Anticorrosive fresh-keeping fully-degradable plastic film for food packaging and preparation method thereof

Abstract

The invention discloses an anticorrosive fresh-keeping fully-degradable plastic film for food packaging. Polyvinyl alcohol and cassava starch are adopted as film forming materials, and compared with the prior art, physical and chemical methods are adopted to perform modification on nano silicon dioxide and the cassava starch, and meanwhile other active ingredients are matched with the nano silicon dioxide and the cassava starch and cooperate with one another to ensure that hydroxyl radicals in the molecules of the cassava starch and polyvinyl alcohol can be bonded with an appropriate amount of hydroxyl radicals on the surface of the nano silicon dioxide in priority to form hydrogen bonds, so that the compatibility degree of the cassava starch and the polyvinyl alcohol is increased, the water resistance of the film is improved, and the prepared fully-degradable plastic film is high in strength and good in toughness, has good anticorrosive fresh-keeping performance and high temperature resistance, has a heat resistance temperature reaching 80-100 DEG C, can meet general use requirements, also can prevent static electricity, and is wide in application range and broad in prospect.

Description

technical field [0001] The invention relates to the technical field of natural polymer materials, in particular to an antiseptic and fresh-keeping fully degradable plastic film for food packaging and a production 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, st...

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