具側鏈苯胺五聚體之電活性聚醯胺在金屬防腐蝕上之應用研究

呂國精

doi:10.6840/cycu201700870

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具侧链苯胺五聚体之电活性聚醯胺在金属防腐蚀上之应用研究

Synthesis and Characterization Studies of Electroactive Polyamide Coating Containing Pendant Aniline Pentamer for Anticorrosive Application

吕国精 , 硕士　　导师：叶瑞铭　　

繁体中文 DOI： 10.6840/cycu201700870

防腐蚀；电活性；聚醯胺；侧链； anticorrosive ； electroactive ； polyamide ； pendant

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摘要 │ 参考文献 (89) │ 国际计量

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In this dissertation, a series of electroactive co-polyamides containing different feeding ratio of pendant aniline pentamer (AP) were prepared, followed by applied in corrosion protection coating and investigated be a series of standard electrochemical corrosion measurements in saline.  First of all, AP was synthesized by oxidative coupling reaction.  The P-DAM was synthesized by using AP as reactant.   The as-synthesized AP and P-DAM was characterized by proton nuclear magnetic resonance (1H-NMR) spectroscopy, Fourier-Transformation infrared (FTIR) spectroscopy and mass spectroscopy (MS).   The as-prepared P-DAM were reacted with acyl chloride and another diamine to prepare a series of electroactive co-polyamides (EPA-10, EPA-50), followed by characterized through FTIR to confirm the characteristic peak of amide group, indicating the completeness of condensation reactions of polyamides.  Electroactivity of as-prepared electroactive co-polyamides cast onto the indium tin oxide (ITO) electrode can be identified by electrochemical cyclic voltammetry.  Moreover, the chemical oxidation of electroactive co-polyamides was observed by the in-situ monitoring of UV-visible absorption spectroscopy.  The studies showed that the electroactive co-polyamides containing higher ratio of pendant AP exhibited higher electroactivity (i.e., electro-catalytic capability).
    For the corrosion protection coating application, electrochemical measurements, such as Tafel plot, Nyquist and Bode plot, were used to investigate the performance of as-prepared polyamides on cold-rolled steel (CRS) electrodes.  First, the electroactive co-polyamide coatings were found to reveal better corrosion protection than that of non-electroactive polyamide coating. This may be attributed to the electro-catalytic property of electroactive co-polyamide coatings , inducing the formation of densely passive metal oxide layers (e.g., Fe2O3 and Fe3O4) to protect the underlying metallic substrate.  Moreover, it should be noted that electroactive co-polyamide coatings with higher feeding ratio of pendant AP was found to exhibit better corrosion protection as compared to that of electroactive co-polyamide coatings with lower feeding ratio of pendant AP.  This may be related to the electroactive co-polyamide coatings with higher feeding ratio of pendant AP displayed stronger electro-catalytic capability, leading to the formation of more densely passive metal oxide layers.    Passive metal oxide layers formed onto the surface of CRS electrode were further identified by the Raman spectroscopy.

参考文献 ( 89 ) 〈TOP〉

[2] H. Shirakawa, S. Ikeda. Polymer, 2,231 (1971).
连结：
[3] (a) H. Shirakawa, E. J. Louis, A. G. MacDiarmid, C. K. Chiang, A. J.Heeger J. Chem. Soc., Chem. Commum., 578 (1977).(b) C. K. Chiang, C.R. Fincher, Y. W. Park, A. J. Heeger, H. Shirakawa, E. J. Lousi, S. C. Gau, A. G. MacDiarmid, , Phys. Rev Lett., 39,1098 (1977).
连结：
[7] C. Kittel, Introduction to Solid State Physics, 6th Ed. John Wiley& Sons, Singapore, (1986).
连结：
[13] L. Langer, Solid State Commun, 26,839 (1978).
连结：
[14] A. G. MacDiarmid, J. C. Chiang, M. Halpern, W. S. Huang, S. L. Mu, N. L. D. Somasir, Mol. Liq. Cryst.,121,173 (1985).
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DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。 如想对DOI的使用与概念有进一步了解，请参考 （ ） 。

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。