Water-blocking and oil-blocking fully degradable plastic film used for food packaging and preparation method thereof

Abstract

The invention discloses a water-blocking and oil-blocking fully degradable plastic film used for food packaging. The water-blocking and oil-blocking fully degradable plastic film is characterized by being prepared from, by weight, 60-65 parts of corn starch, 7-9 parts of nano-montmorillonite, 0.6-0.7 part of peanut oil, 1.2-1.4 parts of tetrabutyl titanate, 12-14 parts of ramie sticks, 30-35 parts of poval, 9-12 parts of polycaprolactone, 12-15 parts of trioctyl citrate, 2.5-3 parts of sodium alginate, 3-5 parts of calcium carbonate, 2-3 parts of butyl lactate and 1-1.5 parts of sodium trimetaphosphate. Poval of the appropriate amount is added to be matched with the starch-based material, then the trioctyl citrate and the butyl lactate are added to be blended, the melting point of the poval can be reduced, which is more beneficial for industrial production, the strength and flexibility are improved, and the prepared film is solid and durable; the plastic film can be applied to food packaging and cleaning bags and the like and be fully degraded and therefore is worthy of large-area popularization.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to a fully degradable water-repellent and oil-repellent plastic film for food packaging and a preparation method thereof. Background technique [0002] At present, the development speed of the traditional polymer material industry has been slowed down due to the increasing cost caused by the dwindling oil resources. At the same time, the environmental pollution caused by polymer materials has become increasingly prominent, which has attracted great attention from the society. Natural polymer materials are recyclable resources, which can be decomposed by microorganisms into non-polluting substances, such as inorganic small molecules, water and carbon dioxide, etc., and natural polymer materials have strong plasticity, can be passed A variety of modification methods make it a desired functional material with certain special properties. Therefore, many countries have invested a l...

AI Technical Summary

Problems solved by technology

However, while starch improves the degradability of plastics, on the one hand, it will cause a decrease in its physical and mechanical properties, making it difficult to process. On the other hand, it is also too hydrophilic, which is not compatible with most general-purpose resins. Poor, resulting in a significant decline in the mechanical properties of the film, poor water resistance, thus hindering the wide application of starch plastics in the process of industrialization