Noncovalently functionalized pristine graphene/metal nanoparticle hybrid for conductive composites
Noncovalently functionalized pristine graphene/metal nanoparticle hybrid for conductive composites
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DOI：
10.1016/j.compscitech.2014.01.006
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发表时间：
2014-04-09
影响因子：
9.1
通讯作者：
Liu, Lan
中科院分区：
文献类型：
--
作者：
Liu, Konghua;Chen, Shilong;Liu, Lan
金属纳米结构和高质量的原始石墨烯的结合被寄予了极高的期望，在许多应用中。提出了一种通过无缺陷的原始石墨烯与聚酰胺胺(PAMAM)树枝状大分子的非共价官能化和金属纳米颗粒均匀附着在石墨烯表面的组合工艺来大规模制备金属纳米颗粒(NP)/原始石墨烯杂化及其导电聚合物复合材料的方法。在无溶剂条件下，得到了稳定的PAMAM功能化石墨烯纳米流体。杂化材料中的石墨烯片层保持了固有结构和均匀分散。以PAMAM为稳定剂和还原剂，通过热还原的方法实现了银纳米粒子(AgNP)修饰石墨烯的均匀分散杂化。由于优质原始石墨烯在较低的渗流阈值下具有良好的导电性，以及通过AgNPs的低温烧结增强了填料之间的接触，该杂化材料被用作纳米级填料，以制备用于电气互连的环氧基导电复合材料。这种方法可以实现石墨烯基复合材料的大规模生产，具有广泛的应用前景。(C)2014爱思唯尔有限公司。保留所有权利。
The combination of metal nanostructures and pristine graphene with high quality is highly expected for many applications. A method for the large-scale production of metal nanopartide (NP)/pristine graphene hybrid and its conductive polymer composites is presented, by a combinatorial process of noncovalent functionalization of defect-free pristine-graphene with Poly(amidoamine) (PAMAM) dendrimer and the homogenous attachment of metal NPs on graphene surface. Stable PAMAM functionalized graphene nanofluid is achieved when there is the absence of solvents. The graphene sheets in the hybrid preserve the intrinsic structure and homogenous dispersion. Silver NP (AgNP) decorated graphene hybrid with homogenous dispersion is realized by using PAMAM as stabilizing and also reducing agents through thermal reduction method. The hybrid is used as nanoscale filler to generate epoxy-based conductive composites for electrical interconnects due to the combined effects of the excellent electrical conductivity of high-quality pristine-graphene at low percolation threshold and enhanced contacts between the fillers by low temperature sintering of AgNPs. This method could lead to the large-scale production of graphene-based composites for a wide range of applications. (C) 2014 Elsevier Ltd. All rights reserved.