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In relation to this article, we declare that there is no conflict of interest.
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Received February 15, 2017
Accepted May 1, 2017
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Surface modification of silica-graphene nanohybrid as a novel stabilizer for oil-water emulsion

Faculty of Chemical Engineering, Amirkabir University of Technology, Hafez Ave, P. O. Box 15875-4413, Tehran, Iran 1Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), P. O. Box 14665-1998, Tehran, Iran
banana@aut.ac.ir
Korean Journal of Chemical Engineering, September 2017, 34(9), 2488-2497(10), 10.1007/s11814-017-0125-y
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Abstract

The surface modification of silica-graphene nanohybrid through treatment with a mixture of nitric and sulfuric acid vapors to prepare a novel stabilizer for decalin-water emulsion was investigated. The nanohybrid was prepared through chemical vapor deposition using silica aerogel and acetylene as catalyst and carbon precursor at atmospheric pressure and 600 °C. The physicochemical properties of the modified nanohybrid were characterized by FT-IR, XPS, Raman spectroscopy, and TEM. The surface modification of nanohybrid was at various duration times (24, 48, and 72 hours) to optimize the surface modification conditions. Zeta potential of -39.9 mV revealed that the surface modification of nanohybrid after 72 hours had an excellent stability in aqueous phase due to the presence of exceptional functional groups. The emulsion average droplet size decreased by increasing the nanohybrid concentration. The negative value of the zeta potential showed the proposed nanohybrid can be applied as an appropriate stabilizer for emulsion.

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