A corn straw fiber gypsum board having sound-absorbing and noise-reducing functions and a manufacturing method thereof

Abstract

A corn straw fiber gypsum board having sound-absorbing and noise-reducing functions is disclosed. Corn straw fibers are soaked with hot water to remove surface pectin layers. After anaerobic fermentation, the degree of surface roughness is obviously increased, the relative content of hemicellulose of the straw is reduced, and adhesive capability is enhanced. Compared with traditional alkali processing methods, effects are same, environment pollution is avoided and the cost is saved. The pretreated corn straw fibers are clad with modified polyvinyl alcohol for modification. During molding of the gypsum board, the modified corn straw fibers are in full contact with water, and the surface polyvinyl alcohol is softened to a certain degree or dissolved, penetrated into a gypsum substrate around the fibers, and interweaves the fibers and the gypsum substrate along with water evaporation, and therefore interface bonding of the corn straw fibers and the gypsum substrate is enhanced, mechanical properties and a waterproof property of a product are improved, and a product has characteristics of high absorptivity, good warm-keeping effects, significant sound-absorbing and noise-reducing effects, and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of building materials, in particular to a corn straw fiber gypsum board with sound-absorbing and noise-reducing functions 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 w...

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