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In-situ modified plant long fibers as well as preparation method and application thereof

An in-situ modification and long-fiber technology, applied in the field of materials, can solve problems such as high cost, low production efficiency, and environmental hazards, and achieve the effects of improving weather resistance, improving compatibility, and reducing environmental pollution

Active Publication Date: 2018-11-23
NANJING UNIV OF TECH
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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 an in-situ modified 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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  • In-situ modified plant long fibers as well as preparation method and application thereof
  • In-situ modified plant long fibers as well as preparation method and application thereof
  • In-situ modified plant long fibers as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The preparation process is as follows:

[0061] (1) crushing: the wheat straw raw material, the material obtained after separating and removing the root, is crushed to obtain crushed material with a length of less than 30cm;

[0062] (2) washing with water once: the material obtained in step (1) is washed with water to remove dusty soil;

[0063] (3) twin-screw kneading: the material obtained in step (2) is directly put into the heated twin-screw extrusion thread rolling machine to obtain a plant long fiber with a length between 0.5-10cm and a diameter of less than 0.5cm;

[0064] (4) Secondary washing: by washing the material obtained in step (3), the hemicellulose, polysaccharide and other impurities dissociated by high temperature shearing in the screw are eluted, and the ash is washed away again at the same time;

[0065] (5) Dehydration: dehydration to reduce the moisture to 15%wt;

[0066] (6) drying: drying, so that the plant fiber is homogeneous and fluffy, an...

Embodiment 2

[0072] The preparation process is as follows:

[0073] (1) crushing: the wheat straw raw material, the material obtained after separating and removing the root, is crushed to obtain crushed material with a length of less than 30cm;

[0074] (2) washing with water once: the material obtained in step (1) is washed with water to remove dusty soil;

[0075] (3) twin-screw kneading and modification: the material obtained in step (2) is directly put into the heated twin-screw extrusion thread rolling machine to obtain plant long fibers with a length of 0.5-10 cm and a diameter of less than 0.5 cm. During the kneading process, 5% silane coupling agent KH550 of the raw material of wheat straw was added;

[0076] (4) Secondary washing: by washing the material obtained in step (3), the hemicellulose, polysaccharide and other impurities dissociated by high temperature shearing in the screw are eluted, and the ash is washed away again at the same time;

[0077] (5) Dehydration: dehydrat...

Embodiment 3

[0084] The preparation process is as follows:

[0085] (1) crushing: the wheat straw raw material, the material obtained after separating and removing the root, is crushed to obtain crushed material with a length of less than 30cm;

[0086] (2) washing with water once: the material obtained in step (1) is washed with water to remove dusty soil;

[0087] (3) twin-screw kneading and modification: the material obtained in step (2) is directly put into the heated twin-screw extrusion thread rolling machine to obtain plant long fibers with a length between 0.5-10cm and a diameter of less than 0.5cm;

[0088] (4) Secondary washing: by washing the material obtained in step (3), the hemicellulose, polysaccharide and other impurities dissociated by high temperature shearing in the screw are eluted, and the ash is washed away again at the same time;

[0089] (5) Dehydration: dehydration to reduce the moisture to 15%wt;

[0090] (6) drying: drying, so that the plant fiber is homogeneou...

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Abstract

The invention discloses a preparation method of in-situ modified plant long fibers. The preparation method comprises the following steps: after crushing woody fiber raw materials and washing with water, conveying the woody fiber raw materials and a modifying agent solution into a double-screw extrusion thread rolling machine; collecting the materials and carrying out heat-insulation reaction; after finishing the heat-insulation reaction, carrying out secondary water washing on a product to obtain the in-situ modified plant long fibers. Compared with the prior art, the preparation method can beused for effectively producing the surface modified plant long fibers in batches, and an enhanced wood-plastic composite material is prepared through the plant long fibers, so that the environment pollution in a production process is reduced and potential safety hazards of production are reduced; the compatibility of plant fibers and thermoplastic plastic is improved. The mechanical properties and weather resistance of the wood-plastic composite material are remarkably improved so that the preparation method has positive significance on a whole wood-plastic industry.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to an in-situ modified plant long fiber and a preparation method and application thereof. Background technique [0002] One of the important strategic decisions for the sustainable development of the wood industry in this century. After nearly half a century of research and application of wood-plastic composite materials, wood-plastic composite materials have achieved unprecedented development. Wood-plastic composite material is a composite material with excellent performance made of agricultural straw and agricultural and forestry processing waste and other plant fibers and thermoplastics with special functional modifiers and other auxiliaries through plastic molding processing. Wood-plastic composite material combines many advantages of plant fibers and polymer materials, and can replace wood in a large amount, which can effectively alleviate the contradiction between the lac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L97/02C08K3/34C08K5/09C08J5/06
CPCC08J5/06C08J2323/06C08J2497/02C08K5/09C08K3/34
Inventor 朱晨杰张晓应汉杰庄伟唐成伦李明陈勇张宇
Owner NANJING UNIV OF TECH
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