▎ 摘　　要

In this study, compact melamine urea formaldehyde (MUF) microcapsules containing paraffin phase change materials (PCMs) were prepared via in situ polymerization. The graphene sheets coated onto the shell of microcapsules, defined as "MUF@Graphene composites". The thermal conductivity of the microcapsules was enhanced without influencing their enthalpy by coating graphene sheets. The graphene sheets were visible in SEM images of MUF@Graphene composites. The thermal conductivity was 0.1944 W/mk for MUF microcapsules, and was 1.0540 W/mk for MUF@Graphene composites (10 wt%). The encapsulation ratio of all samples exceeded 80% and all samples exhibited favorable thermal stability. The IR emissivity of MUF microcapsules was 0.95, and was 0.64 for MUF@Graphene composites (10 wt%).