Fast, facile and environmentally friendly approach for preparing high thermal conductivity graphene oxide based nanofluids by solution plasma exfoliation

A simple, low-cost, and environmentally friendly approach was proposed for preparing high thermal conductivity nanofluids containing graphene oxide (GO) by using the solution plasma exfoliation (SPE) technique from graphite electrode of recycled battery core. The average length and thickness of GO were determined to be and 1.5 mu m and 3.3 nm corresponding to 8-10 layers, respectively. The nanofluids containing 1 vol% GO exhibited a good stability and highest thermal conductivity of 0.786 W.m(-1).K-1 which is about 31% enhancement in the thermal conductivity compared to the water-based fluid. The interfacial thermal resistance (R-K) and the thermal conductivity interfacial layer (k(i)) between GO and base fluid were found to be 56 x 10(-8) m(2) K W-1 and 8.5 W m(-1) K-1, respectively. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

Nanofluids containing graphene oxide prepared by solution plasma exfoliation demonstrated high thermal conductivity, showing a 31% enhancement compared to water-based fluids. The interfacial thermal resistance and thermal conductivity interfacial layer between GO and base fluid were determined to be 56 x 10(-8) m(2) K W-1 and 8.5 W m(-1) K-1, respectively.