Shao Xiongchao, Yang Yuhua, Huang Qidi, Dai Dacheng, Fu Haichang, Gong Guohua, Zhang Cheng, Ouyang Mi, Li Weijun, Dong Yujie
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
Oriental Anasak Crop Technology Co. LTD, Longyou, 324400, P. R. China.
Dalton Trans. 2023 Oct 31;52(42):15440-15446. doi: 10.1039/d3dt01230a.
Electrochromic polymer film preparation methods such as spin coating, spray coating, and electrochemical polymerization, are commonly used. At present, developing new film preparation technology is an important aspect in the field of electrochromics. Herein, a continuous self-growing method based on the chemical reaction occurring on the surface of an ITO glass between a metal oxide and organic acid groups was successfully applied to prepare electrochromic polymer films at a mild room temperature. SEM, FT-IR spectroscopy, XPS, and XRD characterization methods were combined to reveal the process and mechanism of film formation. The following notable electrochromic properties were observed: switching time within 6 s, contrast reached 35%, and minimal decrease of stability after 600 cycles. Finally, the patterned films were obtained through the directional growth of polymers in solution. This study provides an effective strategy for designing and preparing electrochromic films by self-growing methods in future applications.
常用的电致变色聚合物薄膜制备方法，如旋涂、喷涂和电化学聚合。目前，开发新的薄膜制备技术是电致变色领域的一个重要方面。在此，一种基于ITO玻璃表面金属氧化物与有机酸基团之间发生的化学反应的连续自生长方法，成功地应用于在温和的室温下制备电致变色聚合物薄膜。结合扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）、X射线光电子能谱（XPS）和X射线衍射（XRD）表征方法，揭示了薄膜形成的过程和机理。观察到以下显著的电致变色性能：切换时间在6秒内，对比度达到35%，600次循环后稳定性的下降最小。最后，通过聚合物在溶液中的定向生长获得了图案化薄膜。本研究为未来应用中通过自生长方法设计和制备电致变色薄膜提供了一种有效策略。
