Preparation and properties of polyvinyl alcohol-carbon black/hollow sphere foam sound absorption composites

被引：0
|
作者：
Zhou X. [1 ]
Zhang L. [1 ]
Wang L. [1 ]
Gao Y. [1 ]
机构：
[1] School of Materials Science and Engineering, Shanghai University, Shanghai
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 07期
基金：
中国国家自然科学基金;
关键词：
carbon black; hollow sphere foam; noise reduction coefficient; polyvinyl alcohols; sound absorption performance;
D O I：
10.13801/j.cnki.fhclxb.20221102.002
中图分类号：
学科分类号：
摘要：
Noise pollution greatly affects human mental and physical health. Porous sound absorption materials usually perform well in middle and high frequency bands, but improvement still needs in low frequency bands. In this work, hollow sphere foam matrix were prepared with fly-ash hollow sphere and sodium silicate as the raw materials firstly. Subsequently, flexible polyvinyl alcohol-carbon black (PVA-C) composite was introduced into the porous matrix through vacuum impregnation and ordinary heat drying or freeze drying process to obtain PVA-C/ hollow sphere foam composites. The results show that the compressive strength of the obtained porous composite is more than 1.65 MPa. The sound absorption performance is improved by 35.2% in the range of 100-1 000 Hz, compared with the hollow sphere foam matrix. The noise reduction coefficient reaches 0.523, which is increased by 10.1%. The results of the study provide a basis for the improvement of sound absorption performance and practical application of porous sound absorbing materials. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：3998 / 4007
页数：9
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