Synthesis, Characterization of Biomimetic Petal-Like Electro-active Polyimide Surface Coating and Their Comparative Studies in Corrosion Protection Application

• Main Authors: Hui-Ling Chen, 陳慧玲
• Other Authors: Jui-Ming Yeh
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/55572988730857032641

碩士 === 中原大學 === 化學研究所 === 104 === In this dissertation, the nanocasting technique was used to transfer the pattern of petal surface micro- structure of two neutral plants (i.e., Rose of Grand Gala and Camellia of Fen Chiu Chu) into the surface of artificial electroactive polyimide (EPI) coating, followed by studying the anticorrosive effect through performing a series of electrochemical corrosion protection studies of hydrophobic EPI coating with biomimetic structures in saline conditions. First of all, the amine-capped aniline trimer (ACAT) was synthesized by oxidative coupling reactions, followed by characterized through nuclear magnetic resonance (NMR) spectroscopy, Fourier Transformation infrared (FTIR) spectroscopy and mass spectroscopy (MS). The EPI was subsequently prepared by imidization reaction between ACAT and commercial dianhydride, followed by carrying out a series of polymeric structural characterizations. Nanocasting technique was employed to transfer the micro-scaled patterns from two surface of natural plant petals with soft template of poly(dimethylsiloxane) (PDMS) to EPI coatings. Morphological images of EPI coating biomimetic surface structure was investigated by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Superhydrophobicity of as-prepared coatings with two different biomimetic structures was measured and compared by contact angle of water droplets. It should be noted that the coating with biomimetic structure of Rose of Grand Gala petal was found to exhibited higher contact angle of water droplets as compared to that of Camellia of Fen Chiu Chu petal, implying that the coating with biomimetic structure of Rose of Grand Gala petal may revealed a better corrosion protection as compared to its counterpart. Moreover, corrosion protection effect of coatings with/without biomimetic structure was investigated by a series of electrochemical corrosion measurements.