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研究生:鄭詔宇
研究生(外文):Chao-Yu Cheng
論文名稱:油酸改質奈米氧化銅粉體在疏水性溶劑中的分散
論文名稱(外文):Dispersion of oleate-modified CuO nano-particles in non-polar solvent
指導教授:簡朝和
指導教授(外文):J. H. Jean
學位類別:碩士
校院名稱:國立清華大學
系所名稱:材料科學工程學系
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:35
中文關鍵詞:奈米粉體分散有機懸浮液氧化銅
外文關鍵詞:nano-powdersdispersionorganic suspensioncupric oxide
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本研究主要探討兩種合成方法的奈米氧化銅粉體;氣相合成CuO-V以及液相析出CuO-P,經由油酸化學改質後在表面形成Cupric oleate錯化物,增強奈米氧化銅-正辛烷懸浮液的分散穩定性。實驗中經由黏度儀的量測比較兩種氧化銅粉體在正辛烷中的分散行為,並且藉由穿透式電子顯微鏡的觀察確認粉體表面油酸層吸附情形,最後利用紅外線光譜儀以及高解析電子能譜儀分析表面特性和化學鍵結。結果顯示CuO-P粉體表面帶有大量的氫氧基提供了與油酸根的反應位置,在表面形成較多的Cupric oleate化學鍵結,因此CuO-P有機懸浮液的分散穩定性遠優於CuO-V。此外,本研究亦根據DLVO理論,計算改質後氧化銅膠體粒子在整個有機分散系統的位能曲線。
Two nano-sized cupric oxide powders, which are synthesized by vapor-phase reaction and aqueous precipitation, are surface-modified with unsaturated oleic acid to form cupric oleate on the surface. This enhances the dispersibility of cupric oxide powders in a non-polar solvent of octane. The cupric oxide powder prepared by aqueous precipitation exhibits much better dispersion in octane than that synthesized by vapor-phase reaction. This is attributed to the presence of larger amounts of hydroxyl groups on the particle surface, forming more cupric oleate and thus enhancing the colloidal stability of the resulting suspension.
摘要-I 目錄-II
表目錄-IV
圖目錄-V
1.前言-1
2.實驗流程-4
2.1 材料-4
2.2 粉體粒徑以及表面積量測-5
2.3 懸浮液的配置-5
2.4 流變實驗-6
2.5 HR-TEM觀察以及FT-IR、HR-XPS表面分析-6
3.結果-8
3.1 化學表面改質方法-8
3.2 FT-IR表面分析-9
3.3 HR-TEM觀察-10
3.4 有機酸的影響-11
3.5 溶劑的影響-11
4.討論-13
4.1溶度積常數與溶解因子的影響-13
4.2 XPS表面分析-14
4.3 膠體間交互作用力-15
5.結論-19
6.參考文獻-20
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