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Prepn of biodegradable material

A technology of biodegradable materials and mixtures, which is applied in the field of preparation of soybean protein biodegradable materials, can solve the problems of improper selection of plasticizers and unsuccessful development of biodegradable materials, and achieves a wide range of uses and raw material sources. Effect

Inactive Publication Date: 2003-05-14
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] Although the above studies are aimed at complete degradability, due to improper selection of plasticizers, biodegradable materials were not successfully developed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to the ratio of 30% plasticizer and 70% modified protein, get 0.6kg plasticizer and 1.4kg modified protein respectively, after these raw materials are fully mixed, pour them into the flat mold of flat vulcanizer, Hot pressing is the finished product. The hot pressing time is 1-10 minutes, the mold temperature is 115-160°C, and the molding pressure is 5-20 MPa. When taking out the hot product, it must be cold-pressed to prevent deformation.

[0032] The sample was subjected to a microbial degradability test, and the degradability of soybean protein biodegradable plastics was determined according to the method of the national standard GB / T 18006.2-1999. The results show that the degradation rate is greater than 98.8%.

Embodiment 2

[0034] By 60% plasticizer, 39.99% modified soybean protein, the ratio of 0.01% pigment, respectively get plasticizer 1.2kg plasticizer, 0.798kg modified soybean protein and the pigment of 0.0002kg, this After the raw materials are mixed evenly, they are poured into the bowl-shaped mold of the flat vulcanizing machine, hot-pressed and formed, and cooled and formed in the same mold under the same pressure to obtain the finished product. The hot pressing time is 1-10 minutes, the mold temperature is 115-160° C., and the molding pressure is 5-20 MPa.

[0035] Take out this bowl mold, pour into the boiling water that accounts for its volume 2 / 3, stand for 0.5 hour, find that swelling and seepage phenomenon do not appear in the sample.

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PUM

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Abstract

The present invention relates to a biodegradable soybean protein plastic and aims at providing a biodegradable material capable of degrading completely and being high temperature resistant. The preparation process of the biodegradable material includes the following steps: stirring and reacting soybean protein with modifier at normal temperature to obtain modified soybean protein; mixing modifiedsoybean protein in 20-80 wt% and glycerin as plasticizer in 20-80 wt% via stirring; and forming.

Description

technical field [0001] The invention relates to a preparation method for developing soybean protein biodegradable materials. Background technique [0002] With the enhancement of human environmental protection awareness, we gradually realize the seriousness of the harm to the earth caused by "white pollution" caused by non-degradable plastics. Human beings are increasingly calling for the development of a material that can replace non-degradable plastic products. [0003] At present, most of the packaging materials in various countries are still non-degradable, and its main components are polyethylene and polyvinyl chloride. Due to its many advantages, such as light weight and high strength, it has been widely used in the world. , but also brings difficulties to the disposal of garbage. [0004] In order to protect the homeland on which human beings depend, governments of various countries, especially economically developed countries, have legislated to restrict the use of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L89/00
Inventor 李里特陈复生
Owner CHINA AGRI UNIV
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