Effect of carbon nanotube deformation on electrical conductivity of nanocomposites
讲座名称：
Effect of carbon nanotube deformation on electrical conductivity of nanocomposites
讲座时间：
2012-12-26
讲座人：
朱正宏
形式：
校区：
兴庆校区
实践学分：
讲座内容：
应航天航空学院、机械结构强度与振动国家重点实验室的邀请，加拿大约克大学地球与空间科学工程系副主任朱正宏教授来我院进行学术访问，并作学术讲座：
题目：Effect of carbon nanotube deformation on electrical conductivity of nanocomposites
碳纳米管的变形对于复合材料的电导率的影响
时间：12月26日（星期三）下午3：00
地点：力学示范中心会议室（中心一楼2108）
内容摘要：We have studied the electrical conductivity in carbon nanotube polymer composites based on a three-dimensional resistor network model by incorporating the radial deformation effect of carbon nanotubes. A new model is developed to account for the variation of intrinsic resistance of carbon nanotubes and the contact resistance in the vicinity of carbon nanotube junctions due to the radial deformation of the nanotubes. The numerical results show that (i) both intrinsic resistance and contact resistance in the carbon nanotube percolating network are affected significantly by the radial deformation, (ii) the increasing rate of intrinsic resistance is much greater that the decreasing rate of contact resistance as the deformation increases, leading to a net increase of resistance at the nanotube junctions, and (iii) the total resistances of junctions vary by several orders in magnitude with angles between two deformed carbon nanotubes. It is found that the effect of the radial deformation of carbon nanotubes is not negligible and the new model agrees with the experimental data better than the existing models that assumed rigid carbon nanotubes.
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