Abstract: Phase change material for energy conversion can effectively solve the problem of mismatch between time and space in energy supply and demand, which is a matter of great concern.Firstly, lauric acid-palmitic acid (LA-PA) eutectic mixture was prepared by melt blending method. And then, reduced graphene oxide @lauric acid-palmitic acid (RGO@LA-PA) composite phase change material was prepared by ultrasonic dispersion method.The structure and thermal performance of prepared RGO@LA-PA composite phase change material were characterized by FT-IR, Raman, SEM, DSC, thermal cycling test and morphology stability test. The results showed that the RGO and LA-PA eutectic mixture were combined in a physical way. The thermal conductivity and latent heats of RGO@LA-PA composite phase change material were improved 20% to 0.426 W·m-1·K-1 and 159.9 J·g-1 by adding 1wt% RGO, respectively. In thermal cycling test, the latent heats of RGO@LA-PA reduced 2% after 100 times thermal cycle, which indicated that the RGO could improve the thermal conductivity of the phase change material and eliminate the leakage phenomenon and the RGO@LA-PA had a good thermal reliability.
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2018, Vol. 32 
