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研究生:林育正
研究生(外文):Yu-Jheng Lin
論文名稱:鋁材磷酸氧化膜上製作超疏水膜
論文名稱(外文):The Preparation of Superhydrophobic Film on Phosphoric acid Anodic Film on Aluminum
指導教授:施幸祥
指導教授(外文):Hsing-Hsiang Shih
口試委員:施幸祥
口試委員(外文):Hsing-Hsiang Shih
口試日期:2013-07-31
學位類別:碩士
校院名稱:大同大學
系所名稱:化學工程學系(所)
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2013
畢業學年度:101
語文別:中文
論文頁數:101
中文關鍵詞:蝕刻磷酸十四酸超疏水
外文關鍵詞:myristic acidphosphoric acidetchsuperhydrophobic
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本研究是藉由模仿蓮花表面上的分層結構製備超疏水鋁膜,實驗中於鋁材上蝕刻製作微米級的粗糙結構,再用磷酸陽極處理在其上製備微奈米級表面,最後浸入十四酸溶液中製備超疏水膜,分析磷酸陽極處理的電流大小、時間、膜厚、粗糙度及硬度與超疏水角度之間關係,實驗中發現膜厚與粗糙度有相對的關係,但是對於疏水的影響程度不大,而硬度則是隨著膜厚的上升而跟著上升。以往的陽極處理膜之耐腐蝕性總是與膜厚以及硬度有相關性,但當加入了疏水度的因素後,耐腐蝕性的好壞反而會由疏水程度決定,例:本研究中最硬(327.4 HV)最厚(4.7μm )的膜其疏水角只有140°、接觸面積為(26%)、腐蝕電流為-7.54x10-6(A) ,而最高的疏水度為154°卻發生在膜厚(2.9μm) 、硬度(247.2 HV)時,其腐蝕電流為 -9.11x10-8(A),其藉由試片與液面的接觸面積僅14%,來減少與腐蝕物質與試片接觸的機會,以提升試片的耐腐蝕性,並藉由SEM圖來觀察試片表面形貌,發現好的疏水度平面呈現梯田狀,但當有較為平坦的表面出現時,其疏水度就會下降。
In this research , the preparation of superhydrophobic aluminum film is carried out by simulating the multilayer structure of the lotus surface . Aluminum material is first etched to produce rough structure of micrometer degree , then the anodic treatment by means of phosphoric acid is carried out to prepare the surface structure of micro-nanometer degree ; finally , the superhydrophobic film is prepared by immersing the specimen into the myristic acid. It is found that there is relatively certain relationship between roughness and thickness : however , the relationship with the degree of the hydrophobic effect is not obvious , whenever , the hardness increase with the film thickness . Formerly , the anti-corrosive property of the anodic film is always related between the thickness and between the hardness ; however , after the addition of hydrophobic effect , the anti-corrosive property depends conversely upon the hydrophobic degree . For example , the hardest (327.4Hv) and thickest (4.7?慆) film has a hydrophobic angle of only 140° , a contact area of 26% , and a corrosion current of 7.54E-0.6(A) . However , the highest hydrophobic degree of 154° occurs when the the hardness is 247.2 Hv and film thickness is 2.9?慆 , the contact area between the liquid and specimen surface is only 14% such that the contact chance between the corrosive material and specimen is decreased so as to enhance the anti-corrosive property of the specimen . In addition , by observing the morphology of the specimen by means of SEM , it is discovered that the good hydrophobic surface shows the shape of step field , but when the surface is relatively smooth , the hydrophobic angle drops .
目錄
致謝i
中文摘要ii
英文摘要iii
表目錄ix
圖目錄x
第一章 緒論1
1.前言1
研究目標3
第二章 理論基礎4
2.1超疏水4
2.1.1超疏水表面理論4
2.1.2 仿生學4
2.1.3 楊氏方程式(Young’s Equation)5
2.1.4 WENZEL和CASSIE THEORY7
2.1.5濕潤性(WETTING)9
2.1.6 遲滯角(HYSTERESIS)10
2.1.7 濕潤接觸面積(WETTING AREA)11
2.1.8表面自由能(SURFACE FREE ENERGY)12
2.2 鋁材的前處理14
2.2.1鹼洗14
2.2.2酸洗14
2.2.3去離子水與超音波震盪清洗15
2.3 鋁蝕刻15
2.3.1鋁蝕刻原理15
2.3.2蝕刻液15
2.3.3鋁蝕刻應用16
2.4 鋁的陽極氧化16
2.4.1 陽極氧化膜的結構18
2.4.2陽極氧化的反應機制22
2.4.3陽極氧化鋁形成之化學反應24
2.4.4 陽極處理溶液26
2.5自組裝28
2.5.1分子自組裝的原理及特點28
2.5.1自組裝單層膜(Self-Assembled Monolayers, SAMs)30
2.5.3自組裝單層膜(SAMs)的成膜機制31
2.6 表面粗糙度32
2.7 腐蝕試驗36
第三章 實驗39
3.1 材料及樣品製備39
3.2實驗裝置及儀器41
3.3 實驗程序42
3.3.1前處理43
3.3.2化學蝕刻44
3.3.3陽極氧化44
3.3.4單分子自組裝44
3.4 量測45
3.4.1 膜厚45
3.4.2 表面粗糙度46
3.4.3 角接觸角測量46
3.4.4 場發射掃描式電子顯微鏡FE-SEM46
3.4.5 膜硬度47
3.4.6 腐蝕試驗48
第四章 結果與討論49
4.1 膜厚49
4.2 表面粗糙度50
4.3 接觸角51
4.4 濕潤面積51
4.5 硬度52
4.6 SEM52
4.7 腐蝕電流53
第五章 結論78
參考文獻78
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