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Preparation method for sound absorbing material

A technology of sound-absorbing material and base material, applied in the field of materials, can solve the problems of poor sound-absorbing effect and high cost, and achieve the effect of improving the attraction performance, increasing the binding capacity, and increasing the sound absorption.

Inactive Publication Date: 2019-01-15
赵顺全
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  • Summary
  • Abstract
  • Description
  • 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 sound absorption effect and high cost of the current sound-absorbing materials, the present invention provides a preparation method of sound-absorbing materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A method for preparing a sound-absorbing material, the method comprising the steps of:

[0026] (1) Take the loofah and grind it, add 0.3mol / L hydrogen peroxide to soak for 30min, then put it into the soaking liquid, heat and soak for 2h, filter, wash the filter residue, dry, and collect the dry matter, according to the mass ratio of 17~23:4~ 6: 1~3, take xylene, dry matter, and maleic anhydride into the reactor, and preheat at 40~50°C for 50 minutes;

[0027] (2) After preheating, use nitrogen protection, then add carbon nanotubes with a dry mass of 10-15%, raise the temperature to 55-60°C, stir for 2 hours, discharge, filter, wash the filter cake, and dry , to collect dry matter;

[0028] (3) Put the dried material, water and polyethyleneimine into a container at a mass ratio of 7-9:23-30:5, heat at 50-60°C for 3 hours, then add silane coupling agent and additives, and stir 4h, centrifuge, collect the precipitate, and wash with methanol to obtain the sound-absorbing...

Embodiment 1

[0031] The soaking solution is prepared by stirring and mixing ethylene glycol, phenol and water at a mass ratio of 9:5:15 to obtain the soaking solution.

[0032] The silane coupling agent is a mixture of γ-aminopropyltriethoxysilane and 3-aminopropyltrimethoxysilane in a mass ratio of 7:2; the amount of silane coupling agent added is 6% of the dried material .

[0033] The additive is sodium bicarbonate.

[0034] The protective agent is oleic acid.

[0035] The mixture is formed by mixing ferric chloride, ferrous chloride and chromium nitrate in a mass ratio of 15:19:1.

[0036] A method for preparing a sound-absorbing material, the method comprising the steps of:

[0037] (1) Take the loofah and grind it, add 0.3mol / L hydrogen peroxide to soak for 30 minutes, then put it into the soaking liquid, heat and soak for 2 hours, filter, wash the filter residue, dry, collect the dry matter, according to the mass ratio of 23:6:3, Put xylene, dry matter and maleic anhydride into ...

Embodiment 2

[0042] The soaking solution is prepared by stirring and mixing ethylene glycol, phenol and water at a mass ratio of 8:4:14 to obtain the soaking solution.

[0043] The silane coupling agent is a mixture of γ-aminopropyltriethoxysilane and 3-aminopropyltrimethoxysilane at a mass ratio of 7:1; the amount of silane coupling agent added is 5% of the dried material .

[0044] The additive is ammonium bicarbonate.

[0045] The protective agent is oleic acid.

[0046] The mixture is formed by mixing ferric chloride, ferrous chloride and chromium nitrate in a mass ratio of 14:18:1.

[0047] A method for preparing a sound-absorbing material, the method comprising the steps of:

[0048](1) Take the loofah and grind it, add 0.3mol / L hydrogen peroxide to soak for 30 minutes, put it into the soaking liquid, heat and soak for 2 hours, filter, wash the filter residue, dry, collect the dry matter, according to the mass ratio of 21:5:2, Put xylene, dry matter, and maleic anhydride into the...

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Abstract

The invention relates to a preparation method for a sound absorbing material, belonging to the field of materials. According to the invention, natural loofah sponge is utilized as a carrier material;the loofah sponge has developed pores, good adsorption capacity and good load performance, and is subjected to treatment by hydrogen peroxide and mixing with and soaking in a soaking solution; throughtreatment by the soaking solution, maleic anhydride has improved ability in grafting to loofah sponge, and the modification of maleic anhydride improves the bonding of loofah sponge and polyethyleneimine; then through pre-carbonization, an additive is pyrolyzed to generate gas, and a porous structure is formed on the surface of polyethyleneimine; the polyethyleneimine contains carbon nanotubes and is then combined with a mixture, so polyethyleneimine is redissolved in water; added tartaric acid is complexed with excess ferrous ions and chromium ions and deposits on a pre-carbonized surface oris grafted inside the loofah sponge, so porosity is improved; and finally, spray drying is performed to improve surface concave-convex performance, so attractive performance is further improved.

Description

technical field [0001] The invention relates to a preparation method of a sound-absorbing material, which belongs to the field of materials. Background technique [0002] Sound-absorbing material is a material with strong sound energy absorption and noise reduction performance. It absorbs incident sound energy by virtue of its own porosity, thin film effect or resonance effect. It is one of the components of ultrasonic inspection equipment. The acoustic material should match the acoustic characteristic impedance of the surrounding sound transmission medium, so that the sound energy can enter the sound-absorbing material without reflection, and most of the incident sound energy can be absorbed. [0003] In order to meet the engineering and practical requirements of the cutting operation system, it is the key to solve the practical problem of high noise in the ultra-light and small cold cutting operation system. The noise of the ultra-light and small cold cutting operation sy...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B38/02C04B30/02C04B111/52
CPCC04B30/02C04B38/02C04B38/0675C04B2111/52C04B18/248C04B16/06C04B24/42C04B22/10C04B24/08C04B22/12C04B22/085C04B40/0082
Inventor 赵顺全付平
Owner 赵顺全
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