Method for improving cohesiveness of hemp/resin composite material interface

A resin composite material and bonding technology, applied in the direction of enzyme/microbial biochemical treatment, liquid repellent fiber, biochemical fiber treatment, etc., can solve the problem of residual chemical harmful substances, prone to homopolymerization reaction, and reduce the utilization of monomers efficiency and other issues, to achieve the effects of strong substrate selectivity, environmentally friendly processing, and significant modification effect

Active Publication Date: 2019-03-19
SHAOXING UNIVERSITY
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Problems solved by technology

[0007] (1) The use of physical / chemical modification methods can easily cause fiber damage, residues of harmful chemical substances, and environmental pollution.
[0008] (2) The range of substrates that can be oxidized by laccase itself is limited. For example, laccase alone can only oxidize the phenolic structure lignin in lignocellulosic pulp, and the grafting rate is low; body utilization, low grafting efficiency

Method used

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  • Method for improving cohesiveness of hemp/resin composite material interface
  • Method for improving cohesiveness of hemp/resin composite material interface
  • Method for improving cohesiveness of hemp/resin composite material interface

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Embodiment Construction

[0024] The following uses jute fiber as the representative of hemp fiber, octadecylamine as the hydrophobic exogenous amine monomer, and polylactic acid (PLA) resin to explain this plan in detail.

[0025] Jute fibers were modified by laccase / TEMPO catalyzed grafting hydrophobization with octadecylamine as an exogenous monomer, and then melt-blended with polylactic acid (PLA) resin-extrusion injection molding to prepare jute / PLA composites.

[0026] Add 0.50g laccase, 0.70g TEMPO, 1.35g octadecylamine and 10g jute fiber to 500mL acetic acid-sodium acetate buffer solution with pH value 4.5 at the same time, react at 50°C for 12h, then fully wash with water, extract with ethanol Wash and dry at room temperature.

[0027] (1) Elemental analysis of jute fiber

[0028] Table 1 Element content and carbon-oxygen ratio comparison table after different treatment

[0029]

[0030] The enzymatic grafting of octadecylamine to jute fiber increases the nitrogen content, so the grafting...

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Abstract

The invention relates to a method for improving cohesiveness of a hemp/resin composite material interface, and belongs to the technical field of preparation or chemical treatment of modified celluloseor other cellulose derivatives. The method includes: placing a hemp fabric in a buffering solution which contains laccase, TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) and fatty amine monomers, enabling hydrophobic exogenous amine monomers to be grafted on xylogen and cellulose on a surface of the hemp fabric, taking out fibers after reaction is over, fully washing with water, removing unreactedmonomers absorbed on the hemp fibers, and drying at a room temperature. By applying the method to mechanical property treatment of the composite material, excellent surface hydrophobicity of the hempfibers is provided, and interface cohesiveness and compatibility between the fibers and a matrix in a hemp-enhanced resin matrix composite material are improved.

Description

technical field [0001] The application relates to a method for improving the interfacial adhesion of hemp / resin composite materials, which belongs to the technical field of composite materials. Background technique [0002] Hemp fiber refers to the general term for fibers obtained from various hemp plants, including the bast fiber of the dicotyledonous plant cortex and the leaf fiber of the monocotyledonous plant. The bast fibers mainly include ramie, flax, jute, kenaf, green hemp, kenaf, hemp, apocynum and kenaf, etc., and the leaf fibers include sisal and abaca, etc., which are composed of cellulose, hemicellulose, Composed of chemical components such as lignin, pectin, fat wax and ash, it belongs to natural lignocellulose fiber. Hemp is one of the earliest textile raw materials used by humans. It is the second largest fiber category after cotton in natural fibers. The world's output is about 5 million tons, of which jute accounts for about 60%-70% of the total output. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/325D06M16/00C08L67/04C08L1/02C08L97/02C08J5/06D06M101/06D06M101/04
CPCC08J5/06C08J2367/04C08J2401/02C08J2497/02D06M13/325D06M16/003D06M2101/04D06M2101/06D06M2200/12
Inventor 董爱学王维明胡玲玲钱红飞刘越
Owner SHAOXING UNIVERSITY
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