial growth. The antibacterial liquid can also enhance the antibacterial effect of the methanol material.
The compound is compounded by dodecyl dimethyl benzyl ammonium chloride and nano titanium dioxide. The dodecyl dimethyl benzyl ammonium chloride can adsorb bacteria, invade cell walls, combine with cell membranes, influence the metabolism of the bacteria, cause the death of the bacteria, and have an antibacterial effect. The nano titanium dioxide can decompose bacteria under the action of photocatalysis to achieve the antibacterial effect. The dodecyl dimethyl benzyl ammonium chloride and the nano titanium dioxide are compounded, so that the dodecyl dimethyl benzyl ammonium chloride is grafted to the surface of the nano titanium dioxide to form long-chain alkyl quaternary ammonium salt, and the antibacterial effect is further enhanced and the antibacterial property of the polymethyl alcohol material can be improved through the synergistic effect of the dodecyl dimethyl benzyl ammonium chloride and the nano titanium dioxide.
Preferably, the method comprises the following steps: the feed comprises the following raw materials in parts by weight: 90-110 parts of polyformaldehyde, 2-4 parts of a dispersing agent, 8-12 parts of zinc oxide, 12-16 parts of a peanut shell extract, 18-26 parts of an antibacterial liquid and 7-10 parts of a compound.
By adopting the technical scheme, the addition amounts of the polyformaldehyde, the dispersing agent, the zinc oxide, the peanut shell extract, the antibacterial liquid and the compound are optimized, and the antibacterial property of the methanol material is improved.
Preferably, the method comprises the following steps: the compound is prepared by the following method: placing dodecyl dimethyl benzyl ammonium chloride into absolute ethyl alcohol, adding nano titanium dioxide, uniformly mixing, introducing nitrogen, heating and refluxing under the protection of nitrogen, filtering after the reaction is finished, extracting, and drying to obtain the compound.
Further, the compound is prepared by the following method: placing dodecyl dimethyl benzyl ammonium chloride into absolute ethyl alcohol, adding nano titanium dioxide, stirring for 20-30min, introducing nitrogen, heating to 60-80 ℃ under the protection of nitrogen, carrying out reflux reaction for 5-7h, filtering after the reaction is finished, extracting for 20-26h by using an ethanol solution, taking out and drying to obtain a compound;
wherein, the addition amount of the absolute ethyl alcohol in each 1g of the dodecyl dimethyl benzyl ammonium chloride is 4-6mL, and the mass fraction of the ethyl alcohol solution is 60-80%.
By adopting the technical scheme and utilizing the preparation method to prepare the compound, the dodecyl dimethyl benzyl ammonium chloride can be successfully grafted to the surface of the nano titanium dioxide, and the antibacterial effect of the polymethyl alcohol material is further improved through the synergistic effect of the dodecyl dimethyl benzyl ammonium chloride and the nano titanium dioxide.
Preferably, the method comprises the following steps: the weight ratio of the dodecyl dimethyl benzyl ammonium chloride to the nano titanium dioxide is 1: (0.2-0.4).
The addition amount of the nano titanium dioxide is too small, so that dodecyl dimethyl benzyl ammonium chloride cannot be grafted on the surface of the nano titanium dioxide well, and the dodecyl dimethyl benzyl ammonium chloride and the nano titanium dioxide cannot play a better synergistic effect and a better antibacterial effect; the addition amount of the nano titanium dioxide is too much, so that agglomeration is easily caused, and the function of the nano titanium dioxide is influenced. By adopting the technical scheme, when the weight ratio of the nano titanium dioxide to the dodecyl dimethyl benzyl ammonium chloride is in the range, the nano titanium dioxide and the dodecyl dimethyl benzyl ammonium chloride can exert a better synergistic effect, so that the antibacterial property of the polymethyl alcohol material is better improved.
