研究生: |
吳書慧 Shu-Hui Wu |
---|---|
論文名稱: |
聚乙烯醇掺混量對高分子分散型微膠囊化液晶物性之影響 The physical property studies of Polymer Dispersed Micro-encapsulated Liquid Crystal based on Polyvinyl Alcohol content |
指導教授: |
李俊毅
Jiunn-Yih Lee |
口試委員: |
邱顯堂
Hsien-Tang Chiu 邱士軒 shin-hsuan chiu 王英靖 none |
學位類別: |
碩士 Master |
系所名稱: |
應用科技學院 - 醫學工程研究所 Graduate Institute of Biomedical Engineering |
論文出版年: | 2010 |
畢業學年度: | 98 |
語文別: | 中文 |
論文頁數: | 75 |
中文關鍵詞: | 高分子分散型微膠囊化液晶 |
外文關鍵詞: | Micro-encapsulated Liquid Crystal |
相關次數: | 點閱:246 下載:3 |
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高分子分散液晶(Polymer Dispersed Liquid Crystal;PDLC)中之高分
子含量高則成本低,含量高則遮蔽性不足,在技術上要控制液晶顆粒(Liquid
Crystal droplet)之形成是非常困難的,然而本文所用之高分子分散微膠囊化
液晶(Polymer Dispersed Micro-encapsulation Liquid Crystal;PDMLC)因為型
態固定,所以可以任意改變高分子含量,而不影響液晶顆粒之圓球形狀及其
大小,微膠囊化液晶/PVA 之比例由1.0/1.5~9.0 由低往高含量增加配置塗佈
出的試片中,發現比例超過6.0 以上即試片對光的遮蔽效果變差,比例在
5.0~6.0 之間測出之光電性,其驅動電壓可在25V,改善一般PDLC 的高驅
動電壓的問題,且有效降低高成本液晶之使用量。
In general, the higher polymer content in the polymer dispersed liquid
crystal lead to cost competitively, but the opacity of PDLC film will be relatively lower with field-off. It is difficult to control the droplet size and shape of LC in the polymer matrix by phase separation condition. In this article we use the micro-encapsulation technology to form the polymer dispersion microencapsulated LC (PDMLC) formulations which have similar droplet size and shape of LC. This approach is easy to adjust the polymer content, and no influence on the droplet size and shape of LC. We adjust the ratio of polymer (PVA) content (form 1.5 to 9.0) to find the optimal optical property. Finally, the results indicate that the ratio of polymer content between 5.0 and 6.0, the driving voltage can drop down to 25V. If the ratio of polymer content is larger than 6.0,the opacity of PDLC film will become lower.
1. 化工資訊與商情 MAY,2009 NO.71,p. 31
2. S.-T. Wu, D.-K. Yang, “Reflective Liquid Crystal Displays”, John
Wiley & Sons, 2001.
3. P. S. Drzaic, “Series on Liquid Crystals Volume 1: Liquid Crystal
Dispersion”, World Scientific Publishing Co. Pte. Ltd; 1995.
4. F. Reinitzer, Wiener Monatscher, fur chem., 9, 421 (1888)
5. O. Lehmann, Z. phys.chem., 4, 462 (1889)
6. P. G. de Gennes and J. Prost, The Physics of Liquid Crystals, 2nd ed.,
Clarendon Press, Oxford, (1993) .
7. Birendra Bahadur, “Liquid Crystals – Applications and Uses,” Vol.1,
World Scientific, (1990).
8. G. Vertogen, W.H. de Jeu, “Thermotropic Liquid Crystals,
Fundamentals,” (1988).
9. 陳連春譯,最新液晶應用技術,建興出版社,第一章,民國86 年。
10. Peter J.Collings, Liquid Crystal :Nature’s Delicate Phase of Matter,
Princeton University Press, Princeton (1990)
11. A. D. L. Chandani, E. Gorecka, Y. Ouchi, H. Takezoe, and A. Fukuda,
J. Appl. Phys, Part 2 28, L1265 (1989).
12. 劉瑞祥譯,液晶之基礎與應用,國立編譯館p.15, 民國85 年。
13. G. W. Gray , J. W. Goodby, Smectic Liquid Crystals-textures and
structures, Leonard Hill, London, (1984).
14. V. Tsvetkov:Acta Physicochim.(USSR),16, p. 132(1942).
15. W. Maier and A. Saupe:Z. Natruforsch., 13a, p.564(1958);ibid., 14a,
p882(1959);ibid., 15a, p.287(1960).
16. A. Saupe and W. Maier:Z. Naturforsch., 16a, p816(1961).
17. 松本正一,角田市良,"液晶之基礎與應用"(臺北市,國立編譯
館,1996).
18. I. C. Khoo, Liquid Crystals:Physical Properties and Nonlinear Optical
Phenomena (Wiley, New York, 1995).
19. M. Segev, B. Crosignani, A. Yariv and B. Fischer, Phys. Rev.
Lett.,68,923 (1992).
20. 聚乙烯醇polyvinyl alcohol (PVA) 長春石油化學股份有限公司.
21. 主導性新產品合約暨計畫書:電可調光玻璃。
22. 界面活性劑於高分子分散液晶薄膜之應用 盧燕玲、李俊毅/國立
台灣科技大學纖維及高分子工程所