研究生: |
張家瑝 Chang, Jia-Huang |
---|---|
論文名稱: |
懸浮液對擴大淋幕式塗佈視窗機制之探討 |
指導教授: | 劉大佼 |
口試委員: |
吳平耀
朱文彬 |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 化學工程學系 Department of Chemical Engineering |
論文出版年: | 2012 |
畢業學年度: | 100 |
語文別: | 中文 |
論文頁數: | 84 |
中文關鍵詞: | 淋幕式塗佈 、無機粒子 |
相關次數: | 點閱:1 下載:0 |
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本研究針對粒子對擴大淋幕式塗佈視窗之機制進行探討。實驗塗液系統是分別將不同粒徑的聚甲基丙烯酸甲酯(PMMA)粒子、二氧化矽(SiO2)與親水性及疏水性的二氧化鈦(TiO2)加入在甘油水溶液內,使其形成分散良好的懸浮液,再進行塗佈實驗。結果顯示除了疏水性粒子外,添加粒子均能減緩空氣滲入發生,提升最大塗佈速度。對此現象我們提出了一個理論來說明,即親水性粒子在水含量較少的溶液中,會容易往液氣介面的部分脫離,擠壓滲入的空氣層,穩定其動態濕潤線來延後缺陷發生,而達到提高最大塗佈速度的效果。經由分光光譜儀的檢測,發現在溶液的液泡中,粒子濃度皆比溶液中來的高,與理論預測相同,表示粒子具有往表面移動的的行為。在雙層淋幕式塗佈系統中,發現添加粒子在攜帶層塗液可提升最大塗佈速度,而添加於上層塗液中並無效果。
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