State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai, 201620, China.
Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051, China.
Nat Commun. 2019 Mar 29;10(1):1458. doi: 10.1038/s41467-019-09444-y.
There is an increasing demand worldwide on advanced two-dimensional (2D) nanofibrous networks with applications ranging from environmental protection and electrical devices to bioengineering. Design of such nanoarchitectured materials has been considered a long-standing challenge. Herein, we report a direct electronetting technology for the fabrication of self-assembled 2D nanoarchitectured networks (nano-nets) from various materials. Tailoring of the precursor solution and of the microelectric field allows charged droplets, which are ejected from a Taylor cone, to levitate, deform and phase separate before they self-assemble a 2D nanofibre network architecture. The fabricated nano-nets show mechanical robustness and benefit from nanostructural properties such as enhanced surface wettability, high transparency, separation and improved air filtration properties. Calcination of the nano-nets results in the formation of carbon nano-nets with electric conductivity and titanium dioxide nano-nets with bioprotective properties.
全球对具有二维（2D）纳米纤维网络的先进材料的需求日益增长，其应用范围从环境保护和电气设备到生物工程。设计这种纳米结构材料一直是一个长期存在的挑战。在此，我们报告了一种直接电子纺丝技术，用于从各种材料制备自组装的二维纳米结构网络（纳米网）。通过对前驱体溶液和微电场的精心设计，从泰勒锥中喷出的带电液滴可以在自组装成 2D 纳米纤维网络结构之前先悬浮、变形和相分离。所制备的纳米网具有机械稳定性，并受益于纳米结构特性，如增强的表面润湿性、高透明度、分离和改善的空气过滤性能。纳米网的煅烧导致形成具有导电性的碳纳米网和具有生物保护性能的二氧化钛纳米网。
