Aqueous preparation of polyethylene glycol/sulfonated graphene phase change composite with enhanced thermal performance

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• 作者：Hairong Li ; Ming Jiang ; Qi Li ; Denian Li ; Zongyi Chen ; Waping Hu ; Jing Huang ; Xizhe Xu ; Lijie Dong ; Haian Xie ; Chuanxi Xiong
• 关键词：Phase change materials ; Polyethylene glycol ; Sulfonated graphene ; Thermal performance
• 刊名：Energy Conversion and Management
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：75
• 期：Complete
• 页码：482-487
• 全文大小：1938 K

文摘

A polyethylene glycol (PEG)/sulfonated graphene (SG) phase change composite with enhanced thermal performance was prepared by solution processing in aqueous medium. It is remarkable that the addition of only 4 wt. % of SG to PEG could lead to a four times higher increase in thermal conductivity and a slight decrease in the phase change enthalpy, which is attributed to the formation of efficient thermal conductive network within the PEG matrix relevant to the excellent thermal property and unique 2-dimensional morphology of graphene as well as strong interface affinity between PEG matrix and SG nanosheets. The aqueous preparation technique is expected to pioneer a new way to prepare environment friendly organic phase change materials, and the production of PEG/SG composites is potentially scalable due to the facile fabricating process.