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Degradable plastic based on plant fiber starch as well as preparation method and preparation system ofdegradable plastic

A technology of plant fiber starch and degradable plastics, applied in the field of degradable plastics, can solve the problems of food hazards, multiple chemical raw materials, and poor degradability of plastics

Pending Publication Date: 2021-07-30
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides degradable plastics based on plant fiber starch and its preparation method and preparation system, which solves the problems of poor degradability of plastics, use of more chemical raw materials, and certain harm to food

Method used

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  • Degradable plastic based on plant fiber starch as well as preparation method and preparation system ofdegradable plastic
  • Degradable plastic based on plant fiber starch as well as preparation method and preparation system ofdegradable plastic
  • Degradable plastic based on plant fiber starch as well as preparation method and preparation system ofdegradable plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] S1. Plant fiber preparation: select 25 parts of rice straw and 20 parts of straw, pour them into a freezer pulverizer for crushing, after pulverization, pass them through 60-mesh and 100-mesh sieves, and then use a ball mill to pulverize them, then pass through 100 mesh sieves. Mesh and 200 mesh sieves to obtain plant powder, then pour the obtained plant powder into a blender, add 25 parts of deionized water, start the blender for stirring, set the temperature to 200°C during stirring, and control the stirring rate at 200r / min , the stirring time is 40min, then add 17 parts of natural resin powder, set the temperature to 190°C, control the stirring speed at 200r / min, and the stirring time is 45min, and the plant fiber can be obtained;

[0043] S2. Preparation of starch mixture: select 15 parts of tapioca starch and pour it into a blender, then add 45 parts of absolute ethanol for stirring, set the temperature during stirring to 75°C, control the stirring speed at 200r / mi...

Embodiment 2

[0046] S1. Plant fiber preparation: select 20 parts of rice straw and 15 parts of straw, pour them into a freezer pulverizer for crushing, after pulverization, pass them through 60-mesh and 100-mesh sieves, and then use a ball mill to pulverize them, then pass through 100 mesh sieves. Mesh and 200 mesh sieves to obtain plant powder, then pour the obtained plant powder into a blender, add 20 parts of deionized water, start the blender for stirring, set the temperature during stirring to 150°C, and control the stirring rate at 150r / min , the stirring time is 30min, then add 10 parts of natural resin powder, set the temperature to 180°C, control the stirring speed at 150r / min, and the stirring time is 40min, and the plant fiber can be obtained;

[0047] S2. Preparation of starch mixture: select 10 parts of tapioca starch and pour it into a blender, then add 30 parts of absolute ethanol for stirring, set the temperature during stirring to 60°C, control the stirring speed at 150r / mi...

Embodiment 3

[0050] S1. Plant fiber preparation: select 30 parts of straw and 25 parts of straw, pour them into a freezer pulverizer for crushing, after pulverization, pass them through 60-mesh and 100-mesh sieves, and then use a ball mill to pulverize them, pass through 100 Mesh and 200 mesh sieves to obtain plant powder, then pour the obtained plant powder into a blender, add 30 parts of deionized water, start the blender for stirring, set the temperature during stirring to 250°C, and control the stirring rate at 250r / min , the stirring time is 50min, then add 25 parts of natural resin powder, set the temperature to 200°C, control the stirring speed at 250r / min, and the stirring time is 50min, and the plant fiber can be obtained;

[0051] S2. Preparation of starch mixture: select 20 parts of tapioca starch and pour it into a blender, then add 60 parts of absolute ethanol for stirring, set the temperature during stirring to 90°C, control the stirring speed at 250r / min, and stir for 30 minu...

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Abstract

The invention discloses degradable plastic based on plant fiber starch as well as a preparation method and preparation system of the degradable plastic. The degradable plastic comprises the following raw materials of: rice straw, straw, cassava starch, absolute ethyl alcohol, deionized water, natural resin powder, bamboo fiber powder, seaweed gel powder, a degradation accelerant, a modified treatment material, a filling agent, a cross-linking agent, polylactic acid, biological enzyme, a dispersing agent, a plasticizer and an antioxidant. The invention belongs to the technical field of degradable plastics. According to the degradable plastic based on the plant fiber starch and the preparation method of the degradable plastic, the use safety of a plastic product can be improved by using the plant fibers as the raw materials, the raw materials have certain environmental friendliness and reproducibility, the plant fibers have excellent biodegradability; and polylactic acid is added, the polylactic acid is a polymer obtained by polymerizing lactic acid serving as a main raw material, the raw material is sufficient in source and can be regenerated, and the production process of the polylactic acid is pollution-free.

Description

technical field [0001] The invention relates to the technical field of degradable plastics, in particular to degradable plastics based on plant fiber starch and its preparation method and preparation system. Background technique [0002] Degradable plastics, also known as environmentally degradable plastics, refer to plastics that add a certain amount of additives during the production process to reduce their stability and then degrade easily in the natural environment. The main application fields of degradable plastics are agricultural mulch , all kinds of plastic packaging bags, garbage bags, shopping bags in shopping malls, and disposable tableware. Tests have shown that most degradable plastics begin to become thinner, lose weight, and lose strength after being exposed to the general environment for 3 months, and gradually break into pieces. . If these fragments are buried in garbage or soil, the degradation effect is not obvious. Plastic refers to the synthetic resin w...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L3/02C08L93/00C08L5/04C08L67/04C08L67/02C08K5/12B29B7/16B29B7/24B29B7/26B29B7/28B29B7/82
CPCC08L97/02C08L67/02B29B7/16B29B7/24B29B7/26B29B7/28B29B7/82C08L2205/025C08L2205/035C08L2201/06C08L2205/16C08L3/02C08L93/00C08L5/04C08L67/04C08K5/12
Inventor 郇伟伟李洁
Owner ZHEJIANG FORESTRY UNIVERSITY
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