可控变色织物制备及颜色控制研究

基于聚苯胺电致变色高聚物、采用反射型电致变色器件结构模型,以柔性导电织物作为电极,构建了可控变色织物,可在-1.0～+1.0 V低电压范围内实现颜色变化显著的黄色和绿色的可逆响应.系统研究了变色织物在不同电压、不同弛豫时间及不同颜色工作电极下的L*a*b*,ΔE*值及反射率曲线,且讨论了透射型电致变色器件和电致变色织物的区别.随着正电压的增加,变色织物对应的a*b*依次减小,蓝绿色加深;随着负电压的增加,变色织物对应的a*b*依次增加,变色织物黄色加深.撤去电压后变色织物发生放电弛豫,慢慢回复到未加电压时的本征态.工作电极底色对电致变色织物也有显著的影响.变色织物的断电放电弛豫时间低于透射型电致变色器件.

THE PREPARATION AND COLOR CONTROL OF THE CONTROLLABLE ELECTROCHROMIC FABRIC

Using electrochromic polymer-polyaniline,taking flexible conductive fabric as electrodes and based on the reflective electrochromic device structure model,a kind of controllable chromic fabric is assembled,which shows distinct color change between yellow and green in the low-voltage range of-1.0~+1.0 V,and provides the foundation for the preparation of the man-made controllable electrochromic fabric.The L*a*b* values,ΔE* and the reflectivity curve of the electrochromic fabric are studied systematically at different voltages,with different relaxation time and with different color of working electrode.The difference between transmission-type electrochromic devices and the electrochromic fabric is also discussed.As the positive voltage increases,the corresponding a*b* values of the electrochromic fabric decrease and blue-green color deepens.With the growth of the negative voltage,the a*b* values of the electrochromic fabric increase and yellow color deepens.When the voltage of the electrochromic fabric is removed,the discharge relaxation phenomenon appears,and the fabric returns to the eigenstate.The background color of the electrode has significant effect on the electrochromic fabric.The relaxation time of the electrochromic fabric after removing the voltage is shorter than that of the transmission-type electrochromic devices.