Multi-energy driven form-stable phase change materials based on SEBS and reduced graphene oxide aerogel.

In this work, a series of novel multi-energy driven composite phase change materials (PCMs) were fabricated with paraffin wax (PW) as PCM, poly(styrene-b-ethylene-co-butylene-b-styrene) (SEBS) as the thickening agent, and reduced graphene oxide aerogel (rGOA) as multi-energy capture agent and support material. When the mass fraction of SEBS is in the range of 5 wt%-15 wt%, the composite PCMs can be formed as form-stable PCMs (FSPCMs) by the physical reaction. The enthalpy value of PW/SEBS 5 /rGOA is measured as high as 226 J/g. The prepared FSPCMs show a good thermal reliability due to little reduction of enthalpy value after 200 accelerate cycles. And the prepared FSPCMs present a good thermal stability according to the thermogravimetric analysis. The thermal conductivity results show that rGOA slightly improves the thermal conductivity of the FSPCMs. Moreover, the prepared FSPCMs show excellent photo-thermal and electro-thermal conversion performance with the help of rGOA which can harvest the photons and electrons. As a result, the PW/SEBS/rGOA PCMs have great promise in areas such as solar/electrical energy collection, thermal energy storage, and thermal management. [Display omitted] • PW/SEBS/rGO aerogel keeps the shape stability at about 95 wt% PW. • The maximum melting enthalpy of Composite PCM is measured as 226.3J/g. • The enthalpy of Composite PCM only reduced by 3% after 200 thermal cycles. • Composite PCM can be driven by multi-energy to complete phase change process. [ABSTRACT FROM AUTHOR]