Multilayer composites from vapor-grown carbon nano-fibers
Multilayer composites from vapor-grown carbon nano-fibers
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DOI：
10.1016/j.compscitech.2005.11.004
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发表时间：
2006-07-01
影响因子：
9.1
通讯作者：
Kotov, Nicholas
中科院分区：
文献类型：
--
作者：
Shim, Bong Sup;Starkovich, John;Kotov, Nicholas
由单壁碳纳米管和多壁碳纳米管组成的层层组装（LBL）材料显示出良好的机械性能，这归因于无机填料在有机纳米管基体中的均匀分布。在本文中，我们扩展了LBL层状纳米复合材料的家庭，包括另一个重要的积木，即气相生长的碳纳米纤维（VGCF）。VGCF除了具有低成本、可大量生产和杂质含量相对较少的优点外，还具有方便的管状形态。采用LBL膜沉积法成功制备了高负载量（> 46%）的VGCF自支撑聚合物复合膜，并通过扫描电镜、紫外-可见光谱和热重分析进行了表征。结合可渗透多层的性质，这些层状复合材料可以特别用于具有命令释放功能的智能材料，这需要相当大的机械强度和导热性和/或导电性。此类应用可包括生物植入物、防腐蚀涂层和热/电界面材料。LBL技术的固有多功能性通过将碳纳米纤维与其他纳米级构建块（例如蛋白质、纳米颗粒、粘土片等）分层来提供独特的多功能材料的制备。(c)2005爱思唯尔有限公司保留所有权利。
Layer-by-layer assembled (LBL) materials from single-wall carbon nanotubes and multiwall carbon nanotubes revealed promising mechanical properties attributed to the uniform distribution of inorganic filler in the organic polyelectrolyte matrix. In this paper, we extend the family of LBL layered nanocomposites to include another important building block i.e. vapor-grown carbon nanofibers (VGCFs). Besides the advantages of low cost, mass production, and relatively small amount of impurities, VGCFs have convenient tubular morphology. Using the LBL film deposition method free-standing polymer composite films with high loadings (> 46%) of VGCFs were successfully prepared and examined by scanning electron microscopy, UV-visible spectroscopy and thermal gravimetric analysis. Combined with permeable nature of polyelectrolyte multilayers, these layered composites can be exceptionally useful for smart materials with release-on-command functionality, which requires considerable mechanical strength and thermal and/or electrical conductivity. Such applications may include biological implants, anticorrosion coatings, and thermal/electrical interface materials. Inherent versatility of LBL technology affords preparation of unique multifunctional materials by layering carbon nanofibers with other nanoscale building blocks, for instance, proteins, nanoparticles, clay sheets and others. (c) 2005 Elsevier Ltd. All rights reserved.