Acoustical evaluation of carbonized and activated cotton nonwovens.
Acoustical evaluation of carbonized and activated cotton nonwovens.
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DOI：
10.1016/j.biortech.2008.10.062
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发表时间：
2009-12
影响因子：
11.4
通讯作者：
N. Jiang;J. Chen;D. Parikh
中科院分区：
文献类型：
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作者：
N. Jiang;J. Chen;D. Parikh
由棉非织造织物制造活性碳纤维非织造物（ACF）。针对活性炭纤维的声学应用，开发了一种以棉非织造布为基层的活性炭纤维非织造复合材料。还制备了棉非织造物基层与玻璃纤维非织造物层的复合材料，以及棉非织造物基层与棉纤维非织造物层的复合材料。使用Brüel和Kjær阻抗管仪器测量了它们的吸声系数和传声损失。采用邓肯分组法检验复合材料之间差异的统计学显著性。研究得出的结论是，ACF复合材料表现出更大的能力，吸收垂直入射的声波比复合材料与玻璃纤维或棉纤维。对三种复合材料的透声损失分析表明，三种复合材料的透声损失仍服从质量定律。表面层为棉纤维非织造布的复合材料具有更高的织物密度，因此比玻璃纤维和ACF的复合材料具有更好的隔音效果。
An activated carbon fiber nonwoven (ACF) was manufactured from a cotton nonwoven fabric. For the ACF acoustic application, a nonwoven composite of ACF with cotton nonwoven as a base layer was developed. Also produced were the composites of the cotton nonwoven base layer with a layer of glassfiber nonwoven, and the cotton nonwoven base layer with a layer of cotton fiber nonwoven. Their noise absorption coefficients and sound transmission loss were measured using the Brüel and Kjær impedance tube instrument. Statistical significance of the differences between the composites was tested using the method of Duncan’s grouping. The study concluded that the ACF composite exhibited a greater ability to absorb normal incidence sound waves than the composites with either glassfiber or cotton fiber. The analysis of sound transmission loss revealed that the three composites still obeyed the mass law of transmission loss. The composite with the surface layer of cotton fiber nonwoven possessed a higher fabric density and therefore showed a better sound insulation than the composites with glassfiber and ACF.