静电喷雾法/原位洗脱法结合制备电致变色薄膜

Preparation of electrochromic film by combination of electrostatic spray method/in-situ washing method

电致变色材料在提倡低碳节能的发展理念下有很好的发展前景,而探索一种高效简单且性能优异的制备工艺尤为重要。利用静电喷雾法结合原位洗脱法制备了聚合物电致变色薄膜。根据电解质盐的颜色适配性和溶解性,选择四丁基高氯酸铵(TBAP)作为模板剂,在易加工的TPA-OMe-PA溶液中添加不同比例的电解质盐,然后利用静电喷雾技术在ITO玻璃表面沉积制备薄膜,再通过原位洗脱法去除其中的模板剂-电解质盐,最终制备出含有多层级孔结构的聚合物薄膜。采用电子扫描显微镜对其形貌进行分析,利用电化学工作站结合紫外/可见/红外光谱仪研究了薄膜的电致变色性能。研究结果表明,利用静电喷雾技术与原位洗脱法制备的聚合物薄膜具备多层级孔结构和良好的电致变色性能。其中电解质含量为33.3%(质量分数)时,多层级孔隙率最高,且电致变色性能最为优异,漂白时间/着色时间缩减至0.6 s/1 s,着色效率达到608.2 cm^(2)·C^(-1),为已报道基于相同材料的电致变色薄膜的最快响应速度。

Electrochromic materials have good development prospect under the development concept of promoting low carbon and energy saving.In order to explore the efficient,simple and excellent preparation process,the polymer electrochromic film was prepared by the electrostatic spray method combined with the in-situ elution method.According to the color adaptability and solubility of the electrolyte salt,tetrabutylammonium perchlorate(TBAP)was selected as the template,and different proportions of electrolyte salt were added to the easy-to-process TPA-OMe-PA solution,then film was deposited on the surface of the ITO glass by electrostatic spray technology.After that,the electrolyte salt was precipitated by in-situ washing method.The morphology of the film was analyzed using scanning electron microscope,and the electrochromic properties of the film were studied using the electrochemical workstation combined with ultraviolet/visible/infrared spectrometer.The research results show that the polymer film prepared by electrostatic spray technology and in-situ elution method have multi-level pore structure and excellent electrochromic properties.Especially when the electrolyte content is 33.3%(mass fraction),the multi-layer porosity is the highest,and the electrochromic performance is the best.The bleaching time/coloration time is reduced to 0.6 s/1 s,and the coloration efficiency reaches 608.2 cm^(2)·C^(-1),which is the best record for the polyamide based electrochromic film.