Polydimethylsiloxane-modified super hydrophobic porous graphene filled with palmitic acid as a phase change energy storage material

LIANG Wei-dong; ZHANG Guo-dong; LIU Ye; CHEN Pin-song; ZHU Zhao-qi; LIU Xiao-yu

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Article Navigation > New Carbon Mater. > 2015 > 30(5): 466-470

LIANG Wei-dong, ZHANG Guo-dong, LIU Ye, CHEN Pin-song, ZHU Zhao-qi, LIU Xiao-yu. Polydimethylsiloxane-modified super hydrophobic porous graphene filled with palmitic acid as a phase change energy storage material. New Carbon Mater., 2015, 30(5): 466-470.

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Polydimethylsiloxane-modified super hydrophobic porous graphene filled with palmitic acid as a phase change energy storage material

School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Funds: National Natural Science Foundation of China(51262019,51263012).

Received Date: 2015-01-10
Accepted Date: 2015-11-10
Rev Recd Date: 2015-10-03
Publish Date: 2015-10-28

Abstract

Abstract

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 152.3°, 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·kg¹, respectively. This phase change material has great potential for energy saving applications and solar energy storage.
- Porous graphene,
- Phase change material,
- Latent heat,
- PDMS,
- Palmitic

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