Yeong Yong Han, Wang Chenyu, Wynne Kenneth J, Gupta Mool C
Charles. L. Brown Department of Electrical and Computer Engineering, University of Virginia , Charlottesville, Virginia 22904, United States.
Department of Chemical and Life Science Engineering, Virginia Commonwealth University , Richmond, Virginia 23284, United States.
ACS Appl Mater Interfaces. 2016 Nov 23;8(46):32050-32059. doi: 10.1021/acsami.6b11184. Epub 2016 Nov 11.
A new approach for anti-icing materials was created to combat the effects of ice accretion and adhesion. The concept combines the strengths of individual characteristics for low ice adhesion based on elasticity, superhydrophobicity, and slippery liquid infused porous surfaces (SLIPS) for an optimal combination of high water repellency and ice-phobicity. This was achieved by replicating microtextures from a laser-irradiated aluminum substrate to an oil-infused polydimethylsiloxane (PDMS) elastomer, the result of which is a flexible, superhydrophobic, and lubricated material. This design provides multiple strategies of icing protection through high water repellency to retard ice accretion and with elasticity and oil infusion for low ice adhesion in a single material. Studies showed that an infusion of silicone oils with viscosity at 100 cSt and below 8 wt % in PDMS solution is sufficient to reduce the ice shear strength to an average of 38 kPa while maintaining contact angles and roll-off angles of above 150° and below 10°, respectively. This ice-adhesion value is a ∼95% reduction from a bare aluminum surface and ∼30% reduction from a microtextured, superhydrophobic PDMS material without oil infusion. In addition, three-month aging studies showed that the wetting and ice-adhesion performance of this material did not significantly degrade.
一种用于抗冰材料的新方法被开发出来，以对抗结冰和冰粘附的影响。该概念结合了基于弹性、超疏水性和注入滑液的多孔表面（SLIPS）的低冰粘附个体特性的优势，以实现高拒水性和憎冰性的最佳组合。这是通过将激光辐照铝基板的微纹理复制到注入油的聚二甲基硅氧烷（PDMS）弹性体上来实现的，其结果是一种柔性、超疏水且润滑的材料。这种设计通过高拒水性延缓结冰，并在单一材料中利用弹性和注入油实现低冰粘附，从而提供了多种结冰防护策略。研究表明，在PDMS溶液中注入粘度为100厘沲及以下且含量低于8 wt%的硅油，足以将冰剪切强度降低至平均38 kPa，同时分别保持接触角和滚落角高于150°和低于10°。这个冰粘附值比裸露的铝表面降低了约95%，比未注入油的微纹理超疏水PDMS材料降低了约30%。此外，为期三个月的老化研究表明，这种材料的润湿性和冰粘附性能没有明显下降。
