Fabrication of VGCF incorporated C/C composite with high thermal property

采用基于催化化学气相沉积(CCVD)的Endo工艺，成功地制备了多壁碳纳米管，并将其商业化。这些多壁碳纳米管在室温下具有极高的导热系数，高达1000-2000W/MK。本文采用管状填料制备塑料复合材料作为碳纳米管/碳复合材料的先驱体，通过控制先驱体结构得到C/C复合材料，C/C复合材料的性能很大程度上依赖于先驱体的结构。先驱体的制备、炭化和石墨化对C/C复合材料的形成有很大的困难，可以得到复合材料。C/C复合材料的导热系数受先驱体结构的影响很大，在室温下可以得到500W/MK以上的导热系数。碳纳米管不仅具有导热性能，而且还具有其他有价值的功能，具有广阔的应用前景。目前的工作表明，具有高导热性能和其他功能的碳纳米管C/C复合材料的可能性很大，而树脂基前驱体的结构控制是制备碳/碳复合材料的重要步骤之一。

Carbon nanotubes with multi walled structure have been successfully prepared and commercialized by Endo's process based on Catalytic Chemical Vapor Deposition (CCVD) Method. These multiwalled carbon nanotubes have an extremely high thermal conductivity as high as 1000-2000W/mK at room temperature. In the present work, plastic composite with the tubes filler has been prepared as a precursor of carbon nanotubes/carbon composite.By controlling the precursor structure, the C/C composite has been obtained and the properties of C/C composite are very much depending upon the structure of presursor's. There have been lot of difficulties for preparing the precursor and carbonization as well as graphitization for C/C composite formation, and we can get the composite materials.The thermal conductivity of the C/C composite is strongly affected by the structure of precursor, and we got the value more than 500W/mK thermal conductivity at room temperature. Not only thermal conductivity, but also other valuable functions have been clarified, which are also promising for future applications.Present work have reviled the possibility of C/C composites of carbon nanotubes with high thermal conductivity as well as other functional properties, and for preparation of the materials the structural control of resin-based precursors is one of the most important process.