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Biological full-degradable plastic film and preparation method thereof

A plastic film, fully degradable technology, applied in the field of biodegradable plastic film and its preparation, can solve the problems of slow degradation speed, poor mechanical properties, high production cost, etc., and achieve fast degradation speed, good mechanical properties, and low production cost Effect

Inactive Publication Date: 2017-03-22
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been many reports on the modification of starch with nano-silica or polyvinyl alcohol to produce degradable plastic films, but there are still problems such as poor mechanical properties, slow degradation speed, and complex formulations.
In addition, the existing starch-based degradable plastics mostly use corn starch, wheat starch, rice starch, sweet potato starch or potato starch as raw materials, and the production cost is relatively high.

Method used

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  • Biological full-degradable plastic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A fully biodegradable plastic film is mainly made of the following raw materials in parts by weight: 48 parts of tapioca starch, 35 parts of glycerin, 35 parts of polyvinyl alcohol, and 4 parts of hydrophilic nano silicon dioxide.

[0025] The fully biodegradable plastic film also includes 0.5 parts by weight of a catalyst, and the catalyst is mainly composed of fumed white carbon black, zinc oxide and 2-mercaptobenzothiazole in a weight percentage of 10:3:2.

[0026] A method for preparing a biodegradable plastic film, comprising the steps of:

[0027] A, take the tapioca starch of above-mentioned weight portion and the hydrophilic nano-silicon dioxide of above-mentioned weight portion, put it into the ultra-high speed mixer, stir 20 minutes under 4000 rev / mins, get the first mixture;

[0028] B. Add the first mixture, the polyvinyl alcohol of the above-mentioned weight part and the glycerin of the above-mentioned weight part into the internal mixer sequentially, and r...

Embodiment 2

[0034] A fully biodegradable plastic film is mainly made of the following raw materials in parts by weight: 60 parts of tapioca starch, 40 parts of glycerin, 40 parts of polyvinyl alcohol, and 5 parts of hydrophilic nano silicon dioxide.

[0035] The fully biodegradable plastic film also includes 0.8 parts by weight of a catalyst, and the catalyst is mainly composed of fumed white carbon black, zinc oxide and 2-mercaptobenzothiazole in a weight percentage of 10:3:2.

[0036] A method for preparing a biodegradable plastic film, comprising the steps of:

[0037] A, take the tapioca starch of above-mentioned weight portion and the hydrophilic nano-silica of above-mentioned weight portion, put it into the ultra-high speed mixer, stir 18 minutes under 4200 rev / mins, get the first mixture;

[0038] B. Add the first mixture, the polyvinyl alcohol of the above-mentioned weight part and the glycerin of the above-mentioned weight part into the internal mixer sequentially, and react for ...

Embodiment 3

[0044] A fully biodegradable plastic film is mainly made of the following raw materials in parts by weight: 72 parts of tapioca starch, 45 parts of glycerin, 45 parts of polyvinyl alcohol, and 6 parts of hydrophilic nano silicon dioxide.

[0045] The fully biodegradable plastic film also includes 1 part by weight of a catalyst, and the catalyst is mainly composed of fumed white carbon black, zinc oxide and 2-mercaptobenzothiazole in a weight percentage of 10:3:2.

[0046] A method for preparing a biodegradable plastic film, comprising the steps of:

[0047] A, take the tapioca starch of above-mentioned weight portion and the hydrophilic nano silicon dioxide of above-mentioned weight portion, put it into the ultra-high speed mixer, stir 15 minutes under 4500 rev / mins, get the first mixture;

[0048]B. Add the first mixture, the above weight portion of polyvinyl alcohol and the above weight portion of glycerin into the internal mixer sequentially, and react for 30 minutes at a r...

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Abstract

The invention discloses a biological full-degradable plastic film, which is mainly prepared from the following raw materials by weight: 48-72 parts of cassava starch, 35-45 parts of glycerin, 35-45 parts of polyvinyl alcohol, and 4-6 parts of hydrophilic nano-silica, wherein the cassava starch and hydrophilic nano-silica are in a weight ratio of 12:1. The preparation method of the biological full-degradable plastic film includes: conducting high-speed mixing, banburying and film casting on the raw materials, then subjecting the obtained plastic film to ultraviolet radiation treatment, and then performing drying. The biological full-degradable plastic film provided by the invention has the advantages of excellent mechanical properties, fast degradation speed, simple formula, and low production cost, etc.

Description

technical field [0001] The invention relates to the field of degradable plastic films. More specifically, the present invention relates to a fully biodegradable plastic film and a preparation method thereof. Background technique [0002] Starch is a natural renewable material with abundant resources and low price, and is easily eroded by microorganisms, and finally metabolized into water and carbon dioxide. Therefore, it has excellent biodegradability and is suitable as a raw material for biodegradable materials. Since starch is too hydrophilic and has poor compatibility with most general-purpose resins, it is usually necessary to modify starch during use. At present, there have been many reports on the modification of starch with nano-silica or polyvinyl alcohol to produce degradable plastic films, but there are still problems such as poor mechanical properties, slow degradation speed, and complex formulations. In addition, the existing starch-based degradable plastics mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L29/04C08K13/02C08K5/053C08K3/36C08K3/22C08J3/28C08J3/24
CPCC08L3/02C08J3/246C08J3/28C08J5/18C08J2303/02C08J2429/04C08K2201/011C08K2201/014C08L2201/06C08L2203/16C08L2312/06C08L29/04C08K13/02C08K5/053C08K3/36C08K2003/2296
Inventor 刘钰馨
Owner GUANGXI TEACHERS EDUCATION UNIV
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