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A kind of porous antibacterial material and preparation method thereof

A technology of antibacterial materials and antibacterial agents, applied in the field of porous antibacterial materials and their preparation, can solve the problems of poor hydrophilicity and other problems, and achieve the effects of strong antibacterial ability, good water absorption performance, and high-efficiency antibacterial effect

Active Publication Date: 2021-01-08
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the prior art discloses a large number of polymer quaternary ammonium salt antibacterial materials, the hydrophilic properties of the reported polymer antibacterial materials are poor, which limits their wide application to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 65g of polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 98% was dissolved in 950g of hot water to prepare a solution of 5% by mass, and 10g of sodium lauryl sulfate and 5g of dibutylnaphthalenesulfonate were added. Sodium bicarbonate, 30 g of paraformaldehyde, and 30 g of cornstarch were evenly mixed and poured into a blender, and stirred for 10 minutes; then 350 mL of sulfuric acid with a mass percentage of 50% was added, and the stirring was continued for 40 minutes. Pour the above liquid into an acid-resistant mold, put it in a constant temperature box, react at 30°C for 40 hours to solidify and form, wash, and dry to obtain polyvinyl acetal foam.

Embodiment 2

[0041] In a two-necked flask of 2500mL, add 1500mL of acetonitrile, 0.5mol of sodium hydroxide and the polyvinyl acetal foam prepared in Example 1 of 50g, 1mol of epoxypropyl dimethyl dodecyl ammonium chloride, seal , reacted at 0° C. for 72 hours, took out the prepared product, washed it with ethanol, and dried it in a vacuum oven to constant weight to obtain a porous antibacterial material.

[0042] Grafting rate calculation method:

[0043] Grafting rate GP = (W 1 -W 0 ) / W 0 ×100%

[0044] W 0 is the mass of initial polyvinyl acetal foam; W 1 For the quality of the porous antibacterial material.

[0045] Weigh the mass, and calculate the grafting rate of the porous antibacterial material prepared in Example 2 of the present invention to be 25.2%.

[0046] Saturated water absorption test method:

[0047] Weigh a certain amount of porous antibacterial material into deionized water at 20°C, take it out after 10 minutes, put it on a stainless steel mesh for 30 seconds t...

Embodiment 3

[0055] In a 2500mL two-necked flask, add 1500mL of acetonitrile, 0.1mol of sodium hydroxide and 0.5mol of pyridine mixture, 50g of polyvinyl acetal foam prepared in Example 1, 1mol of epoxypropyl dimethyl dodecyl chloride Ammonium, sealed, and reacted at 80°C for 6 hours, the obtained reaction product was taken out, washed with ethanol, dried in a vacuum oven to constant weight, and a porous antibacterial material was obtained.

[0056] According to the method described in Example 2, the grafting rate of the porous antibacterial material prepared in Example 3 of the present invention is 21.7%, and the saturated water absorption is 17.1g g -1 . The antibacterial rate to Escherichia coli is >99%, and the antibacterial rate to Staphylococcus aureus is >99%.

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Abstract

The invention provides a preparation method of a porous antibacterial material, comprising: reacting a quaternary ammonium salt antibacterial agent and polyvinyl acetal foam in a solvent under the action of a catalyst to obtain the porous antibacterial material. Compared with the prior art, the present invention uses polyvinyl acetal foam as a precursor, adopts a mild reaction system to initiate grafting reaction, and introduces a quaternary ammonium salt antibacterial chain segment on the polyvinyl acetal foam. This method can A porous antibacterial material with rapid and efficient antibacterial effect and water absorption function is prepared. The invention also provides a porous antibacterial material.

Description

technical field [0001] The invention relates to the technical field of antibacterial materials, in particular to a porous antibacterial material and a preparation method thereof. Background technique [0002] Antibacterial materials refer to materials that themselves have the function of killing or inhibiting microorganisms. Many substances in nature have a good function of sterilizing or inhibiting microorganisms, such as organic compounds with specific groups, some inorganic metal materials and their compounds, some minerals, etc. But at present, more antibacterial materials are added certain antibacterial substances (called antibacterial agents), so that the material has the ability to inhibit or kill surface bacteria, such as antibacterial plastics, antibacterial fibers and fabrics, antibacterial ceramics, antibacterial metal materials, etc. . [0003] Antibacterial agents are generally divided into two categories: inorganic antibacterial agents and organic antibacteri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08L29/14
CPCC08J9/40C08J2329/14
Inventor 沙迪杨旭姬相玲石凯许玖多王宝龙
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI