Fabrication Of Wear-Resistant Superhydrophobic Material And Investigation Of Durability

Superhydrophobic materials have broad application prospects due to unique self-cleaning property,such as anti-fouling of fabrics,anti-corrosion of metal,and anti-freezing in low temperature environments.At present,inspired by the special wettability in nature,a series of bionic artifical superhydrophobic materials have been fabricated.However,the practical applications of superhydrophobic materials are easily destroye by external forces and lose superhydrophobicity due to its poor mechanical property and fragile micro/nano structure.Therefore,it's significant to improve the mechanical strength and prepare wear-resistance and durability superhydrophobic materials for its extensive application in various fields.This paper intends to use metal oxides,polytetrafluoroethylene(PTFE)and fiber fabrics as raw materials,to prepare superhydrophobic materials with excellent hydrophobicity,good wear-resistance,stable mechanical properties through a simple,low-cost method,so as to provide a degree of theoretical basis for the practical application of superhydrophobic materials.The main contents of this paper are as follows:(1)The colourful suoerhydrophobic materials were successfully prepared by incorporating different kinds of metal oxides and the low surface energy modifacation of stearic acid.The as-prepared materials possess excellent superhydrophobicity and the water contact angles greater than 150°.The diversity and controllability of the superhydrophobic materials was achieved by adjusting the proportion of different metal oxides and the content of acrylic colour.The test of sandpaper abrasion showed that the mechanical strength of the superhydrophobic material can be improved by changing the proportion of metal oxides.Moreover,the as-prepared material can be used for separation of oil/water mixture with good separation efficiency.(2)Choosing PTFE as precursor,the prepared acidic silica sol was deposited on the surface of PTFE,and then the material was low surface energy modification with dimethyldiethoxysilane(DEDMS),the mechanically stable superhydrophobic material was obtained.The test of water impacting,sandpaper abrasion and tape adhesion showed good mechanical stability of the superhydrophobic materials.The measurement of self-cleaning property showed excellent self-cleaning ability of the superhydrophobic materials.In addition,the superhydrophobic materials can be recycled and easily reused to prepare the new superhydrophobic materials.(3)Choosing fabric as raw materials,the silica nanoparticles functionalized with methyltriethoxy silane(MTES)and their in situ incorporation onto fabric.Then the fabric was superhydrophobization with aluminate coupling agent(ACA),a superhydrophobic-superoleophilic fabric was obtained.The as-prepared fabric showed liquid repellency not only to water but also to coffee,milk and tea droplets,which are normal in daily life.Importantly,the as-prepared materials can be used for separation of oil/water mixture with good separation efficiency.(4)The superhydrophobic fabric with antibacterial property was successfully prepared by the Ag nanoparticles in situ deposition and low surface energy modification of aluminate coupling agent(ACA).The measurement of mechanical washing and ultrasonic test showed that the superhydrophobic fabric had good mechanical durability and stability.