酞菁铜二磺酸改性聚苯胺的制备及耐蚀性能

Preparation and Corrosion Properties of Polyaniline Doped with Copper Phthalocyanine Disulfonic Acid

以自制酞菁铜二磺酸(CuPc-(SO_3H)_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-(SO_3H)_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-(SO_3H)_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。

The copper phthalocyanine disulfonic acid CuPc-（SO3H）： （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 CHPc-（SO3H）2 in N,N＇-dimethylfor- mamide. 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 with- out and with coatings with EBPANI and CuPANI in 3.5%NaCI solution was investigated by electro- chemical 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.