刘 静,刘小艳,赵亚州,田 甜,艾 婷
刘静,刘小艳,赵亚州,等.复掺碳纳米管/碳纤维水泥基材料电化学阻抗谱研究[J].混凝土与水泥制品,2018(1):54-57.
LIU J,LIU X Y,ZHAO Y Z,et al.Research on Electrochemical Impedance Spectroscopy of Carbon Nanotubes/Carbon Fiber Modified Cement-based Materials[J].China Concrete and Cement Products,2018(1):54-57.
复掺碳纳米管/碳纤维水泥基材料电化学阻抗谱研究
刘 静,刘小艳,赵亚州,田 甜,艾 婷
刘静,刘小艳,赵亚州,等.复掺碳纳米管/碳纤维水泥基材料电化学阻抗谱研究[J].混凝土与水泥制品,2018(1):54-57.
LIU J,LIU X Y,ZHAO Y Z,et al.Research on Electrochemical Impedance Spectroscopy of Carbon Nanotubes/Carbon Fiber Modified Cement-based Materials[J].China Concrete and Cement Products,2018(1):54-57.
摘 要:研究了龄期和碳纳米管掺量对复掺碳纳米管/碳纤维水泥基材料电化学阻抗谱的影响,结合碳纳米管/碳纤维复掺水泥基材料等效电路图,分析了碳纳米管/碳纤维复掺水泥基材料导电性能的影响因素。结果表明,随着碳纳米管掺量的增加,碳纳米管改性水泥基材料阻抗值降低;随着龄期的增长,碳纳米管改性水泥基材料阻抗值逐渐增加;随着碳纳米管掺量增加,碳纤维/碳纳米管复掺水泥基材料孔溶液的电阻Rs几乎不变,0.2%碳纤维/0.5%碳纳米管水泥基材料的电荷传递电阻Rct值相比于0.2%碳纤维水泥基材料的Rct值减小了91.1%,基体电阻Rc值减小了95%,说明碳纳米管能大大改善水泥基材料导电性能。
Abstract: The impact of the age and dosage of carbon nanotubes on the electrochemical impedance spectroscopy of carbon nanotubes/carbon fiber modified cement-based materials was studied, and the equivalent circuit diagram of carbon nanotubes/carbon fiber modified cement-based materials was studied to analyze the influencing factor on the conductive mechanism of carbon nanotubes/carbon fiber modified cement-based materials. The results show that as the dosage of carbon nanotubes increases, impedance values of carbon nanotubes modified cement-based materials will reduce. The impedance values of carbon nanotubes modified cement-based materials will increase as time goes on. With the content of carbon nanotube increasing, resistance Rct produced by reaction of charge transferring and the impedance values of carbon nanotubes/carbon fiber modified cement-based materials reduce with resistance Rs of pore solution Rs abidingly. Rct values of 0.2% carbon fiber/0.5% carbon nanotube modified cement-based materials compared to Rct of the 0.2% carbon fiber cement-based materials values decreases by 91.1% and the Rc value decreases by 95%, which illustrates carbon nanotube can greatly improve the conductive performance of cement-based materials.
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