Massive enhancement in the thermal conductivity of polymer composites by trapping graphene at the interface of a polymer blend

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• 作者：Jinrui Huang^a ; ^{huangjinruiahu@126.com" class="auth_mail" title="E-mail the corresponding author} ; Yutian Zhu^b ; ^{ytzhu@ciac.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Lina Xu^a ; Jianwen Chen^b ; Wei Jiang^b ; Xiaoan Nie^a ; ^c ; ^{niexiaoan@126.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Polymer-matrix composites (PMCs) ; Thermal conductivity ; Interface ; Electrical properties
• 刊名：Composites Science and Technology
• 出版年：2016
• 出版时间：6 June 2016
• 年：2016
• 卷：129
• 期：Complete
• 页码：160-165
• 全文大小：1704 K

文摘

Trapping graphene at the interface of a poly(ε-caprolactone) (PCL)/poly(lactic acid) (PLA) blend is achieved through the adsorption-desorption of polymer chains on the graphene surface. The resulting composite exhibits remarkably high thermal conductivity due to the graphene sheets being controlled at the interface of the polymer blend. At 0.53 vol%, when a good co-continuous structure is formed, the thermal conductivity of the graphene composite is nearly 4 times higher than that of the pure PCL/PLA blend with co-continuous structure. Moreover, the blend achieves an extremely low thermal percolation threshold (0.11 vol%), the lowest to date, because most of the graphene sheets are selectively located at the interface of the blend with co-continuous structure.