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研究生:余穎
研究生(外文):Yiing Ee
論文名稱:旋光性物質/向列型液晶複合系的調光閥效應研究
論文名稱(外文):Light Modulated Effects in the Chiral Compound/Nematic Liquid Crystal
指導教授:黃振球黃振球引用關係
指導教授(外文):Jenn Chiu Hwang
學位類別:碩士
校院名稱:元智大學
系所名稱:化學工程研究所
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2001
畢業學年度:89
語文別:中文
論文頁數:99
中文關鍵詞:調光閥旋光性物質向列型液晶
外文關鍵詞:Light ModulatedChiralNematicLiquid Crystal
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利用Nematic低分子液晶與旋光性物質混合形成複合系液晶。研究此複合性液晶的光電效應及其相行為。
經由實驗發現複合系液晶在低比例時可誘導出Cholesteric相、Blue Phase、Smectic相。在高比例時誘導出Smectic相。本實驗在低比例時利用溫度變化達成光散亂及光透明,使液晶面板呈現明暗比。並利用應加電場改變分子排列形成雙安定效應。複合系液晶在Blue Phase時、在電場下形成電致變色效應、且具有安定性。利用可利用溫度快速變化調節液晶的透光度及電場切換所形成的透光度變化達到調光閥的功能
在7OCB/S811/R811混合系中,在Cholesteric相時,在電場下產生電場變色效應。隨著電場增加而呈現不同顏色的變化。

The phase behavior and electro-optic properties of the mixture of chiral compound and nematic liquid crystal were studied. With low concentration of chiral compound, the cholesteric Phase,Blue Phase and Smectic Phase were induced. With large percent of chiral compound, we observed the only one phase-smectic phase.Without the electric field, the scattering and transparent states were achieved by thermal transition, and resulted in different contrasts of the liquid crystal panel with different temperatures.
Furthermore, it can also be achieved by bistable effect and electric switch.

書頁名…………………………………………………………I
推薦函………………………………………………………..II
論文口試委員審定書……………………………………... III
授權書…………………………………………………….....IV
中文摘要…………………………………..………….……VII
英文摘要…………………………………………………..VIII
目錄………………………………………………………….IX
表目錄………………………………………………….…..XII
圖目錄……………………………………………….…...XVII
第一章 緒論………….………………………………………1
1-1 液晶的發現………………………………...…………1
1-2 液晶的分類…………………………………...………3
1-2-1液晶形成方式………………………………….3
1-2-2液晶的分子排列狀態…………………………3
1-3液晶的化學結構…………….……………………….13
1-4液晶的物理性質…………………….……………….16
1-4-1液晶分子排列的變形……….………….……16
1-4-2光學異方性……………..……………………17
1-4-3液晶的定向效應………………..…………...18
1-5液晶的應用……..……………………………………19
1-6研究動機………………….…………………………..20
第二章 原理…………………..……….……………………21
2-1 液晶的複折射性和光物性…………………………21
2-1-1折射率的異方性…………..…………………21
2-1-2折射率異方性與光學性質……….…………21
2-2介電異方性…………………………………………..26
2-3螺旋距之測量……….……………………………….28
2-3-1Cano楔形槽法……..……….………………..28
2-3-2選擇性光散亂法……………..………………28
2-3-3 指紋狀組織觀測法………....………………29
2-3-4 大曲度半徑透鏡法……..…..………………30
第三章 實驗方法…………………….…….………………32
3-1 材料……………..…………..………….……………32
3-2 實驗儀器………..…………..………….……………33
3-3 實驗步驟………..…..………………….……………34
3-3-1 複合系液晶的配製.…………….………..…34
3-3-2 液晶元件製作………….………………..….34
3-3-3 偏光顯微鏡觀察………..……………..……34
3-3-4 光電效應測試…………..……..…………....34
3-3-5 粉末X-Ray 繞射分析……..…………..…..34
3-3-6 介電性質之測試………………..……..……35
第四章 結果與討論……………….……………………….37
4-1 7OCB/R811複合系液晶…………………………….37
4-1-1 7OCB/R811,(100-X)/X光學組織圖
………..……………………………………….37
4-1-2 7OCB/R811 (100-X)/X X-Ray繞射分析
…..…………………………………………….44
4-1-3 7OCB/R811(100-X)/X誘電性質分析
………………………………………………….47
4-1-4 7OCB/R811複合系熱光學性質………..….51
4-1-5 7OCB/R811複合系光電效應………..…….53
4-2 7OCB/S811複合系液晶……….……..……………..63
4-2-1 7OCB/R811(100-X/X)光學組織圖……....63
4-2-2 7OCB/S811 (100-X/X) X-Ray繞射分圖
……………………………………………….69
4-2-3 7OCB/S811 (100-X/X )誘電性質分析…..72
4-2-4 7OCB/S811 (100-X/X) 的熱光學性質研究.….76
4-2-5 7OCB/S811 (100-X/X) 的光電效應………….78
4-3 7OCB/S811/R811複合系液………………..………82
4-3-1 7OCB/S811/R811複合系液晶相組織圖
……………………………………………...82
4-3-2 7OCB/S811/R811複合系液晶光電效應
…………………………………………….84
第五章 結論……………..………………………………….96
參考文獻……………………………

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