Oil-proof pea protein powder-based full-degradable plastic film and preparation method thereof

Abstract

The invention discloses an oil-proof pea protein powder-based full-degradable plastic film. Polyvinyl alcohol and pea protein powder are used as main film forming matters, and compared with a traditional technology, the preparation method has the advantages that nano silica and pea protein powder are modified through physical and chemical methods and cooperate with other effective ingredients mutually, so that on one hand, hydroxyl groups in pea protein powder and polyvinyl alcohol molecules are preferentially combined with a proper amount of nano silica surface hydroxyl groups to form hydrogen bonds, therefore, the degree of compatibility of pea protein powder and polyvinyl alcohol is improved and the water resistance of the film is improved; on the other hand, uniformly-dispersed single nanoparticles and nano-clusters can generate stress concentration points, therefore, the strength of the film is improved, and the prepared full-degradable plastic film is transparent in appearance and smooth in surface and has the characteristics of heat resistance, excellent water resistance and oil resistance, high biodegradable speed and simple preparation method.

Description

technical field [0001] The invention relates to the technical field of natural polymer materials, in particular to an oil-resistant pea protein powder-based 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 b...

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