Interlocked dual network and superelastic electrospun fibrous sponges for efficient low-frequency noise absorption
Interlocked dual network and superelastic electrospun fibrous sponges for efficient low-frequency noise absorption
复制标题
互锁双网络和超弹性电纺纤维海绵可有效吸收低频噪音
DOI：
10.1002/sstr.202000004
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发表时间：
2020
期刊：
影响因子：
15.9
通讯作者：
Bin Ding
中科院分区：
文献类型：
--
作者：
Dingding Zong;Leitao Cao;Yuyao Li;印霞;Yang Si;Jianyong Yu;Bin Ding
交通噪声是城市噪声污染的主要来源，严重威胁着人类的生理和心理健康。纤维吸声材料广泛应用于交通噪声污染治理，但由于纤维直径较大，内部结构单调，导致低频吸声性能较差或力学性能不理想。本文报道了一种仿生和稳健的策略来设计超强和超弹性纤维吸声海绵，其通过集成互锁微/纳米双纤维网络的一步成形技术和原位交联方法来实现。所获得的藤状互锁结构的纤维海绵可以承受其重量10000倍的拉力而不变形。此外，该材料还具有出色的抗压缩疲劳性和轻质特性（8.70 mg cm−3）。最重要的是，互锁的双网络诱导的稳定蓬松堆叠结构赋予纤维海绵增强的低频吸声性能（在1000 Hz下的吸声系数为0.93），上级商业和报道的吸声材料。此外，该材料还具有良好的疏水性和耐温性。这项工作为进一步开发高效吸声材料开辟了新的途径。
Traffic noise is a major source of urban noise pollution, with severe threats to the physiological and psychological health of humans. Fibrous sound absorption materials are extensively applied in the control of traffic noise pollution; however, the larger fiber diameters and monotonous internal structure of such materials result in poor low‐frequency sound‐absorbing properties or unsatisfied mechanical properties. Herein, a biomimetic and robust strategy to design ultrastrong and superelastic fibrous sound absorption sponges is reported, which is achieved by integrating a one‐step forming technique of interlocked micro/nano dual fiber networks and an in situ crosslinking approach. The obtained vine‐like interlocked structured fibrous sponges can withstand a tensile force 10 000 times their weight without deformation. Furthermore, the materials also show outstanding compression fatigue resistance and a lightweight feature (8.70 mg cm−3). Most importantly, the interlocked dual‐network‐induced stable fluffy‐stacked structure endows the fibrous sponges with an enhanced low‐frequency sound‐absorbing property (absorption coefficient of 0.93 at 1000 Hz), which is superior to those of commercial and reported sound absorption materials. In addition, the materials also possess good hydrophobicity and temperature resistance. This work opens new pathways for the further development of highly efficient sound‐absorbing materials.