Ultralight nanofibre-assembled cellular aerogels with superelasticity and multifunctionality
Ultralight nanofibre-assembled cellular aerogels with superelasticity and multifunctionality
复制标题
具有超弹性和多功能性的超轻纳米纤维组装细胞气凝胶
DOI：
10.1038/ncomms6802
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发表时间：
2014-12-01
影响因子：
16.6
通讯作者：
Ding, Bin
中科院分区：
文献类型：
--
作者：
Si, Yang;Yu, Jianyong;Ding, Bin
三维纳米纤维气凝胶（NFA）是高度可压缩和弹性将具有广泛的技术意义的领域，从电气设备和生物工程阻尼材料;然而，创建这样的NFA已被证明是极具挑战性的。在这里，我们报告了一种新的策略，创建纤维，各向同性结合的弹性重建（纤维）NFA与分层细胞结构和超弹性相结合的静电纺丝纳米纤维和纤维冷冻成型技术。我们的方法导致本质上层状沉积的电纺纳米纤维组装成弹性块体气凝胶，具有可调的密度和理想的形状在大规模上。所得到的纤维NFA表现出>0.12 mg cm−3的密度、从变形中快速恢复、有效的能量吸收和在隔热、吸声、乳液分离和弹性响应导电的组合方面的多功能性。这种迷人的材料的成功合成可能会为各种应用的多功能NFA的设计和开发提供新的见解。
Three-dimensional nanofibrous aerogels (NFAs) that are both highly compressible and resilient would have broad technological implications for areas ranging from electrical devices and bioengineering to damping materials; however, creating such NFAs has proven extremely challenging. Here we report a novel strategy to create fibrous, isotropically bonded elastic reconstructed (FIBER) NFAs with a hierarchical cellular structure and superelasticity by combining electrospun nanofibres and the fibrous freeze-shaping technique. Our approach causes the intrinsically lamellar deposited electrospun nanofibres to assemble into elastic bulk aerogels with tunable densities and desirable shapes on a large scale. The resulting FIBER NFAs exhibit densities of >0.12 mg cm−3, rapid recovery from deformation, efficient energy absorption and multifunctionality in terms of the combination of thermal insulation, sound absorption, emulsion separation and elasticity-responsive electric conduction. The successful synthesis of such fascinating materials may provide new insights into the design and development of multifunctional NFAs for various applications.