Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (18): 1921-1924. Previous Articles     Next Articles

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  1. (1南京工业大学理学院应用化学系 南京 210009)
    (2东南大学生物电子学国家重点实验室 南京 210096)
  • 投稿日期:2009-12-30 修回日期:2010-02-20 发布日期:2010-05-18
  • 通讯作者: 韩国志
  • 基金资助:


Study of Photomodulation of PDLC Membrane Based on Azo-LC

Han Guozhi*,1,2 Liu Xuewen1 Ma Hongfei1   

  1. (1 College of Science, Nanjing University of Technology, Nanjing 210009)
    (2 State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096)
  • Received:2009-12-30 Revised:2010-02-20 Published:2010-05-18

Polymer dispersed liquid crystals (PDLC) membrane was prepared by solvent method based on PS and photosensitive nematic LCs (5CB+BMAB). Optical switch of the PDLC membrane was realized through photoinduced phase transition of azo-LC BMAB. Experimental results indicated that liquid crystals molecule assembled as double-pole configuration inside PDLC membrane. Temperature range for optical control was between 19 and 36 ℃. Transmittance of the membrane increased from 6% to 93% after irradiated by UV light around 360 nm. With the same work distance, photomodulation time was related with diameter of micropores in PDLC membrane. At the same concentration of liquid crystal, photomodulation time would increase with diameter of micropore reduced.

Key words: azo-LCs, PS, PDLC, photoinduced phase transition, photomodulation