Gonzales Joseph, Kurihara Daiki, Maeda Tetsuro, Yamazaki Masafumi, Saruhashi Takahito, Kimura Shigeo, Sakaue Hirotaka
Department of Aerospace and Mechanical Engineering, University of Notre Dame, White Field Research Laboratory, Notre Dame, IN 46556, USA.
Department of Mechanical Engineering Kanagawa Institute of Technology, Atsugi, Kanagawa 243-0292, Japan.
Materials (Basel). 2019 Aug 28;12(17):2758. doi: 10.3390/ma12172758.
Ice accretion is detrimental to numerous industries, including infrastructure, power generation, and aviation applications. Currently, some of the leading de-icing technologies utilize a heating source coupled with a superhydrophobic surface. This superhydrophobic surface reduces the power consumption by the heating element. Further power consumption reduction in these systems can be achieved through an increase in passive heat generation through absorption of solar radiation. In this work, a superhydrophobic surface with increased solar radiation absorption is proposed and characterized. An existing icephobic surface based on a polytetrafluoroethylene (PTFE) microstructure was modified through the addition of graphite microparticles. The proposed surface maintains hydrophobic performance nearly identical to the original superhydrophobic coating as demonstrated by contact and roll-off angles within 2.5% of the original. The proposed graphite coating also has an absorptivity coefficient under exposure to solar radiation 35% greater than typical PTFE-based coatings. The proposed coating was subsequently tested in an icing wind tunnel, and showed an 8.5% and 50% decrease in melting time for rime and glaze ice conditions, respectively.
结冰对包括基础设施、发电和航空应用在内的众多行业都有不利影响。目前，一些领先的除冰技术采用加热源与超疏水表面相结合的方式。这种超疏水表面可降低加热元件的功耗。通过吸收太阳辐射增加被动热量产生，可进一步降低这些系统的功耗。在这项工作中，提出并表征了一种具有增强太阳辐射吸收能力的超疏水表面。通过添加石墨微粒对基于聚四氟乙烯（PTFE）微结构的现有憎冰表面进行了改性。如接触角和滚落角所示，所提出的表面保持了与原始超疏水涂层几乎相同的疏水性能，与原始值的偏差在2.5%以内。所提出的石墨涂层在暴露于太阳辐射下时的吸收系数也比典型的基于PTFE的涂层高35%。随后在所提出的涂层在结冰风洞中进行了测试，在霜冰和 glaze 冰条件下，其融化时间分别减少了8.5%和50%。 （注：glaze ice 专业术语为“雨凇”，这里按原文未翻译）
