Biodegradable antibacterial film and preparation method thereof

Abstract

The invention discloses a biodegradable antibacterial film and a preparation method thereof, and belongs to the field of biodegradable antibacterial film preparation, polyvinyl alcohol, nano cellulose crystal and tea polyphenol are used as main film preparation materials, glycerol is used as a plasticizing modifier, glutaraldehyde is used as a cross-linking agent, and the biodegradable antibacterial film is prepared by a one-step method. The biodegradable antibacterial film is prepared by adopting a solution tape casting method. The prepared film has good mechanical properties, water resistance, light transmittance, moisturizing performance, antibacterial performance and full-biodegradation performance, and solves the problems that antibacterial films on the market are slow in degradation rate and cannot be completely degraded, and the problems that environmental pollution is caused in the degradation process of synthetic antibacterial agents and the like.

Description

technical field [0001] The invention belongs to the technical field of antibacterial film preparation, in particular to a biodegradable antibacterial film and a preparation method thereof. Background technique [0002] With the increasing production level, people's requirements for antibacterial materials are no longer limited to excellent antibacterial properties, but also to meet environmental friendliness. At this stage, it is clearly proposed to promote the use of non-plastic products and degradable shopping bags and packaging films (bags), and to promote degradable plastic films on a large scale in combination with agronomic measures. At present, the common antibacterial plastic films on the market are mostly made from traditional petroleum-based plastics such as PVC, PP, PE, PS, etc., which are low in cost and easy to be processed and produced on a large scale, but cannot be completely degraded naturally. Antibacterial agents such as quaternary ammonium salts, pyridine...

AI Technical Summary

Problems solved by technology

At present, the common antibacterial plastic films on the market are mostly made of traditional petroleum-based plastics such as PVC, PP, PE, PS, etc., which are cheap and easy to process and produce on a large scale, but they cannot be completely degraded naturally. The antibacterial agents used such as quaternary ammonium salts and pyridines Most of the decomposition products such as , imidazoles, organic metals, etc. have certain toxicity and are potentially harmful to the human body and the environment.

The existing degradable films have problems such as difficult to control the degradation rate, poor crack resistance, residual film will pollute the soil, and destroy the structure of soil microbial flora.

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