摘要
借助超声波和新型分散剂羟乙基纤维素的预分散,实现了短碳纤维在水泥基体中的均匀分散,在扫描电镜下观察了硬化试件的断口形貌,讨论了碳纤维掺量、长度、水灰比对碳纤维增强水泥基复合材料(CFRC)导电性的影响。结果发现,CFRC的电阻率随碳纤维掺量的增加呈下降趋势,随水灰比的增加先降低后逐渐上升;采用振动压制成型时,电阻率比振动成型时大幅度下降。
With the aids of ultrasonic wave and a new dispersant hydroxyethyl cellulose（HEC）, carbon fibers were uniformly distributed in a cement matrix and homogenized carbon fiber reinforced cement composite （CFRC） was prepared. The fracture surface of the harderled samples was observed by scanning electron microscopy（SEM）. The influence of the lengths and contents of carbon fibers as well as the water/cement weight ratio on the conductivity of the composite was investigated. Results show that the electrical resistivity tended to decrease with the increasing of carbon fiber contents. It increased first and decreased then with the increase of water/cement ratio. By the vibrating and pressing method,the resistivity reduced far greatly than that by the vibrating method.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第10期1641-1644,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50172039)
陕西铁路工程职业技术学院科研基金资助项目(2005-ZK01)
关键词
碳纤维
分散性
水泥基
SEM
电阻率
carbon fibers
dispersion
cement-based
scanning electron microscopy
resistivity
