- 學位論文
雙硬化型環氧甲基丙烯酸酯複合材料之製備與抗腐蝕性質測試
Preparation of dual-curable epoxymethacrylate composites and their anti-corrosion properties
摘要
本研究合成出雙硬化型環氧甲基丙烯酸酯(EMA)，並加入氧化石墨烯(GO)或經乙二醇還原之還原石墨烯(rGO)，製備出EMA/GO、EMA/rGO複合薄膜，期望提高抗腐蝕能力。研究因此分為三個部分，第一部分是將雙酚A型環氧樹脂(DGEBA)與甲基丙烯酸(MAA)利用開環酯化的方式製備出末端分別帶有環氧基及雙鍵的雙硬化型環氧甲基丙烯酸酯(EMA)，利用FTIR以及NMR進行結構鑑定，並分別計算出環氧基轉化率為55.7%以及51.5%。第二部分是以Hummer 法合成出氧化石墨烯，再利用乙二醇還原製備出還原石墨烯(rGO)，以SEM、TEM、FTIR以及Raman進行型態及結構鑑定，利用XRD進行結晶度測試，以及TGA測試含氧官能基團含量。第三部分是將不同含量的填料(GO、rGO)添加至EMA中，製備出雙硬化型環氧甲基丙烯酸酯複合材料(EMA/GO、EMA/rGO)，利用TGA及DSC探討熱性質，之後以旋轉塗佈的方式將複合材料塗佈在冷軋不銹鋼(CRS)上，進行抗腐蝕性質、接觸角以及硬度測試。從實驗結果可得知，EMA本身就具有良好的抗腐蝕性質，其防腐蝕效率(C.P.E.)高達98.5%，而在EMA/GO系統中，可發現添加GO更進一步提升材料之抗腐蝕能力，腐蝕電位進一步上升；至於EMA/rGO系統中，腐蝕電流則是大幅下降，推測是因為rGO延長氧氣接觸鋼片的路徑，造成腐蝕電流下降，添加到2phr時，C.P.E.上升到99.4%，因此可知道EMA/GO以及EMA/rGO系統皆可提升抗腐蝕能力。
並列摘要
In this study, we successfully synthesized the dual-curable epoxymethacrylate (EMA) containing epoxide group and double dond from the reaction of diglycidyl ether of bisphenol-A (DGEBA) and methacrylic acid (MAA). The structure of EMA was investigated by FTIR and NMR. The epoxy conversion rate was 55.7% and 51.5% that calculated by FTIR and NMR. Besides, graphene oxide (GO) was prepared by Hummers’ method. Then we utilized ethylene glycol (EG) to reduce GO (rGO) selectively. SEM, TEM, FTIR, XRD and TGA were employed to characterize the morphology, chemical and structural changes the GO and rGO. Finally, EMA composites were prepared at different weight contents of fillers (GO or rGO). The results showed that composites containing GO or rGO promoted hydrophobicity. And we invented the corrosion potential increased with GO content. In the EMA/rGO composites system, the corrosion protection efficiency (C.P.E.) increased from 97.6% to 99.2%. Therefore, EMA/GO and EMA/rGO composites could improve the corrosion resistance.