Component-deficient type plant long fiber, and preparation method and application thereof

A missing-type, long-fiber technology, which is applied in the field of component-deficient plant long fibers and its preparation, can solve problems such as high cost, low production efficiency, and environmental hazards, improve weather resistance, reduce production safety hazards, and reduce environmental pollution. pollution effect

Active Publication Date: 2018-12-14
NANJING HIGH TECH UNIV BIOLOGICAL TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a component-deficient plant long fiber to solve the problems of high cost, serious environmental hazards and low production efficiency in the prior art.

Method used

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  • Component-deficient type plant long fiber, and preparation method and application thereof
  • Component-deficient type plant long fiber, and preparation method and application thereof
  • Component-deficient type plant long fiber, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0051] The preparation process is as follows:

[0052] (1) Pulverization: pulverize the wheat straw to obtain a length of 5-10 cm;

[0053] (2) Washing: the wheat straw obtained in step (1) is washed with hot water to remove dust and remove wax;

[0054] (3) Twin-screw dynamic extrusion to prepare long fibers: transport the wheat straw cleaned in step (2) to a twin-screw extrusion kneader, and simultaneously feed steam into the extruder to collect materials for heat preservation and reaction.

[0055] (4) Secondary water washing: washing the material obtained in step (3) to elute components such as hemicellulose and polysaccharide dissociated in step (3).

[0056] (5) Dehydration: Extrude and dehydrate the material after the secondary washing to reduce the moisture to 30%;

[0057] (6) Drying: dry the dehydrated material to make the plant fiber homogeneous and fluffy, and the water content is reduced to 3%wt, wherein the proportion of cellulose is 47%, the proportion of hemi...

Embodiment 1

[0062] The preparation process is as follows:

[0063] (1) Pulverization: pulverize the wheat straw to obtain a length of 5-10 cm;

[0064] (2) Washing: the wheat straw obtained in step (1) is washed with hot water to remove dust and remove wax;

[0065] (3) Twin-screw dynamic extrusion to prepare long fibers: transport the wheat straw cleaned in step (2) to a twin-screw extrusion kneader, and simultaneously feed steam into the extruder to collect materials for heat preservation and reaction.

[0066] (4) Secondary water washing: washing the material obtained in step (3) to elute components such as hemicellulose and polysaccharide dissociated in step (3).

[0067] (5) Dehydration: Extrude and dehydrate the material after the secondary washing to reduce the moisture to 30%;

[0068] (6) Drying: dry the dehydrated material to make the plant fiber homogeneous and fluffy, and the water content is reduced to 3%wt, wherein the proportion of cellulose is 47%, the proportion of hemi...

Embodiment 3

[0082] The preparation process is as follows:

[0083] (1) Pulverization: pulverize the wheat straw to obtain a length of 5-10 cm;

[0084] (2) Washing: the wheat straw obtained in step (1) is washed with hot water to remove dust and remove wax;

[0085] (3) twin-screw dynamic extrusion to prepare long fibers: the wheat straw after step (2) cleaning is transported in the twin-screw extrusion kneading machine, and sodium hydroxide solution (2% w / w) is passed into the extruder at the same time ), collect materials and keep warm for reaction.

[0086] (4) Secondary water washing: washing the material obtained in step (3) to elute components such as lignin and a small amount of hemicellulose dissociated in step (3).

[0087] (5) Dehydration: Extrude and dehydrate the material after the secondary washing to reduce the moisture to 30%;

[0088] (6) Drying: dry the dehydrated material to make the plant fiber homogeneous and fluffy, and the water content is reduced to 3%wt, wherein...

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Abstract

The invention discloses a component-deficient type plant long fiber and a preparation method thereof. The preparation method comprises the following steps: crushing a wood fiber raw material, washingcrushed wood fiber with water, conveying washed crushed wood fiber, together with steam, into a double-screw extrusion thread-rolling machine, collecting a material, and carrying out a heat-preservingreaction; and after completion of the heat-preserving reaction, subjecting an obtained product to secondary washing with water so as to obtain the component-deficient type plant long fiber. Accordingto the invention, the component-deficient type plant long fiber can be effectively produced by mass; meanwhile, the plant long fiber is used to prepare a reinforced wood-plastic composite material, so environmental pollution in the production process is reduced; production safety hazards are reduced; and mechanical properties and weather resistance of the wood-plastic composite material are significantly improved; thus, the component-deficient type plant long fiber provided by the invention has positive significance on the whole wood-plastic industry.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a component-deficient plant long fiber and its preparation method and application. Background technique [0002] Wood-plastic composite material is a composite material with excellent performance made of plant fibers such as agricultural straw and agricultural and forestry processing waste and thermoplastics with special functional modifiers and other additives, and processed by plastic molding. Wood-plastic composites combine many advantages of plant fibers and polymer materials, can replace wood in large quantities, and can effectively alleviate the contradictions of my country's lack of forest resources and shortage of wood supply. At the same time, it also solves the problem of recycling waste resources in plastics and agriculture and forestry industries , is a promising low-carbon, green, recyclable and renewable material. Its main features are: resource utilization of r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/30C08L23/06C08L1/02C08L97/02C08K3/34C08K5/09D01D5/00
CPCC08L23/06C08L2205/16D01D5/00D21B1/30C08L1/02C08L97/02C08K3/34C08K5/09
Inventor 应汉杰唐成伦朱晨杰张晓陈勇庄伟李明
Owner NANJING HIGH TECH UNIV BIOLOGICAL TECH RES INST CO LTD
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