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A Method for Improving the Interfacial Adhesion of Hemp/Resin Composites

A resin composite material and bonding technology, applied in the biochemical treatment of enzymes/microbes, liquid-repellent fibers, plant fibers, etc., can solve the problem of chemical harmful substance residues, prone to homopolymerization reactions, and reduce the utilization rate of monomers To achieve the effects of strong substrate selectivity, excellent surface hydrophobicity, and improved interfacial adhesion and compatibility

Active Publication Date: 2021-07-16
SHAOXING UNIVERSITY
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  • Application Information

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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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  • A Method for Improving the Interfacial Adhesion of Hemp/Resin Composites
  • A Method for Improving the Interfacial Adhesion of Hemp/Resin Composites
  • A Method for Improving the Interfacial Adhesion of Hemp/Resin Composites

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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 application relates to a method for improving the interfacial adhesion of hemp / resin composite materials, and belongs to the technical field of preparation or chemical treatment of modified cellulose or other cellulose derivatives. The hemp fabric is placed in a buffer solution containing laccase, TEMPO and aliphatic amine monomers, so that the hydrophobic exogenous amine monomers are grafted onto the lignin and cellulose on the surface of the hemp fiber respectively; Wash with water, then remove the unreacted monomers adsorbed on the hemp fiber, and dry at room temperature. Applying this application to the finishing of mechanical properties of composite materials not only endows hemp fibers with excellent surface hydrophobic properties, but also improves the interfacial bonding and compatibility between fibers and matrix in hemp-reinforced resin-based composite materials.

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 Patents(China)
IPC IPC(8): D06M13/325D06M16/00C08L67/04C08L1/02C08L97/02C08J5/06D06M101/06D06M101/04
CPCC08J5/06C08J2367/04C08J2401/02C08J2497/02D06M13/325D06M16/003D06M2101/04D06M2101/06D06M2200/12
Inventor 董爱学孟秋杰王维明胡玲玲钱红飞刘越
Owner SHAOXING UNIVERSITY
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