Full-degradable plastic film with wide using temperature range and strong toughness and manufacturing method thereof

Abstract

The invention discloses a full-degradable plastic film with wide using temperature range and strong toughness. Polyving akohol and acorn starch are used as main film-forming materials for manufacturing the full-degradable plastic film. Compared with a traditional technology, a manufacturing method of the full-degradable plastic film has the advantages that nanosilicon dioxide and the acorn starch are modified by a physical chemistry method and mutually matched with other effective constituents at the same time so that the acorn starch and hydroxide radicals in polyving akohol molecules are preferentially combined with surface hydroxyl groups of a defined amount of nanosilicon dioxide to form hydrogen bonds, thus increasing the compatibility of the acorn starch and the polyving akohol and improving the water tolerance of the film. The manufactured full-degradable plastic film has excellent biodegradability, good toughness, relatively high tear resistance and wide using temperature range, can meet the performance requirements of plastic products producing relatively serious white pollution such as disposable packages, tableware and plastic shopping bags on the market and is wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of natural polymer materials, in particular to a fully degradable plastic film with a wide temperature range and strong toughness 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 material...

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