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Sound absorption material applied to rail transit and preparation method thereof

A technology of sound-absorbing materials and rail transit, applied in the field of sound-absorbing materials, can solve the problems of cost control and further research of unfavorable sound-absorbing materials, narrow material selection, etc., and achieve rich raw materials, simple preparation methods, and good sound-absorbing effects Effect

Inactive Publication Date: 2021-03-16
JIANGSU BIDE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the raw material used in this method is iron tailings, and the selection of materials is very narrow, which is not conducive to the cost control and further research of large-scale production of sound-absorbing materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method for a sound-absorbing material applied to rail transit, comprising the following steps:

[0026] A. Calcining natural vermiculite at 480°C for 3.5 hours, cooling naturally to obtain expanded vermiculite, and grinding it into powder;

[0027] B. Put the expanded vermiculite powder into hydrogen peroxide and soak for 2.2 hours, then wash with water and dry;

[0028] C. After the dried expanded vermiculite powder and strong alkali are mixed uniformly in proportion, carry out secondary roasting for 1.5h;

[0029] D, the expanded vermiculite powder after secondary roasting and chlorinated paraffin are added in deionized water jointly, make stable expanded vermiculite suspension;

[0030] E, slowly add the aqueous solution of zwitterionic surfactant in the expanded vermiculite suspension, stir simultaneously 50min, make milling raw material;

[0031] F, import the prepared milling raw material into the nano sand mill, and grind for 70 minutes by means o...

Embodiment 2

[0040] A preparation method for a sound-absorbing material applied to rail transit, comprising the following steps:

[0041] A. Roasting natural vermiculite at 500°C for 3 hours, cooling naturally to obtain expanded vermiculite, and grinding it into powder;

[0042] B. Put the expanded vermiculite powder into hydrogen peroxide and soak for 2.5 hours, then wash with water and dry;

[0043] C, after the dried expanded vermiculite powder and strong alkali are mixed evenly in proportion, carry out secondary roasting for 1h;

[0044] D, the expanded vermiculite powder after secondary roasting and chlorinated paraffin are added in deionized water jointly, make stable expanded vermiculite suspension;

[0045] E, slowly add the aqueous solution of zwitterionic surfactant in the expanded vermiculite suspension, stir simultaneously 60min, make milling raw material;

[0046] F, import the prepared milling raw material into the nano sand mill, and grind for 60 minutes by means of the hi...

Embodiment 3

[0055] A preparation method for a sound-absorbing material applied to rail transit, comprising the following steps:

[0056] A, 400 ℃ roasting natural vermiculite 4h, make expanded vermiculite after natural cooling, grind into powder;

[0057] B. Put the expanded vermiculite powder into hydrogen peroxide and soak for 2 hours, then wash with water and dry;

[0058] C, after the dried expanded vermiculite powder and strong alkali are mixed evenly in proportion, carry out secondary roasting 2h;

[0059] D, the expanded vermiculite powder after secondary roasting and chlorinated paraffin are added in deionized water jointly, make stable expanded vermiculite suspension;

[0060] E, slowly add the aqueous solution of zwitterionic surfactant in the expanded vermiculite suspension, stir 40min simultaneously, make milling raw material;

[0061] F, import the prepared grinding raw material into the nano sand mill, and grind for 90 minutes by means of the high-speed collision, friction a...

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Abstract

The invention discloses a preparation method of a sound absorption material applied to rail transit, which comprises the following steps: roasting and grinding natural vermiculite, soaking with hydrogen peroxide, washing and drying; adding strong base for secondary roasting; adding the expanded vermiculite powder and chlorinated paraffin into deionized water together to prepare a stable expanded vermiculite suspension, then adding a zwitterionic surfactant, carrying out wet grinding to obtain micro-nano expanded vermiculite powder, and finally, carrying out centrifugal separation and hot pressmolding to obtain the thin-layer sound absorption material. The raw materials are rich, the preparation method is simple, the average sound absorption coefficient of the obtained sound absorption material can reach 0.5 or above even under the condition that the thickness is 10 mm, and the sound absorption effect is very good.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing materials, in particular to a sound-absorbing material applied to rail transit and a preparation method thereof. Background technique [0002] The rapid development of high-rise buildings puts forward higher requirements for the light weight and high strength of partition walls and the reduction of volume ratio occupancy. Therefore, the research and development of thin and light-weight sound-absorbing and insulating materials for buildings has become a frontier research hotspot in the field of environmental noise control. . The sound-absorbing design requirements in many small spaces and cabins also put forward higher requirements for thin and efficient sound-absorbing materials. The development of new porous sound-absorbing materials has become a trend in the development of sound-absorbing and noise-reducing environmental functional materials, which is of great significance for improving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C04B20/02C04B14/20C04B111/52
CPCC04B30/00C04B20/06C04B20/026C04B20/023C04B2111/52C04B14/204C04B24/36C04B14/202
Inventor 王恺蔡国强贾缘平薛晓明郭锦涛
Owner JIANGSU BIDE SCI & TECH CO LTD
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