Novel conductive epoxy composites composed of 2-D chemically reduced graphene and 1-D silver nanowire hybrid fillers
Novel conductive epoxy composites composed of 2-D chemically reduced graphene and 1-D silver nanowire hybrid fillers
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DOI：
10.1039/c2jm16910j
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发表时间：
2012-04
影响因子：
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通讯作者：
Van Hoang Luan;H. N. Tien;T. Cuong;Byung-Seon Kong;J. Chung;E. Kim;S. Hur
中科院分区：
文献类型：
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作者：
Van Hoang Luan;H. N. Tien;T. Cuong;Byung-Seon Kong;J. Chung;E. Kim;S. Hur
在这项研究中，1-D银纳米线（NW），2-D化学还原石墨烯（CRG），和混合CRG-Ag NW填料作为导电环氧树脂复合材料进行了研究。通过将2-D CRG与1-D Ag纳米线结合，Ag纳米线的逾渗极限从30wt%降低到10wt%，并且由于薄的2-D导电CRG降低了Ag纳米线之间的隧穿电阻，因此导电性显著增强。由于CRG与环氧树脂基体中的固化剂之间的化学交联效应以及纳米结构与聚合物链之间的物理交联效应，它们的热性能和机械性能也得到了改善。CRG/Ag-NW/环氧树脂复合材料的断裂强度比纯环氧树脂提高了50%。
In this study, 1-D Ag nanowires (NWs), 2-D chemically reduced graphene (CRG), and hybrid CRG–Ag NW fillers were investigated for use as conductive epoxy composites. By combining the 2-D CRG with 1-D Ag NWs, the percolation limit of the Ag NWs decreased from 30 wt% to 10 wt% and the electrical conductivity was dramatically enhanced because of the decreased tunneling resistance between the Ag NWs due to the thin 2-D conductive CRGs. Their thermal and mechanical properties were also improved due to the chemical crosslinking effects between CRGs and the hardener in the epoxy matrix as well as the physical crosslinking effects between nano-structures and polymer chains. The break strength of the CRG/Ag-NW/epoxy composite was 50% higher than that of the pure epoxy resin.