Anisotropy in surface free energy of rubbed polyimide thin films

被引：0
|
作者：
Zheng, W. [1 ]
Lu, C. [1 ]
Yeh, Y. [1 ]
Tien, Y. [1 ]
机构：
[1] Natl Sun Yat Sen Univ, Inst Electroopt Engn, Kaohsiung 804, Taiwan
来源：
AD'07: Proceedings of Asia Display 2007, Vols 1 and 2 | 2007年
关键词：
rubbed polyimide; surface free energy; surface anisotropy; surface wettability;
D O I：
暂无
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The application of mechanical rubbing to polyimide breaks the symmetry on the polymer surface and promotes a template for liquid crystal alignment. Macroscopic observation of the surface symmetry of the rubbed polyimide is made by means of the measurement of the free energy in the surface region. It is found that the free energy of the rubbed polyimide thin films varied with the azimuthal angle against the rubbing direction. The increase of rubbing strength results in the decrease in the surface free energy of the polymer thin films. Mechanical rubbing also modifies the wettability of the polyimide surface.
引用
收藏
页码：1733 / 1737
页数：5
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