Preferably, the method comprises the following steps: the nano titanium dioxide is pretreated by adopting the following method before use: and (3) putting the nano titanium dioxide into an ethanol solution, adding a silane coupling agent, uniformly mixing, filtering, washing and drying to obtain the pretreated nano titanium dioxide.
Further, the nano titanium dioxide is pretreated by adopting the following method before use: putting the nano titanium dioxide into an ethanol solution, adding a silane coupling agent, stirring for 10-20min, filtering, washing for 3-5 times by using water, and drying to obtain pretreated nano titanium dioxide;
wherein, the addition amount of the ethanol solution in each 1g of the nano titanium dioxide is 4-6mL, the mass fraction of the ethanol solution is 70-90%, and the weight ratio of the nano titanium dioxide to the silane coupling agent is 1: (0.2-0.4).
By adopting the technical scheme, the specific surface energy of the surface of the nano titanium dioxide is large, self-agglomeration is easy to generate, the nano titanium dioxide is dispersed unevenly, so that the excellent effect cannot be exerted, the nano titanium dioxide is pretreated by using the silane coupling agent, the agglomeration can be reduced, the dispersibility is improved, and the antibacterial property of the polymethyl alcohol material can be improved better.
Preferably, the method comprises the following steps: the peanut shell extract is prepared by the following method: cleaning peanut shells, putting the peanut shells into an ethanol solution, uniformly mixing, and performing ultrasonic extraction to obtain a peanut shell extract.
Further, the peanut shell extract is prepared by the following method: cleaning peanut shell with water, adding into ethanol solution, stirring for 5-10min, and extracting at power of 100-140W, frequency of 30-50Kz and temperature of 50-60 deg.C for 30-40min to obtain peanut shell extract;
wherein the addition amount of the ethanol solution in every 1g of peanut shell is 20-40mL, and the mass fraction of the ethanol solution is 60-80%.
By adopting the technical scheme, the peanut shell extract is extracted by the method, the extraction time can be greatly shortened by ultrasonic assistance, and the extraction rate is higher.
Preferably, the method comprises the following steps: the antibacterial liquid is prepared by the following method: mixing and crushing safflower, mugwort, dandelion and vanilla, adding an ethanol solution for extraction, filtering, collecting a first filtrate, adding the ethanol solution into filter residues again for extraction, filtering, collecting a second filtrate, and combining the first filtrate and the second filtrate to obtain the antibacterial liquid.
Further, the antibacterial liquid is prepared by the following method: mixing safflower, mugwort, dandelion and vanilla, crushing to 100 meshes, adding an ethanol solution to extract for 5-7d, filtering, collecting a first filtrate, adding the ethanol solution to filter residue again to extract, filtering, collecting a second filtrate, and mixing the first filtrate and the second filtrate to obtain an antibacterial solution;
wherein the weight ratio of the total weight of the safflower, the mugwort, the dandelion and the vanilla to the weight of the ethanol solution added each time is 1: (15-30), the mass fraction of the ethanol solution is 70-80%.
By adopting the technical scheme and utilizing the preparation method to prepare the antibacterial liquid, the antibacterial substances in the safflower, the mugwort, the dandelion and the vanilla can be well extracted, and the antibacterial property of the polymethyl alcohol material can be conveniently improved.
In a second aspect, the application provides a preparation process of an antibacterial modified methanol material, which adopts the following technical scheme: a preparation process of an antibacterial modified methanol material comprises the following steps:
uniformly mixing polyformaldehyde, a dispersing agent, zinc oxide, a peanut shell extract and a compound, melting, granulating to obtain a semi-finished product, soaking the semi-finished product in an antibacterial liquid, taking out, and drying to obtain the antibacterial modified polymethyl methacrylate material.
Further, mixing polyformaldehyde, a dispersing agent, zinc oxide, a peanut shell extract and a compound, stirring for 5-10min, melting at 170-185 ℃, granulating to obtain a semi-finished product, soaking the semi-finished product in an antibacterial liquid for 25-40h, taking out, and drying to obtain the antibacterial modified polymethyl alcohol material.
