聚苯胺的电化学合成实验教学改进与创新设计  

Experimental Improvement and Innovative Design of Electrochemical Synthesis of Polyaniline

作　　者：张志霞 傅毛生[1] 陈德志[1] 孙青 王芳[1] Zhang Zhixia;Fu Maosheng;Chen Dezhi;Sun Qing;Wang Fang(Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学,江西南昌330063

出　　处：《广东化工》2024年第17期237-239,共3页Guangdong Chemical Industry

基　　金：2023年南昌航空大学创新创业教育教学改革研究课题(SCJG2309);南昌航空大学第三批“课程思政”示范课程(SZ2206)。

摘　　要：现有的聚苯胺的电化学合成教学实验方案中,对化学结构形式不同的聚苯胺颜色转化现象观察不够直观明了,其导电性质测试及实际应用也无提及,已难以满足提升学生综合实践能力的教学要求,需对实验教学内容进行改进与创新设计。以草酸-柠檬酸混合酸替代传统的浓硝酸或浓硫酸,以不锈钢为工作电极,采用循环伏安法替代恒电位法合成聚苯胺。不同氧化程度的掺杂态聚苯胺颜色转化现象能够即时、清晰观察。利用红外光谱对聚苯胺结构进行表征,并通过动电位极化曲线和电化学交流阻抗测试研究其对不锈钢的防腐性能,深刻理解结构与性能的关系。教学改进丰富了实验教学内容,切实提高了实验实践教学质量,同时改进的实验更符合绿色化学理念。The observation of polyaniline color conversion phenomenon in the existing experimental scheme is not intuitive and clear enough,and its conductive property test and practical application is not mentioned,which has been difficult to meet the teaching requirements of improving students'comprehensive practical ability,so the experimental content is improved and designed innovatively.Specifically,the mixed acid between oxalic acid and citric acid is used instead of traditional concentrated nitric acid or concentrated sulfuric acid,and stainless steel is used as the working electrode material to synthesize polyaniline by cyclic voltammetry instead of equipotential method.The color conversion of polyaniline can be observed immediately and clearly.The structure of polyaniline was characterized by the infrared spectrum.The anticorrosion performance was tested by the potentiodynamic polarization curves and electrochemical impedance.The understanding of the relationship between the structure and performance of polyaniline is more profound.This project enriches the experimental teaching content,and achieves the combination of theory and application,and achieves the teaching and training goal of improving comprehensive practical ability.At the same time,the improved experiment conforms to the concepts of green chemistry.

关 键 词：聚苯胺 循环伏安法 草酸-柠檬酸混合酸 绿色化学理念 改进与创新 

分 类 号：TQ317[化学工程—高聚物工业] G64[文化科学—高等教育学]