Fire-Resistant and Hierarchically Structured Elastic Ceramic Nanofibrous Aerogels for Efficient Low-Frequency Noise Reduction
Fire-Resistant and Hierarchically Structured Elastic Ceramic Nanofibrous Aerogels for Efficient Low-Frequency Noise Reduction
复制标题
用于高效低频降噪的耐火分层结构弹性陶瓷纳米纤维气凝胶
DOI：
10.1021/acs.nanolett.1c04532
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发表时间：
2022-02-23
期刊：
影响因子：
10.8
通讯作者：
Ding, Bin
中科院分区：
文献类型：
--
作者：
Cao, Leitao;Shan, Haoru;Ding, Bin
交通噪声被认为是最令人讨厌的污染之一，它对人体的生理和心理健康都有严重的危害。常用的纤维吸声材料受密度大、低频吸声能力差、耐火能力差等限制。在这里，我们开发了分层结构的弹性陶瓷静电纺纳米纤维气凝胶，具有轻质性能（密度为13.29 mg cm(-3)）和优异的低频吸声能力（NRC值为0.59）。具体而言，所获得的陶瓷静电纺纳米纤维气凝胶在火灾中不易燃，可以压缩并迅速恢复到原始高度而没有任何可见的损伤。此外，所得到的气凝胶可以方便有效地大规模制造成设计的形状，显示了它们的工业化潜力。这种陶瓷基块状材料的成功设计可能为下一代高效吸声产品的进一步开发提供新的见解。
Traffic noise has been regarded as one of the most annoying pollutions that induce severe hazards to human health, both physiological and psychological. The commonly used fibrous noise absorption materials are limited by their large density, poor sound absorption ability at low frequencies, and unsatisfactory fire-resistant ability. Here, we develop hierarchically structured elastic ceramic electrospun nanofibrous aerogels, which possess lightweight properties (density of 13.29 mg cm(-3)) and superior low-frequency sound absorption ability (NRC value of 0.59). Specifically, the obtained ceramic electrospun nanofibrous aerogel is nonflammable on exposure to fire and can be compressed and quickly recover to its original height without any visible damage. Moreover, the resultant aerogels could be facilely and efficiently manufactured into designed shapes on a large scale, demonstrating their potential for industrialization. The successful design of such ceramic-based bulk materials may provide new insights for the further development of the next-generation high-efficiency sound-absorbing products.