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研究生：	徐國庭
論文名稱：	陰離子型分散劑的合成及對鈦酸鋇漿體分散性質的影響
指導教授：	許貫中
學位類別：	碩士 Master
系所名稱：	化學系 Department of Chemistry
論文出版年：	2007
畢業學年度：	95
語文別：	中文
論文頁數：	80
中文關鍵詞：	鈦酸鋇、合成分散、鋇離子溶出、共聚物
論文種類：	學術論文
相關次數：	點閱：158 下載：0
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在鈦酸鋇電子陶瓷的製程，要得到穩定性高且分散良好的漿料必須添加分散劑。本篇論文主要是合成陰離子型共聚物聚丙烯醯胺-co-3-18烷基-聚乙二醇-羰基丙烯酸，Poly (acrylamide-co-3-octadecoxy poly (ethylene glycol) carbonyl acrylic acid) (POPCA)，探討共聚物中分子量 (Mw) 對於鈦酸鋇水系漿體分散性質的影響。
合成之POPCA以1H-NMR及IR光譜確認其結構，並利用GPC測定其分子量，使用電位滴定儀測量其單體比例及解離率。添加POPCA對於鈦酸鋇漿體穩定性的影響，主要研究方法有流變行為、沈降體積及粒徑分佈，並利用界達電位及吸附量等實驗來解釋；另外以ICP-MS來測量鈦酸鋇漿體Ba2+的溶出量。實驗結果發現隨著添加共聚物的分子量的下降，鈦酸鋇漿體有較佳的穩定性，胚體有較高的胚體密度。POPCA (14) (1.4×104)有最佳的分散效果，原因是吸附此聚合物的BT粒子有最大的負界達電位。最後添加POPCA能減少漿體中鋇離子的溶出。

第一章 緒論..............................................................................................1
1-1 前言.....................................................................................................1
1-2 研究目的.............................................................................................1
第二章 文獻回顧......................................................................................2
2-1 分散原理.............................................................................................2
2-1-1 粒子的特性.....................................................................................2
2-1-2 膠體粒子表面間的作用力.............................................................2
2-1-3 分散機構.........................................................................................5
2-2 吸附原理.............................................................................................5
2-3 鈦酸鋇粉末.........................................................................................7
2-3-1 鈦酸鋇粉末之簡介.........................................................................7
2-3-2 鈦酸鋇粉末之相圖及結構.............................................................7
2-4 粉體分散糸統穩定性分析之文獻探討.............................................8
2-5 分散效果的評估方法.......................................................................10
2-5-1 分散劑的添加...............................................................................10
2-5-2 分散系統的流變性質.................................................................. 10
2-5-3 吸附行為........................................................................................11
2-5-4 沉降實驗........................................................................................11
2-5-5 粒徑大小.......................................................................................12
2-5-6 界達電位.......................................................................................12
2-6-7 鋇離子溶出...................................................................................13
2-5-8 介電性質.......................................................................................14
第三章  聚合物之合成與實驗流程......................................................21
3-1 實驗流程...........................................................................................21
3-2 實驗方法.. ........................................................................................21
3-2-1 陰離子型聚合物POPCA之合成..................................................21
3-2-2 聚合物之結構鑑定及性質分析...................................................21
3-2-3 聚合物對BT漿體之分散效果分析.............................................22
3-3 實驗材料與實驗設備.......................................................................22
3-3-1鈦酸鋇 (BT) 粉末.........................................................................22
3-3-2藥品.................................................................................................22
3-3-3實驗設備.........................................................................................23
3-4 聚合物之合成...................................................................................24
3-5 BT粉末晶相分析..............................................................................25
3-6 高分子結構鑑定及性質分析...........................................................26
3-6-1核磁共振 (1H-NMR) 光譜分析...................................................26
3-6-2 紅外線 (IR) 光譜分析.................................................................26
3-6-3聚合單體比例分析.........................................................................26
3-6-4 凝膠滲透層析 (GPC) 分析.........................................................26
3-6-5 聚合物固含量測量.......................................................................27
3-6-6 聚合物解離率的量測...................................................................27
3-7 聚合物對鈦酸鋇漿體之分散性質分析...........................................27
3-7-1 鈦酸鋇 (BT) 漿體的配製............................................................27
3-7-2 流變性質量測...............................................................................28
3-7-3 吸附量的量測...............................................................................28
3-7-4 沈降體積量測...............................................................................29
3-7-5 粒徑分佈量測...............................................................................29
3-7-6 界達電位量測...............................................................................29
3-7-7胚體密度........................................................................................29
3-7-7.1 生胚密度....................................................................................29
3-7-7.2 燒結密度....................................................................................30
3-7-8鋇離子溶出量.................................................................................31
3-7-9介電常數與介電損失.....................................................................31
3-7-10微結構分析...................................................................................32
第四章 聚合物之性質分析....................................................................36
4-1 聚合物之結構分析...........................................................................36
4-2 聚合物單體比例...............................................................................36
4-3 聚合物之分子量...............................................................................37
4-4聚合物在不同pH值之解離率..........................................................37
第五章 漿體分散之性質分析................................................................44
5-1 聚合物分子量對BT漿體黏度的影響.............................................44
5-2 聚合物對BT粒子吸附行為的影響.................................................45
5-3 聚合物對BT漿體粒徑分佈的影響.................................................47
5-4 聚合物對BT漿體沉降體的影響.....................................................48
5-5 聚合物對鈦散鋇漿體界達電位的影響...........................................49
5-6 聚合物對BT胚體密度的影響.........................................................50
5-7 聚合物對鈦散鋇漿體鋇離子溶出的影響.......................................51
5-8 聚合物對BT胚體之介電性質的影響.............................................52
5-9 聚合物對BT微結構的影響.............................................................53
第六章 結論............................................................................................78
參考資料..................................................................................................80
                                

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