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180203丨掺杂态聚苯胺的乳液聚合及其与环氧树脂所制涂层的耐蚀性

   日期:2018-02-06     作者:宋航,王华等    浏览:1236    评论:0    
核心提示:中文核心期刊,中国科技核心期刊! DOI: 10.19289/j.1004-227x.2018.02.003掺杂态聚苯胺的乳液聚合及其与环氧树脂所制涂层的耐蚀
 

中文核心期刊,中国科技核心期刊!


 

 

 

DOI: 10.19289/j.1004-227x.2018.02.003

掺杂态聚苯胺的乳液聚合及其与环氧树脂所制涂层的耐蚀性

 

 

宋航,王华,钱晨(大连理工大学化工学院,辽宁 大连 116023)

摘要:  以十二烷基苯磺酸钠(SDBS)为乳化剂,采用乳液聚合法制备了盐酸或磷酸与十二烷基苯磺酸(DBSA)共掺杂的聚苯胺 [(HCl+DBSA)-PANI 或(H3PO4+DBSA)-PANI]。用扫描电镜、傅里叶变换红外光谱仪、X 射线衍射仪和四探针电导率测试仪表征了掺杂聚苯胺的形貌、结构和电导率。将添加了掺杂态聚苯胺的E44 环氧树脂刷涂在Q235 低碳钢表面得到复合涂层(PANI/EP),并通过电化学阻抗谱和浸泡试验考察了它们在3.5% NaCl 溶液中的耐蚀性。两种共掺杂态聚苯胺都呈束状结构,(HCl+DBSA)-PANI的结构更均一。添加PANI 可以明显提高环氧涂层对碳钢的防腐作用,其中(HCl+DBSA)-PANI 的效果更好。

关键词:聚苯胺;环氧树脂;质子酸;十二烷基苯磺酸;共掺杂;复合涂层;低碳钢;耐蚀性

中图分类号:TQ630.4             

文献标志码:A                  

文章编号:1004 – 227X (2018) 02– 0054 – 07

 

 

 

Emulsion polymerization of doped polyaniline and anticorrosion performance of the epoxy coating prepared with it//SONG Hang, WANG Hua*, QIAN Chen

 

 

Abstract: Polyaniline co-doped by hydrochloric acid or phosphoric acid withdodecylbenzenesulfonic acid (DBSA)[(HCl+DBSA)-PANI or (H3PO4+DBSA)-PANI] was synthesized by emulsion polymerization using sodium dodecyl benzenesulfonate (SDBS) as emulsifier. The morphology, molecular structure and electrical conductivity of the doped polyanilines were characterized by scanning electron microscope, Fourier-transform infrared spectroscope, X-ray

diffractometer and four-point probe conductivity tester. The E44 epoxy resin mixed with the doped polyanilines was brushed on the surface of Q235 mild steel to form composite coatings (PANI/EP), whose corrosion resistance were evaluated by

electrochemical impedance spectroscopy and immersion test in 3.5% NaCl solution. Both co-doped PANIs present filamentary structure and the structure of (HCl+DBSA)-PANI is more uniform. The addition of PANI, especially the (HCl+DBSA)-PANI, greatly enhances the anticorrosion property of epoxy coating for mild steel.

Keywords: polyaniline; epoxy resin; protonic acid; dodecylbenzenesulfonic acid; co-doping; composite coating; mild steel;

corrosion resistance

First-author’s address:School of Chemical Engineering, Dalian University of Technology, Dalian 116023, China

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