Nano-casting technique to prepare polyaniline surface with biomimetic superhydrophobic structures for anticorrosion application

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• 作者：Chih-Wei Peng^a ; Kung-Chin Chang^a ; ^b ; Chang-Jian Weng^a ; Mei-Chun Lai^a ; ^b ; Chien-Hua Hsu^a ; Sheng-Chieh Hsu^a ; Yu-Yuan Hsu^a ; Wei-I Hung^a ; ^c ; Yen Wei^d ; Jui-Ming Yeh^a ; ^{juiming@cycu.edu.tw}
• 关键词：Superhydrophobic ; Anticorrosion ; Polyaniline ; Biomimetic ; Nanocasting
• 刊名：Electrochimica Acta
• 出版年：2013
• 出版时间：15 April, 2013
• 年：2013
• 卷：95
• 期：Complete
• 页码：192-199
• 全文大小：1295 K

文摘

In this paper, polyaniline (PANI) surface with biomimetic superhydrophobic structures was first prepared by the nanocasting technique and applied in corrosion protection coatings. First of all, PANI was synthesized by conventionally oxidative polymerization of aniline with ammonium persulfate (APS) as oxidant in 1.0 M HCl aqueous solution. Subsequently, PANI with superhydrophobic surface (SH-PANI) of biomimetic natural leaf was fabricated, using PDMS as negative template, through casting onto cold rolled steel (CRS) electrode. Morphology of as-prepared PANI superhydrophobic surface was investigated by SEM. The contact angle of water droplet on sample surface can be increased from ¡«90¡ã of flat PANI surface (F-PANI) to ¡«156¡ã of SH-PANI. It should be noted that the SH-PANI was found to reveal better corrosion protection as compared to the F-PANI, base on a series of standard electrochemical corrosion measurements in saline conditions.