The Influence of Interactions between Polyethylene Glycol and Graphene Oxide in Shape-Stabilized PCMs on their Phase Change Behaviors

Chong Yun Wang; Wei Wang; Guo Ling Li; Wei Li; Wen Huai Tian; Xing Guo Li

doi:10.4028/www.scientific.net/AMR.800.459

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 800The Influence of Interactions between Polyethylene...

The Influence of Interactions between Polyethylene Glycol and Graphene Oxide in Shape-Stabilized PCMs on their Phase Change Behaviors

Abstract:

Two types of shape-stabilized phase change materials (PCMs) based on polyethylene glycol (PEG) and graphene oxide (GO) were prepared by two different methods, including a simple blending process and esterification reaction. The interactions between PEG and GO for the blending product (PEG/GO PCMs) is physical and weak, while for the grafting product (PEG-g-GO) is chemical and strong. In the PEG-g-GO composites, almost all PEG segments were restricted due to the strong chemical interactions and therefore no endothermic peak was observed in the DSC curve. As the interactions between PEG and GO in the PEG/GO composites is weak and physical, the phase change enthalpy of the PEG/GO composites is as much as 163 J/g when the PEG content is 90 wt%. The result indicates that the shape-stabilized PCMs with weak physical interactions are more proper for thermal energy storage than that with strong chemical interactions.

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Periodical:

Advanced Materials Research (Volume 800)

Pages:

459-463

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.800.459

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Online since:

September 2013

Authors:

Chong Yun Wang, Wei Wang, Guo Ling Li, Wei Li, Wen Huai Tian, Xing Guo Li

Keywords:

Graphene Oxide, Interaction, Phase Change Materials (PCM), Polyethylene Glycol, Thermal Energy Storage

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