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A kind of preparation method of antibacterial polyvinyl alcohol/nanocrystalline cellulose-graphene oxide pva/cnc-go composite film

A technology of nanocrystalline cellulose and polyvinyl alcohol, which is applied in the field of water-resistant and antibacterial composite materials by adding CNC, GO, and Ag. It can solve the problems of limited application, barrier property, and strength decline, and achieve excellent antibacterial activity and improve water resistance. Effect

Active Publication Date: 2019-04-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to the high hydrophilicity of PVA, the hydroxyl group is easy to form hydrogen bonds with water molecules in the case of high ambient humidity, resulting in changes in the aggregated structure of PVA, resulting in a sharp decline in barrier properties and strength, which limits its application in many fields. Applications, especially in the field of daily packaging materials

Method used

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  • A kind of preparation method of antibacterial polyvinyl alcohol/nanocrystalline cellulose-graphene oxide pva/cnc-go composite film
  • A kind of preparation method of antibacterial polyvinyl alcohol/nanocrystalline cellulose-graphene oxide pva/cnc-go composite film

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Embodiment 1

[0023] (1) Preparation of CNC and GO composite dispersion liquid CNC-GO: Mix CNC and GO aqueous dispersion liquid according to the mass ratio of CNC and GO at 1:2, stir at room temperature for 10 min, and adjust the concentration of CNC-GO composite liquid with deionized water to 0.005g / mL, and then in a 100W ultrasonic cleaning machine, ultrasonically disperse for 30min to obtain a composite dispersion with a mass ratio of CNC and GO of 1:2, which is denoted as (CNC:GO-1:2);

[0024] (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; 12mL of the PVA / (CNC:GO obtained in the above step (1) -1:2) composite dispersion was added to the PVA aqueous solution, stirred at 50°C for 20min to obtain a PVA / 3% (CNC:GO-1:2) mixed solution; PVA / 3% (CNC:GO-1:2) ) The mixed solution was left to defoam and then poured into a glass mold, left to stand at room temperature for 20 hours, ...

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Abstract

The invention relates to a preparation method of an antibacterial polyvinyl alcohol / cellulose nanocrystal-graphene oxide (PVA / CNC-GO) composite film. The preparation method comprises the following steps: dispersing CNC and GO into deionized water and performing ultrasonic dispersion uniformly to obtain composite dispersing liquid CNC-GO of CNC and GO; stirring PVA at a temperature of 90 DEG C to dissolve into deionized water, adding the CNC and GO composite dispersing liquid, stirring uniformly and casting in a glass mold to form a film; immersing the PVA / CNC-GO composite film into an ethanol / aqueous solution of AgNO3 and performing stirring reaction at a temperature of 50 DEG C for 24 hours to prepare the PVA / CNC-GO composite film with antibacterial activity. The PVA composite film provided by the invention synthesizes the excellent performance of GO, CNC, PVA and nano-silver, and has the advantages of high water resistance, high heat stability, high tensile strength, high antibacterial activity and the like.

Description

technical field [0001] The invention relates to a method for preparing an antibacterial polyvinyl alcohol / cellulose-graphite oxide PVA / CNC-GO composite film, especially adding CNC, GO and Ag to obtain a water-resistant and antibacterial composite material, which belongs to the field of polymer composite materials. Background technique [0002] With the continuous improvement of living standards, people have also put forward higher requirements for the production and living environment. The use of more environmentally friendly, safer and healthier active packaging films for antibacterial products can completely eliminate people-to-people, people-to-things, things-to-things Bacterial cross-infection among people has become the mainstream of world health development. [0003] Water-soluble polyvinyl alcohol (PVA) is obtained by hydrolysis of polyvinyl acetate, and its structural formula is -CH 2 CH(OH) n -It is a high molecular polymer with hydroxyl groups. The main chain of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L1/04C08K3/04C08K3/08C08J5/18
CPCC08J5/18C08J2329/04C08J2401/04C08K2201/011C08L29/04C08L2201/06C08L2203/16C08L1/04C08K3/04C08K2003/0806
Inventor 白绘宇梁真真李章康王玮张胜文石刚刘晓亚
Owner JIANGNAN UNIV