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    Superhydrophobic carbon nanotube/polydimethylsiloxane composite coatings

    Year: 2015

    Journal: MATERIALS SCIENCE AND TECHNOLOGY, Vol. 31, p 1745-1748, 20170208

    Authors: Zhang, H. -F.; Teo, M. K.; Yang, C.

    Organizations: Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230027, Peoples R China; Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore

    This paper reports a method for fabricating carbon nanotube (CNT)/polydimethylsiloxane (PDMS) composite superhydrophobic coatings. With toluene as a solvent, the coating is obtained directly by spray of CNT/PDMS/toluene suspension. The hydrophobicity and micro-/nanostructure of the coatings are studied with respect to the mass ratio (MR) of CNT to PDMS. Based on the multiscale morphology analysis, it is shown that the nanoscale roughness is essential for achieving superhydrophobicity. To form nanoscale rough surface and obtain a stable superhydrophobic coating, MR>0.3 is recommended. In addition, such coatings also show small slide angle, low adhesion strength and long term stability of the coated surface. The method reported in this study is low cost and especially suitable for engineering applications.