By adopting the technical scheme, firstly, the semi-finished product is prepared by utilizing the methanol, the dispersant, the zinc oxide, the peanut shell extract and the compound, and then the semi-finished product is soaked in the antibacterial liquid, so that the antibacterial effect is further improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the application, the dodecyl dimethyl benzyl ammonium chloride and the nano titanium dioxide are jointly used as the compound, and the antibacterial property of the polymethyl alcohol material can be improved through the synergistic effect of the dodecyl dimethyl benzyl ammonium chloride and the nano titanium dioxide, so that the antibacterial rate to escherichia coli can reach 99.8%, and the antibacterial rate to staphylococcus aureus can reach 99.5%.
2. In the application, the silane coupling agent is preferably adopted to pretreat the nano titanium dioxide, so that the specific surface energy of the surface of the nano titanium dioxide can be reduced, and the dispersibility of the nano titanium dioxide is improved, so that the nano titanium dioxide can better play a role, and the antibacterial property of the polymethyl alcohol material is further improved.
Detailed Description
The present application is described in further detail below with reference to specific contents.
Raw materials
The polymerization degree of polyformaldehyde is 100; the dispersant is sodium hexametaphosphate; the silane coupling agent is vinyl triethoxysilane.
Preparation example
Preparation example 1
A composite prepared by the following method:
putting 1kg of dodecyl dimethyl benzyl ammonium chloride into 5kg of absolute ethyl alcohol, adding 0.2kg of nano titanium dioxide, stirring for 25min, introducing nitrogen, heating to 70 ℃ under the protection of nitrogen, performing reflux reaction for 6h, filtering after the reaction is finished, extracting for 24h by using an ethanol solution with the mass fraction of 70%, taking out and drying to obtain the compound.
Preparation example 2
A composite, which is different from preparation example 1 in the amount of nano titanium dioxide added, was 0.3kg in preparation example 2.
Preparation example 3
A composite, which is different from preparation example 1 in the amount of nano titanium dioxide added, was 0.4kg of nano titanium dioxide in preparation example 3.
Preparation example 4
A peanut shell extract, which is prepared by the following method:
cleaning peanut shell with water, adding into 70% ethanol solution of coral powder, stirring for 8min, extracting at power of 120W, frequency of 40Kz and temperature of 55 deg.C for 35min to obtain peanut shell extract, wherein the addition amount of ethanol solution in each 1g of peanut shell is 30mL.
Preparation example 5
An antibacterial liquid is prepared by the following method:
mixing safflower, mugwort, dandelion and vanilla, crushing to 100 meshes, adding 75% of ethanol solution for leaching for 6d, filtering, collecting a first filtrate, adding 75% of ethanol solution again into filter residues for leaching, filtering, collecting a second filtrate, and mixing the first filtrate and the second filtrate to obtain an antibacterial solution; wherein the weight ratio of the total weight of the safflower, the mugwort, the dandelion and the vanilla to the weight of the ethanol solution added each time is 1: (24).
Examples
Example 1
An antibacterial modified polymethyl alcohol material, the raw material ratio of which is shown in table 1.
A preparation process of an antibacterial modified methanol material comprises the following steps:
mixing polyformaldehyde, a dispersing agent, zinc oxide, the peanut shell extract prepared in preparation example 4 and the compound prepared in preparation example 1, stirring for 8min, melting at 180 ℃, granulating to obtain a semi-finished product, soaking the semi-finished product in the antibacterial liquid prepared in preparation example 5 for 32h, taking out, and drying to obtain the antibacterial modified polymethyl methacrylate material.
Examples 2 to 5
An antibacterial modified polyol material is different from that in example 1 in the raw material ratio of the polyol material, which is shown in table 1.
TABLE 1 examples 1-5 amounts of raw materials in the polyol materials (unit: kg)
Figure BDA0003878799140000051
Examples 6 to 8
An antibacterial modified polyol material is different from that in example 5 in the raw material ratio of the polyol material, which is shown in Table 2.
