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A kind of preparation method of composite plant fiber biodegradable material

A technology of plant fibers and degradable materials, which is applied in the field of preparation of composite plant fiber biodegradable materials, can solve the problems of poor comprehensive performance of composite materials and poor compatibility of composite polylactic acid materials, so as to increase the effective contact area, The effect of balanced performance and improved compatibility

Active Publication Date: 2020-12-22
北京荣宝森瑞塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing a composite plant fiber biodegradable material, which solves the problem that the existing plant fiber composite polylactic acid material has poor compatibility and leads to poor comprehensive performance of the final composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of a composite plant fiber biodegradable material, comprising the following steps:

[0021] (1) Coir fiber is cut into short fibers of 10-15mm, add water according to the ratio of 1g:5ml, then add 0.1% cellulase and 0.2% pectinase at 35-40°C, react for 10min, and carry out alkali treatment, pretreated coir fiber;

[0022] (2) ramie fiber is cut into the staple fiber of 10-15mm, carries out low-temperature plasma treatment, then carries out alkali treatment, obtains pretreatment ramie fiber;

[0023] (3) According to parts by weight, get 10 parts of pretreated coconut shell fiber, 5 parts of pretreated ramie fiber, 55 parts of polylactic acid, 5 parts of starch, 4 parts of glycerin, 6 parts of rubber, set aside;

[0024] (4) The above-mentioned weighed raw materials were then melt-blended for 8 minutes on an open mill, and the temperature was 160° C.;

[0025] (5) Preheat the molten blend on a flat vulcanizing machine and exhaust it, then keep the ...

Embodiment 2

[0032] A preparation method of a composite plant fiber biodegradable material, comprising the following steps:

[0033] (1) Coir fiber is cut into short fibers of 10-15mm, add water according to the ratio of 1g:5ml, then add 0.1% cellulase and 0.2% pectinase at 35-40°C, react for 12min, and carry out alkali treatment, pretreated coir fiber;

[0034] (2) ramie fiber is cut into the staple fiber of 10-15mm, carries out low-temperature plasma treatment, then carries out alkali treatment, obtains pretreatment ramie fiber;

[0035] (3) According to parts by weight, get 11 parts of pretreated coconut shell fiber, 6 parts of pretreated ramie fiber, 55 parts of polylactic acid, 6 parts of starch, 3 parts of glycerin, 7 parts of rubber, for subsequent use;

[0036] (4) Then carry out melt-blending 9min on the above-mentioned weighed raw material on the open mill, the temperature is 170 ℃;

[0037] (5) Preheat the melted blend on a flat vulcanizing machine and exhaust it, then keep th...

Embodiment 3

[0044] A preparation method of a composite plant fiber biodegradable material, comprising the following steps:

[0045] (1) Cut the coconut shell fiber into short fibers of 10-15mm, add water according to the ratio of 1g:5ml, then add 0.1% cellulase and 0.2% pectinase at 35-40°C, react for 13min, and carry out alkali treatment, pretreated coir fiber;

[0046] (2) ramie fiber is cut into the staple fiber of 10-15mm, carries out low-temperature plasma treatment, then carries out alkali treatment, obtains pretreatment ramie fiber;

[0047] (3) According to parts by weight, get 13 parts of pretreated coconut shell fiber, 8 parts of pretreated ramie fiber, 57 parts of polylactic acid, 7 parts of starch, 4 parts of glycerin, 5 parts of rubber, for subsequent use;

[0048] (4) The above-mentioned weighed raw materials were then melt-blended for 10 minutes on an open mill, and the temperature was 180° C.;

[0049] (5) Preheat the melted blend on a flat vulcanizing machine and exhaus...

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Abstract

The invention relates to a preparation method of a composite plant fiber biodegradable material, which comprises the following steps: (1) carrying out cellulase and pectinase enzymolysis and alkali treatment on coconut shell fibers to obtain pretreated coconut shell fibers; (2) Ramie fiber is carried out low-temperature plasma treatment, then carries out alkali treatment, obtains pretreatment ramie fiber; (3) by weight, get pretreatment coir fiber 10-15 parts, pretreatment ramie fiber 5-10 parts, polylactic acid 50-15 parts 60 parts, 5-8 parts of starch, 3-5 parts of glycerin, 5-8 parts of rubber, for subsequent use; (4) then melt and blend the above-mentioned weighed raw materials on an open mill; The melted blend is kept under pressure, the molding temperature is , and finally it is formed into a plate after being water-cooled, and the composite plant fiber biodegradable material is obtained. The composite plant fiber biodegradable material of the present invention has good comprehensive properties, compared with the composite plant fiber biodegradable material which is treated with alkali alone.

Description

technical field [0001] The invention relates to a preparation method of a composite plant fiber biodegradable material, belonging to the field of composite degradable materials. Background technique [0002] Biodegradable polymers can generally be divided into two categories: natural and synthetic. In the synthesis of degradable polymers, polylactic acid, polyglycolic acid, poly 3-hydroxybutyrate, copolyester, polylactic acid-polyethylene glycol block copolymer, etc. are commonly used. Among them, polylactic acid (PLA) is the most promising new green polymer material with the most outstanding comprehensive performance. Polylactic acid has a wide range of sources of raw materials and does not depend on petroleum resources. It has good biodegradability. The degraded products are small molecules such as carbon dioxide and water, which can be reused by nature. Therefore, polylactic acid is a recycling Economical green environment-friendly polymer material. However, the share ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L3/02C08L3/04C08L97/02C08L1/02C08L21/00C08K5/053C08J5/06
CPCC08J5/06C08J2367/04C08J2401/02C08J2403/02C08J2497/02C08L67/04C08L2201/06C08L2205/035C08L2205/08C08L2205/16C08L3/02C08L3/04C08L97/02C08L1/02C08L21/00C08K5/053
Inventor 马志国郑书芬
Owner 北京荣宝森瑞塑业有限公司
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