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Covalent Functionalization of Graphene for the Enhancement of Thermophysical Properties in Nanofluids
Author(s) -
Selvaraj Vishnuprasad,
Senthilkumar Karthick,
Krishnan Haribabu
Publication year - 2021
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202000477
Subject(s) - surface modification , nanofluid , graphene , thermal conductivity , materials science , dispersion stability , chemical engineering , autoclave , dispersion (optics) , microwave , nanoparticle , zeta potential , covalent bond , nanotechnology , composite material , chemistry , organic chemistry , physics , optics , quantum mechanics , engineering , metallurgy
Covalent functionalization of graphene nanoparticles by autoclave, reflux‐condensation, and microwave‐assisted methods was performed. Nanofluids prepared by acidic functionalized graphene exhibit a higher dispersion stability than raw graphene. The thermal conductivity of nanofluids obtained by the microwave‐assisted method was higher than with other functionalization methods, and a signifcant maximum thermal conductivity enhancement compared to deionized water was achieved. Microwave‐assisted thermochemical synthesis is a highly effective energy‐saving method over other conventional approaches.