摘要
为降低C/C复合材料制造成本,采用表面活性剂对煤沥青进行改性.实验结果表明,加入少量表面活性剂后,煤沥青的软化点、黏度等流变性能得到较大幅度的改善,而残炭率变化不大,同时QI含量降低、颗粒变小、渗透率增大.以改性后的煤沥青为浸渍剂对C/C复合材料进行增密处理,经六次浸渍-炭化后,C/C复合材料的密度可达到1.61g/cm3以上.
To decrease the cost of C/C composites, the surfactants are used to improve the impregnation performance of coal tar pitch. The results show that the addition of surfactants contributes significantly to modify the theological property, penetrability and QI content of coal tar pitch but has little effect on decreasing the carbon yield. Therefore, both the impregnating efficiency and properties of C/C composites can be well improved. The density of C/C composites can reach 1.61 g/cm^3 after six tirnes impregnation-carbonation.
出处
《煤炭转化》
CAS
CSCD
北大核心
2006年第2期59-62,共4页
Coal Conversion
基金
国家航空技术支撑项目(41801060501)
关键词
煤沥青
表面活性剂
黏度
软化点
残发率
浸渍-炭化
coal tar pitch, surfactant, viscosity, softening point, carbon yield,impregnation-carbonation
