Jiang N, Chen J Y, Parikh D V
School of Human Ecology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
Bioresour Technol. 2009 Dec;100(24):6533-6. doi: 10.1016/j.biortech.2008.10.062. Epub 2009 Aug 6.
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 Kjaer 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.
一种活性炭纤维无纺布（ACF）由棉质无纺布制成。对于ACF的声学应用，开发了一种以棉质无纺布为基层的ACF无纺布复合材料。还制备了棉质无纺布基层与一层玻璃纤维无纺布的复合材料，以及棉质无纺布基层与一层棉纤维无纺布的复合材料。使用Brüel和Kjaer阻抗管仪器测量了它们的吸声系数和声传输损失。使用邓肯分组法测试了复合材料之间差异的统计学显著性。研究得出结论，ACF复合材料比玻璃纤维或棉纤维复合材料表现出更强的吸收垂直入射声波的能力。声传输损失分析表明，这三种复合材料仍遵循传输损失的质量定律。具有棉纤维无纺布表层的复合材料具有更高的织物密度，因此比玻璃纤维和ACF复合材料具有更好的隔音性能。
