温度和湿度对纳米石墨烯片水泥基复合材料压敏性能的影响  

Influence of temperature and humidity on the piezoresistive properties of graphene nanoplatelets reinforced cement-based composites

作　　者：未立煌 夏海廷[1,2] 郭荣鑫[1] 索玉霞 吴一晨 WEI Lihuang;XIA Haiting;GUO Rongxin;SUO Yuxia;WU Yichen(Yunan Key Laboratory of Disaster Reduction in Civil Engineering,Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;Faculty of Civil Aviation and Aeronautics,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院云南省土木工程防灾重点实验室,云南昆明650500 [2]昆明理工大学民航与航空学院,云南昆明650500

出　　处：《混凝土》2023年第3期7-11,18,共6页Concrete

基　　金：国家自然科学基金(11962009)。

摘　　要：研究了纳米石墨烯片水泥基复合材料(GNPs/CC)在不同温度和湿度下的压敏性能。研究结果表明:GNPs/CC在20℃下的压敏性能最佳。温度的升高和降低都会导致GNPs/CC压敏性能的削弱,温度升高会导致灵敏因子出现小幅度的波动,但电阻变化率曲线的线性程度基本不受影响;温度降低则会导致灵敏因子大幅度降低,并导致GNPs/CC电阻变化率曲线的线性程度降低。0RH湿度下,GNPs/CC的压敏性能最佳;65%RH的湿度几乎不会改变GNPs/CC的含水率,对其压敏性能无明显影响;98%RH的湿度会使GNPs/CC的含水率快速增加,并导致了GNPs/CC压敏性能的削弱。The piezoresistive properties of graphene nanoplatelets reinforced cement-based composites(GNPs/CC)under different temperatures and humidity were studied.The results show that the piezoresistive properties of GNPS/CC at 20℃is optimal.The increase and decrease of temperature will lead to the weakening of the piezoresistive properties of GNPs/CC.The increase of temperature will lead to a small fluctuation of the gauge factor,but the resistance variationcurve is basically unaffected.The decrease of temperature will lead to the decrease of geuge factor and the decrease of linearity of resistance variation curve.The piezoresistive properties of GNPS/CC at 0RH is optimal.The humidity of 65%RH hardly changes the moisture content of GNPs/CC.Therefore,the humidity of 65%RH has no significant effect on the piezoresistive properties of GNPS/CC.The humidity of 98%RH will increase the moisture content of GNPs/CC a lot and weaken the piezoresistive properties of GNPS/CC.

关 键 词：纳米石墨烯片 水泥基复合材料 压敏性能 温度 湿度 

分 类 号：TU528.01[建筑科学—建筑技术科学]