Enhanced conductivity behavior of polydimethylsiloxane (PDMS) hybrid composites containing exfoliated graphite nanoplatelets and carbon nanotubes
Enhanced conductivity behavior of polydimethylsiloxane (PDMS) hybrid composites containing exfoliated graphite nanoplatelets and carbon nanotubes
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DOI：
10.1016/j.compositesb.2013.10.039
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发表时间：
2014-03-01
影响因子：
13.1
通讯作者：
Busfield, J. J. C.
中科院分区：
文献类型：
--
作者：
Kong, K. T. S.;Mariatti, M.;Busfield, J. J. C.
制备了由剥离石墨纳米片（xGNP）和羟基官能化多壁碳纳米管（MWCNTs-OH）组成的聚二甲基硅氧烷（PDMS）杂化复合材料，研究了xGNP/MWCNTs-OH比对聚二甲基硅氧烷（PDMS）杂化复合材料热、电和力学性能的影响。在总填料含量固定为4wt%的情况下，由75%x GNP/25% MWCNT-OH组成的混杂复合材料显示出最高的热导率（0.392 W/m K）和电导率（1.24 x 10（-3）S/m），这显著超过了各自的单一填料复合材料中的任一种所显示的值。当两种填料组合使用时发现的增加的导热性和导电性归因于形成互连混合网络的填料之间的协同效应。相比之下，填料的各种不同组合仅显示出对PDMS复合材料的机械行为、热稳定性和热膨胀的适度影响。(C)2013爱思唯尔有限公司保留所有权利。
Polydimethylsiloxane (PDMS) hybrid composites consisting of exfoliated graphite nanoplatelets (xGnPs) and multiwalled carbon nanotubes functionalized with hydroxyl groups (MWCNTs-OH) were fabricated, and the effects of the xGnP/MWCNT-OH ratio on the thermal, electrical, and mechanical properties of polydimethylsiloxane (PDMS) hybrid composites were investigated. With the total filler content fixed at 4 wt%, a hybrid composite consisting of 75% x GnP/25% MWCNT-OH showed the highest thermal conductivity (0.392 W/m K) and electrical conductivity (1.24 x 10(-3) S/m), which significantly exceeded the values shown by either of the respective single filler composites. The increased thermal and electrical conductivity found when both fillers are used in combination is attributed to the synergistic effect between the fillers that forms an interconnected hybrid network. In contrast, the various different combinations of the fillers only showed a modest effect on the mechanical behavior, thermal stability, and thermal expansion of the PDMS composite. (C) 2013 Elsevier Ltd. All rights reserved.