Modification and use methods for straw biomass

Abstract

The invention discloses a straw-derived composite material, i.e., proper-plasticity modified straw biomass obtained through carrying out modification on straw powder by using ore powder and adjuvants, new materials formed through further compounding the modified straw biomass and plastics and a method for producing straw-plastics products by using the new materials. According to the method, firstly, the straw biomass is crushed to certain fineness, then, the straw biomass powder is mixed with the ore powder in the presence of an esterifying agent and a coupling agent so as to form modified straw powder, and the modified straw powder is further compounded with the plastics in the presence of the adjuvants such as a grafting agent so as to form the new materials, which replace wood-plastics and plastics, and new products.

Description

technical field [0001] The invention belongs to the fields of agriculture and plastic industry, and specifically relates to a straw-sourced composite material, that is, to modify the straw powder with ore powder and additives to obtain a plastic-adaptive modified straw powder, and to further combine the modified straw powder with plastics. New materials and straw plastic products formed by compounding. Background technique [0002] Straw biomass has a huge stock, which is both a waste and a resource, so it has a wide range of application potential. However, no matter using straw to make biogas or process pulp, it will bring waste residue and liquid, leading to "waste from waste". It is of great significance to utilize straw biomass at full price or to utilize waste residue (ash) in the process of straw processing. Straw biomass instead of lignocellulose to prepare straw plastic products is one of the ways to solve the above problems. [0003] In view of the fact that the ...

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Problems solved by technology

For example, the patent application with application number 200410021704.3 uses 100 parts of high-pressure polyethylene with a ratio of 10-60 parts of heavy calcium powder to prepare modified plastics, which have the characteristics of wear resistance, impact resistance and anti-aging, but this patent does not add straw powder

The patent application with the application number 200610030671.8 uses ultra-fine wood powder, ultra-fine ore powder and waste plastics to melt and stir to form products directly, but this patent does not form modified straw powder materials, but directly produces finished products

The patent application with application number 201310029919.9 injects montmorillonite suspension into wood powder to strengthen wood powder, improve the interfacial compatibility of wood-plastic composite materials, and improve the use efficiency of wood powder. However, wood-plastic products need to be dried during the production process. Obviously, it does not match the plasticity characteristics pursued by straw plastic materials

[0004] The main problems facing the development of straw-plastic materials to replace wood-plastic materials at full price are: first, straw has a porous structure, and the total bulk density is about 0.4, while the total bulk density of plastic is about 1.0; second, the ultra-microstructure of straw Complexity emerges, especially the presence of hydrophilic groups affects the plasticity of straw biomass

Due to the above reasons, when straw powder is mixed with the plastic base material, it is easy to separate and agglomerate with the plastic base material, resulting in the destruction of the internal order structure of the plastic, which may reduce the strength of the composite material.