Electrochemical performance of organic film on copper surface by polymer plating of 6-mercapto-1, 3, 5-triazine-2, 4-dithiol monosodium
The 6-mercapto-1,3,5-triazine-2,4-dithiol monosodium (TTN) compound was used to fabricate an organic film on pure copper.The polymer plating process of TTN on pure copper in Na2CO3 aqueous solution and the growth mechanism of poly(6-mercapto-1,3,5-triazine-2,4-dithiol) (PTT) film were studied by means of cyclic voltammetry.The polymer plating under galvanostatic mode at 0.05 mA/cm2 was conducted to generate PTT film on pure copper in the same electrolyte with different polymer-plating time.The film mass was determined by electronic balance and the insoluble fraction in tetrahydrofuran (THF) Is tested.The performance of organic film formed on copper surface was investigated preliminarily by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS).It is found that a slight peak measured at 0 V vs SCE attributes to the oxidation of copper and generated Cu+ or/and Cu2+ to produce Cu-TTN complex,then a strong oxide peak is observed at 0.311 V vs SCE due to the polymerization of TTN for the increase of the film thickness.Electrochemical measurement results reveal that 10 min is an optimum polymer-plated time to obtain high quality film.The results of potentiodynamic polarization show that current density decreases from 1.85 μA/cm2 for bare copper to 0.168 μA/cm2 for polymer-plated copper while polymer-plated time is 10 min.The charge transfer resistances of bare copper and polymer-plated copper are 937 Ωcm2 and 11.12 kΩ·cm2,respectively.The film capacitor for polymer-plated copper is as low as 1.82 μF·cm2.The EIS results confirm the results of potentiodynamic polarization and reveal that a homogenous and compact film is obtained by polymer plating technique.
copper polymer plating organic film potentiodynamic polarization electrochemical impedance spectroscopy
YE Qi KANG Zhi-xin LI Yuan-yuan
School of Mechanical Engineering,South China University of Technology,Guangzhou 510640,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）