Covalent Functionalization of Graphene for the Enhancement of Thermophysical Properties in Nanofluids

摘要

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 microwaveassisted 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.