Li Chenchao, Lin Dongdong, Zhao Wenhui
School of Physical Science and Technology, Ningbo University, Ningbo 315211, China.
Nanomaterials (Basel). 2020 Apr 12;10(4):736. doi: 10.3390/nano10040736.
The understanding of water dewetting in nanoporous materials is of great importance in various fields of science and technology. Herein, we report molecular dynamics simulation results of dewetting of water droplet in hydrophobic nanocavities between graphene walls under the influence of electric field. At ambient temperature, the rate of dewetting induced by electric field is significantly large. Whereas, it is a very low rate of dewetting induced by high temperature (423 K) due to the strong interaction of the hydrogen-bonding networks of water droplets in nanocavities. In addition, the electric filed induced formation of a water column has been found in a vacuum chamber. When the electric field is turned off, the water column will transform into a water droplet. Importantly, the results demonstrate that the rate of electric field-induced dewetting increases with growth of the electric field. Overall, our results suggest that electric field may have a great potential application for nanomaterial dewetting.
理解纳米多孔材料中的水去湿现象在各种科学和技术领域都具有重要意义。在此，我们报告了在电场影响下，石墨烯壁之间疏水纳米腔内水滴去湿的分子动力学模拟结果。在环境温度下，电场诱导的去湿速率显著增大。然而，由于纳米腔内水滴氢键网络的强相互作用，高温（423 K）诱导的去湿速率非常低。此外，在真空室中发现电场诱导形成了水柱。当电场关闭时，水柱会转变为水滴。重要的是，结果表明电场诱导的去湿速率随电场强度的增加而增大。总体而言，我们的结果表明电场在纳米材料去湿方面可能具有巨大的潜在应用价值。
