P(VA-g-MAA)/Ag气敏传感复合材料的制备与性能研究  

Preparation and Properties of P(VA-g-MAA)/Ag Gas Sensing Composite

作　　者：邸宏伟 张楠 司志财 董俊玲 王雅婷 张鑫茹 Di Hongwei;Zhang Nan;Si Zhicai;Dong Junling;Wang Yating;Zhang Xinru(College of Chemistry and Chemical Engineering,Ningxia Normal University,Guyuan 756000,China;Ningxia Liupanshan Water Affairs Co.,Ltd.,Guyuan 756000,China)

机构地区：[1]宁夏师范大学化学化工学院,宁夏固原756000 [2]宁夏六盘山水务有限公司,宁夏固原756000

出　　处：《山东化工》2024年第17期6-8,共3页Shandong Chemical Industry

基　　金：宁夏自然科学基金(2020AAC03261,2022AAC03306);宁夏师范大学化学化工学院科学研究项目(HGZD21-14)。

摘　　要：近年来,化工厂爆炸事故层出不穷,有毒、易燃气体泄漏带来的安全风险与日俱增,设计制备监测气体的高分子气敏传感材料是迫切需要解决的问题。高分子/纳米银导电复合材料可以作为高分子气敏传感材料,用于检测易燃易爆有毒有害气体。以硝酸铈铵为引发剂,将甲基丙烯酸接枝到聚乙烯醇上,制得聚乙烯醇-接枝-聚甲基丙烯酸(P(VA-g-MAA))胶糊,然后以P(VA-g-MAA)为模板或纳米反应器,用柠檬酸三钠原位还原AgNO_(3),制得银纳米粒子导电高分子胶糊。由红外光谱测试可见,样品红外谱图有聚乙烯醇和甲基丙烯酸特征吸收峰,说明成功制备了P(VA-g-MAA)。用扫描电镜(SEM)观察所得银纳米粒子形貌,发现银纳米粒子为球形。用制得的P(VA-g-MAA)/Ag糊状物涂覆在电极片上,制得气敏传感元件,然后在不同的有机溶剂中测其电阻值,发现丙酮及石油醚溶剂响应性高,可作为检测丙酮及石油醚的气敏传感器。In recent years,explosive accidents in chemical plants have emerged in an endless stream,and the safety risks caused by the leakage of toxic and flammable gases are increasing day by day.The design and preparation of polymer gas sensing materials for monitoring gases is an urgent issue to be addressed.Polymer/nano silver conductive composites can be used as polymer gas sensing materials for the detection of flammable,explosive,toxic,and harmful gases.Poly(vinyl alcohol graft methacrylic acid)(P(VA-g-MAA))paste was prepared by grafting methacrylic acid onto polyvinyl alcohol using ceric ammonium nitrate as an initiator.Then,silver nanoparticles conductive polymer paste was prepared using P(VA-g-MAA)as a template or nanoreactor,and AgNO_(3)was in-situ reduced with trisodium citrate.According to infrared spectroscopy testing,the sample has characteristic absorption peaks of polyvinyl alcohol and methacrylic acid in the infrared spectrum,indicating the successful preparation of P(VA-g-MAA).The morphology of silver nanoparticles was observed by scanning electron microscopy(SEM),and it was found that the silver nanoparticles were spherical.The prepared P(VA-g-MAA)/Ag paste was coated on the electrode sheet to prepare a gas sensing element.The resistance values were measured in different organic solvents.It was found that the acetone and petroleum ether solvents had high responsiveness and could be used as gas sensors for detecting acetone and petroleum ether.

关 键 词：纳米导电高分子复合材料 高分子气敏传感材料 聚乙烯醇-接枝-聚甲基丙烯酸 银纳米粒子 

分 类 号：TQ314.2[化学工程—高聚物工业]