Hierarchically porous networks structure based on flexible SiO2 nanofibrous aerogel with excellent low frequency noise absorption
Hierarchically porous networks structure based on flexible SiO2 nanofibrous aerogel with excellent low frequency noise absorption
复制标题
基于柔性SiO2纳米纤维气凝胶的分级多孔网络结构，具有优异的低频噪声吸收能力
DOI：
10.1016/j.ceramint.2022.08.344
复制
发表时间：
2022
影响因子：
5.2
通讯作者：
Tianlong Liu
中科院分区：
文献类型：
--
作者：
Mengmeng Yang;Zhaofeng Chen;Lixia Yang;Yang Ding;Xiaoyang Chen;Manna Li;Qiong Wu;Tianlong Liu
环境噪声已被认为是主要的噪声污染，严重危害人类的身心健康。目前常用的商用纤维吸声材料在低频吸波性能和耐火性能方面存在不足，限制了其广泛应用。针对这些问题，提出了一种将柔性纳米纤维与rGO/MXene纳米片相结合的新方法，制备了具有分级多孔结构的rGO/MXene/SiO2纳米纤维复合气凝胶，该气凝胶具有极低的密度（9.8mg/cm 3）和优异的上级低频吸声性能（NRC值为0.51）.所得复合气凝胶具有高达80%的大变形（对应的压缩应力为17 kPa），并迅速恢复。此外，制备的气凝胶易于大规模生产，为新一代吸声产品的开发提供了参考。
Environmental noise has been regarded as major noise pollution with severe hazards to human physical and mental health. The common commercial fiber sound-absorption materials have insufficient low frequencies wave absorbing and fire-resistant ability, limiting their wide application. To solve these problems, a novel strategy combining flexible nanofibers and rGO/MXene nanosheets was proposed to fabricate rGO/MXene/SiO 2 nanofibers composite aerogel with hierarchically porous structure, which possessed an extremely low density of 9.8 mg/cm 3 and superior low-frequency sound absorption ability (NRC value of 0.51). The obtained composite aerogel possessed a large deformation up to 80% (corresponding compressive stress of 17 kPa) and quickly recovered. In addition, the as-prepared aerogel could be easily produced on a large scale, providing a reference for the development of new generation of sound-absorbing products.