Preparation And Application Of Multifunctional Aluminum Foil By Femtosecond Laser Micro/nanofabrication Technologies

Femtosecond laser as a contactless material process method has drawn worldwide attention due to ultrashort pulse duration,ultrahigh power energy and small heat-affect zone interacted with material.This thesis fabricated a microhole array ultrathin aluminum foil with special micro and nano structure using femtosecond laser micro/nano process technology.And these aluminum foils has been successfully applied for separation of oil/water mixture and particles sorting.The thesis mainly includes the following several parts:(1)Due to the interaction between femtosecond laser and material is a complex problem involved many subject.The current theories can not predict the dynamic interaction in femtosecond laser processing.Here,we use experiment method to fabricate the microhole array ultrathin aluminum foil with good surface quality and consistency between holes by studying the mechanism of femtosecond laser ablation with aluminum foil.(2)By systemly researching the wettability of the microhole array ultrathin aluminum foil with different pore size and interval,we fabricated the aluminum foil with superhydrophobicity in air and superoleophobic underwater successfully.Using the special wettability of the aluminum foil,we applied the foil to the separation of the oil/water mixture.Since the drawback of the separation(little dose mixture once),we design two different instruments for separation and collection of oil/water mixture consecutively with large flux flow.(3)Since the controllability of the pore size and the interval between the holes,we fabricated the microhole array aluminum foil with special pore size.The microfluidic chip was miniature,highly integration,fast reaction and little dose consumption.Two different microfluidic chips were designed and fabricated to realize the size-based microparticles separation with a high separation efficiency by device-insertion method.