TABLE 2 examples 6-8 amount of each raw material (unit: kg) to be blended in the polyol material
Figure BDA0003878799140000061
Example 9
An antibacterial modified polyol material which is different from that in example 7 in that a compound in the polyol material is prepared by using preparation example 2.
Example 10
An antibacterial modified polyol material which differs from example 7 in that a composite in the polyol material was prepared using preparation example 3.
Example 11
An antibacterial modified polyol material as in blend example 9, differing in that the nano titanium dioxide in the composite is pre-treated before use by the following method: adding the nano titanium dioxide into an ethanol solution with the mass fraction of 80%, adding a silane coupling agent, stirring for 15min, filtering, and washing with water for 5 times. Drying to obtain pretreated nano titanium dioxide; wherein, the addition amount of the ethanol solution in each 1g of the nano titanium dioxide is 5mL, and the weight ratio of the nano titanium dioxide to the silane coupling agent is 1.
Comparative example
Comparative example 1
An antibacterial modified polyol material which differs from that of example 1 in that no complex is added to the polyol material.
Comparative example 2
An antibacterial modified polymethyl alcohol material which differs from example 1 in that the complex in the polymethyl alcohol material is replaced by dodecyl dimethyl benzyl ammonium chloride in equal amounts.
Comparative example 3
An antibacterial modified polyol material which differs from example 1 in that the composite in the polyol material is replaced by nano titanium dioxide in equal amount. Performance test
The following property tests were carried out on the antibacterial modified methanol materials of examples 1 to 11 and comparative examples 1 to 3:
the bacteriostatic rate of escherichia coli and the bacteriostatic rate of staphylococcus aureus are as follows: the antibacterial rate of the polymethyl alcohol material is measured according to QB/T2591-2003A 'antibacterial plastic antibacterial performance test method and antibacterial effect', and the detection results are shown in Table 3; wherein the total number of original colonies of Escherichia coli is 1.9 × 10 6 CFU/g, total number of primary colonies of Staphylococcus aureus 1.85X 10 6 CFU/g。
TABLE 3 test results
Figure BDA0003878799140000071
It can be seen from table 3 that the antibacterial modified polyvinyl alcohol material provided by the application improves the antibacterial effect of the polyvinyl alcohol material and the bacteriostatic rate of the polyvinyl alcohol material on escherichia coli and staphylococcus aureus through the synergistic effect of the raw materials, wherein the bacteriostatic rate on escherichia coli is 95.8-99.8%, and the bacteriostatic rate on staphylococcus aureus is 95.7-99.5%.
As can be seen by combining the embodiment 1 and the comparative examples 1 to 3, the bacteriostasis rate of escherichia coli in the embodiment 1 is 95.8%, and the bacteriostasis rate of staphylococcus aureus is 95.7%, which are superior to those in the comparative examples 1 to 3, and the fact that the dodecyl dimethyl benzyl ammonium chloride and the nano titanium dioxide are jointly used as a compound in the methanol material is more suitable, and the bacteriostasis rates of the methanol material on the escherichia coli and the staphylococcus aureus can be improved and the antibacterial property of the methanol material is improved through the synergistic effect of the dodecyl dimethyl benzyl ammonium chloride and the nano titanium dioxide.
As can be seen by combining examples 1-5, the bacteriostatic rate of Escherichia coli in example 5 is 98.5%, and the bacteriostatic rate of Staphylococcus aureus is 98.5%, which indicates that the addition amount of the compound in example 5 is more appropriate, and the bacteriostatic rate of the polymethyl alcohol material to Escherichia coli and Staphylococcus aureus can be improved, and the antibacterial property of the polymethyl alcohol material is improved.
It can be seen from the combination of examples 6-8 that the other materials in the polymethanol material than the composite have little effect on the properties of the polymethanol material.
