▎ 摘　　要

A porous graphene (PG) was synthesized using calcium carbonate micro-spheres as a hard template, graphene oxide prepared by the Hummers' method as graphene precursor, hydrazine hydrate as a reduction agent and N,N-dimethylformamide as a dispersion agent The as-prepared PG was modified by chemical vapor deposition of polydimethylsiloxane (PDMS) to obtain a super hydrophobic porous material (PG-PDMS) with a water contact angle of 152.30, which was used as a porous host for palmitic acid. It was found that the pores of the PG-PDMS were completely filled with palmitic acid. The hydrophobic modification significantly increased the palmitic acid content from 62.3 to 80. 2%. The incorporation of palmitic acid did not change the crystal structure of the PG and PG-PDMS. The latent heats of melting and crystallization for the palmitic acid-filled PG-PDMS are 167. 8 and 170. 1 kJ.kg(1), respectively. This phase change material has great potential for energy saving applications and solar energy storage.