High-efficiency oxygen-insulation water-insulation blended full-degradable plastic film and preparation method thereof

Abstract

The invention discloses a high-efficiency oxygen-insulation water-insulation blended full-degradable plastic film. The high-efficiency oxygen-insulation water-insulation blended full-degradable plastic film is prepared from, by weight, 60 to 65 parts of corn starch, 7 to 9 parts of nano montmorillonite, 0.6 to 0.7 part of peanut oil, 1.2 to 1.4 parts of tetrabutyl titanate, 12 to 14 parts of ramie straw, 27 to 30 parts of polyvinyl alcohol, 1 to 2 parts of xanthan gum, 2 to 4 parts of sodium carboxymethylcellulose, 14 to 15 parts of polyethylene glycol, 7 to 9 parts of poly propylene carbonate, 4 to 6 parts of Pulullan, and 2 to 3 parts of ethyl silicon oil. According to a preparation method, synergistic effect of polyving akohol, polyethylene glycol, and poly propylene carbonate is realized; so that the melting point of polyving akohol is reduced, better blending with a starch master batch is realized, barrier property of plastic film is improved, and oxygen insulation and water insulation effects are excellent. The high-efficiency oxygen-insulation water-insulation blended full-degradable plastic film can be taken as food packaging bags and preservative film, and is capable of insulating oxygen and water, and realizing fresh-keeping effects; and prepared products are capable of satisfying using requirements and can be degraded rapidly after abandoning.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to a blended fully degradable plastic film with high-efficiency oxygen and water barriers and a preparation method thereof. Background technique [0002] In recent years, due to the increasingly serious "white pollution" caused by waste plastics that are difficult to degrade, it has attracted widespread attention from all over the world. Countries around the world have successively issued relevant laws and regulations restricting or prohibiting the use of non-degradable plastic packaging. On the other hand, because petroleum, the raw material for making traditional plastics, is a non-renewable resource, it will be exhausted with the massive use of human beings. Therefore, it is imminent to develop environmentally friendly plastics that use renewable resources as raw materials and are degradable. The use of biodegradable starch materials to prepare degradable packaging films ha...

AI Technical Summary

Problems solved by technology

However, while starch can improve the degradability of plastics, on the one hand, it will cause a decrease in its physical and mechanical properties, making it difficult to process. Poor, resulting in a significant decline in the mechanical properties of the film, poor water barrier performance, thus hindering the wide application of starch plastics in the process of industrialization

[0003] Polyvinyl alcohol is a widely used high molecular polymer, its performance is between plastic and rubber, it contains a large number of polar hydroxyl groups, its toxicity is very low, its molecular chain structure is symmetrical and regular, and it has unique strong adhesion, Film flexibility, smoothness, oil resistance, solvent resistance, protective colloid, gas barrier and water resistance after special treatment, but also has a certain degree of biodegradability, in the presence of bacteria in a wet environment 6 It can be completely decomposed into water and carbon dioxide within one month. It is a completely biodegradable material, but the degradation process has high requirements on the degradation environment, so the degradation rate is still relatively slow.