研究生: |
劉忠明 Chung-ming Liu |
---|---|
論文名稱: |
奈米氧化鋅之製備、鑑定與其分散性研究 Synthesis and Characterization of Zinc Oxide Nanoparticles and Their Dispersibility in Different Media |
指導教授: |
陳崇賢
Chorng-shyan Chern |
口試委員: |
許榮木
Jung-mu Shu 林析右 Shi-yow Ling |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 化學工程系 Department of Chemical Engineering |
論文出版年: | 2006 |
畢業學年度: | 94 |
語文別: | 中文 |
論文頁數: | 109 |
中文關鍵詞: | 奈米氧化鋅 、分散性 |
外文關鍵詞: | ZnO nanoparticles, dispersion |
相關次數: | 點閱:223 下載:2 |
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本實驗以工研院所提供之奈米氧化鋅為實驗基材,將矽烷偶合劑接枝於氧化鋅表面以改變其表面親疏水性質,再分散於水或異丙醇中,並以物理法(超音波震盪)或化學法(分散劑)嘗試將分散液中的粒子均勻分散。以FTIR分析矽烷偶合劑接枝於氧化鋅表面之官能基,再利用TEM分析分散液中棒狀氧化鋅之尺寸,並計算分散液的底部沈澱量以研究奈米氧化鋅粒子在連續相的安定性。
本研究並以sol-gel法製備氧化鋅/乙二醇的透明分散液,並將分散液中的副產物氯化鈉以乙醇溶解,純化後之氧化鋅再分散於水或乙二醇中,並加入適當的分散劑,探討以sol-gel法製備之氧化鋅直接分散於溶劑中之安定性。將純化後之奈米氧化鋅以X光繞射分析結晶晶相並計算單晶大小,再以SEM觀察奈米氧化鋅的結晶型態,最後將分散液進行TEM之觀察並計算於分散液中之奈米氧化鋅粒子的粒徑。
Abstract
ZnO nanoparticles provided by Material and Chemical Research Laboratory, Industrial Technology Research Institute was modified by alkoxysilane to change the hydrophilic/hydrophobic characteristics of ZnO particles and these ZnO particles were dispersed in H2O or IPA with the aid of ultrasonication and dispersant. The grafting of organic groups on ZnO particle surface was confirmed by FTIR. The particle size of the ZnO dispersion was analyzed by TEM. The sediment was collected and analyzed to study the dispersibility of ZnO particles in different media.
The sol-gel method was then used to synthesize ZnO/EG translucent colloid. By-product NaCl of dispersion was removed with alcohol and the purified ZnO was redispersed in H2O or EG with dispersant. The dispersibility of ZnO nanoparticles in different media was investigated. The crystallization of ZnO nanoparticles was analyzed by WXRS and the crystal size calculated by Sherrer equation. The morphology of ZnO nanoparticles was observed by SEM and TEM.
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