UV and thermally stable polystyrene-MWCNT superhydrophobic coatings

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• 作者：G. Prasad ; R. P. S. Chakradhar ; Parthasarathi Bera and A. Anand Prabu
• 刊名：Surface and Interface Analysis
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：49
• 期：2
• 页码：93-98
• 全文大小：577K
• ISSN：1096-9918

文摘

A facile method for ultraviolet (UV) and thermally stable polystyrene-multiwalled carbon nanotubes (PS-MWCNT) superhydrophobic coatings was demonstrated by a simple spray coating method. The superhydrophobicity was understood by an increase in micro/nano roughness with the addition of MWCNTs. Surface morphology of the coatings showed protrusion like structure. The wetting behavior of the coatings was studied as a function of temperature, and it is observed that the coatings were superhydrophobically stable up to 250 °C. A transformation of superhydrophobic to superhydrophilic state is achieved at 300 °C. The coatings remained superhydrophobically stable when it was subjected to UV-irradiation and water immersion of 50 h. Thermogravimetric analysis showed a small shift (10°) towards higher temperature region with an addition of MWCNTs, suggesting the presence of weak interactions between PS and MWCNT, which is also supported by Fourier transform infrared spectroscopy, Raman and X-ray photoelectron spectroscopy studies. Both hydrophilic and superhydrophobic coatings find potential applications in our daily life. Copyright