2023年第5期仪表技术与传感器InstrumentTechniqueandSensor2023No.5基金项目:中央引导地方科技发展资金(YDZX20201400001664);山西省重点研发计划项目(202102030201001,202102030201009)收稿日期:2022-11-01NMP/PVP-MWCNTs湿度传感器制备与测试赵珠杰,雷程,梁庭,谢宇(中北大学,省部共建动态测试技术国家重点实验室,山西太原030051)摘要:碳纳米管制备敏感薄膜时往往会因其分散性差,无法保证纳米薄膜的均匀性,从而影响传感器的性能。使用N-甲基吡咯烷酮(NMP)与聚乙烯吡咯烷酮(PVP)作为分散剂对多壁碳纳米管进行表面活性处理,制备以多壁碳纳米管为湿敏材料的电阻型湿度传感器。传感器用微机电系统(MEMS)工艺制备叉指电极作为湿敏电阻,在100℃下将多壁碳纳米水溶液组装在电极上,使用原子力显微镜(AFM)、扫描电子显微镜(SEM)对湿敏薄膜进行形貌表征。经测试,传感器线性度为0.99806,灵敏度为42.99923Ω/%,相对湿度20%~70%循环测试时响应时间为5s,恢复时间为6s,且传感器具有良好的重复性和稳定性。关键词:多壁碳纳米管(MWCNTs);微电子机械系统(MEMS);纳米复合材料;相对湿度;电阻传感器中图分类号:TP212文献标识码:A文章编号:1002-1841(2023)05-0010-05PreparationandTestingofNMP/PVP-MWCNTsHumiditySensorZHAOZhu-jie,LEICheng,LIANGTing,XIEYu(NorthUniversityofChina,StateKeyLaboratoryofDynamicMeasurementTechnology,Taiyuan030051,China)Abstract:Whencarbonnanotubesareusedtopreparesensitivefilms,theuniformityofthethinfilmscannotbeguaranteedduetothepoordispersion,whichaffectstheperformanceofthesensor.Multi-walledcarbonnanotubes(MWCNTS)weresurfac-tanttreatedwithN-Methylpyrrolidone(NMP)andpolyvinylpyrrolidone(PVP)asdispersantstoprepareresistivehumiditysen-sorsusingMWCNTS.Micro-electromechanicalsystem(MEMS)technologywasusedtofabricatetheinterfingerelectrodeasthewet-sensitiveresistance.Themulti-walledcarbonnano-watersolutionwasassembledontheelectrodeat100℃.Themorphologyofthewet-sensitivefilmwascharacterizedbyatomicforcemicroscope(AFM)andscanningelectronmicroscope(SEM).Aftertesting,thelinearityofthesensoris0.99806andthesensitivityis42.99923Ω/%RH.Whentherelativehumidityis20%~70%,theresponsetimeis5sandtherecoverytimeis6s,andthe...