Preparation of Stearic Acid/Graphene oxide Based Form-Stable Composite Phase Change Materials

Abstract

Composite phase change materials (PCM) of stearic acid/graphene oxide were prepared by thiol-alkyne click coupling reaction. Stearic acid was firstly modified with propargyl to introduce thiol-yne clickable sites. Different amounts of graphene oxide were added to thiol-alkyne clickable formulation. To evaluate phase change properties of PCMs differential scanning calorimeter (DSC) was used. Thermal stability and degradation profiles of PCMs were investigated. The structural characterization of stearic propargyl ester and PCMs was performed by ATR-FTIR spectroscopy. The addition of graphene oxide increased the maximum weigh loss temperature from 328 to 351 ˚C with respect to the base formulation. Moreover, the crosslinking of stearic acid prevented the leakage of PCMs. 

Keywords

• phase change materials,thiol-yne click,graphene oxide

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