Preparation of sisal fiber porous material capable of improving high, medium and low frequency sound absorption performance

A technology of sisal fiber and porous material, which is applied in fiber raw material treatment, cellulose pulp post-treatment, pulp property modification, etc., can solve problems such as high cost, complicated process, and high specific weight, and achieve increased fiber surface area and sound absorption The effect of excellent performance

Inactive Publication Date: 2017-01-25
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zhong Xiangzhang et al. measured the sound absorption coefficient of some glass wool with or without veneer materials, but glass wool has loose material, brittle quality and poor waterproof performance, so it is difficult to put it into industrial production.
Patents CN2544926, CN1463838 and CN101221754 all disclose the preparation method of the aluminum fiber sound-absorbing panel structure, which has excellent sound-absorbing performance and mechanical strength, but its cost is high, the specific gravity is large, and the process is complicated
Patent CN203198313U discloses a polyester fiber sound-absorbing board with a microporous structure. There is a low-melting-point fiber layer between the sound-absorbing board body, and the multi-layer sound-absorbing board body and the low-melting-point fiber layer are bonded together after high-temperature hot-melt and rapid rolling. Although the sound absorption is excellent, there are also high energy consumption, Complicated preparation process and other deficiencies

Method used

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  • Preparation of sisal fiber porous material capable of improving high, medium and low frequency sound absorption performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Heat the sisal fiber material with a diameter of 100um and a length of 2mm in 20wt% sodium hydroxide solution and soak it at 70°C for 6h, then dry it in a drying oven at 50°C, and mix the treated sisal fiber with 15wt% polyurethane adhesive solution Put them into the reaction tank, use mechanical high-speed stirring to make the fiber solution into a suspension, then cast and mold, and finally ripen to obtain a sisal fiber sample with a thickness of 6mm. According to the national standard GB-T 18696.2-2002 "Measurement of Sound Absorption Coefficient and Acoustic Impedance in Acoustic Impedance Tube Part 2. Transfer Function Method", the obtained sisal fiber samples were measured through the acoustic impedance tube for normal sound absorption coefficient ( The following examples are also measured using this method).

Embodiment 2

[0023] Heat the sisal fiber material with a diameter of 150um and a length of 3mm in a mixed solution of 15wt% sodium hydroxide solution and 5wt% hydrogen peroxide to soak at 75°C for 7h, and then dry it in a drying oven at 60°C. The treated sisal fiber, 20 The %wt polyurethane adhesive solution was added into the reaction tank, and the fiber solution was suspended by mechanical high-speed stirring, and then poured into a mold, and finally matured to obtain a sisal fiber sample with a thickness of 8mm. According to the national standard GB-T 18696.2-2002 "Measurement of Sound Absorption Coefficient and Acoustic Impedance in Acoustic Impedance Tube Part 2. Transfer Function Method", the obtained sisal fiber samples were measured through the acoustic impedance tube for normal sound absorption coefficient ( The following examples are also measured using this method).

Embodiment 3

[0025] Heat the sisal fiber material with a diameter of 175um and a length of 4mm in a mixed solution of 10wt% sodium hydroxide solution and 10wt% hydrogen peroxide to soak at 80°C for 8h, and then dry it in a drying oven at 65°C. The treated sisal fiber, 25 The %wt polyurethane adhesive solution was added into the reaction tank, and the fiber solution was suspended by mechanical high-speed stirring, and then poured into a mold, and finally matured to obtain a sisal fiber sample with a thickness of 10mm. According to the national standard GB-T18696.2-2002 "Measurement of Sound Absorption Coefficient and Acoustic Impedance in Acoustic Impedance Tube Part 2. Transfer Function Method", the obtained sisal fiber samples were measured through the acoustic impedance tube for normal sound absorption coefficient (The following examples are also measured using this method).

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Abstract

The invention relates to a preparation method of a sisal fiber porous material for improving the sound absorption performance of medium and low frequency. Hundreds of micron-sized sub-fibers are bonded with polyurethane adhesive to obtain a fiber composite sound-absorbing material. The sound-absorbing material has the advantages of simple preparation method, environmental protection, low cost, wide sources, and excellent sound absorption performance of medium and low frequency.

Description

technical field [0001] The invention relates to a preparation method of a sisal fiber porous material which improves the middle and low frequency sound absorption performance. Background technique [0002] With the pollution of environmental noise, people's lives are severely persecuted, how to effectively reduce noise has become a hot topic of current research. As a very important material, fiber plays an important role in sound absorption and noise reduction. The sound absorption of general fiber means that when the sound wave enters the material, friction and vibration will occur between the air in the material and the hole wall, resulting in viscous resistance, and the sound energy will be weakened; secondly, due to the temperature gradient in the material, when heat conduction It will convert sound energy into heat energy; in addition, it will resonate at a certain sound frequency, which will also cause sound energy to attenuate. [0003] Fiber sound-absorbing materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J3/00D21C9/00
CPCD21J3/00D21C9/004
Inventor 王婷葛曷一黄振
Owner UNIV OF JINAN
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