Light-weight abrasion-resistance cornstalk fiber gypsum board and manufacture method thereof

Abstract

The invention discloses a light-weight abrasion-resistance cornstalk fiber gypsum board. The method comprises the following steps: soaking cornstalk fibers with hot water, and removing the pectin layer on the surface of the cornstalk fibers;, wherein after anaerobic fermentation, the surface roughness degree of the cornstalk fibers is remarkably increased, the relative content of stalk hemicellulose is reduced, and the adhesive capacity of the cornstalk fibers is reinforced. Compared with a traditional alkali treatment method, the method has the advantages that effects of preventing environment pollution and saving cost can be achieved while the effects same as the traditional method are achieved, the pretreated cornstalk fibers are subjected to coating modification after polyvinyl alcohol is modified, and the modified cornstalk fibers are sufficiently contacted with moisture during molding of the gypsum board, the polyvinyl alcohol on the surface of the cornstalk fibers is softened or dissolved to a certain extent and can infiltrate into the gypsum substrate around the fibers, and fibers and the gypsum substrate can be interwoven together along with moisture evaporation, so that the interface combination of cornstalk fibers and the gypsum substrate can be reinforced, and the mechanical performance and waterproof performance of the product can be improved. The light-weight abrasion-resistance cornstalk fiber gypsum board has the advantages of light weight, abrasion resistance, good damp-proofing adhesion performance and excellent weather resistance.

Description

technical field [0001] The invention relates to the technical field of preparation of building materials, in particular to a lightweight and wear-resistant corn straw fiber gypsum board and a manufacturing method thereof. Background technique [0002] As one of the traditional cementitious materials, gypsum products are widely used in the construction industry due to their excellent properties such as light weight, heat insulation, sound insulation, and dimensional stability. However, the strength of gypsum products is low, and the fiber gypsum board made by using fiber reinforced gypsum products is the main trend to improve the comprehensive performance of gypsum products at this stage. Fiber gypsum board is very popular because of its low price, light weight, moisture-proof, nailable and planable, fireproof and thermal insulation. Fiber gypsum board is another new product that has been successfully developed after the paper-faced gypsum board has been widely used. Althou...

AI Technical Summary

Problems solved by technology

[0004] The article "Effect of polyvinyl alcohol-coated corn stalk fiber on the performance of gypsum" carried out alkali pretreatment on corn stalk fiber to remove low molecular substances such as pectin, lignin and hemicellulose on the surface of the fiber, enhance its bonding ability, and The corn stalk fiber was coated and modified with polyvinyl alcohol to improve its interfacial bonding with gypsum, so that the mechanical properties and waterproof performance of the corn stalk fiber / gypsum composite material were improved, but after NaOH treatment, the fiber swelled and The increase in the middle cavity can increase the water absorption rate of the fiber gypsum board and reduce the service life of the gypsum board. Another phenomenon is that the cells in the fiber are destroyed and affect the strength of the fiber, which is not conducive to its strengthening effect, and the high cost of alkali treatment pollutes the environment. , it is necessary to improve the existing production process and ingredient composition to prepare a fiber gypsum board with comprehensive functions, durability, wear resistance, thermal insulation, strong adsorption, safety and non-toxicity