多尺度柔性结构的防覆冰性能  

Icephobic Property on Multiscale Flexible Structures

作　　者：王磊[1] 侯永平[1] 郑咏梅[1] 

机构地区：[1]北京航空航天大学化学与环境学院,北京100191

出　　处：《高等学校化学学报》2015年第8期1548-1552,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21234001;21473007);国家教育部博士点专项基金(批准号:20121102110035)资助~~

摘　　要：通过软复型和晶体生长的方法制备了具有柔性微米锯齿和纳米棒结构的微纳米复合表面,其具有低温低黏附的特性,达到了优异的防覆冰效果.柔性微纳米结构表面的形变,可以在低温条件下有效去除液滴.研究结果表明,微米结构的弯曲作用改变了液滴在表面的三相线,凹面增大了气/液/固三相线长度,增加了驱动液滴的难度;凸面减小了气/液/固三相线长度,有利于减少液滴与表面之间黏附力,使液滴在重力作用下快速脱除.A kind of soft micro-ratchet / nano-rods structure surface was fabricated by intergrating the methods of soft-lithography and crystal growth,which realized low adhesion and icephobic properties in low temperature environment. The droplet could be driven off before it freezes by the deformation of micro-ratchet. The results indicate that the bend effect changes the three phase contact line and generates droplet-driven performance with different bend angles. The dent effect increases the three phase contact line and increases the difficulty for driving droplet. While,the raised effect decreases the three phase contact line and decreases the adhesion force between liquid and solid,which makes the droplet off the surface easily with the effect of gravity. This special structure has real potential in icephobic field.

关 键 词：软复型 晶体生长 三相线 防覆冰 柔性结构 

分 类 号：O647[理学—物理化学]