Plasticizing method for plant fiber raw materials

Abstract

The invention relates to a plasticizing method for plant fiber raw materials and belongs to the field of plant fiber raw material processing and application. The invention provides a novel processingtechnology of the plant fiber raw materials, wherein a wood plant fiber raw material has thermoplasticity. The method includes the steps of: 1) adding inorganic acid to crushed plant fiber raw materials with uniform mixing, and feeding the mixture to a plastication device; 2) heating, plasticating and shearing the mixture to obtain a plant fiber base material which can be repeatedly processed. According to the plasticizing method, with the inorganic acid as a plasticizer, the plasticization temperature of the plant fiber raw materials is reduced by means of extrusion and shearing effects of ascrew rod or the plastication device, so that the wood fibers can be directly thermally shaped at 50-240 DEG C and can be compounded with a high-molecular material. The plant fiber raw materials can be effectively applied to the fields such as plastic, wood-plastic composite materials, texture, wood processing, etc. The invention develops the application range of the plant fiber raw materials.

Description

technical field [0001] The invention belongs to the field of processing and application of plant fiber raw materials, and mainly relates to a plasticizing method of plant fiber raw materials. Background technique [0002] At present, non-renewable resources are increasingly in short supply, and the energy crisis is becoming more and more serious. Biomass energy has become a hot spot in international research because of its advantages such as wide sources, strong renewability, and low price. Among them, plant fiber raw materials have become an ideal substitute for fossil resources. [0003] Wood plasticization traditionally refers to replacing the hydroxyl groups in wood with other functional groups by means of esterification and etherification to reduce the hydrogen bonds between components, reduce the bonding between molecules, and destroy cellulose. The crystalline structure of the wood makes the wood soften at a certain temperature and becomes a thermoplastic material. ...

AI Technical Summary

Problems solved by technology

This patent uses sodium ferric tartrate and glycerin to make plant fiber raw materials have the properties of wood-plastic, but the relative cost of sodium ferric tartrate and glycerin is relatively high, and glycerin is not easy to solidify, which is unfavorable for future applications

[0006] Chinese patent CN105504585A discloses a kind of wood-plastic material, which is produced and processed through the raw materials in the following weight ratio: waste polyvinyl chloride 20-40%, plant fiber 10-15%, calcium bicarbonate 15-25%, glue 2 ~7%, lubricant 3~6%, wood powder 2~30%, straw powder 1~22%, polypropylene ester 2~10%, zirconia 1~4%, ruthenium oxide 2~6%, the inventive wood Plastic materials can be processed in one step. However, the wood-plastic material is formed by adding polymer plastics and other plastic materials, relying on the plasticizing properties of plastic polymers, without plasticizing the wood itself.

[0007] Chinese patent CN105694502A discloses a wood-plastic material, which is made of the following raw materials in parts by weight: 30-40 parts of wood powder, 25-35 parts of straw powder, 25-35 parts of plant rattan powder, 10-15 parts of paper powder, old 10-15 parts of plastic pellets, 19-25 parts of polypropylene, 19-25 parts of polyvinyl chloride, 12-18 parts of strengthening agent, 8-13 parts of filler, 8-13 parts of adhesive, the wood-plastic material of this invention is made Simple, making full use of diverse raw materials, but the method of plasticizing wood is still based on mixed plastic polymers, without plasticizing and modifying the wood itself

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