摘要
Pressure-driven reverse osmosis membrane has important application in seawater desalination.Inspired by the structure of aquaporin,we established and studied the mechanism of the structure of multilayer graphene with tapered channels as reverse osmosis.The water flux of multilayer graphene with tapered channels was about 20%higher than that of parallel graphene channel.The flow resistance model was established,and the relationship between flow resistance and opening angles was clarified.The relationship between flow resistance and outlet size was also described.By means of molecular dynamics simulation,slip coefficients of multilayer graphene with tapered channel were obtained and verified by the contact angle of water.Results show that the permeability of graphene with tapered channel is about three orders of magnitude higher than that of commercial reverse osmosis membrane and the desalination rate is 100%.Temperature difference between the two sides of the tapered channel will promote the water flux positively.
作者
王天振
CHEN Bo
SHAO Xingyu
ZHENG Huai
胡雪蛟
江海峰
WANG Tianzhen;CHEN Bo;SHAO Xingyu;ZHENG Huai;HU Xuejiao;JIANG Haifeng(Key Laboratory of Hydraulic Machinery Transients(Wuhan University),Ministry of Education,School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China;Research Institute of Tsinghua University in Shenzhen,Shenzhen 518071,China)
基金
the National Natural Science Foundation of China(No.51706157)
Applied Basic Research Foundation of Guangdong Hong Kong-Macao Greater Bay Area(No.2020B1515120011)。
