聚乙烯咔唑/乙烯基三乙氧基硅烷改性碳纳米管气敏传感器的制备及性能研究

The Exploration and Practice of Teaching Research Integrated Polymer Chemistry Comprehensive Experiment Course Based on Core Literacy Promotion

该文以乙烯基三乙氧基硅烷改性碳纳米管为导电填料,以N-乙烯基咔唑为聚合单体,采用原位溶液聚合方法,在引发剂偶氮二异丁腈作用下聚合制得聚乙烯咔唑/乙烯基三乙氧基硅烷改性碳纳米管复合导电胶糊(PVK/VTEO-MWCNT-OH).通过红外光谱测其化学结构,通过扫描电镜观察聚合物包覆碳纳米管情况.研究结果表明:聚乙烯咔唑包覆在碳纳米管上,改善了碳纳米管的分散性.用制得的复合导电胶糊涂覆在电极片上,制得气敏传感元件,并测其在不同的有机溶剂中的气敏响应性.实验结果表明:制备的气敏传感薄膜对四氢呋喃蒸汽响应强度最好.

In this paper,the composite conductive paste of polyvinylcarbazole/vinyl triethoxysilane modified carbon nanotubes(PVK/VTEO-MWCNT-OH) is prepared by in-situ solution polymerization with vinyl triethoxysilane modified carbon nanotubes as the conductive filler,N-vinyl carbazole as the polymerization monomer,and azodiisobutyronitrile as the initiator.After a part of it is taken out and dried in vacuum,its chemical structure is measured by infrared spectroscopy.The results show that the dispersion of carbon nanotubes is improved by coating polyvinylcarbazole on carbon nanotubes.The gas sensing element is prepared by coating the prepared composite conductive adhesive paste on the electrode plate,and its gas sensitivity is measured in different organic solvents.The results show that the prepared gas sensing film has the best response strength to tetrahydrofuran vapor.