Preparation and Photochromic Properties of Viologen/Polymer Film Blended with Copper Chloride

doi:10.7517/j.issn.1674-0475.2010.01.29

Abstract

Abstract: Fast erasable photochromic films with well photofatigue property are prepared by blending of copper chloride into viologen/polyvinylpyrrolidone mixture.Photochromic performance,thermal fading and photofatigue properties of the films were studied.It has been found that with the addition of copper chloride there is color lost in the first UV irradiation,but the fading rate of the colored films are faster.The half life at 60℃of the film,prepared by exposing to UV irradiation for 80 s and mole ratio of copper chloride to viologen 1:1,is abut 9 min,in comparing with 54 min for the film with no copper chloride.The higher mole ratio of copper chloride in the films,the faster the thermal erasing rate is.With increasing of coloring-discoloration cycle number,the photochromic color of the films become much deeper,and the more copper chloride in the films,the deeper the color is.These photochromic films can be used for information storage,sunglass and smart windows.

Key words: photochromism, viologen, copper chloride, half life, photofatigue

CLC Number:

LI Zhi-bin, LI Ling, ZHANG Zhen-lin, WANG Yue-chuan. Preparation and Photochromic Properties of Viologen/Polymer Film Blended with Copper Chloride[J]. Imaging Science and Photochemistry, 2010, 28(1): 29-36.

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