酒石酸二次掺杂聚苯胺纳米纤维的防腐性能

郜二芬a， 杨小刚b*， 金思毅a

（青岛科技大学a.化工学院；b.环境与安全工程学院，山东 青岛 266042）

摘要： 采用直接混合氧化法在酒石酸体系中合成了掺杂态和二次掺杂态聚苯胺。通过扫描电镜、红外光谱仪和紫外可见光谱仪对聚苯胺产物的形貌及结构进行表征，并且对聚苯胺/环氧树脂复合涂层的防腐性能进行了电化学测试。结果表明，酒石酸二次掺杂态聚苯胺有规整的纳米纤维形貌，且二次掺杂态聚苯胺涂层比一次掺杂态聚苯胺涂层对碳钢具有更好的防腐性能。随着浸泡时间的延长，聚苯胺涂层对碳钢的防腐效果有所下降，浸泡30 d后二次掺杂态聚苯胺涂层的开路电位比一次掺杂态高出125 mV，阻抗值比一次掺杂态高出一个数量级。

关键词： 聚苯胺； 纳米纤维； 掺杂； 有机酸； 防腐性能

中图分类号： TG 174                   文献标志码： A

Anticorrosion Property of Polyaniline Nanofibers Redoped with Tartaric Acid

GAO Erfena, YANG Xiaogangb, JIN Siyia

(a.College of Chemical Engineering；b.College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

Abstract: Doped and redoped polyaniline (PANI) nanofibers were prepared by direct mix oxidation in tartaric acid system. The morphology and structure of the polyaniline was characterized by scanning electron microscopy (SEM), FTIR spectra and UVVis spectra, and the anticorrosion property of polyaniline/epoxy coatings was tested with electrochemical workstation. Results indicated that the redoped polyaniline in tartaric acid had more regular nanofibers, and the redoped polyaniline coating had a better anticorrosion performance than doped polyaniline coating. The anticorrosion ability of two polyaniline coatings to mild steel was decreased with the extension of immersion time. The open circuit potential (OCP) of redoped polyaniline coating was improved 125 mV and the impedance value of redoped polyaniline coating was a order of magnitude higher than doped polyaniline coating after immersing for 30 d.

Key words: polyaniline; nanofiber; dope; organic acid; anticorrosion property

收稿日期： 20131202

基金项目： 国家自然科学基金项目（41106070）；山东省自然科学基金项目（ZR2009EQ008）.

作者简介： 郜二芬（1989—），女，硕士研究生.             *通信联系人.