受猪笼草启发的多孔微腔低冰黏附防除冰表面  

Low Ice Adhesion Deicing/Anti-icing Surface of Porous Microcavity Inspired by Nepenthes

作　　者：向科峰[1] 尹欢 宋岳干[1] 杨益[1] 李国强 赖林 XIANG Ke-feng;YIN Huan;SONG Yue-gan;YANG Yi;LI Guo-qiang;LAI Lin(School of Manufacturing Science and Engineering,Southwest University of Science and Technology,Sichuan Mianyang 621010,China)

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621010

出　　处：《表面技术》2023年第10期313-320,共8页Surface Technology

基　　金：结冰与防除冰重点实验室开放基金(IADL20210408)。

摘　　要：目的 提高光滑液体注入表面(SLIPS)的防/除冰耐用性。方法 将镍箔完全浸没在无水乙醇中,使用飞秒激光照射无水乙醇环境中的镍箔表面诱导出立体多孔纳米微腔阵列结构,并使用氟硅烷改性增加表面对硅油的亲和力,最后用50 cSt的硅油旋涂在改性后的表面上。通过扫描电镜和光学显微镜对立体多孔纳米微腔结构进行形貌分析,并通过延缓结冰试验、冰黏附强度测试和高温蒸发试验,分别评价该SLIPS的延缓结冰性能、冰黏附强度和防除冰耐用性。结果 在立体多孔纳米微腔结构的毛细作用下,具有亲油憎水性的立体多孔纳米微腔表面上的蒸馏水滴也会被钉扎。相比非结构化表面,该SLIPS将延缓结冰时间提升了2.8倍,同时,在低温高湿度环境中,实现了冷凝水的自去除。在80℃高温环境下的蒸发10 min后进行结冰/除冰操作,10个周期后,该SLIPS的接触角(θ_(CA))为110°,滑动角(θ_(SA))为8.5°,以及冰黏附强度参数(τ_(ice))为3.6 kPa。结论 利用飞秒激光加工无水乙醇环境中的镍箔表面生成的立体纳米多孔微腔阵列结构能够减少SLIPS表面的润滑剂损失,可有效提高防除冰SLIPS的耐用性。Ice accretion on solid surfaces is a common phenomenon in winter,which brings a lot of inconvenience to daily life and even causes serious disasters.At first,the superhydrophobic surface is considered as an ideal anti-icing surface for its micro/nano-textured structure and low surface tension.Air cushion formed between droplets and the surface leads to the decrease of contact area which contributes to delayed icing.In a high humidity environment,however,the droplets can easily intrude into the micro-nano structures,resulting in interlock.The ice is more difficult to remove.Fortunately,slippery liquid-infused surface(SLIPS) with lubricating fluids to fill micro-nanostructures inspired by nepenthes can be applied in anti-icing for its low friction force.With lubricating fluid with a high freezing point as the medium,the ice can be easily removed even in an ultra-low temperature and high humidity environment.However,lubricant losses are inevitable during the icing/deicing cycles,resulting in a great durability reduction and a significant drop of the anti-deicing performance.Therefore,how to reduce the loss of lubricating fluid and improve the durability of SLIPS has become a major challenge.To improve the anti-icing/deicing durability of slippery liquid-infused surfaces(SLIPS),the stereo porous nano-microcavity array was presented under the inspiration of the slippery liquid-infused surface of nepenthes.The stereo porous nano-microcavity array was fabricated by a femtosecond laser to irradiate the nickel foil surface immersed absolutely in ethanol.Then,C_(16)F_(17)H_(19)O_(3Si) was used to modify the surface to increase the affinity of the surface to silicone oil.Finally,50 c St silicone oil was used to spin-coat on the modified surface,obtaining the stereo porous nano-microcavity SLIPS.The morphologies of the stereo porous nano-microcavity structure were analyzed by scanning electron microscope(SEM) and optical microscope(OM).The anti-icing/deicing performance,ice adhesion and durability of the SLIPS were evaluated

关 键 词：仿生 飞秒激光直写 纳米微腔结构 SLIPS 低冰黏附 防冰 除冰 

分 类 号：TG174[金属学及工艺—金属表面处理]