研究生: |
許志霖 Chih-Lin Hsu |
---|---|
論文名稱: |
金屬與非金屬材料表面疏水塗裝製程摸擬及分析 Process Simulation and Analysis to Hydrophobic Coating on Metallic/Non-metallic Material Surface |
指導教授: |
周賢鎧
Shyan-kay Jou |
口試委員: |
顏怡文
Yee-Wen Yen 胡毅 Yi Hu |
學位類別: |
碩士 Master |
系所名稱: |
應用科技學院 - 醫學工程研究所 Graduate Institute of Biomedical Engineering |
論文出版年: | 2010 |
畢業學年度: | 98 |
語文別: | 中文 |
論文頁數: | 148 |
中文關鍵詞: | 蓮花效應 、超疏水表面 、金屬與非金屬材料疏水製程. |
外文關鍵詞: | Lotus effect, Super-hydrophobic surface, Hydrophobic coating process of metallic or non-m |
相關次數: | 點閱:244 下載:2 |
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本研究中選用金屬類材料Al、GL、TiZn-P、SUS304、SUS304CF與非金屬類材料PVDF、Glass、Si wafer合計8種樣品,將添加不同比例的TS-720疏水性二氧化矽奈米粉末之ITRI疏水劑,使用與目前產業相似的簡易刮塗法將此液態疏水混合液塗佈於樣品表面,並在130oC的烘箱內乾燥5分鐘後即完成樣品的製備。ITRI疏水劑含TS-720奈米粉末的含量在2.5 wt%時,各樣品皆能達到將近140o的接觸角,SEM可清楚觀察到材料表面有奈米級的多孔結構,AFM的剖面圖也可看到TS-720奈米粉末在表面所造成的起伏。由文獻可知,除了表面材質本身應有高疏水性,表面微奈米結構型式應是達成高接觸角的重要關鍵之一。ITRI疏水劑與低於2.5 wt% TS-720奈米粉末的疏水配方塗裝的樣品,經過UV加速耐候450小時的測試,表面的接觸角與視覺外觀並未有明顯變化。
當TS-720奈米粉末與ITRI疏水劑的混合比例達到5.0 wt%以上時,觀察到疏水塗膜有明顯剝落的狀況且疏水性也下降,可能與樣品表面之黏著性能處理有關。PVDF漆料混合10 wt%以上的TS-720奈米粉末也有疏水提升的效果,但是20與30 wt%的混合比例時,也有相同疏水塗膜剝落現象。
Aluminum, Galvalumed steel, TiZn-P, SUS304, SUS304CF, PVDF, glass, and Si wafer are chosen in this work for the study of hydrophobic coating to metallic/non-metallic substrates. Various amount of TS-720 hydrophobic nano-particles were mixed into ITRI hydrophobic agent, and this liquid mixture is applied onto different material surfaces by a coating bar. High CA near 140o are achieved in all samples with 2.5 wt% TS-720 in ITRI H.A. mixture, and SEM images show that nano-porous surface composed of TS-720 nano-particle covers the surface of substrates. Profiles of AFM images also reveal the surface fluctuation caused by TS-720 nano-particle. From the previous study, we know that keys to super-hydrophobic surface are not only the high hydrophobic property of material but also the surface structure and roughness. No significant change in visual appearance and hydrophobicity are noticed after 450 hour exposure of UV weathering test for those coated samples.
When the content of TS-720 nano-particle in ITRI H.A. is higher than 5.0 wt%, the hydrophobic coating peels off obviously and brings degradation of hydrophobicity. This phenomena may cause by poor adhesion from the surface pretreatment of the substrate. PVDF paint with 10 wt% TS-720 nano-particle also shows higher hydrophobicity than ordinary one, however, same de-attachment from hydrophobic film also found from sample coated with 20 or 30 wt% TS-720 in ITRI solution.
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