Effects of carbonaceous conductive fillers on electrical and thermal properties of asphalt-matrix conductive composites  

碳质传导颗粒对沥青基传导复合物的电、热性质影响(英文)

作　　者：周晓锋[1,2] 张小松[1] 周建成[3] 

机构地区：[1]东南大学能源与环境学院,南京210096 [2]盐城工学院基础部,盐城22400 [3]东南大学化学化工学院,南京210096

出　　处：《Journal of Southeast University(English Edition)》2013年第1期88-91,共4页东南大学学报（英文版）

基　　金：The National Natural Science Foundation of China(No.50906073,31070517);China Postdoctoral Science Foundation(No.20110491332);Jiangsu Planned Projects for Postdoctoral Research Funds(No.1101009B);the Science and Technology Development Plan of North Jiangsu(No.BC2012444)

摘　　要：The relationship between thermal/electrical conductivity enhancement in asphalt-matrix mixtures and the properties of filling conductive particles is studied. The thermal properties with filling the carbon fiber, graphite conductive particles in asphalt-matrix mixtures are investigated. Based on the generalized effective medium theory （ EMT ）, the effective thermal and electrical conductivity of carbon fiber/asphalt and graphite/asphalt composites are theoretically elucidated. The theoretical results are found to be in reasonably well agreement with the experimental data. Moreover, the theoretical and experimental results show that the large-aspect-ratio shape of particles can help to achieve a large enhancement of effective conductivity, and the use of disk-like high conductivity particles can limit the additive contents for preserving the volumetric properties and mechanical properties of asphalt composites. The generalized effective medium theory model can be used for predicting the thermal and electrical properties of asphaltmatrix composites, which is still available for most of the thermal/electrical modifications in two-phase composites.研究了传导沥青基混合物的电、热传输性质的增强与添加的传导颗粒热导率、电导率的关系.分析了碳纤维、石墨传导颗粒对沥青基质的热导率改性效果.根据改进的有效媒质理论,研究了碳纤维/沥青、石墨/沥青混合物的有效热导率和电导率.理论计算与实验数据吻合.此外,理论及实验计算结果显示:使用颗粒纵横比大的传导颗粒可以获得更大的传导增强;使用盘状的高传导颗粒可以限制添加量,进而保证沥青基质的体性质和机械性质.改进的有效媒质理论模型不仅可以使用于预测沥青基复合介质的电、热性质,而且适用于所有两相复合体系.

关 键 词：carbonaceous conductive fillers asphalt-matrix composites thermal conductivity electrical conductivity 

分 类 号：O472.2[理学—半导体物理]