臺灣博碩士論文加值系統

本研究分為兩個部份，第一部分是探討玻璃纖維上沉積超疏水性溶膠/聚四氟乙烯之最佳方法，期許疏水角度達150˚以上，之後再測試其耐水衝擊性，實驗結果顯示，最佳鍍膜方法為刮刀法，當刮刀層數增加時，表面覆蓋率上升，且溶膠也較均勻分佈，以刮刀法兩層以上，可得到高接觸角153˚，而耐水衝擊測試後，接觸角下降比例約為7%，最佳熱處理溫度為200℃、2小時，FTIR分析結果顯示，當熱處理溫度300℃時，疏水鍵會因熱裂解而減少。第二部分研究溶膠時效不同天數對拉伸強度之變化，及以刮刀法塗佈完後做作耐候測試，實驗結果顯示，時效的天數會影響溶膠縮合的程度及粒徑大小，溶膠時效11天，得到最高拉伸強度294kg，而耐候測試300小時後，拉伸強度雖都有略微下降，但其拉伸強度仍比玻璃纖維只沉積聚四氟乙烯還要好，耐候測試後，接觸角都低於超疏水定義150˚，但遲滯角都低於10 ˚以內，證明表面仍具有超疏水性。

This study was divided into two parts. The first part was to investigate the optimized method of depositing superhydrophobic sol gel/PTFE on glass fiber. The object was to realize water contact angle (WCA) of more than 150o. Endurance of water impact was tested. The best method was blade coating. With increasing of layers of blade coating, the covering ratio of superhydrophobic sol gel/PTFE increased, and the sol gel was more uniform. With two or three layers of blade coating, WCA of 153o was realized, and WCA decreased ~7 % after water impact. The optimized heat treatment was 200 oC 2 hrs. The analysis of FTIR showed that the number of hydrophobic bonds decreased due to pyrolysis at heat treatment of 300 oC. The second was to study the variation of tensile strength with aging of sol gel and weathering tests were performed. The degree of condensation and the particle size were influenced by aging. The highest tensile strength was obtained at aging of 11 days. Although tensile strength of glass fiber with deposition of superhydrophobic sol gel/PTFE was decreased after weathering test of 300 hrs, it was still higher than that of glass fiber with deposition of only PTFE. WCAs were all smaller than 150o after weathering test. But water contact angle hysteresis was smaller than 10o. This result indicated that the property of superhydrophobicity of glass fiber with deposition of superhydrophobic sol gel/PTFE was maintained after weathering test.

中文摘要 i
Abstract ii
致謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章 緒論 1
1-1前言 1
第二章 文獻回顧 3
2-1 PTFE材料簡介 3
2-1-1 PTFE特性 4
2-1-2 PTFE乳液特性 4
2-3超疏水現象推算數學模式及理論 9
2-3-1楊氏方程 9
2-3-2 Wenzel’s Theory 10
2-4、超疏水表面製備方法 12
2-4-1 電漿法 12
2-4-2 微影技術 13
2-4-3 壓印法 14
2-4-4化學氣相沈積法 15
2-4-5電化學法 16
2-5溶膠-凝膠法簡介 16
2-5-1 溶膠-凝膠法 17
2-5-2溶膠-凝膠製備 18
第三章實驗步驟與實驗設備 20
3-1實驗藥品 20
3-2 實驗儀器 21
3-3實驗流程 22
第四章結果與討論 27
4-1 溶膠之超疏水性 27
4-2 溶膠塗佈於帆布上 28
4-3 PTFE與溶膠混合 29
4-4 浸塗法 34
4-5 刮刀法 41
4-6 FTIR分析 47
4-7 SEM分析 49
4-8拉伸測試 55
4-9 耐候儀測試 57
第五章 結論 62
參考文獻 64

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