- 學位論文
捲對捲滾輪壓印應用於金屬抗腐蝕之研究
A study of roll to roll imprinting applied to corrosion protection of metal
摘要
為了提升金屬的抗腐蝕能力，許多方法已被提出，其中以塗佈隔離層的方法最受青睞，其在金屬表面的塗層主要目的是為了降低金屬與腐蝕介質的接觸，進而增加金屬的抗腐蝕能力，而本研究係以滾輪壓印的方式將微結構轉印至鋼捲表面，使其表面具有疏水性的效果，進而提升抗腐蝕的能力。 首先利用本研究團隊自行開發的紫外光輔助捲對捲滾輪壓印設備，並以傳統的光學微影、膠體微影與乾蝕刻製程製作出具微米結構與微/奈米層級結構矽模仁，而後利用模板複製的方法做出與矽模仁結構相反的PDMS軟性壓印模仁，並以紫外光固化型高分子材料做為成形材料而後進行滾輪壓印製程，將壓印模仁的結構轉印至鋼捲表面。在檢測方面，先利用接觸角量測儀來量測滾壓成品的表面親疏水性，結果顯示表面具微結構的高分子塗層其表面接觸角均大於表面無結構者，而表面具微/奈米層級結構者其表面接觸角為131°，具有較佳的疏水性能；最後利用電化學檢測來測量滾壓成品的抗腐蝕性能，裸鋼捲其電化學檢測之腐蝕電位為-913.0 mV，而具微/奈米層級結構的樹脂塗層具有最佳的腐蝕電位-515.7 mV。其結果亦證明，高分子塗層能有效的提升鋼捲的抗腐蝕能力，而表面越是疏水的高分子塗層其抗腐蝕能力則越好。
並列摘要
In order to enhance the corrosion resistance of metals, many methods have been proposed, in which the insulation layer coating on the surface of metal is the most popular method to isolate the metal from corrosive media contact. In this study, roll to roll (R2R) equipment was used to imprint the micro/nano structure on the surface of metal to lead to hydrophobic effect on the surface, and thereby enhancing the ability of corrosion. The conventional optical lithography, colloidal lithography and dry etching process were employed to fabricate silicon molds with micro/nano structure, Polydimethylsiloxane (PDMS) soft molds were duplicated from the silicon mode as a embossed template. UV-assisted R2R imprinting method was introduced to transfer the structure from soft mold to the surface of cold-rolled steel. Contact angles were measured to define the hydrophobicity of the surface with/without imprinting structures. The results showed that contact angle of the surface with micro/nano hierarchical structure is 131° which is higher than the angles with micro structure and without imprinting structure. The electrochemical experimental methods was used to characterize the corrosion properties. The ccorrosion potential of steels without any protection and with micro/nano hierarchical are -913.0 mV and -515.7, respectively. The results show that the polymer coating with hydrophobicity effect can effectively improve the corrosion resistance.