气相生长碳纤维增强水泥基复合材料的制备及性能  

Preparation and properties of vapor grown carbon fibers reinforced cement-matrix composites

作　　者：郁军[1] 许并社[1] 

机构地区：[1]太原理工大学材料科学与工程学院,新材料界面科学与工程省部共建教育部重点实验室,太原030024

出　　处：《复合材料学报》2010年第2期62-65,共4页Acta Materiae Compositae Sinica

基　　金：国家“973”计划项目(2004CB217808);科技部国际合作项目(2007DFA50940)

摘　　要：研究了脱油沥青(De-oiled asphalt)基气相生长碳纤维(VGCFs)增强水泥基复合材料的制备方法及其性能。以脱油沥青作原料,采用化学气相沉积法(CVD)制备出气相生长碳纤维,以此纤维制备水泥基功能复合材料。结果表明:低含量VGCFs的碳纤维增强水泥基复合材料具有良好的抗压强度和导电性能,在VGCFs的掺量由0增至0.6%范围内,随着VGCFs掺量的增加,碳纤维增强水泥基复合材料的电阻率下降,抗压强度提高。当VGCFs为0.4%时,VGCFs水泥基复合材料电阻率降低2个数量级,从3.25×105Ω.cm降为1.49×103Ω.cm,抗压强度提高28.8%,为最佳掺量。A study on the preparation and performance of vapor grown carbon fibers（VGCFs） reinforced cement-matrix composites was carried out.VGCFs were prepared from de-oiled asphalt（DOA） by chemical vapor deposition（CVD） and then the cement-matrix composites were prepared with the VGCFs.The results show that the compressive strength and electrical conductivity of VGCFs reinforced cement-matrix composites with lower fiber content can be enhanced.The resistivity of cement-matrix composites decreases and compressive strength increases with weight fraction of VGCFs increasing from 0 to 0.6% in the paste.A fiber content of 0.4% by mass of cement is recommended,yielding a resistivity of 1.49×103 Ω·cm.This value is lower by two orders of magnitude the value of 3.25×105 Ω·cm for the same paste without VGCFs.And the compressive strength increases by 28.8% as the VGCFs content increases from 0 to 0.4% by mass of cement.

关 键 词：气相生长碳纤维 水泥基复合材料 强度 电阻率 化学气相沉积法 

分 类 号：TU528[建筑科学—建筑技术科学] TQ172[化学工程—水泥工业]