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Preparation method of quaternary ammonium salt polyvinyl alcohol-cellulose-graphene oxide composite membrane

A compound technology of salinized polyvinyl alcohol and graphene, which is applied in the field of polymer materials, can solve the problems of small molecule antibacterial agents such as easy volatilization, difficult processing, and poor chemical stability, and achieve excellent antibacterial activity and improve water resistance.

Active Publication Date: 2017-12-08
JIANGNAN UNIV
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Problems solved by technology

There have been many studies on the antibacterial activity of small molecule quaternary ammonium antibacterial agents, but small molecule antibacterial agents have disadvantages such as volatile, difficult to process, and poor chemical stability.

Method used

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  • Preparation method of quaternary ammonium salt polyvinyl alcohol-cellulose-graphene oxide composite membrane
  • Preparation method of quaternary ammonium salt polyvinyl alcohol-cellulose-graphene oxide composite membrane

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Embodiment 1

[0024] (1) Preparation of CNC and GO composite dispersion (CNC / GO): Mix CNC and GO aqueous dispersion at a mass ratio of CNC and GO of 1:2, stir at room temperature for 10 min, and adjust CNC / GO composite liquid with deionized water The concentration is 0.005g / mL, and then ultrasonically dispersed in a 100W ultrasonic cleaner for 30 minutes to obtain a CNC / GO composite dispersion;

[0025] (2) Preparation of PVA / CNC / GO composite membrane: 2g of PVA was stirred and dissolved in 25mL of deionized water at 90°C to obtain a uniform PVA aqueous solution; the CNC / GO composite dispersion obtained in the above step (1) was added to Into the PVA aqueous solution, control the CNC / GO composite nanoparticles to be 3% of the PVA mass, and stir at 50°C to 60°C for 20 minutes to obtain the PVA / CNC / GO composite liquid; after the PVA / CNC / GO mixed liquid is left to defoam Pour it into a glass mold, let it stand at room temperature for 12 hours, and then dry it at 40°C for 3 hours to obtain a PV...

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Abstract

The invention relates to a preparation method of a quaternary ammonium salt polyvinyl alcohol-cellulose-graphene oxide composite membrane. The preparation method comprises the following steps: dispersing cellulose nanocrystals (CNC) and graphene oxide (GO) into deionized water, and carrying out uniform ultrasonic dispersion to obtain composite dispersion liquid (CNC / GO) of the CNC and the GO; dissolving polyvinyl alcohol (PVA) into deionized water at the temperature of 90 DEG C by stirring, adding the CNC / GO dispersion liquid, evenly stirring and then pouring into a glass mould to form a membrane; immersing the PVA / CNC / GO composite membrane into an ethanol / aqueous solution which contains quaternary ammonium salt (DMAEMA-OB), a photocrosslinking agent (ethylene glycol dimethyl acrylate (EGDMA)) and a photoinitiator 2959 for 3h, and enabling the quaternary ammonium salt to be subjected to cross-linking reaction under the radiation of ultraviolet light for fixing the quaternary ammonium salt into a PVA matrix so as to obtain the quaternary ammonium salt polyvinyl alcohol / cellulose / graphene oxide composite membrane. The composite membrane has excellent water resistance, mechanical properties and thermal stability, thus being possibly applied to the field of active package.

Description

technical field [0001] The invention relates to a preparation method of a quaternized polyvinyl alcohol / cellulose / graphene oxide composite film, in particular to a water-resistant and antibacterial composite material obtained after quaternization, and belongs to the field of polymer materials. Background technique [0002] With frequent public safety and health incidents in recent years, how to effectively control and eliminate the growth and spread of harmful bacteria and viruses is still an important issue closely related to human health. Antibacterial products are recognized as one of the new health products with broad development prospects. Antibacterial products such as antibacterial plastics, antibacterial ceramics, antibacterial fibers, and antibacterial coatings can be widely used in household appliances, daily necessities, textiles, clothing, and building materials. The development of new and efficient antibacterial materials is of great significance to maintaining ...

Claims

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Application Information

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IPC IPC(8): C08J7/18C08L29/04C08L1/04C08K3/04
CPCC08J7/18C08J2329/04C08J2433/14C08L29/04C08L2201/06C08L1/04C08K3/04
Inventor 白绘宇梁真真李章康吴志聪王玮张胜文东为富刘晓亚
Owner JIANGNAN UNIV
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