Interaction of Ions in Liquid Crystals with Polyimide Films in Liquid Crystal Cells

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  • MIZUSAKI Masanobu
    Department of Electronics, Graduate School of Engineering, Tohoku University
  • MIYASHITA Tetsuya
    Department of Electronics, Graduate School of Engineering, Tohoku University
  • UCHIDA Tatsuo
    Department of Electronics, Graduate School of Engineering, Tohoku University Sendai National College of Technology

Bibliographic Information

Other Title
  • 液晶セルを構成する液晶中のイオンとポリイミド膜との相互作用
  • エキショウ セル オ コウセイ スル エキショウ チュウ ノ イオン ト ポリイミドマク ト ノ ソウゴ サヨウ
Published
2011
DOI
  • 10.1295/koron.68.743
Publisher
The Society of Polymer Science, Japan

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Description

Even a quite small amount of ions added to liquid crystals (LCs) adsorbs to the surfaces of the alignment films in liquid crystal cells. For the investigation of such adsorption, two liquid crystal cells were prepared. We used a polyimide having benzene moieties as the alignment film material. One cell was filled with a liquid crystal including a cyano group and the other with a fluorinated compound. For both cells, the activation energy (determined by measurements of residual direct current voltage at various temperatures) of the adsorption for the ions to the surfaces of polyimide films were below 0.3 eV. The results indicate that the adsorption takes place due to van der Waals interaction, hydrogen bonding, or ion-π interaction between the ions in the LCs and the polyimide films.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 68 (11), 743-748, 2011

    The Society of Polymer Science, Japan

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