In this study, we present a fast and easy, template-free chemical vapour deposition approach to synthesize a highly graphitic network consisting of entangled carbon nanotubes (CNTs) as a core and a pyrolytic graphite (PyG) coating as a shell around the CNTs forming a cohering sponge. The network height and density is tailorable by variation in the process parameters. Here, the height ranges between few micrometers and several millimeters, whereas the density ranges varies from 18 to 47 mg/cm³. In addition, we describe the evolution of the aerogel morphology by increasing synthesis time and conclude that the growth is determined by a simultaneous catalytic growth of CNTs and a pyrolytic deposition of graphite on the CNTs. First studies of electrical and thermal properties of the network and its epoxy composite revealed maximum conductivities of 1.7 ± 0.1 S/m and 0.58 ± 0.13 W/mK, respectively.

在这项研究中，我们提出了一种快速，简便，无模板的化学气相沉积方法来合成高度石墨化的网络，该网络由缠结的碳纳米管（CNT）作为核心和热解石墨（PyG）涂层作为围绕CNT形成的壳一块连绵的海绵。网络高度和密度可通过工艺参数的变化进行调整。在这里，高度范围在几微米到几毫米之间，而密度范围在18到47 mg /cm³之间。此外，我们通过增加合成时间来描述气凝胶形态的演变，并得出该增长是由碳纳米管的同时催化生长和碳纳米管上石墨的热解沉积决定的。对网络及其环氧复合材料的电学和热学性质的初步研究表明，其最大电导率为1。