Biomimetic Multiwalled Carbon Nanotube/Polydimethylsiloxane Nanocomposites with Temperature-Controlled, Hydrophobic, and Icephobic Properties

材料科学 纳米复合材料 润湿 碳纳米管 接触角 微观结构 聚二甲基硅氧烷 复合材料 霜冻(温度) 粘附 纳米技术
作者
Yongyang Sun,Yubo Wang,Xin Sui,Wenyan Liang,Liang He,Fangxin Wang,Bin Yang
出处
期刊:ACS applied nano materials [American Chemical Society]
卷期号:4 (10): 10852-10863 被引量:30
标识
DOI:10.1021/acsanm.1c02275
摘要

Retarding and preventing ice/frost formation have increasing importance in aerospace applications because of widespread energy and safety concerns. In this study, multiwalled carbon nanotube–polydimethylsiloxane (MWCNT/PDMS) nanocomposites were fabricated via mechanical stirring and three-roll grinding. By imitating the microstructures of lotus leaves, various biomimetic nanocomposites were prepared by etching micropillar arrays on MWCNT/PDMS nanocomposites. These biomimetic nanocomposites possess superior flexibility, electrical conductivity, hydrophobicity, and icephobicity. Effects of the micropillar height on the wettability, freezing process of water droplets, ice/frost formation, and ice adhesion strength were characterized; influences of temperature on the wettability and strength of ice adhesion and feasibility of electrothermal deicing were investigated. The surface wettability, freezing process of water droplets, ice/frost formation, and ice adhesion strength in the Cassie state are independent of the micropillar height. However, compared to flat surfaces, the adhesion strength of ice increases, and formation of ice/frost decreases because of the presence of surface micropillars. At the same micropillar height, an increase in temperature decreases the contact angle and ice adhesion strength. The results indicate that the surface microstructure designability and flexible temperature-controllability of biomimetic nanocomposites have great potential for use in aerospace (anti-/deicing) applications.
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