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采用循环伏安电化学沉积方式分别制备了聚邻甲氧基苯胺(1)和聚邻甲氧基苯胺/邻硝基苯胺(2)电致变色薄膜,并通过UV-Vis、分光光度仪、场发射扫描电子显微镜(SEM)对其进行性能表征.结果显示:变色膜1在不同电压下能实现湖绿色(U=-0.5V)和淡紫色(U=0.9V)变化,响应时间约15s,最大透光率变化(△Tmax)约10%(500nm);变色膜2在不同电压下能实现橄榄绿色(U=-0.9V)和深酞蓝色(U=1.4V)变化,响应时间约2s,最大透光率变化(△Tmax)约为20%(497nm);SEM测试得到薄膜2的厚度约550nm,且不同颜色状态下其表面形貌及导电性能有较大的差别.由以上结果可以看出:电致变色薄膜2比1具有更快的响应速度和较好的颜色对比度,因此薄膜2是更好的电致变色材料.
Poly (o-methoxyaniline) (1) and poly (o-methoxyaniline) / o-nitroaniline (2) electrochromic thin films were prepared by cyclic voltammetry and electrochemical deposition. The electrochromic films were characterized by UV-Vis spectrophotometer, Field emission scanning electron microscopy (SEM). The results showed that the change of lake green (U = -0.5V) and lavender (U = 0.9V) can be achieved under different voltages and the response time is about 15s (△ Tmax) was about 10% (500nm). The change of olive green (U = -0.9V) and dark blue (U = 1.4V) were observed under different voltages. The response time About 2s, the maximum transmittance change (△ Tmax) is about 20% (497nm); the thickness of the film 2 obtained by SEM test is about 550nm, and the surface morphology and conductivity under different color conditions are greatly different from the above As a result, it can be seen that electrochromic film 2 has a faster response speed and a better color contrast than 1, and thus film 2 is a better electrochromic material.