偶氮苯接枝的聚离子液体的合成及其多功能光学应用  

Synthesis of Azobenzene Grafted Poly(ionic liquid)s and Its Multifunctional Optical Applications

作　　者：许神剑 杨思卿 缪涵 杨溪 林绍梁[1] Shen-jian Xu;Si-qing Yang;Han Miao;Xi Yang;Shao-liang Lin(Shanghai Key Laboratory of Advanced Polymeric Materials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237;Shanghai Ninth People’s Hospital,Shanghai JiaoTong University School of Medicine,Shanghai 200011)

机构地区：[1]上海市先进聚合物材料重点实验室、华东理工大学材料科学与工程学院,上海200237 [2]上海交通大学口腔医学院、上海交通大学医学院附属第九人民医院,上海200011

出　　处：《高分子学报》2024年第12期1696-1705,共10页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号52325308,52203258,52073092);上海市浦江计划(项目号21PJ1402100)资助.

摘　　要：采用传统的自由基聚合和聚合后修饰相结合的策略,设计并合成了一种具有不同偶氮苯接枝率的新型聚离子液体(PIL-Azo-x),并系统地研究了其物理化学性质和光学性能.利用紫外-可见分光光度计(UV-Vis)对聚离子液体薄膜的光致异构化、透射光谱、散射光谱和透射雾度进行了详细表征.结果表明,通过简单的浇铸法制备的薄膜具有强紫外屏蔽性能(200~400 nm)、光诱导的透过率可调谐性能(400~600 nm)、高透明度(600~800 nm)、良好的热稳定性和极佳的酸碱稳定性等优点.进一步,结合掩膜版法,该薄膜还可以重复定制不同的透明图案.这种偶氮苯接枝的聚离子液体薄膜有望推动多功能光学涂层、智能窗户等领域的发展.Three kinds of poly(ionic liquid)s(PIL-Azo-x)with different grafting ratios of azobenzene(10%,30%,and 50%)were successfully synthesized by using conventional free radical polymerization and post-polymerization modification strategies.The initial decomposition temperatures of PIL-Azo-x were higher than 300℃,indicating good thermal stability.The films prepared by simple casting method exhibited excellent UV shielding performance in the 200-400 nm band,which can block almost all UV rays;in the 400-600 nm band,they have tunable transmittance performance,which can be reversibly changed under the irradiation of 365 nm UV and 450 nm visible light,and the transmittance decreases accordingly with the increase of the content of azobenzene;in the 600-800 nm band,they show a high transmittance performance,which can be reversed with an increase in the content of azobenzene.In addition,the pure PIL-Azo-x casted films have excellent acid and alkali resistance,and the transmission spectra of the films remain almost unchanged after immersion in a pH=2 HCl solution or pH=12 NaOH solution for 6 h,which makes them suitable for the more severe environments.Finally,its application in the field of pattern writing and erasing is demonstrated in combination with the mask plate method,in which the transparent film can be repeatedly customized with different patterns under the irradiation of 365 nm UV light and 450 nm visible light.These poly(ionic liquid)films with strong UV shielding,tunable transmittance,high transparency,good thermal stability,and excellent acid-base stability are expected to contribute to the development of multifunctional optical coatings,smart windows,and other fields.

关 键 词：聚离子液体 偶氮苯 紫外屏蔽 光响应 高透过率 

分 类 号：TQ317[化学工程—高聚物工业]