制備條件對梯形聚硅氧烷取向層光取向行為的影響

曹暉; 王影; 黃維; 李克軒; 謝萍; 朱思泉; 楊槐

doi:10.13374/j.issn1001-053x.2008.07.050

制備條件對梯形聚硅氧烷取向層光取向行為的影響

doi: 10.13374/j.issn1001-053x.2008.07.050

曹暉¹,
王影¹,
黃維¹,
李克軒¹,
謝萍²,
朱思泉³,
楊槐¹

1. 北京科技大學材料科學與工程學院, 北京 100083;
2. 中國科學院化學研究所高分子物理與化學國家重點實驗室, 北京 100080;
3. 首都醫科大學附屬北京同仁醫院眼科中心, 北京 100730

基金項目:

教育部重點資助項目(No.104187)

高等學校博士點基金資助項目(No.20050008036)

北京市科委科技計劃資助項目(No.Y0405004040121)

詳細信息

作者簡介:
曹暉(1977-),男,講師,博士,E-mail:caohui@mater.ustb.edu.cn;楊槐(1965-),男,教授,博士生導師

中圖分類號: TN104.3
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- 被引次數: 0
出版歷程
- 收稿日期: 2008-02-28
- 修回日期: 2008-04-22
- 網絡出版日期: 2021-08-06

Effects of prepared conditions on the photo-alignment behavior of the ladder-like polysiloxane film

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
3. Beijing Tongren Eye Center, Beijing Institute of Ophthalmology, Capital University of Medical Science, Beijing 100730, China

摘要

摘要: 選用側鏈含有雙元光敏基團的梯形聚硅氧烷材料作為光取向材料,采用偏光顯微鏡(POM)及晶體旋轉法,研究了梯形聚硅氧烷光取向層的制備條件,包括取向劑濃度、紫外光輻照度及光照時間對光取向層的取向行為的影響.結果表明,取向劑濃度越大,光敏基團更易于組裝成垂直取向狀態,進而誘導液晶分子形成垂直取向的分子排列方式.在一定的紫外光輻照度范圍內可以有效地引起偶氮苯光敏基團的面內、面外異構化及再取向,有利于取向層誘導液晶分子形成平面取向的分子排列方式.紫外光光照時間的增加有利于取向層誘導液晶分子形成平面取向的分子排列方式.
- 梯形聚硅氧烷 /
- 光取向 /
- 平面取向 /
- 垂直取向 /
- 光敏基團
Abstract: Photo-alignment materials were prepared from ladder-like polysiloxane materials containing dual photo-reactive groups. The effects of solution concentration, irradiance and irradiation time on the photo-alignment behavior of the ladder-like polysiloxane film were investigated by polarized optical microscopy (POM) and the crystal rotation method. It was found that photo-reactive groups were prone to form homeotropic alignment with the increase of the solution concentration, and then it could induce liquid crystal molecules to form homeotropic alignment. The isomerization and reorientation both in and out of plane of azobenzene groups could be achieved within a suitable irradiance range, and then it was beneficial to the formation of in-plane alignment of liquid crystal molecules. Increasing the irradiation time availed the formation of in-plane alignment of liquid crystals molecules.
- ladder-like polysiloxane /
- photo-alignment /
- in-plane alignment /
- homeotropic alignment /
- photo-reactive group