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Study of the Structyure of Phase Separation by the Electric Filed Induced

Author: JieHuiJie
Tutor: FanZhiXin
School: Hebei University of Technology
Course: Theoretical Physics
Keywords: Liquid crystal Polymer dispersed liquid crystal Phase separation Bistable E-paper
CLC: O753.2
Type: Master's thesis
Year: 2010
Downloads: 26
Quote: 0
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Abstract


The LCD device research has gradually entered \PDLC polarizers and alignment layer is not required, and the preparation process is simple, and the wide range of applications. Such as electronic paper, flexible display of the large size, dimming glass, electronic curtains, grating, etc.. E-paper technology in progress, should further as LCD. In this paper, the polymer dispersed liquid crystal (PDLC), based on the proposed new polymer dispersed nematic liquid crystal bistable mode, in order to be able to prepare a bistable nature, low driving voltage, fast response, excellent contrast polymer dispersed nematic liquid crystal film, and strive to make the polymer dispersed nematic liquid crystal bistable can achieve. In order to achieve the bistable, First conceived obtain structure of LCD parties droplets. When the liquid crystal droplets to the liquid crystal molecular conformations will have the same border, vertical edge distribution, are likely to be stable. In practical trials, this article consider side by applying an alternating electric field induced phase separation of the polymer-dispersed liquid crystal, to verify the effect of the alternating electric field the phase separation structure of the polymer, the polymer directional growth of the liquid crystal molecules to generate a weak anchoring. The polymer dispersed liquid crystal polymer will be oriented along the electric field or perpendicular to the direction of the electric field in the phase separation process, the process of crystallization takes place, the crystal growth. After the completion of phase separation due to the anchoring effect of the long chain polymer molecules, the liquid crystal molecules will maintain the direction of the configuration consistent Ordering bistable structure is easily formed in the display, a bistable liquid crystal eBook developed to provide a theoretical basis and test inspection. In this article, done a lot of experiments in order to investigate the formation of droplets of liquid crystal square. Including the positive the LCD and negative LCD stereospecific polymerization of the applied AC electric field induced by the formation of metastable structures. Polymer dispersion weak anchoring of the positive and negative liquid crystal metastable structures is obtained by experiment. Steady state structure of the life of the well, can be maintained at at least a month or more. Theory and comparative analysis of the experimental results, we can draw the conclusion polymer dispersions have bistable nematic liquid crystal. However, due to limited time and energy ratio and experimental aspects of gender LCD done little research. Look forward to in the future to continue the unfinished work, to meet the requirements of real practical.

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CLC: > Mathematical sciences and chemical > Crystallography > Amorphous and class crystalline > Class crystalline > Liquid crystal
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