Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Locked Bag 20000, Victoria 3220, Australia.
Nanoscale. 2018 Sep 13;10(35):16868-16872. doi: 10.1039/c8nr05167d.
Recently, thermally regulating textiles have attracted wide interest owing to their ability to realize personal cooling and provide thermal comfort. However, most of the thermally conductive textiles cannot afford higher temperatures (>200 °C), which restricts their further applications in aviation, fire extinguishing or military requiring high temperature heat spreaders. Here, we report a high temperature thermally conductive nanocomposite textile consisting of amino functional boron nitride (FBN) nanosheets and polyimide (PI) nanofibers. Notably, the textile is "green" electrospun from aqueous solution without any toxic organic solvents, which is facile, economical and environmently friendly. Moreover, both FBN and the precursor of PI are modified to be water soluble and exhibit good compatibility in the spinning solution even under high concentrations. The "green" method obtained FBN-PI textile shows high thermal conductivity (13.1 W m-1 K-1) at a high temperature (300 °C), filling in the gap of thermally conductive polymer nanocomposite fibers for high temperature thermal regulation. Furthermore, it also provides efficient cooling capability as a thermal spreader. The good performance is ascribed to the weaving of the aligned FBN filament in a thermally stable PI fiber, which constructs an effective thermally conductive network. In addition, the nanocomposite textile is light weight, soft and hydrophobic, which is promising for electronic packaging or space suits for special high temperature thermal management.
最近，由于能够实现个人降温并提供热舒适感，调温纺织品引起了广泛的关注。然而，大多数导热纺织品无法承受更高的温度（>200°C），这限制了它们在航空、灭火或军事等需要高温热扩散器的领域的进一步应用。在这里，我们报告了一种由氨基功能化氮化硼（FBN）纳米片和聚酰亚胺（PI）纳米纤维组成的高温导热纳米复合纺织品。值得注意的是，该纺织品是通过水相纺丝“绿色”制备的，无需任何有毒有机溶剂，具有简便、经济和环保的特点。此外，FBN 和 PI 的前体都经过改性以增加其水溶性，并在高浓度下仍能在纺丝溶液中表现出良好的相容性。通过“绿色”方法获得的 FBN-PI 纺织品在高温（300°C）下表现出高导热性（13.1 W m-1 K-1），填补了用于高温热调节的导热聚合物纳米复合材料纤维的空白。此外，它还作为热扩散器提供了高效的冷却能力。这种良好的性能归因于在热稳定的 PI 纤维中编织对齐的 FBN 长丝，从而构建了有效的导热网络。此外，纳米复合纺织品重量轻、柔软且疏水，有望用于电子封装或特殊高温热管理的太空服。
