乙烯基POSS-丙烯酸酯杂化共聚物湿敏材料的湿度响应稳定性  

Stability of Humidity Response of Octavinyl POSS-acrylate Hybrid Copolymer Humidity-sensitive Material

作　　者：宇雪婷 马旭 陈观银 凌粤强 邱智杰 靳焘[1,2,3,4,5] 陈玉放 YU Xueting;MA Xu;CHEN Guanyin;LING Yueqiang;QIU Zhijie;JIN Tao;CHEN Yufang(Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650,China;University of Chinese Academy of Sciences,Beijing 100049,China;CAS Engineering Laboratory for Special Fine Chemicals,Guangzhou 510650,China;CASH GCC Shaoguan Research Institute of Advanced Materials,Shaoguan 512400,China;CASH GCC Fine Chemicals Incubator(Nanxiong)Co.,Ltd,Nanxiong 512400,China)

机构地区：[1]中国科学院广州化学研究所,广东广州510650 [2]中国科学院大学,北京101408 [3]中国科学院新型特种精细化学品工程实验室,广东广州510650 [4]国科广化韶关新材料研究院,广东韶关512400 [5]国科广化精细化工孵化器(南雄)有限公司,广东南雄512400

出　　处：《广州化学》2024年第5期9-16,共8页Guangzhou Chemistry

基　　金：重庆自然科学基金(CSTB2022NSCQ-MSX0986)。

摘　　要：八乙烯基POSS(OV-POSS)是由硅、氧、碳元素组成的一种笼状多面体结构的化合物,基于OV-POSS合成了有机-无机杂化丙烯酸酯共聚物Cop(MBHP_(0.23))。采用红外光谱仪测试材料的分子结构,证明了共聚物Cop(MBHP_(0.23))的成功合成。采用扫描电子显微镜和原子力显微镜观察材料薄膜的表面形貌特征和粗糙度,证明OV-POSS的加入提高了湿敏膜的感湿响应性能。采用热重分析仪测试材料热的稳定性,结果表明材料具有优异的热稳定性。采用LCR数字电桥测试叉指电极的阻值,结果表明材料的湿敏响应曲线具有较高的线性度(r=0.996),较短的响应/恢复时间(14.0s/68.5s),较小的湿滞(0.88%RH)和较低的温变系数(0.035%RH/℃)。采用电化学工作站测试材料薄膜的介电性能,研究了材料的湿度响应机理,表明在低、中湿度范围内由湿敏材料的本征导电占主导,在高湿度范围内由离子导电性占主导地位。The organic-inorganic hybrid acrylate copolymer Cop(MBHP0.23)was synthesized on the basis of octavinyl POSS(OV-POSS),a compound with a caged polyhedral structure consisting of the elements silicon,oxygen,and carbon.The molecular structure of the material was tested using infrared spectroscopy,which proved the successful synthesis of copolymer Cop(MBHP0.23).Scanning electron microscope and atomic force microscope were used to observe the surface morphology characteristics and roughness of the material film,which proved that the incorporation of OV-POSS improved the humidity-sensitive response performance of the film.A thermogravimetric analyzer was used to test the thermal stability of the material,and the results showed that the material has excellent thermal stability.The resistance values of the fork finger electrodes were tested using an LCR digital bridge,and the results showed that the moisture-sensitive response curves of the materials had a high linearity(r=0.996),a short response/recovery time(14.0 s/68.5 s),a small wet hysteresis(0.88%RH),and a low temperature change coefficient(0.035%RH/℃).The humidity response mechanism of the materials was investigated using an electrochemical workstation to test the dielectric properties of the films.It is dominated by the intrinsic conductivity of the moisture-sensitive material in the low and medium humidity ranges,and by the ionic conductivity in the high humidity range.

关 键 词：OV-POSS 溶液聚合 杂化共聚物 湿度传感器 温变稳定性 响应特性 

分 类 号：TB332[一般工业技术—材料科学与工程]