Super-Hydrophobic/Icephobic Coatings Based on Silica Nanoparticles Modified by Self-Assembled Monolayers

Liu, Junpeng; Janjua, Zaid A.; Roe, Martin; Xu, Fang; Turnbull, Barbara; Choi, Kwing-So; Hou, Xianghui

doi:10.3390/nano6120232

Open AccessFeature PaperArticle

Super-Hydrophobic/Icephobic Coatings Based on Silica Nanoparticles Modified by Self-Assembled Monolayers

by

Junpeng Liu

,

Zaid A. Janjua

,

Martin Roe

,

Fang Xu

,

Barbara Turnbull

,

Kwing-So Choi

and

Xianghui Hou

^*

Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK

^*

Author to whom correspondence should be addressed.

Nanomaterials 2016, 6(12), 232; https://doi.org/10.3390/nano6120232

Submission received: 1 October 2016 / Revised: 18 November 2016 / Accepted: 28 November 2016 / Published: 2 December 2016

(This article belongs to the Special Issue Nanocomposite Coatings)

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Abstract

A super-hydrophobic surface has been obtained from nanocomposite materials based on silica nanoparticles and self-assembled monolayers of 1H,1H,2H,2H-perfluorooctyltriethoxysilane (POTS) using spin coating and chemical vapor deposition methods. Scanning electron microscope images reveal the porous structure of the silica nanoparticles, which can trap small-scale air pockets. An average water contact angle of 163° and bouncing off of incoming water droplets suggest that a super-hydrophobic surface has been obtained based on the silica nanoparticles and POTS coating. The monitored water droplet icing test results show that icing is significantly delayed by silica-based nano-coatings compared with bare substrates and commercial icephobic products. Ice adhesion test results show that the ice adhesion strength is reduced remarkably by silica-based nano-coatings. The bouncing phenomenon of water droplets, the icing delay performance and the lower ice adhesion strength suggest that the super-hydrophobic coatings based on a combination of silica and POTS also show icephobicity. An erosion test rig based on pressurized pneumatic water impinging impact was used to evaluate the durability of the super-hydrophobic/icephobic coatings. The results show that durable coatings have been obtained, although improvement will be needed in future work aiming for applications in aerospace.

Keywords: super-hydrophobic; icephobic; silica nanoparticles; fluorosilane; self-assembled monolayers; durability

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MDPI and ACS Style

Liu, J.; Janjua, Z.A.; Roe, M.; Xu, F.; Turnbull, B.; Choi, K.-S.; Hou, X. Super-Hydrophobic/Icephobic Coatings Based on Silica Nanoparticles Modified by Self-Assembled Monolayers. Nanomaterials 2016, 6, 232. https://doi.org/10.3390/nano6120232

AMA Style

Liu J, Janjua ZA, Roe M, Xu F, Turnbull B, Choi K-S, Hou X. Super-Hydrophobic/Icephobic Coatings Based on Silica Nanoparticles Modified by Self-Assembled Monolayers. Nanomaterials. 2016; 6(12):232. https://doi.org/10.3390/nano6120232

Chicago/Turabian Style

Liu, Junpeng, Zaid A. Janjua, Martin Roe, Fang Xu, Barbara Turnbull, Kwing-So Choi, and Xianghui Hou. 2016. "Super-Hydrophobic/Icephobic Coatings Based on Silica Nanoparticles Modified by Self-Assembled Monolayers" Nanomaterials 6, no. 12: 232. https://doi.org/10.3390/nano6120232

APA Style

Liu, J., Janjua, Z. A., Roe, M., Xu, F., Turnbull, B., Choi, K.-S., & Hou, X. (2016). Super-Hydrophobic/Icephobic Coatings Based on Silica Nanoparticles Modified by Self-Assembled Monolayers. Nanomaterials, 6(12), 232. https://doi.org/10.3390/nano6120232

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Super-Hydrophobic/Icephobic Coatings Based on Silica Nanoparticles Modified by Self-Assembled Monolayers

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