【摘 要】
：
Undesired icing directly threatens people's safety of wealth and life.[1] Thermal deicing,chemical deicing and mechanical deicing are conventional methods,w
【机 构】
：
School of Materials Science and Engineering,Tsinghua University,Beijing 100084,P.R.China
【出 处】
：
The 6th International Conference on Nanoscience and Technolo
论文部分内容阅读
Undesired icing directly threatens people's safety of wealth and life.[1] Thermal deicing,chemical deicing and mechanical deicing are conventional methods,which have defects such as high energy cost,low efficiency and terrain constraint.[1] In this article,an anti-icing coating with superhydrophobic surface and low ice adhesion stress is fabricated through a simple and low-cost technique.Sacrificial layer based on polydimethylsiloxane(PDMS)/TiO2 nanocomposites is sprayed or spinned on the silicon-oil-infused PDMS base material with low ice adhesion.[2] Surface of the TiO2 nanoparticles have been modified by the 1H,1H,2H,2H-Perfluoroalkyltriethoxysilane(FTE)to obtain low surface energy,which exhibit superhydrophobic property.Due to the large contact angle with 164±2.78°,water drops can easily slide away from the surface of PDMS/TiO2 nanocomposites before the occurrence of ice crystals,and thus lower the probability of ice accumulation on the surface.[3] Once ice forms on the superhydrophobic surface,the ice adhesion stress can be larger than the adhesion stress between sacrificial layer and base material,[4] which results in the automatical detachment of sacrificial PDMS/TiO2 film from the base material.After that,the silicon-oil-infused PDMS surface will be exposed to the subsequent ice and maintain low ice adhesion stress as~30kPa(an order of magnitude lower than alumium),[5] which makes ice easily fell off.Therefore,this anti-icing coating is effective during the whole freezing process.
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