The Oil/water Separation And Fog Collection Based On Aluminum Foil With Micropore Arrays Drilling By Femtosecond Laser

It is new way to develop new technology in social life for researching and studying the surface structures,functional characteristics and survival skills of some creatures,which would inspire people on engineering application.The researchers is puzzled by the problem that how to prepare the Micro-Nano structures with specific functions.In paper,we combined the Femtosecond laser micro-nano processing technology and bionic wetting principle,and designed the new functions devices based on multilevel Micro-nano structures and functions,which refers to the environment in the actual projects.This paper mainly studies the following aspects:1)the elements of Femtosecond laser processing system and the relationship between Micro-nano structures and the laser-field distribution parameters.2)The design that Oil/water separation devices and fog collections devices based on aluminum foil with micro-pores arrays drilled by laser.The ability experiments of oil/water separation and fog collections membrane was also conducted.The details were as following:(1)The elements of Femtosecond laser process system were analyzed on the basis of the different materials.After this,the dependencies between Micro-nano structures and the laser-field distribution parameters were studied systematicly with the pulse energy distributions of laser.Furthermore,the controllable fabrications of micro-pores was produced.The current development status in oil/water separation and fog collection was also studied.(2)For the problem of oil/water separation nowadays,we presented oil/water separation based on superhydrophilic and superhydrophobic membranes with micropores arrays.The micropores arrays with diameters of from 10 to 40 were controllable fabricated by adjusting laser parameters.The wetting of different materials was investigated.We also studied the efficiency and speed of oil/water separation with superhydrophilic and superhydrophobic membranes.In addition,the multi-wetting membane(Janus membrane)was designed and used to continuous oil recovery efficiently.(3)For the problem of fog collection with the development of bionic functions,we presented a new way to collect fog using a multi-wetting membrane with conical pores arrays.It was designed three wetting in this membrane after the fog collection process investigated.Furthermore,the self-driven transport mechanism of water of the membrane was studied with wettability gradient force and Laplace pressure.The ability and efficiency of Janus membrane were researched compared with superhydrophilic and superhydrophobic membranes,and showed a excellent performance.In addition,collection model was also designed and produced to quantitatively verified collection effect.We presented a new way to design the oil/water separation membrane and fog collection membrane with micro-pores arrays drilling by laser on aluminium foil.Those multi-wetting membranes showed a unique experiment affect in actual system devices,which may be provide a new way to construct functional devices in the industrial application.