摘要
A durable organogel anti-icing material via swelling crosslinked poly(dimethylsiloxane) with liquid paraffin is reported. The surface of the organogel is covered by a thin released layer of paraffin due to the osmotic pressure, which acts as a lubricant and reduces the ice adhesion greatly. Results show that the ice adhesion on the surface of the organogel is as small as 1.7±1.2 k Pa(at-30°C) and the low ice adhesion remains even when the temperature is lowered to-70°C. The surface with lubricating liquid paraffin layer exhibits excellent durability, as it shows an ultralow ice adhesion after 35 cycles of icing/deicing and 100 days of exposure in ambient environment.
本论文报道了一种通过液体石蜡溶胀聚二甲基硅氧烷制备持久耐用的油凝胶除冰涂层的方法.由于油凝胶表面被一层渗透压驱动的石蜡缓释层覆盖,这层缓释层可作为润滑层,大大降低油凝胶表面的冰粘附强度.实验结果显示,油凝胶表面是一种具有超低冰粘附的防结冰材料,在-30°C测试温度条件下的冰粘附强度是1.7±1.2 k Pa,且温度降低到-70°C时,其冰粘附强度不高于10 k Pa.在连续100天的使用期间,经过35次的结冰/除冰循环操作,具有润滑层的油凝胶表面仍然保持了持久的低粘附特性.较低的冰粘附和较宽的低温适用窗口,以及持久的耐用性,使其在依靠重力或风力的低粘附被动除冰领域具有很大的潜力和实际应用价值.
基金
the support from the National Natural Science Foundation of China (51173196, 51436004 and 21421061)
the National Basic Research Program of China (2012CB933801 and 2013CB933004)