It can be seen from the combination of example 7 and examples 9-10 that the bacteriostatic rate of escherichia coli in example 9 is 99.5%, and the bacteriostatic rate of staphylococcus aureus is 99.3%, which indicates that the composite prepared by the preparation example 2 is more suitable, and can improve the bacteriostatic rate of the polyvinyl alcohol material on escherichia coli and staphylococcus aureus and improve the antibacterial property of the polyvinyl alcohol material.
Combining with the embodiment 9 and the embodiment 11, it can be seen that the bacteriostatic rate of escherichia coli in the embodiment 11 is 99.8%, and the bacteriostatic rate of staphylococcus aureus is 99.5%, which indicates that the nano titanium dioxide in the composite is more suitable for pretreatment before use, and can improve the bacteriostatic rate of the polymethyl alcohol material on escherichia coli and staphylococcus aureus, and improve the antibacterial property of the polymethyl alcohol material.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of the present application is not limited by the embodiments of the present application, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. An antibacterial modified polymethyl alcohol material is characterized in that: the feed comprises the following raw materials in parts by weight: 80-120 parts of polyformaldehyde, 1-5 parts of a dispersing agent, 6-15 parts of zinc oxide, 8-20 parts of a peanut shell extract, 15-30 parts of an antibacterial liquid and 5-12 parts of a compound, wherein the compound is prepared by compounding dodecyl dimethyl benzyl ammonium chloride and nano titanium dioxide.
2. The antibacterial modified polyvinyl alcohol material as claimed in claim 1, wherein: the feed comprises the following raw materials in parts by weight: 90-110 parts of polyformaldehyde, 2-4 parts of a dispersing agent, 8-12 parts of zinc oxide, 12-16 parts of a peanut shell extract, 18-26 parts of an antibacterial liquid and 7-10 parts of a compound.
3. The antibacterial modified poly-methanol material as claimed in claim 1, wherein: the compound is prepared by the following method: placing dodecyl dimethyl benzyl ammonium chloride into absolute ethyl alcohol, adding nano titanium dioxide, uniformly mixing, introducing nitrogen, heating and refluxing under the protection of nitrogen, filtering after the reaction is finished, extracting, and drying to obtain the compound.
4. An antibacterial modified poly-methanol material as claimed in claim 3, wherein: the weight ratio of the dodecyl dimethyl benzyl ammonium chloride to the nano titanium dioxide is 1: (0.2-0.4).
5. An antibacterial modified poly-methanol material as claimed in claim 3, wherein: the nano titanium dioxide is pretreated by adopting the following method before use: and (3) putting the nano titanium dioxide into an ethanol solution, adding a silane coupling agent, uniformly mixing, filtering, washing and drying to obtain the pretreated nano titanium dioxide.
6. The antibacterial modified poly-methanol material as claimed in claim 1, wherein: the peanut shell extract is prepared by the following method: cleaning peanut shells, putting the peanut shells into an ethanol solution, uniformly mixing, and performing ultrasonic extraction to obtain a peanut shell extract.
7. The antibacterial modified polyvinyl alcohol material as claimed in claim 1, wherein: the antibacterial liquid is prepared by the following method: mixing and crushing safflower, mugwort, dandelion and vanilla, adding an ethanol solution for extraction, filtering, collecting a first filtrate, adding the ethanol solution into filter residues again for extraction, filtering, collecting a second filtrate, and mixing the first filtrate and the second filtrate to obtain the antibacterial liquid.
8. A process for preparing an antibacterial modified methanol material as claimed in any one of claims 1 to 7, comprising the steps of:
uniformly mixing polyformaldehyde, a dispersing agent, zinc oxide, a peanut shell extract and a compound, melting, granulating to obtain a semi-finished product, soaking the semi-finished product in an antibacterial liquid, taking out, and drying to obtain the antibacterial modified polymethyl methacrylate material.
CN202211237229.8A 2022-10-08 2022-10-08 Antibacterial modified methanol-rich material and preparation process thereof Pending CN115530182A (en)

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