Paraffin@graphene/silicon rubber form-stable phase change materials for thermal energy storage

Abstract

A kind of paraffin@graphene/silicone rubber (SR) composite form-stable phase change material (PCM) was prepared in this paper. Paraffin@graphene phase change microcapsules were fabricated by electrostatic self-assembly method, then the microcapsules were added to the SR matrix to prepare paraffin@graphene/SR composites. The microstructure of the composite was characterized by scanning electron microscopy (SEM). Differential scanning calorimetry (DSC) and thermal conductivity test results show that the phase change latent heat is 53.39 J g⁻¹ and the thermal conductivity reaches 0.453 W m⁻¹ K⁻¹ for the composite with 30 phr paraffin@graphene microcapsules. The microcapsules enhance the thermal and mechanical properties of SR, which can be used for thermal energy storage.

Keywords:

• Silicon rubber
• Paraffin@graphene microcapsules
• Form-stable phase change materials
• Thermal conductivity

Additional information

Funding

This work was financially supported by NSAF of China [No.U1730114] and the National Natural Science Foundation of China [No.51803199]; Scientific Research Fund of Sichuan Provincial Education Department [No.17TD0043] and Project of State Key Laboratory of Environmental-friendly Energy Materials [No.17kffk15 and No.18kfhg09].