Crosslinking polyurethane-based solid-solid phase change materials with in situ reduced graphene oxide (GO) sheets were fabricated by a facile solvothermal treatment. GO sheets could give their full play to the enhancement of the system, which can endow the system with outstanding form-stability over 100 °C for the synergistic effect with hexamethylene diisocyanate biuret, and remarkable light-thermal conversion efficiency up to 78.7% due to the simultaneous in situ reduction of GO. The phase change enthalpy increases to 127.3 J/g from 86.8 J/g with 3.8 wt% GO for the nucleation and alleviating effects in the system. Meanwhile, the system has improved thermal stability and favorable thermal reproducibility. Therefore, the synthesized materials with comprehensive properties would be perspective to be used in energy storage devices such as solar energy collector system.

通过简便的溶剂热处理，制备了具有原位还原氧化石墨烯（GO）片的交联聚氨酯基固-固相变材料。GO薄板可以充分发挥系统的功能，可以使系统在100°C以上的温度下具有出色的形状稳定性，从而与六亚甲基二异氰酸酯缩二脲具有协同作用，并且由于其热光转换效率高达78.7％， GO的同时原位还原。相变焓从86.8 J / g增加到127.3 J / g，GO的含量为3.8 wt％，用于成核和减轻系统中的作用。同时，该系统具有改善的热稳定性和良好的热再现性。所以，