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Activated plant fiber, preparation method thereof and application of activated plant fiber in polylactic acid composite material

A plant fiber and composite material technology, applied in plant fibers, fiber processing, textiles and papermaking, etc., can solve the problem of difficult to coordinate the interface bonding between hydrophilic plant fibers and hydrophobic polylactic acid matrix, and achieve excellent activation effect, increase Triggers active, small range of motion effects

Active Publication Date: 2019-08-16
北京朗净汇明生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that it is difficult to coordinate the interfacial bonding between hydrophilic plant fibers and hydrophobic polylactic acid matrix when preparing plant fiber reinforced polylactic acid composite materials in the prior art, and to provide an activated plant fiber and its Preparation method and application in polylactic acid composite materials

Method used

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  • Activated plant fiber, preparation method thereof and application of activated plant fiber in polylactic acid composite material

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Experimental program
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Effect test

Embodiment 1

[0044] The preparation method of the activated sisal fiber is as follows: the sisal fiber is cut into short fibers of 1mm, and dried to a moisture content of 0.9wt%, and then soaked in the lithium chloride / DMAc system at 80°C for 3h to dissolve the surface The activated sisal fiber is obtained by keeping the lithium chloride / DMAc system, wherein the lithium chloride content in the lithium chloride / DMAc system is 5 wt%.

[0045] The final activated sisal fiber is as figure 1 As shown, it is mainly composed of undissolved sisal fiber body 1 and a coating layer 2 attached to the surface of the sisal fiber body after being dissolved by a solvent. Molecular solution, which is connected with the sisal fiber body through physical and chemical bonds.

Embodiment 2

[0047] The preparation method of the activated bamboo fiber is as follows: the bamboo fiber is cut into short fibers of 2mm, and dried to a moisture content of 0.8wt%, and then soaked in a lithium chloride / DMAc system at 100°C for 2 hours to dissolve the surface and retain chlorine. Lithium chloride / DMAc system was used to obtain activated bamboo fibrils, wherein the content of lithium chloride in the lithium chloride / DMAc system was 12 wt%.

[0048] The final activated bamboo fiber is mainly composed of the bamboo fiber body and the wrapping layer wrapped on the surface of the bamboo fiber body. The wrapping layer is a polymer solution that dissolves bamboo cellulose, lignin and hemicellulose. connected by physical and chemical bonds.

Embodiment 3

[0050] The preparation method of the activated straw fiber is as follows: cutting the straw fiber into short fibers of 5 mm, drying to a moisture content of 0.8 wt%, and then soaking in 1-butyl-3-methylimidazolium chloride salt at 120°C for 0.5 h After the surface is dissolved, the 1-butyl-3-methylimidazolium chloride salt is retained to obtain the activated straw fiber.

[0051] The final activated straw fiber is mainly composed of the straw fiber body and the coating layer wrapped on the surface of the straw fiber body. The coating layer is a polymer solution in which straw cellulose, lignin and hemicellulose are dissolved. connected by physical and chemical bonds.

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Abstract

The invention relates to activated plant fiber, a preparation method thereof and an application of the activated plant fiber in a polylactic acid composite material. The preparation method comprises steps as follows: the plant fiber is pretreated by a solvent, the surface of the plant fiber is dissolved, and then the solvent is reserved; the activated plant fiber mainly comprises a plant fiber body and a wrapping layer which are connected through physical bonds and chemical bonds, and the wrapping layer is a polymer solution. The application is as follows: after the activated plant fiber is prepared, the activated plant fiber, lactide and a catalyst are mixed and subjected to a synchronous reaction on the premise that the anhydrous solvent is retained and a plant fiber / polylactic acid composite material is prepared, or the activated plant fiber, lactide and the catalyst are mixed and subjected to in-situ ring-opening polymerization, a plant fiber / polylactic acid grafted polymer is prepared, then the plant fiber / polylactic acid grafted polymer and polylactic acid are subjected to melt blending, and the plant fiber / polylactic acid composite material is prepared. The method is simple,the activated plant fiber has higher activity, and the finally prepared polylactic acid composite material has excellent performance.

Description

technical field [0001] The invention belongs to the technical field of new materials and their preparation, and relates to an activated plant fiber, its preparation method and its application in polylactic acid composite materials. Background technique [0002] Due to the long degradation cycle of solid waste generated after use, plastic products have seriously threatened the living environment of human beings and have become a public hazard in the world. Therefore, it is of great significance to study the development of biodegradable plastics based on renewable resources. Polylactic acid material is the most active environment-friendly material in recent years. It has the outstanding advantages of not relying on petroleum as a raw material source, good biocompatibility, and degradability. It is widely used in packaging, textiles, agriculture, and biomedical fields. However, its inherent defects such as high brittleness and poor impact strength have become the bottleneck res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/13D06M13/473C08L67/04C08L97/02C08L1/02C08G63/08C08J5/06D06M101/06D06M101/04
CPCC08G63/08C08J5/06C08J2367/04C08J2401/02C08J2497/02C08L67/04C08L2205/16D06M11/13D06M13/473D06M2101/04D06M2101/06C08L97/02C08L1/02Y02P20/54
Inventor 马博谋王学利何勇李乃强俞建勇
Owner 北京朗净汇明生物科技有限公司
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