三取代己烷聚塞吩-二氧化矽之複合材料製備及其在電變色與防腐蝕之應用研究

Preparation and Properties of Poly(3-hexylthiophene) –Silica Hybrid Material for Anticorrosion and Electrochromic Applications

賴政遠(Cheng-Yuan Lai)

指導教授 ： 葉瑞銘

中原大學/理學院/化學研究所/碩士(2004年)

https://doi.org/10.6840/cycu200400369

摘要

本研究主要是利用N-(3-trimethoxysilylpropyl)pyrrole（3TPP）當作有機導電高分子—三取代已烷聚塞吩（Poly(3-hexylthiophene)，P3HT）與四乙氧基矽烷（Tetraethoxysilane，TEOS）間的偶合劑(coupling agent)，首先先將三取代已烷塞吩（3-hexylthiophene）與3TPP單體以FeCl3為氧化劑進行氧化共聚合反應，作為往後與TEOS進行溶膠-凝膠反應的前驅物(precursor)，當前驅物與TEOS進行溶膠-凝膠反應後，將其塗佈在ITO透明導電玻璃基材上，藉由TEOS酸催化後產生之Si-OH官能基與ITO玻璃上之-OH進行共縮合反應形成的Si-O-ITO共價鍵，來有效提升導電高分子對於ITO玻璃的附著性，以增加電變色塗層的變色壽命，附著性提升可由百格測試（Scotch Tape Test）及電化學伏安法來量測。矽氧網狀結構導入後，對於導電高分子的電化學性質及光學性質也會產生不同的影響，因此本實驗藉由循環電位儀與紫外光/可見光光譜儀來觀察其中的變化。
另一方面，由於若將導電高分子塗佈在鐵片上會促使表面形成惰性氧化層，避免鐵片繼續腐蝕，而TEOS的導入，一方面與鐵片的表面形成Si-O-Fe之共價鍵，因此可有效提升導電高分子附著於鐵片的能力，藉此提高抗腐蝕性；另一方面，溶膠-凝膠反應所形成矽氧無機網狀結構的排水性可延遲水氣附著於鐵片上，達到防蝕效果；本實驗結合上述三種防蝕機制，以不同比例之TEOS導入聚塞吩後，以反射式紅外線光譜儀證實Si-O-Fe的共價鍵產生，百格測試證實附著性的提升，水滴接觸角與吸水率了解矽氧無機網狀結構的排水性，最後利用電化學的防腐蝕測試證明TEOS的導入，提升材料的抗腐蝕性。

關鍵字

電變色材料 ； 導電高分子

並列摘要

In this research, N-(3-trimethoxysilylpropyl)pyrrole was employed as a coupling agent to connect organic poly(3-hexylthiophene) and inorganic TEOS to prepare a series durable organic-inorganic hybrid electro-chromic coatings. First, copolymers (i.e., sol-gel precursor) including 3-hexylthiophene monomers and N-(3-trimethoxysilylpropyl)pyrrole were synthesized by chemical oxidation with FeCl3 as oxidant and then followed the hydrolysis and co-condensation process to complete the sol-gel reaction with TEOS. The as-prepared sol-gel solutions were subsequently cast on the ITO glass substrates and microslides, followed by heating up to 150℃ for 24 hours. The enhancement of adhesion for the hybrid coatings was evaluated by Scotch tape test and electrochemical Voltammetric studies. Moreover, this study investigate electrochemical and optical influences by Votlammergram and UV-Vis spectrophotometer as ≡Si-O-Si≡ network induct electrochromic materals—P3HT.
On the other hand, The organic-inorganic hybrid conductive polymers—P3HT/SiO2 was found to protect steel from corrosion as a result of three mechanisms：1. conductive polymers induce the inertly oxidative layer to avoid corrosion, 2. the covalent bond—Fe-O-Si configurating enhances adhesive ability of conductive polymers on steel, 3. the ≡Si-O-Si≡ structure is hydrophobic and prevents moistures from interpenetrating. Thus, this research proves the covalent bond—Fe-O-Si by RAS-FTIR spectroscopy, the adhesive ability by Scotch Tape Test and the hydrophobicity of ≡Si-O-Si≡ structure was proven by water contact angle and moisture absorption test. Finally, it found that the enhancement of anticorrosive ability due to ≡Si-O-Si≡ network inducting conductive polymers by electrochemical Voltammetric test.

並列關鍵字

Electrochromic Matrials ； Conductivite Polymer

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