Hard natural fiber/polypropylene rosewood-imitating building material and preparation method thereof

Abstract

The invention relates to a hard natural fiber / polypropylene rosewood-imitating building material and a preparation method, and belongs to the field of preparation of natural fiber composite rosewood-imitating materials. The preparation method of the hard natural fiber / polypropylene rosewood-imitating building material comprises the following steps that redwood color-imitating paste and natural wood fibers are ground and dispersed under a cooking condition, and suction filtration and drying are carried out to obtain dyed wood fibers; acetic anhydride and a catalyst are dissolved in supercritical carbon dioxide, and then are mixed with the dyed wood fibers under the pressure of 10-15 MPa, pressure relief is carried out after the reaction is completed, carbon dioxide is recovered, and a precipitate is separated out to obtain non-polar dyed wood fibers; and the obtained non-polar dyed wood fibers are dispersed in a non-polar dispersion medium, and then are mixed with a polypropylene matrixand an antioxidant, then mixing is carried out, a mixture is taken out, and then the mixture is put into a flat vulcanizing machine for hot-pressing forming to obtain the hard rosewood-imitating building material. The comprehensive use quality of the rosewood-imitating product prepared by using the preparation method is effectively enhanced, a good use value is achieved, and the effect is more vivid.

Description

technical field [0001] The invention relates to a hard natural fiber / polypropylene imitation mahogany building material and a preparation method, belonging to the field of preparation of natural fiber composite imitation wood materials. Background technique [0002] Natural fiber composite wood-like materials are new wood-like materials made of natural plant fiber materials from agricultural and forestry waste, such as wood powder, rice husk, straw, etc., and plastics, collectively referred to as wood-plastic materials. [0003] As we all know, the chemical structure of plant fibers such as wood flour and rice husk powder contains a large number of highly polar hydroxyl groups, and each cellulose ring contains multiple -OH groups. Both polyethylene and polypropylene resins are non-polar. Although PVC resin contains chlorine atoms and has certain polarity, its polarity is much smaller than that of cellulose, so they are two mutually incompatible systems-- Cellulose is a typi...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the technical problems such as poor compatibility between wood powder or wood fiber and non-polar matrix in the current imitation mahogany materials, the first technical problem to be solved by the present invention is to provide a preparation method of hard natural fiber / polypropylene imitation mahogany building materials