Air-permeable full-degradable plastic film and manufacturing method thereof

Abstract

The invention discloses an air-permeable full-degradable plastic film which adopts polyvinyl alcohol and high gluten flour as main film forming matters. Compared with the traditional technique, the air-permeable full-degradable plastic film is characterized in that a physicochemical process is adopted to modify nano silicon dioxide and the high gluten flour, and the other effective components are matched, so that hydroxy groups in the high gluten flour and polyvinyl alcohol molecules can be preferentially combined with a right amount of hydroxy groups on the nano silicon dioxide surface to form hydrogen bonds, thereby enhancing the compatibility between the high gluten flour and polyvinyl alcohol; and part of hydroxy groups in the high gluten flour and polyvinyl alcohol are sealed to improve the water resistance of the film. The prepared full-degradable plastic film has the advantages of high degradation ratio, favorable film-forming property, favorable air permeability, excellent thermoplastic processibility, low cost and simple technique, and is beneficial to environmental protection.

Description

technical field [0001] The invention relates to the technical field of natural polymer materials, in particular to a breathable fully degradable plastic film and a manufacturing method thereof. Background technique [0002] Synthetic polymer materials bring great convenience to people's life, but also cause serious pollution to the environment. In addition, the oil reserves for making traditional plastics are constantly decreasing. Therefore, renewable and environmentally friendly natural polymer materials have become a research hotspot. , Cellulose, starch, protein, etc. are natural polymers that are actually studied and applied more at present, so natural polymer-type fully degradable materials have become one of the research hotspots of new environment-friendly materials. [0003] Natural polymers have attracted extensive attention in the fields of food packaging and plastic film applications due to their wide source of raw materials, strong biodegradability and excellent...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of natural polymers: poor processing performance, brittleness and water resistance, etc., their application range is limited.

To solve this problem, a single modification method such as plasticizing, acid adjustment, crosslinking, filling or blending is often used. However, this single modification method is limited, and the fully degradable plastic film prepared has a single function and high cost. Industrial production

Nano-silica materials have special functional effects of nanoparticles, which can be used to improve the mechanical properties and water resistance of natural polymer films and polyvinyl alcohol films. There are very few research reports on composite films with polyvinyl alcohol