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Preparation method of gypsum-based composite sound absorption material

A sound-absorbing material, gypsum-based technology, applied in the field of inorganic non-metallic materials, can solve the problems of fire prevention, weather resistance, strength, sound absorption and sound insulation performance, etc., to achieve excellent sound absorption performance, regular shape, high porosity Effect

Inactive Publication Date: 2019-01-25
宿迁德特材料科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problems of poor fire prevention, weather resistance, strength, sound absorption and sound insulation performance of commonly used sound-absorbing materials in the market, a preparation method of gypsum-based composite sound-absorbing materials is provided

Method used

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Examples

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Embodiment Construction

[0021] Take 300-500g of diatomite, add 3-6L of deionized water, stir at 300-400r / min for 20-30min, then add 30-60g of sulfuric acid with a mass fraction of 98%, and heat to 70-80°C, continue stirring for 20 ~30min, filter the filter residue, wash the filter residue with deionized water until the washing liquid is neutral, then place the filter residue in a drying oven, and dry it at 105-110°C to constant weight to obtain pretreated diatomite, take 10- Put 20kg of phosphogypsum in an electric oven, heat up to 150-200°C at 2-3°C / min, heat-preserve and bake until the free water content is less than 1%, put it into a ball mill after cooling to room temperature, and mill at 200-300r / min Up to a specific surface area of ​​3000-4000cm 2 / g, to obtain pretreated phosphogypsum, dry the straw stalks naturally, put them into a shredder and cut them into 2.0mm×40.0mm fragments, take 75-100g of straw stalks and put them into an electric oven, and use 2~ 3°C / min, heat up to 120-180°C and b...

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Abstract

The invention relates to a preparation method of a gypsum-based composite sound absorption material, and belongs to the technical field of inorganic nonmetal materials. According to the preparation method, a straw stalk fiber is utilized, the longitudinal direction of the straw stalk fiber is a bundle fiber formed by combining multiple microfine fibers and in a spiral structure, the mutually arranged and interconnected spiral structure makes the surface of the bundle fiber generate a large number of gaps and meshes, the arrangement is regular by combining diatomite, the shapes are mostly roundand needle-like, and the gaps intercross and form a porous structure with the outside; high ash in straw stalk and high fat, vinegar and resin on the fiber are dried, so that the high ash in the straw stalk and the high fat, vinegar and resin on the fiber are molten out and adhered to the diatomite and gypsum, porous structure with communicated space are formed between the fiber and the gypsum and between the fiber and the diatomite through stacking, the porosity is high, the arrangement order is unified, the shapes are regular, the gaps are communicated with each other, and the porosity of the composite sound absorption material is improved, so that the material has an excellent sound absorption property.

Description

technical field [0001] The invention relates to a preparation method of a gypsum-based composite sound-absorbing material, belonging to the technical field of inorganic non-metallic materials. Background technique [0002] With the rapid development of industry, noise pollution is becoming more and more serious. As one of the key tasks of environmental protection, sound absorption and noise reduction has attracted widespread attention from scientists. With the rapid development of society, noise pollution is becoming more and more serious. Sound-absorbing material is a functional material for building decoration. It has the dual requirements of sound absorption and decoration. It must be beautiful and meet the special requirements of sound absorption. Any material can absorb sound, but the degree of absorption varies greatly. It is usually a material with an average sound absorption coefficient greater than 0.2, which is listed as a sound-absorbing material. [0003] Acco...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/52
CPCC04B28/143C04B2111/52C04B2201/20C04B2201/50C04B14/08C04B18/24C04B14/185C04B2103/408C04B2103/465C04B2103/52C04B2103/44C04B2103/14
Inventor 泰家千
Owner 宿迁德特材料科技有限公司
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