A kind of rigid biomass composite material and preparation method thereof

Abstract

The invention belongs to the technical field of utilization of biomass materials and particularly relates to a rigid biomass composite material which has the advantages of being low in coefficient of linear thermal expansion and creep-resistant. The rigid biomass composite material is prepared from a biomass material with larger length-diameter ratio as a main body and a PE / ABS / PA alloy with excellent combination property as a plastic adhesive, and has lower coefficient of linear thermal expansion and excellent creep resistance.

Description

technical field [0001] The invention belongs to the technical field of biomass material utilization, and in particular relates to a rigid composite material using biomass as a raw material. The material has the advantages of low linear thermal expansion coefficient and creep resistance. Background technique [0002] Biomass materials use woody plants, grasses, vines and their processing residues and wastes as raw materials, and use plastic components as adhesives, supplemented with additives, through physical and chemical processes such as granulation and extrusion. And biology and other high-tech means to process and manufacture new composite materials with excellent performance, high added value, green and environmental protection. Such as lignocellulose, plant cellulose, peanut shells, straw, wood chips, rice husks, etc. can be used as raw materials for synthetic biomass materials. Biomass materials have the advantages of a wide range of raw materials and can be complete...

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Problems solved by technology

However, the linear thermal expansion coefficient of PE is as high as 10×10 -5 / ℃-20×10 -5 / °C, and the creep resistance, wear resistance, strength and hardness are relatively poor, which makes PE-based biomass building materials have the same problem

[0005] Compared with PE, biomass composite materials produced by other plastics also have their own advantages and disadvantages: PP-based biomass building materials have better strength, hardness, and creep resistance, but they are more brittle and less resistant to low temperature than PE. Aging, and the coefficient of linear thermal expansion is high; PVC-based biomass building materials contain halogens, which will release a large amount of toxic gases when burned, so it is considered to be the most environmentally destructive of thermoplastic materials; ABS and PA-based biomass building materials There is less industrial production, among which the outstanding feature of ABS is its low melting point (100°C-120°C), which will not damage the properties of biomass materials during processing, and has high hardness and strength, and its linear thermal expansion coefficient is low, only 7.3×10 -5 / ℃, is an excellent plastic adhesive, and the disadvantages of ABS are obvious, such as weak durability and high cost; compared with the previous plastics, the most prominent feature of PA is its strength, hardness and creep resistance. However, its melting point is high, and the processing temperature is 240°C-260°C, which cannot avoid biomass burning

It can be seen that due to some defects of the existing common biomass composite materials as binder materials, although the new composite materials obtained have certain rigid properties, their low linear thermal expansion and creep resistance properties are poor. Slightly insufficient, which also limits its application field to a certain extent

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