CAJ | 학술논문

采用化学修饰的多壁碳纳米管(o-MWC-NTs)与 Hummers 法制备的氧化石墨烯(GO)超声混合,加入室温硫化硅橡胶(RTV),利用溶液共混法制备具有湿敏特性的 o-MWCNTs/GO/RTV 复合薄膜.借助于透射电子显微镜(TEM)、红外吸收光谱(FT-IR)等分析手段分别对化学修饰的多壁碳纳米管及氧化石墨烯进行表征,并对基于 o-MWCNTs/GO/RTV的复合薄膜的湿敏性能及湿敏机理进行了探讨.结果表明,混酸处理后的碳纳米管端口打开,侧壁和开端处产生羧基和羟基等官能团,有利于水分子的吸附,同时也有利于与 GO 表面的基团作用,形成三维的纳微米结构,提高了碳纳米管与硅橡胶基体的相容性,使所制备的 o-MWCNTs/GO/RTV 复合薄膜灵敏度提高.当相对湿度在23％~87％的范围,m (GO)∶m (o-MWCNTs)＝1∶3时,o-MWCNTs/GO/RTV 复合薄膜的湿滞为5％RH,灵敏度为0．3152/％RH,响应时间和恢复时间分别为4和27 s.
채용화학수식적다벽탄납미관(o-MWC-NTs)여 Hummers 법제비적양화석묵희(GO)초성혼합,가입실온류화규상효(RTV),이용용액공혼법제비구유습민특성적 o-MWCNTs/GO/RTV 복합박막.차조우투사전자현미경(TEM)、홍외흡수광보(FT-IR)등분석수단분별대화학수식적다벽탄납미관급양화석묵희진행표정,병대기우 o-MWCNTs/GO/RTV적복합박막적습민성능급습민궤리진행료탐토.결과표명,혼산처리후적탄납미관단구타개,측벽화개단처산생최기화간기등관능단,유리우수분자적흡부,동시야유리우여 GO 표면적기단작용,형성삼유적납미미결구,제고료탄납미관여규상효기체적상용성,사소제비적 o-MWCNTs/GO/RTV 복합박막령민도제고.당상대습도재23％~87％적범위,m (GO)∶m (o-MWCNTs)＝1∶3시,o-MWCNTs/GO/RTV 복합박막적습체위5％RH,령민도위0．3152/％RH,향응시간화회복시간분별위4화27 s.
A kind of o-MWCNTs/GO/RTV composite film which was sensitive to humidity was prepared by ul-trasonicly mixing multi-walled carbon nanotubes (MWCNTs)which was chemically modified with graphene ox-ide (GO )which was prepared by Hummers method,adding room temperature vulcanized silicone rubber (RTV)in the paper.The modified multi-walled carbon nanotubes and graphene oxide were characterized by TEM and FT-IR.In addition,the sensing property to humidity and its mechanism of o-MWCNTs/GO/RTV composite film were also discussed in the paper.The results show that the carboxyl groups and hydroxyl groups appear on the sidewalls and at the ends of the carbon nanotubes after they were treated by mixed acid,which was benefit to the adsorption of water molecules on it,and also benefit to reaction with the function group on the surface of GO,forming three-dimensional nano-micron structure and improving the compatibility of the car-bon nanotubes and silicone rubber matrix.The results present that the humidity sensitivity of the prepared o-MWCNTs/GO/RTV composite film was increased.The optimum ratio was that GO/o-MWCNTs was 1/3 when the relative humidity was in the range of 23%-87%,the wet hysteresis of o-MWCNTs/GO/RTV humidi-ty films was 5% RH,the sensitivity of humidity film was 0.3152/% RH,and the response time and recovery time were 4 and 27 s respectively.