relation: https://khub.utp.edu.my/scholars/11989/
title: The influence of covalent and non-covalent functionalization of GNP based nanofluids on its thermophysical, rheological and suspension stability properties
creator: Hussein, O.A.
creator: Habib, K.
creator: Saidur, R.
creator: Muhsan, A.S.
creator: Shahabuddin, S.
creator: Alawi, O.A.
description: Covalent functionalization (CF-GNPs) and non-covalent functionalization (NCF-GNPs) approaches were applied to prepare graphene nanoplatelets (GNPs). The impact of using four surfactants (SDS, CTAB, Tween-80, and Triton X-100) was studied with four test times (15, 30, 60, and 90 min) and four weight concentrations. The stable thermal conductivity and viscosity were measured as a function of temperature. Fourier transform infrared spectroscopy (FTIR), thermo-gravimetric analysis (TGA), X-ray diffraction (XRD) and Raman spectroscopy verified the fundamental efficient and stable CF. Several techniques, such as dispersion of particle size, FESEM, FETEM, EDX, zeta potential, and UV-vis spectrophotometry, were employed to characterize both the dispersion stability and morphology of functionalized materials. At ultrasonic test time, the highest stability of nanofluids was achieved at 60 min. As a result, the thermal conductivity displayed by CF-GNPs was higher than NCF-GNPs and distilled water. In conclusion, the improvement in thermal conductivity and stability displayed by CF-GNPs was higher than those of NCF-GNPs, while the lowest viscosity was 8 higher than distilled water, and the best thermal conductivity improvement was recorded at 29.2. © 2019 The Royal Society of Chemistry.
publisher: Royal Society of Chemistry
date: 2019
type: Article
type: PeerReviewed
identifier:   Hussein, O.A. and Habib, K. and Saidur, R. and Muhsan, A.S. and Shahabuddin, S. and Alawi, O.A.  (2019) The influence of covalent and non-covalent functionalization of GNP based nanofluids on its thermophysical, rheological and suspension stability properties.  RSC Advances, 9 (66).  pp. 38576-38589.  ISSN 20462069     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075951086&doi=10.1039%2fc9ra07811h&partnerID=40&md5=6585a334a5e393a2f5d9e3d0f6da4db4
relation: 10.1039/c9ra07811h
identifier: 10.1039/c9ra07811h