Critical heat flux characteristics of nanofluids based on exfoliated graphite nanoplatelets (xGnPs)

► We produced nanofluids containing xGnPs and xGnPs oxide. ► We performed pool boiling experiments for different particle concentrations. ► The CHF increased with increasing xGnPs/xGnPs oxide concentrations in fluid. ► xGnPs oxide nanofluids with 0.005 vol% shows the largest CHF enhancement. ► There is no reduction in the contact angle with respect to the CHF enhancement.