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Volume 6
Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212
Advanced Materials 2018
September 04-06, 2018
September 04-06, 2018 | Zürich, Switzerland
21
st
International Conference on
Advanced Materials & Nanotechnology
Developing super hydrophobic copper/graphene nano-platelets coatings by plasma spraying
Tahmineh Forati
1
, F Ben Ettouil
1
, T Kaydanova
2
, N Moghimian
2
, C Moreau
1
, M Pugh1
and
A Dolatabadi
1
1
Concordia University, Canada
2
Nanoxplore Inc., Canada
W
ater vapor condensation is frequently used as an effective method of transferring heat using drop-wise condensation on
non-wetting surfaces demonstrating enhanced heat transfer when compared to film-wise condensation. The aim of this
study is to develop hierarchical surface morphologies on superhydrophobic coatings with high water repellency and mobility
using atmospheric plasma spraying (APS). The novelty of this work lies in the processing of the plasma sprayed copper/
graphene nano-platelets (GNPs) composite coatings. Retention of the GNPs was made successful by controlling the plasma
power and particle injection angle to minimize the temperature and consequently prevent the combustion of GNPs. Several
coatings were developed with different surface morphologies. By isolating the effect of surface chemistry using a stearic acid
treatment the significance and effect of the achieved morphologies on the wetting behavior of the coatings were investigated.
Experimental results demonstrated that coatings produced by the APS process showed excellent water repellency and water
mobility: water contact angles as high as 162° as well as water sliding angles less than 1° were achieved due to the hierarchical
roughness attributed to the submicron size particles in the feedstock. Moreover, results indicated that Cu/GNPs is a promising
surface coating to promote dropwise condensation of water in industrial conditions due to its robust chemical stability with the
potential for scalable applications while maintaining low thermal resistance.
Figure:
The SEM micrographs of the Cu-GNPs coating. Inset: a sessile drop of water on this surface
Recent Publications
1. Daniel J Preston, Daniela LMafra, NenadMiljkovic, Jing Kong and Evelyn NWang (2015) Scalable graphene coatings for
enhanced condensation heat transfer. Nano Lett. 15(5):2902-2909.
2. Gun-Tae Kim, Su-Ji Gim, Seung-Min Cho, Nikhil Koratkar and Il-Kwon Oh (2014) Wetting-transparent graphene films
for hydrophobic water-harvesting surfaces. Adv. Mater. 26(30):5166-5172.
3. Tong Y, Bohmb S and Song M (2013) Graphene-based materials and their composites as coatings. Austin J Nanomed
Nanotechnol. 1(1):1-16.
4. Singh Raman R K, Chakraborty Banerjee P, Lobo DE, Gullapalli H, Sumandasa M, Kumar A, et al. (2012) Protecting
copper from electrochemical degradation by graphene coating. Carbon N Y. 50(11):4040-40453.
5. David Ward, Ankur Gupta, Shashank Saraf, Cheng Zhang, Tamil Selvan Sakthivel, Swetha Barkam, Arvind Agarwal
and Sudipta Seal (2016) Functional NiAl-graphene oxide composite as a model coating for aerospace component repair.
Carbon 105:529-543.
Biography
Tahmineh Forati has completed her PhD in Biomaterials Engineering at Islamic Azad University, Sciences and Research Branch, Tehran, Iran in 2014. She has completed
her MSc in Biomaterials in 2009, followed by BSc in Material Science and Engineering at the same university. Currently, she is working as a Research Assistant at
Concordia University, Canada. Her international experience includes various programs, contributions and participation in different countries for diverse fields of study. Her
research interests reflect in her wide range of publications in various national and international journals.
Tahmineh.forati@gmail.comTahmineh Forati et al., Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C3-020