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Modified mung bean starch fully-degradable plastic film and preparation method thereof

A mung bean starch and plastic film technology, applied in the field of natural polymer materials, can solve the problems of poor processing performance, few research reports, high brittleness and water resistance, etc., achieve good mechanical properties and water resistance, wide source of raw materials, and increase compatibility degree of effect

Inactive Publication Date: 2015-09-09
TONGLING FOUNDER PLASTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The modified mung bean starch fully degradable plastic film is characterized in that it is made of the following raw materials in parts by weight: polyvinyl alcohol 105, mung bean starch 67, nano silicon dioxide 1.8, bamboo shoot fiber powder 13, polypropylene glycol 3.5 , Propyltrimethoxysilane 8, brucite powder 2-3, sodium chloride 0.4, appropriate amount of water.

[0014] The preparation method comprises the following steps:

[0015] (1) Add an appropriate amount of water to the mung bean starch and stir it into a paste, heat and pregelatinize it for 10-20 minutes, add sodium chloride and polypropylene glycol, stir and mix at a constant temperature for 2-3 hours, filter and dry naturally to obtain the modified mung bean starch;

[0016] (2) Vacuum dry the bamboo shoot fiber powder at 105°C for 2-4 hours, add propyltrimethoxysilane and nano-silica, stir and grind for 2-3 hours, and dry;

[0017] (3) Put polyvinyl alcohol in a water bath at 80-90°C and keep it warm f...

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Abstract

The invention discloses a modified mung bean starch fully-degradable plastic film, wherein polyvinyl alcohol and mung bean starch serve as main film-forming substances. Compared with the traditional technology, nano-silica and the mung bean starch are modified by a physical-chemical method and other active components are interacted, so that hydroxyls of the mung bean starch and polyvinyl alcohol molecules are preferentially combined with the surface hydroxyl of a proper amount of nano-silica to form hydrogen bonds, the compatibility degree of the mung bean starch and polyvinyl alcohol is increased, partial hydroxyls of the mung bean starch and polyvinyl alcohol are closed, the water resistance of the film is improved, and the prepared fully-degradable plastic film has excellent mechanical property and water resistance. The modified mung bean starch fully-degradable plastic film has wide raw material sources and simple processes, can be biodegraded fully, and is applicable to packaging materials, agricultural sustained-release systems, stationery and sporting goods, outdoor appliances and the like.

Description

technical field [0001] The invention relates to the technical field of natural polymer materials, in particular to a modified mung bean starch 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 biodegradabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/04C08L97/02C08K13/06C08K9/06C08K3/36C08K3/22
Inventor 陈可夏陈可亮潮建平
Owner TONGLING FOUNDER PLASTICS TECH
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