Mao Xue, Hong Jie, Wu Yue-Xia, Zhang Qing, Liu Jia, Zhao Li, Li Hai-Hong, Wang Yao-Yu, Zhang Kun
Xi'an Polytechnic University, Xi'an 710048, P. R. China.
School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, P. R. China.
Nano Lett. 2021 Nov 24;21(22):9419-9425. doi: 10.1021/acs.nanolett.1c02657. Epub 2021 Nov 3.
Herein, we present a facile reinforcement method for the large-scale fabrication of highly flexible, mechanically stable, temperature-resistant ceramic lightweight membranes based on the cross-linked assembly of zirconia-silica (ZrO-SiO) nanofibrous and montmorillonite (MMT) nanosheets through electrospinning and a subsequent calcination process. The resulting MMT@ZrO-SiO membranes exhibit high flexibility with a bending rigidity of 0.2 cN mm, robust mechanical performance with a tensile strength of up to 1.83 MPa, robust fire resistance, and temperature-invariant mechanical stability from -196 to 1000 °C. The thermal superinsulation with a thermal conductivity as low as 0.026 W m K and the improved mechanical strength can be attributed to the cross-linked interfacial interaction between the ZrO-SiO nanofibers and the MMT nanosheets. Additionally, a firefighter uniform with MMT@ZrO-SiO membranes inside features a superior thermal protective property up to the A2 level (combined flame and radiant exposure) and an excellent fire resistance of up to 1000 °C, which is ideal for next-generation firefighter uniform manufacturing.
在此，我们展示了一种简便的增强方法，用于大规模制备高度柔性、机械稳定、耐高温的陶瓷轻质膜，该膜基于氧化锆 - 二氧化硅（ZrO - SiO）纳米纤维和蒙脱石（MMT）纳米片通过静电纺丝及后续煅烧过程的交联组装。所得的MMT@ZrO - SiO膜具有高柔韧性，弯曲刚度为0.2 cN·mm，机械性能强劲，拉伸强度高达1.83 MPa，耐火性强，在-196至1000°C范围内机械稳定性不受温度影响。其热导率低至0.026 W·m⁻¹·K⁻¹的热超绝缘性能以及机械强度的提高可归因于ZrO - SiO纳米纤维与MMT纳米片之间的交联界面相互作用。此外，内部含有MMT@ZrO - SiO膜的消防员制服具有高达A2级（火焰和热辐射综合暴露）的卓越热防护性能以及高达1000°C的出色耐火性，这对于下一代消防员制服制造而言是理想之选。
