A Bioinspired Ultratough Multifunctional Mica-Based Nanopaper with 3D Aramid Nanofiber Framework as an Electrical Insulating Material
A Bioinspired Ultratough Multifunctional Mica-Based Nanopaper with 3D Aramid Nanofiber Framework as an Electrical Insulating Material
复制标题
DOI：
10.1021/acsnano.9b07192
复制
发表时间：
2020-01-01
期刊：
影响因子：
17.1
通讯作者：
Wang, Jianfeng
中科院分区：
文献类型：
--
作者：
Zeng, Fanzhan;Chen, Xianhong;Wang, Jianfeng
现代电气设备向小型化、大功率方向快速发展，对电绝缘材料的机械可靠性、介电性能和耐热性提出了严格的要求。云母基材料的所有这些特性的同时集成仍然没有解决。在此，受天然珍珠层结构中的三维甲壳素纳米纤维骨架的启发，我们报道了一种包含三维芳纶纳米纤维骨架的大面积层状云母基纳米纸，它是通过溶胶-凝胶-薄膜转化过程制备的。三维芳纶纳米纤维骨架和定向云母纳米片的偶联使纳米纸具有良好的机械强度，特别是突出的延展性(接近80%)和韧性(高达109MJ m(-3))，分别是所有其他珍珠层仿制品的4-240和6-220倍。同时，其优异的力学性能与高的绝缘强度(164kVmin(-1))、良好的耐热性(T-g=268℃)、良好的耐溶剂性和不可燃性相结合，远远优于传统的云母基材料。此外，我们还成功地以纳米带的形式展示了它的连续生产。令人难以置信的多性能组合和连续生产能力使云母基纳米纸成为小型化大功率电气设备中非常有前途的电气绝缘材料。
The rapid development of modern electrical equipment toward miniaturization and high power puts forward stringent requirements to the mechanical reliability, dielectric property, and heat resistance of electrical insulating materials. Simultaneous integration of all these properties for mica-based materials remains unresolved. Herein, inspired by the three-dimensional (3D) chitin nanofiber framework within the layered architecture of natural nacre, we report a large-area layered mica-based nanopaper containing a 3D aramid nanofiber framework, which is prepared by a sol-gel-film transformation process. The coupling of 3D aramid nanofiber framework and oriented mica nanoplatelets imparts the nanopaper with good mechanical strength, particularly outstanding ductility (close to 80%) and toughness (up to 109 MJ m(-3)), which are 4-240 and 6-220 times higher than those of all other nacre-mimetics. Meanwhile, the excellent mechanical properties are integrated with high dielectric strength (164 kV min(-1)), excellent heat resistance (T-g = 268 degrees C), good solvent resistance, and nonflammability, much better than conventional mica-based materials. Additionally, we successfully demonstrate its continuous production in the form of nanotape. The fabulous multiproperty combination and continuous production capability render the mica-based nanopaper a very promising electrical insulating material in miniaturized high-power electrical equipment.