The development of nanoporous membrane structure provides a potential opportunity for the advanced ultra-thin liquid film evaporation process,for which the ability of effectively and continuously maintaining the nano-...The development of nanoporous membrane structure provides a potential opportunity for the advanced ultra-thin liquid film evaporation process,for which the ability of effectively and continuously maintaining the nano-thin liquid film is crucial to realize its superior performance.In this work,we elucidated the nanopore-based ultra-thin water film evaporation characteristics with non-equilibrium molecular dynamics simulation.A self-pumping water transport through the nanopore was observed,which is attributed to the driving force induced by the evaporation meniscus of thin liquid film.The dry-out crisis will occur with the increasing membrane thickness.We demonstrated that the hydrophobic carbon nanotube(CNT)can be utilized as the coating inside the hydrophilic silicon nitride(Si_(3)N_(4))nanopore,which reduces the flow resistance and presents an excellent capability to replenish the evaporated water.Based on the above findings,the internal coating of CNT is an advisable strategy for nanopore-based ultra-thin liquid film evaporation,possessing a stable high evaporation flux as well as a good mechanical strength.展开更多
基金the National Natural Science Foundation of China(No.51676124).
文摘The development of nanoporous membrane structure provides a potential opportunity for the advanced ultra-thin liquid film evaporation process,for which the ability of effectively and continuously maintaining the nano-thin liquid film is crucial to realize its superior performance.In this work,we elucidated the nanopore-based ultra-thin water film evaporation characteristics with non-equilibrium molecular dynamics simulation.A self-pumping water transport through the nanopore was observed,which is attributed to the driving force induced by the evaporation meniscus of thin liquid film.The dry-out crisis will occur with the increasing membrane thickness.We demonstrated that the hydrophobic carbon nanotube(CNT)can be utilized as the coating inside the hydrophilic silicon nitride(Si_(3)N_(4))nanopore,which reduces the flow resistance and presents an excellent capability to replenish the evaporated water.Based on the above findings,the internal coating of CNT is an advisable strategy for nanopore-based ultra-thin liquid film evaporation,possessing a stable high evaporation flux as well as a good mechanical strength.
