Bioinspired solar anti-icing/de-icing surfaces based on phase-change materials  

基于相变材料的仿生太阳能防冰/除冰材料

作　　者：Siyu Sheng Zhicheng Zhu Zhanhui Wang Tongtong Hao Zhiyuan He Jianjun Wang 盛思雨;朱志成;王占辉;郝彤彤;贺志远;王健君(Key Laboratory of Green Printing,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Future Technology,University of Chinese Academy of Sciences,Beijing 100049,China;Zhong Neng Power-Tech Development CO.,LTD.,Beijing 100037,China)

机构地区：[1]Key Laboratory of Green Printing,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]School of Future Technology,University of Chinese Academy of Sciences,Beijing 100049,China [3]Zhong Neng Power-Tech Development CO.,LTD.,Beijing 100037,China

出　　处：《Science China Materials》2022年第5期1369-1376,共8页中国科学（材料科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (21875261, 51925307 and 21733010);the National Key Research and Development Program of China (2020YFE0100300 and 2018YFA0208502);the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (ZDBS-LYSLH031);the Youth Innovation Promotion Association of the Chinese Academy of Sciences (2018044)。

摘　　要：Solar anti-icing/de-icing is an environmentally friendly way to convert light energy into heat with the purpose of melting/removing ice. However, the inherent intermittency of solar irradiation limits the application of solar-thermal energy-conversion technologies, when continuous de-icing is required. Herein, we investigate a solar phase-change material(SPCM) that consists of expanded graphite(EG)/paraffin/polydimethylsiloxane(PDMS), which can not only perform the solar-thermal conversion but also release/store thermal energy. Under sunlight, the SPCM effectively collects and converts the light energy into thermal energy for later antiicing/de-icing. To prepare for a no-light period, e.g., in the evening, the converted thermal energy can be stored in the SPCM using a phase transition. In this way, the energy can be released when needed to keep the temperature of a surface from freezing. The SPCM surface shows excellent anti-icing/de-icing properties such as a long droplet freeze-delay time(td> 2 h), even at an ultra-low temperature(-40℃), using only the light of one sun. This freeze-delay time is much longer than that for a surface without PCM. The tested SPCM surfaces show a high de-icing rate(2.21 kg m^(-2)h^(-1)) under real-life conditions. In addition, the SPCM shows a high de-icing rate and excellent durability. This study provides a promising route for the utilization of solar energy in anti-icing/de-icing applications.太阳能除冰是环境友好的新型除冰/防冰方法,然而太阳能辐射的间歇性导致光热效率降低,限制了其发展.本文以膨胀石墨为光热载体,通过真空浸渍法将相变剂与之复合,再利用聚二甲基硅氧烷(PDMS)热固定型得到光热相变复合材料,并探究了其光热转化性能与防冰/除冰能力.结果表明复合材料不仅能实现光热转化,同时由于相变剂的作用能够进行热能的存储与释放,且表现出优越的防冰/除冰性能.在-40℃,一个太阳光强的条件下,材料表面的液滴延缓结冰时间超过2 h,在不同环境温度下表面除冰速率最高可达2.21 kg m^(-2)h^(-1).此外,此光热相变复合材料还表现出极高的可重复利用性.该材料是一类很有应用前景的高效光热防冰/除冰材料.

关 键 词：BIOINSPIRED phase-change materials anti-icing/deicing solar energy MULTIFUNCTIONAL 

分 类 号：TB34[一般工业技术—材料科学与工程]