合成、鑑定仿生電活性聚月尿酯塗料及其在腐蝕防護之應用研究

Synthesis, Characterization of Biomimetic Electroactive Polyurethane Coatings and Their Application on Corrosion Protection

鍾定修(Ting-Hsiu Chung)

指導教授 ： 葉瑞銘

中原大學/理學院/化學研究所/碩士(2015年)

https://doi.org/10.6840/cycu201500542

摘要

中文摘要
本研究將具有電活性的苯胺三聚體（ACAT）導入聚脲酯中，成功的製備出高機械強度及超疏水結構的電活性聚脲酯彈性體，並且有效的應用在防水以及防腐蝕中。
首先利用苯胺與4,4'-二氨基二苯胺(para-phenylenediamine)合成出苯胺三聚體，以傅利葉轉換紅外線光譜儀（FTIR）、核磁共振儀（1H-NMR）和電噴霧離子源時間飛行質譜儀（ESI-TOF Mass）進行結構鑑定與分析，再以循環伏特安培儀（CV）驗證ACAT 具有氧化還原的能力。
聚脲酯預聚體是利用異佛爾酮二異氰酸酯（IPDI）與聚醚二元醇（PTMG）進行反應。接著將聚脲酯預聚體與ACAT 共聚合製備出具電活性聚脲酯彈性體（EPU）；而聚脲酯預聚體與異佛爾酮二胺（IPDA）共聚合製備出非電活性聚脲酯彈性體（NEPU）。
探討利用模板複印法來仿造千年芋表面結構，製備超疏水電活性聚脲酯彈性體（SEPU），材料本身具有氧化還原能力經模板複印使材料具有超疏水特性達到排水效果提升防腐蝕能力。研究中探討超疏水電活性聚脲酯彈性體（SEPU）材料之基本鑑定、接觸角和防腐蝕性質。使用接觸角量測儀量測其薄膜之接觸角，得知合成出超疏水電活性聚脲酯彈性體（SEPU）接觸角上升約95˚；接著進行電化學防腐蝕測試，結果顯示其腐蝕速率比冷軋鋼高。顯著改善防腐蝕保護的原因是：除了電活性聚脲酯所產生的鈍性氧化層以外，還有模板複製後的微結構所造成疏水性的協同效應。

關鍵字

電活性 ； 聚脲酯 ； 彈性體 ； 防腐蝕 ； 超疏水

並列摘要

Abstract
The successful preparation of high mechanical property and superhydrophobic structure electroactive polyurethane elastomer containing amine-capped aniline trimer (ACAT) is presented for the first time. First of all, ACAT was synthesized by carrying out oxidative coupling reactions between aniline and para-phenylenediamine, After which it was characterized through Fourier-transformation infrared (FTIR), electrospray ionization time-of-flight mass spetra (ESI-TOF Mass) and Nuclear Magnetic Resonance spectromter (NMR). Finally, the redox behavior of ACAT was further analyzed by cyclic voltammetric (CV).
Subsequently, a polyurethane (PU) prepolymer was prepared by polymerizing diisocyanate of isophorone diisocyanate and diol of polyether. Electroactive polyurethane elastomer (EPU) was then produced by allowing the as-prepared polyurethane prepolymer to react with ACAT under suitable conditions. Non-electroactive polyurethane (NEPU) was also prepared polyurethane prepolymer to react with isophorondiamine (IPDA).
Nanocasting technique was used to obtain a biomimetic superhydrophobic electroactive polyurethane (SEPU) surface structure from a natural Xanthosoma sagittifoliuim leaf. The superhydrophobic electroactive material could be used as advanced coatings that protect metals against corrosion. The morphology of the surface of the as-synthesized SEPU coating was investigated using scanning electron microscopy (SEM). The surface showed numerous micro mastoids, each decorated with many nano wrinkles. The water contact angle (CA) for the SEPU coating was 152.21°, which was significantly larger than that for the EPU coating (i.e., CA=58.75°). The significant increase in the contact angle indicated that the biomimetic morphology effectively repelled water. The developed SEPU coating exhibited superior anticorrosion performance on electrochemical corrosion tests as its corrosion rate is better than the bare steel substrate. The significantly-improved corrosion protection is attributed to, besides the steel substrate isolated by the coating, the synergistic effect of electroactivity and hydrophobic from the SEPU coating dwith the multi-scale structures mimicking the surface of Xanthosoma sagittifoliuim leaf.

並列關鍵字

electroactive ； polyurethane ； anticorrosion ； superhydophobic

參考文獻

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