The
negatively charged phase change latex (PCL) was obtained by
simultaneously emulsifying paraffin and ethylene propylene diene monomer
(EPDM) into water. Graphene (GE) was positively modified using cetyltrimethylammonium
bromide and was then introduced into the PCL. Because of electrostatic
attraction, the positively charged graphene was tightly bonded with
the negatively charged PCL particles. Paraffin/EPDM@graphene thermally
conductive and shape-stabilized phase change materials (TSPCMs) were
obtained by hot press vulcanization. The thermal conductivity of TSPCMs
was up to 1.451 W·m–1·K–1, with an increase of 294% compared to that without graphene. The
error between the actual enthalpy and the theoretical value of TSPCMs
was −1.00%, and the leakage rate was only 0.621% after being
heated for 48 h. Because of the combination of EPDM and GE, the prepared
TSPCM exhibits excellent comprehensive performance, so it has great
application potential in the field of thermal energy storage and thermal
management of electronic devices.
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