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中国腐蚀与防护学报  2016, Vol. 36 Issue (4): 306-312    DOI: 10.11902/1005.4537.2015.149
  研究报告 本期目录 | 过刊浏览 |
酞菁铜二磺酸改性聚苯胺的制备及耐蚀性能
李小宝,徐利,刘怡宏,廖婷,李明田(),崔学军
四川理工学院材料科学与工程学院 材料腐蚀与防护四川省重点实验室 自贡 643000
Preparation and Corrosion Properties of Polyaniline Doped with Copper Phthalocyanine Disulfonic Acid
Xiaobao LI,Li XU,Yihong LIU,Ting LIAO,Mingtian LI(),Xuejun CUI
Key Laboratory of Material Corrosion and Protection of Sichuan Province, College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000,China
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摘要: 

以自制酞菁铜二磺酸 (CuPc-(SO3H)2) 为原料,采用“掺杂-脱掺杂-再掺杂”方法对本征态聚苯胺 (EBPANI) 进行导电改性。IR和UV-Vis分析表明,CuPc-(SO3H)2成功地对EBPANI进行了掺杂改性。四探针仪测试改性后的聚苯胺电导率为1.95 S/cm。通过电化学、耐酸性和中性盐雾实验等方法检测聚苯胺涂层的耐蚀性能,结果表明,CuPc-(SO3H)2能有效地掺杂EBPANI,在5%(质量分数) HCl溶液中浸泡15 d和中性盐雾实验12.5 d,CuPANI涂层只出现少量气泡和8%的白霜,在3.5%NaCl溶液中CuPANI涂层使Fe的腐蚀电位从-0.849 V正移至-0.646 V,说明CuPANI涂层对钢基片具有良好的防腐蚀性。
关键词 ： 涂层,  聚苯胺,  酞菁铜磺酸,  导电,  耐蚀    
Abstract：

The copper phthalocyanine disulfonic acid CuPc-(SO3H)2 (CuPANI) was prepared with direct fast turquoise blue GL as raw material, and then the CuPANI doped polyaniline was obtained by chemical reaction of eigenstate polyaniline (EBPANI) with CuPc-(SO3H)2 in N,N′-dimethylformamide. The doped polyaniline was characterization by IR, UV-Vis and four point probe. The coatings with EBPANI or CuPANI as filler and epoxy resin 44 (EP-44) and 107 glue as adhesives were prepared on the surface of pretreated steel sheets, while the corrosion behavior of the sheets without and with coatings with EBPANI and CuPANI in 3.5%NaCl solution was investigated by electrochemical methods such as tafel polarization curve measurement, and alternating current impedance spectroscopy, respectively. The results indicated that the CuPANI doped polyaniline coating shows better anticorrosion performance.
Key words： coating    polyaniline    copper phthalocyanine disulfonic acid    conduction    anticorrosion
    
基金资助:国家自然科学基金项目 (51303115),四川省教育厅项目(15ZB0205)和大学生创新创业训练计划项目 (201610622035) 资助
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李小宝
徐利
刘怡宏
廖婷
李明田
崔学军

引用本文:

李小宝,徐利,刘怡宏,廖婷,李明田,崔学军. 酞菁铜二磺酸改性聚苯胺的制备及耐蚀性能[J]. 中国腐蚀与防护学报, 2016, 36(4): 306-312.
Xiaobao LI, Li XU, Yihong LIU, Ting LIAO, Mingtian LI, Xuejun CUI. Preparation and Corrosion Properties of Polyaniline Doped with Copper Phthalocyanine Disulfonic Acid. Journal of Chinese Society for Corrosion and protection, 2016, 36(4): 306-312.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2015.149      或      https://www.jcscp.org/CN/Y2016/V36/I4/306

图1  EBPANI和CuPANI的红外光谱
图2  EBPANI和CuPANI的紫外可见光吸收光谱
图3  EBPANI和CuPANI的热重曲线
图4  CuPANI涂层的划格实验结果
图5  PANI涂层经5%HCl溶液腐蚀前后的表面形貌
图6  PANI涂层经中性盐雾实验后的表面形貌
Coating Time / d
1 2 3 6 7 10 12.5 15 17.5 20
EBPANI 1 1 1 2 3 4 4 5 --- ---
CuPANI 1 1 1 1 2 2 3 3 4 4
表1  两种PANI涂层中性盐雾实验结果
图7  PANI涂层在3.5%NaCl溶液中的极化曲线
Coating Ecorr / V Icorr / Acm-2
Fe -0.849 5.399×10-4
EBPANI -0.773 6.573×10-5
CuPANI-15 d -0.705 2.173×10-6
CuPANI-7 d -0.688 2.347×10-6
CuPANI-3 d -0.682 2.339×10-6
CuPANI-1 d -0.652 5.332×10-6
CuPANI -0.646 7.832×10-7
表2  试样的腐蚀电位和腐蚀电流密度
图8  PANI涂层在3.5%NaCl溶液中的EIS
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