▎ 摘　　要

This work aims to investigate the thermal performance of acidic functionalized graphene (AFG) dispersed polyethylene glycol nano-phase change material (NPCM) in a simulated electronic cooling system. The chemical and morphological characterizations of the NPCM were carried out by FTIR and SEM techniques. The DSC analysis showed that the NPCM had melting temperatures in the range 50-54 degrees C and latent heat capacity between 158 and 200 kJ/kg. An enhancement of 24% in the latent heat capacity was observed for 0.2 vol.% loading compared to pure polyethylene glycol (PEG), and the tendency starts to decrease with further increase in the nanoparticle concentration. The thermal conductivity of the PCM was improved by dispersing AFG nanoparticles in it and a maximum of 72% (+/- 2%) enhancement was observed for 0.3 vol.% NPCM compared to pure PEG at 30 oC. Active cooling of the electronic system was conducted using NPCM at various graphene loadings coupled with a CPU fan. Average decrease of 13% (+/- 1%) and 35% (+/- 1%) in core temperature was observed by using 0.2 vol.% NPCM compared to pure PEG cooling and conventional air cooling system respectively. AFG dispersed PEGNPCM was observed as a suitable alternative for solid-liquid phase change materials and common liquid coolants in thermal management applications.