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研究生:陳世強
研究生(外文):Chen, Shih-Chiang
論文名稱:應用黏滯力及靜電力實現雙穩態粒子串電子紙
論文名稱(外文):Realizing Bistable Particle Chain Electronic Papers Using Viscous and Electrostatic Forces
指導教授:范士岡
指導教授(外文):Fan, Shih-Kang
學位類別:碩士
校院名稱:國立交通大學
系所名稱:奈米科技研究所
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:2010
畢業學年度:99
語文別:中文
論文頁數:106
中文關鍵詞:電子紙雙穩態極化溫感型高分子
外文關鍵詞:Electronic paperPolarizationBistabilityThermo-sensitive polymer
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本論文成功地利用溫控黏滯度與靜電力,展示一具有雙穩態特性的粒子極化反射式顯示介質。文中所提出的電子紙顯示技術有別於所有其他技術,係主要利用液體中粒子極化成串現象,進而改變顯示介質的穿透度達成明暗兩個顯示狀態。首先,我們利用了溫感型材料填加進入聚苯乙烯水溶液進行雙穩態特性之測試,在溶液黏滯度低時改變顆粒狀態,隨後以高黏滯度固定其中之顆粒。我們以4 wt%明膠-聚苯乙烯水溶液當成顯示介質,在室溫下連續測量一極化成串、明態之顯示介質,發現其穿透度於無外加電場與能量消耗下,在七個小時之觀察時間內並無明顯變化。除此之外,我們亦發現聚N-異丙基丙烯胺(Poly(N-isopropylacrylamide))的添加可以改善粒子極化顯示介質的對比度表現。本論文亦利用矽油中正負相異電性之碳粉溶液 驗證靜電吸引力與粒子極化成串維持之關係。同時也測試以羧基及胺基修飾之聚苯乙烯,其表面攜帶相異正負電性之穩定效果,然而發現顆粒的帶電量過小,而無明顯維繫粒子串之現象。
We demonstrate a bistable reflective particle chain display medium by viscous and electrostatic forces. Different from other particle-based electronic paper technologies, the formation of the particle chains by an electric field changes the transmittance of the particle suspension and further determines the dark and bright states of the display medium. Here thermo-sensitive materials are dissolved into a polystyrene particle suspension. The particle chains are arranged at a proper temperature with a lower viscosity and stabilized at another temperature with a higher viscosity. By using 4 wt% gelatin, polystyrene, and water as the display medium, the particle chains can be maintained for at least 7 hr with no electric field applied. We also observe the contrast ratio of the display medium is enhanced by adding PNIPAM (Poly(N-isopropylacrylamide)). On the other hand, the electrostatic force is investigated for the stability of the polarized particle chains. The polarized particle chains containing printer toners with positive and negative charges dispersed in silicone oil are found more stable. We also test the particle suspension containing negative and positive polystyrenes particles whose surfaces are modified by carboxyl and amino functional groups, respectively. However, the polarized particle chains start to deform once the applied electric field is removed. We suspect that the electrostatic force is not sufficient for the inadequate charges of each particle.
第一章 緒論 1
1.1 前言 1
1.2 研究目標與動機 2
1.3 本論文組織架構 3
第二章 電子紙 4
2.1 概念 4
2.2 電子紙顯示介質與技術分析 5
2.2.1 粒子式電子紙–Gyricon bead擰轉球技術 5
2.2.2 粒子式電子紙–電泳技術 8
2.2.3 粒子式電子紙–快速粉流體(QR-LPD®)技術 16
2.2.4 液晶型電子紙–膽固醇液晶技術 17
2.2.5 微機電式電子紙–介電潤濕以及電驅動微流體技術 21
2.2.6 微機電式電子紙–干涉調變技術 25
第三章 粒子極化反射式顯示介質 28
3.1 文獻回顧 28
3.2 顯示原理以及特性探討 30
3.3 實驗設計 34
3.4 實驗儀器設備 36
3.5 實驗測試片製作 42
第四章 溫度調控黏滯度以達雙穩態特性之探討 46
4.1 溫度操控黏滯度 46
4.2. LCST溫感型高分子材料 46
4.2.1 利用LCST型溫感型高分子達成雙穩態之概念 47
4.2.2 初步測試以及觀測 48
4.2.3 雙穩態特性之結果與討論 50
4.2.4 優化巨觀表現之探討 53
4.3 UCST溫感型高分子材料 55
4.3.1 利用UCST型溫感型高分子達成雙穩態之概念 56
4.4 PDMAM合成以及測試 57
4.5 UCST型溫感型材料–明膠(Gelatin) 62
4.5.1 明膠(Gelatin)之初步測試 62
4.5.2 4 wt% Gelatin–聚苯乙烯混和溶液之臨界溫度測試 64
4.5.2.1 黏度儀測量結果與討論 64
4.5.2.2 毛細現象測量結果與討論 65
4.5.3 溫控黏滯度效應於顯示介質反應速率之影響 67
4.5.4 明膠(Gelatin)對於粒子串維繫之長時觀察 71
4.5.5 溫控黏滯度效應於顯示介質回復速率之影響 73
4.5.6 4 wt% Gelatin-聚苯乙烯粒子顯示介質雙穩態特性展現 75
4.6 實驗結果與討論 77
第五章 正負相異電性粒子混和達雙穩態特性之探討 78
5.1 相異電性粒子混和達雙穩態之概念 78
5.2 帶相異電荷之印表機碳粉–矽油溶液 80
5.3 帶相異電荷之聚苯乙烯奈微球體水溶液 85
5.4 實驗結果綜合討論與比較 90
第六章 結論與未來展望 91
6.1 結論 91
6.2 未來展望 92


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