Lightweight and fatigue-resisting corn straw fiber gypsum board and manufacturing method thereof
A corn stalk fiber, fatigue-resistant technology, applied in the field of light-weight fatigue-resistant corn stalk fiber gypsum board and its production, can solve the problem of increasing the water absorption rate of the fiber gypsum board, high alkali treatment cost, polluting the environment, reducing the service life of the gypsum board, etc. problems, to achieve the effects of improving mechanical properties and waterproof performance, reducing relative content and long service life
Inactive Publication Date: 2017-01-04
宣伟
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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
Method used
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Experimental program
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Effect test
Embodiment Construction
[0015] The light-weight fatigue-resistant corn stalk fiber gypsum board is characterized in that it is made of the following raw materials in parts by weight: desulfurized building gypsum 100, polyvinyl alcohol 7.7, corn stalk fiber 8.3, carbon fiber 1, yellow sand 3, Tungoleic acid 2.1, tar residue 3, cottonseed hull 2, sodium lauryl sulfate 0.5, iron oxide red 0.6, starch ether 1.6, cashew nut shell oil 1.4, nano-tea polyphenol 0.5, appropriate amount of water.
[0016] The preparation method comprises the following steps:
[0017] (1) Soak corn stalk fibers in hot water at 60-70°C for 10-12 hours, filter and put them into the fermentation tank, add tar residue, oleic acid, and cottonseed hulls for anaerobic fermentation for 7-10 days, filter and dry, and crush to length 10-20mm;
[0018] (2) Stir polyvinyl alcohol with water, heat to boiling and stir until completely dissolved to obtain 8wt% polyvinyl alcohol solution, add cashew nut shell oil, nano-tea polyphenol, sodium ...
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Abstract
The invention discloses a lightweight and fatigue-resisting corn straw fiber gypsum board. Corn straw fibers are immersed by hot water to remove pectin layers on the surfaces; after anaerobic fermentation is carried out, the surface roughness is obviously increased, the relative content of straw hemicellulose is reduced and the adhesive capacity is enhanced; compared with an alkali treatment method in a traditional invention, the effect is the same, the environment is not polluted and the cost is saved; after polyvinyl alcohol is subjected to modification treatment, pre-treated corn straw fibers are subjected to coating modification; when the gypsum board is molded, modified corn straw fibers are in sufficient contact with moisture, and the polyvinyl alcohol on the surface of the modified corn straw fibers is softened or dissolved to a certain extent, and penetrates into a gypsum matrix around the fibers; the fibers and the gypsum matrix are interwoven together along the evaporation of the moisture and interface bonding of the corn straw fibers and the gypsum matrix is enhanced; the mechanical property and waterproof property of a product are improved; the lightweight and fatigue-resisting corn straw fiber gypsum board has the advantages of light weight, fatigue resistance and long service life.
Description
technical field [0001] The invention relates to the technical field of preparation of building materials, in particular to a lightweight fatigue-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. Althoug...
Claims
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IPC IPC(8): C04B28/14C04B18/24C04B20/02C04B20/10C04B111/40
CPCC04B20/02C04B20/1033C04B28/144C04B2111/40C04B2201/50C04B18/24C04B14/386C04B14/068C04B14/308C04B24/383C04B20/1022Y02W30/91
Inventor宣伟
Owner宣伟