3B13 ラビングフリー基板上でのモノドメイン配向 (3) : 化学構造と配向性

概要

論文の詳細を見る
Orientation of liquid crystalline(LC) molecules depends on the condition of the substrate surface. It has been reported that LC molecules can be aligned uniaxially on a polymer surface prepared by using a dipping coating method from polymer solution without rubbing the surface. This study was aimed to understand the mechanism of molecular alignment caused by the interaction between the surface of polymers and LC molecules. Optical micrographs of LCs in sandwich-typed cells depict that a dip-coated polystyrene(PS) substrate exhibits highly homeotropic orientation as well as a dip-coated poly(vinyl alcohol) (PVA) substrate, whereas a dip-coated polyimide substrate causes LC molecules to align spontaneously parallel to the dipping direction without rubbing treatment. The light scattering measurement, which gives the molecular motion in the LC state, confirms that the PS-coated substrate causes much higher degree of homeotropic alignment than the PVA-coated substrate, while an aminosilane-coated substrate shows almost complete homeotropic alignment.
日本液晶学会の論文
1995-09-10