Synergic enhancement of thermal properties of polymer composites by graphene foam and carbon black
Synergic enhancement of thermal properties of polymer composites by graphene foam and carbon black
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DOI：
10.1016/j.compositesb.2015.08.074
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发表时间：
2016
影响因子：
13.1
通讯作者：
Yunhong Zhao;Ya‐Fei Zhang;Zhengyu Wu;S. Bai
中科院分区：
文献类型：
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作者：
Yunhong Zhao;Ya‐Fei Zhang;Zhengyu Wu;S. Bai
设计并制备了一系列由石墨烯泡沫（GF）、炭黑（CB）和聚二甲基硅氧烷（PDMS）组成的新型聚合物复合材料。研究了它们的显微组织和热性能。CB不仅在互连GF的空间中，而且在GF臂的内部实现了良好的分散。当炭黑含量达到8wt%时，复合材料中的热传递路径由GF和CB组成双网络。CB/GF共填充复合材料的优异性能充分证明了GF和CB对复合材料热性能的协同效应。与纯PDMS和GF/PDMS复合材料相比，8wt% CB/GF/PDMS复合材料具有更好的性能，即热导率分别高出222%和72%，储能模量分别高出40%和10%，并且重量损失低得多。此外，热导率在100 °C下的长期稳定性证明了新型复合材料的适用性。这些结果表明CB/GF/PDMS复合材料作为热界面材料（TIM）具有良好的应用前景。
A series of novel polymer composites consisting of graphene foam (GF), carbon black (CB) and polydimethylsiloxane (PDMS) were designed and fabricated. Their microstructures and thermal properties were studied. An excellent dispersion of CB was achieved not only in the space of interconnected GF, but also in the interior of GF arms. Bi-network of thermal transfer path in the composites was made up by GF and CB when CB content reached 8 wt%. The synergic effect of GF and CB on thermal properties was well proved by the good performance of CB and GF co-filled composite. The 8 wt% CB/GF/PDMS composite has much better properties, namely, 222% and 72% higher in thermal conductivity, 40% and 10% higher in storage modulus and much lower weight loss compared to pure PDMS and GF/PDMS composite, respectively. Besides, the long term stability at 100 °C of thermal conductivity proves the applicability of the novel composite. These results signify a promising application as thermal interface materials (TIMs) of the CB/GF/PDMS composite.