Degradable food packaging film with antibacterial function

Abstract

The invention provides a degradable food packaging film with antibacterial function. The degradable food packaging film with antibacterial function is characterized in that nanocellulose is used as amatrix, and nanometer ZnO particles and the nanocellulose are uniformly mixed to prepare a nanocellulose/nanometer ZnO composite film; then the film is immersed in a chitosan solution with a certain concentration, the chitosan is assembled onto the surface of the composite film through a self-assembly way, and then the obtained composite film is dried through a microwave drying way; and the self-assembly process can be repeated 5-8 times as needed, and finally the food packaging film which can be completely degraded and has a high antibacterial grade is obtained. According to the degradable food packaging film with antibacterial function, the biomass nanocellulose, the nanometer ZnO particles and the chitosan are used as raw materials, and are processed into the degradable food packaging film with antibacterial function through methods of microparticle dispersion, layer by layer self-assembly and microwave drying, so that the problems of non-uniform composite, poor antibacterial property, low strength, and the likes of a current nanocellulose and chitosan film are solved.

Description

technical field [0001] The invention relates to a food packaging film, in particular to a degradable food packaging film with antibacterial function. Background technique [0002] The invention belongs to food packaging materials. In recent years, fast food and beverages at home and abroad have developed very rapidly, but traditional food packaging materials cannot be used as food. Such as fast food such as instant noodles, when the diner eats, the condiment bag needs to be cut or torn, and the condiment is taken out, and the condiment bag is thrown away. This is both inconvenient and pollutes the environment. [0003] After searching, it was found that the invention of patent No. CN201710571643.5 discloses a degradable food packaging film, which is composed of the following raw materials in parts by weight: 38-45 parts of polyvinyl alcohol, 25-35 parts of polylactic acid, 20-30 parts of chitosan 14-21 parts of starch, 5-10 parts of cotton fiber, 4-8 parts of kaolin, 2-5 ...

AI Technical Summary

Problems solved by technology

It solves the current problems of uneven compounding of nanocellulose and chitosan films, poor antibacterial properties, and low strength