Zhuo Yizhi, Wang Feng, Xiao Senbo, He Jianying, Zhang Zhiliang
NTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway.
ACS Omega. 2018 Aug 30;3(8):10139-10144. doi: 10.1021/acsomega.8b01148. eCollection 2018 Aug 31.
Icephobic coating and surfaces are essential for protecting infrastructures such as transmission lines, transportation vehicles, and many others from severe damages of excessive icing. The slippery liquid-infused porous surfaces (SLIPS) are attracting escalating attention because of their low-ice adhesion strength. Despite all of the encouraging laboratory scale results, the SLIPS are still far from being applicable in real environments owing to the key unsolved problem, namely anti-icing durability. Inspired by the functionality of the amphibians' skin, lubricant regenerability was introduced to conventional SLIPS and realized by a facile and scalable fabrication route. A series of polydimethylsiloxane (PDMS)-based skinlike SLIPS were designed and fabricated by using a one-step method, the solvent evaporation-induced phase separation technique. The obtained skinlike SLIPS were able to regenerate surface lubricant constantly by internal residual stress because of phase separation and survive more than 15 cycles of wiping/regenerating tests. Thanks to the regenerability of the surface lubricant, the new SLIPS demonstrated durable icephobicity, showing a long-term low-ice adhesion strength below 70 kPa, which was only 43% of 160 kPa that for the pristine PDMS (Sylgard 184), even after 15 icing/deicing cycles. This work paves a new and facile way for achieving icephobic durability of SLIPS.
憎冰涂层和表面对于保护诸如输电线路、运输车辆等基础设施免受过度结冰的严重破坏至关重要。注入滑液的多孔表面（SLIPS）因其低冰附着力而受到越来越多的关注。尽管在实验室规模上取得了所有令人鼓舞的结果，但由于关键的未解决问题，即防冰耐久性，SLIPS仍远未适用于实际环境。受两栖动物皮肤功能的启发，将润滑剂可再生性引入传统的SLIPS，并通过一种简便且可扩展的制造路线实现。通过一步法，即溶剂蒸发诱导相分离技术，设计并制备了一系列基于聚二甲基硅氧烷（PDMS）的类皮肤SLIPS。由于相分离，所获得的类皮肤SLIPS能够通过内部残余应力不断再生表面润滑剂，并在超过15个擦拭/再生测试循环中存活下来。得益于表面润滑剂的可再生性，新型SLIPS表现出持久的憎冰性，即使在15次结冰/除冰循环后，其长期低冰附着力仍低于70 kPa，仅为原始PDMS（Sylgard 184）的160 kPa的43%。这项工作为实现SLIPS的憎冰耐久性开辟了一条新的简便途径。
