- 學位論文
利用環氧樹脂與苯胺寡聚體製備對環境 友善的室溫硬化型電活性高分子 防蝕塗料及其性質探討
Advanced Environmentally Friendly Electroactive Room-Temperature Curable Anticorrosive Polymeric Coatings Prepared From Non-solvent-Based Epoxy Resin Incorporated Amine-Capped Aniline Trimer
摘要
中文摘要 本研究主要是在無溶劑的狀態下，將胺基封端苯胺三聚體(ACAT)和環氧樹脂(Epon 828)利用三滾筒均質分散機將其均勻混合，在室溫下加入硬化劑(B210)持續反應三天後，得到環保型含胺基封端苯胺三聚體之環氧樹脂複合塗料，並將其用於防腐蝕之應用研究。 研究中，將探討胺基封端苯胺三聚體之環氧樹脂複合塗料其基本鑑定、物理性質和防腐蝕性質。首先利用核磁共振儀(NMR)、傅利葉轉換紅外線光譜儀(FT-IR)和電噴霧離子源時間飛行質譜儀(ESI-TOF Mass)對胺基封端苯胺三聚體進行結構的鑑定與分析；再利用減弱全反射傅利葉轉換紅外線光譜儀(ATR-FT-IR)所測量之圖譜觀察環氧樹脂複合塗料其環氧基開環程度，及使用硬度計(durometer)量測樣品硬度，來判斷環氧樹脂複合塗料其硬化與反應程度；接下來使用熱重分析儀(TGA)和示差掃描熱卡計(DSC)測量其熱性質；再利用循環伏特安培儀(CV)和交流阻抗膜組(a.c. impedance spectroscopy)量測防腐蝕相關數據；使用百格試驗和掃描式電子顯微鏡(SEM)觀察其附著性；最後利用鹽霧試驗來觀察其實際腐蝕的情況，並利用化學分析電子儀(ESCA)來觀察鈍性氧化層的存在。 本實驗所開發出的環氧樹脂複合塗料，具有電活性高分子的特性，能有效提升環氧樹脂塗料的防腐蝕能力。藉由各項儀器的測量得知，當添加的胺基封端苯胺三聚體之量增加，環氧樹脂複合塗料的氧化還原能力、阻抗值和防蝕能力都隨之上升，且胺基封端苯胺三聚體的加入，還可以提升硬化的速率，減少反應所需的時間；而因為無溶劑的情況下進行分散和硬化反應，可以減少環境的污染及降低生產的成本。
並列摘要
Abstract In this study, the electroactive aminocapped aniline trimer was introduced as a corrosion inhibitive pigment in an epoxy matrix. The aminocapped aniline trimer (ACAT) could be easily synthesized by oxidative coupling of 1,4-phenylenediamine and two equivalent amounts of aniline with ammonium persulfate as oxidant. The electroactive epoxy coating was prepared by DGEBA as an epoxy resin and B210 as a curing agent with /without blending ACAT through three-roll mill technique, followed by casting to cold-rolled steel (CRS). After aging 3 days at room temperature, the as-prepared electroactive epoxy coatings were obtained. The as-prepared aminocapped aniline trimer was further characterized by FT-IR, NMR and ESI-TOF Mass studies. Study on physical properties of electroactive epoxy coating was investigated based on a series of instrumentation evaluations performed using electrochemical corrosion measurements (Tafel curve and EIS), DSC, TGA, Hardness (durometer) and SEM analysis. Adhesion of electroactive epoxy coating was analyzed according to the cross-cut method. Results indicated that electroactive epoxy coating having higher ACAT content exhibits more effectively enhanced mechanical properties and corrosion protection properties compared to that of neat epoxy. In this study, the epoxy composite coatings which exhibited electroactive properties have good anticorrosion for CRS substrate. Solvent-free system can effectively reduce environmental pollution and cost savings. The anticorrosion ability, redox properties and curing time of epoxy can significantly enhance while the ACAT content was increased in epoxy resin.