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博碩士論文 etd-0511114-163117 詳細資訊
Title page for etd-0511114-163117
論文名稱
Title
微結構疏水性表面製作與表面特性之研究
The Study and Fabrication of Surface Properties on the Hydrophobic Microstructures Surface
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
70
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2014-06-09
繳交日期
Date of Submission
2014-06-22
關鍵字
Keywords
微結構、接觸角、翻模轉印法、蓮葉效應、疏水性、聚二甲基矽氧烷
Lotus effect, hydrophobic, PDMS, Replica Molding Method, contact angle, microstructures
統計
Statistics
本論文已被瀏覽 5717 次,被下載 4016
The thesis/dissertation has been browsed 5717 times, has been downloaded 4016 times.
中文摘要
聚二甲基矽氧烷(Polydimethylsiloxane, PDMS)具有良好的可塑性、撓曲性以及高透光度,並有低表面自由能的特性,為一疏水性材料。本研究為利用PDMS的高可塑性,使用翻模轉印法來複製疏水性植物葉面的結構。當PDMS表面擁有像疏水性植物葉面般的微結構物時,將使此PDMS表面更具疏水性,且製作過程簡單方便。
研究發現葉面的一次翻模與二次翻模的接觸角都比平整表面的PDMS還要大。我們將搭配Cassie-Baxter疏水模型的公式,計算PDMS表面粗糙化之後,其固體-液體接觸面積是否與式子相同,探討表面結構與疏水性的關係。蓮葉與水稻葉面的結構複製到PDMS表面上與原始葉面接觸角最為相近,代表其結構轉移至PDMS表面上,仍具有相同疏水特性。另外再將表面進行氧氣電漿處理,會使PDMS變為親水性,探討親水性表面結構的接觸角變化。
Abstract
Polydimethylsiloxane (PDMS) is a hydrophobic material which has good plasticity, flexibility and a high transmittance and low surface free energy. In this study, we use PDMS with high plasticity to copy the hydrophobic structure of plant leaves by Replica Molding Method. When the PDMS surface has microstructures of hydrophobic plant leaves, the PDMS surface will be more hydrophobic and the production process is simple and convenient.
The study found that the contact angle of PDMS surface with microstructures of hydrophobic plant leaves by once and twice Replica Molding Method is bigger than the PDMS with flat surface. We discuss the relationship between the surface structure and hydrophobic by hydrophobic model with Cassie-Baxter equation. The contact angle of PDMS surface with microstructures of rice and lotus leaves is similar to the rice and lotus leaves. It is proof that this kind of microstructures is transferred to the surface of the PDMS, and it still has the same hydrophobic properties. In addition, the surface is treated by oxygen plasma, and the PDMS becomes hydrophilic. Then we discuss the relationship between the surface structure and hydrophilic.
目次 Table of Contents
摘要--------------------------------------------------------------------i
Abstract---------------------------------------------------------------ii
致謝-------------------------------------------------------------------iii
目錄-------------------------------------------------------------------iv
圖目錄----------------------------------------------------------------vi
表目錄----------------------------------------------------------------ix
第一章 緒論----------------------------------------------------------1
第二章 基本理論簡介----------------------------------------------3
2-1 表面張力------------------------------------------------------3
2-2 接觸角---------------------------------------------------------4
2-3動態接觸角----------------------------------------------------5
2-4表面自由能----------------------------------------------------6
2-5 疏水模型理論 -----------------------------------------------7
2-5-1 Wenzel疏水模型---------------------------------------7
2-5-2 Cassie-Baxter疏水模型------------------------------8
2-5-3 萊頓弗羅斯特現象(Leidenfrost effect)-----------11
2-6 蓮葉效應(Lotus effect)-------------------------------12
2-7電漿表面改質原理------------------------------------------13
第三章 實驗材料與儀器------------------------------------------14
3-1 聚二甲基矽氧烷--------------------------------------------14
3-2 翻模轉印法(Replica Molding Method)----------------16
3-3 接觸角量測儀(Contact Angle Measuring System)-18
3-4電漿清洗機(Plasma Cleaner)----------------------------19
3-5光學顯微鏡(Optical Microscope)------------------------20
3-6超音波清洗機(Ultrasonic Cleaner)----------------------21
第四章 疏水性植物葉面結構觀察------------------------------22
4-1蓮葉葉面結構(學名:Nelumbo nucifera)----------22
4-2芋葉葉面結構(學名:Colocasia esculenta)-------24
4-3水稻葉面結構(學名:Oryza sativa)-----------------25
4-4水芙蓉葉面結構(學名:Pistia stratiotes)----------27
4-5槐葉萍葉面結構(學名:Salvinia natans)----------28
4-6豌豆葉面結構(學名:Pisum sativum)--------------30
4-7 綜合整理葉面接觸角圖表 ---------------------------------31
第五章 疏水性植物葉面翻模與結構探討---------------------32
5-1葉面翻模結構觀察-------------------------------------------33
5-1-1 蓮葉翻模--------------------------------------------------33
5-1-2 芋葉翻模--------------------------------------------------35
5-1-3 水稻葉面翻模--------------------------------------------37
5-1-4 水芙蓉葉面翻模-----------------------------------------38
5-1-5 槐葉萍葉面翻模-----------------------------------------40
5-1-6 豌豆葉面翻模--------------------------------------------41
5-2 葉面翻模接觸角量測---------------------------------------42
5-2-1葉片一次翻模接觸角量測------------------------------42
5-2-2葉片二次翻模接觸角量測------------------------------44
5-2-3 接觸角比較與討論--------------------------------------46
5-3 氧氣電漿處理後接觸角比較與討論---------------------50
第六章 結論與未來工作------------------------------------------55
6-1 總結------------------------------------------------------------55
6-2 未來工作------------------------------------------------------56
參考文獻-------------------------------------------------------------57
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