Mosquito-repellent and radiation-proof corn stalk fiber gypsum board and production method thereof

Abstract

The invention discloses a mosquito-repellent and radiation-proof corn stalk fiber gypsum board. According to the present invention, corn stalk fibers are soaked with hot water to remove the surface pectin layer, the surface roughness is obviously increased after anaerobic fermentation, and the relative content of the stalk hemicellulose is reduced so as to enhance the adhesion, wherein the production method of the present invention has the advantages of the same effect, no environment pollution and cost saving compared with the traditional alkali treatment method; and the pre-treated corn stalk fibers are subjected to wrapping modification with the modified polyvinyl alcohol, the modified corn stalk fibers completely contact the water during the molding of the gypsum board, and the polyvinyl alcohol on the surface can produce a certain softening or dissolving so as to penetrate into the gypsum matrix around the fibers, such that the fibers and the gypsum matrix are interlaced into the integration along with the water evaporation so as to enhance the interface combination of the corn stalk fibers and the gypsum matrix, improve the mechanical property and the waterproof performance of the product, provide the functions of mosquito repelling, high strength and difficult breaking, and effectively prevent radiation of X ray, gamma ray and the like.

Description

Technical field [0001] The invention relates to the technical field of building materials preparation, in particular to a mosquito-repellent and radiation-proof corn stalk fiber gypsum board and a manufacturing method thereof. Background technique [0002] As one of the traditional cementing materials, gypsum products are widely used in the construction industry because of their light weight, heat insulation, sound insulation, and dimensional stability. However, the strength of gypsum products is relatively low. Fiber gypsum boards made of fiber-reinforced gypsum products are the main trend to improve the overall performance of gypsum products at this stage. Fiber gypsum board is deeply loved by people because of its low price, light weight, moisture-proof, nailable and planable, fire-proof and heat-preserving characteristics. Fiber gypsum board is a new product successfully developed after plaster board has been widely used. Although the product cost is slightly higher than gy...

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