二氧化钒-荧光增白剂-有机聚合物三层多功能复合薄膜  

Three-layer multifunctional vanadium dioxide-fluorescent brightener-organic polymer composite films

作　　者：高迎 秦成远 聂永[1] 呼啸 徐慧妍 苗金玲[2] 蒋绪川 GAO Ying;QIN Chengyuan;NIE Yong;HU Xiao;XU Huiyan;MIAO Jinling;JIANG Xuchuan(Institute for Smart Materials&Engineering,University of Jinan,Jinan 250002,China;School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250002,China)

机构地区：[1]济南大学智能材料与工程研究院,济南250002 [2]济南大学化学化工学院,济南250002

出　　处：《复合材料学报》2022年第8期3828-3844,共17页Acta Materiae Compositae Sinica

基　　金：济南大学和山东莘纳智能新材料有限公司资助项目。

摘　　要：二氧化钒(VO_(2))是一种典型的热致变色材料,用于智能窗可有效降低建筑能耗。然而,VO_(2)智能玻璃的颜色和稳定性问题限制了其大规模应用。本文报道一种VO_(2)基三层荧光复合膜,包括VO_(2)@SiO_(2)热致变色层、荧光增白剂分子层和有机聚合物层。VO_(2)@SiO_(2)层可根据外界温度变化,调控太阳光的摄入量,起到冬暖夏凉的作用,其核壳结构有利于提高VO_(2)的稳定性;荧光分子层在太阳光照射下,吸收紫外光,发射蓝色荧光,从而改善VO_(2)涂层固有的棕黄色;有机聚合物层作为最上层,能有效保护下层的VO_(2)@SiO_(2)层和中间的荧光分子层,增加复合薄膜的稳定性。与纯VO_(2)膜相比,这种复合膜不但保持了较高的可见光透过率和太阳光调制能力,而且在太阳光下颜色可逆地从棕黄色变为蓝色,同时稳定性和紫外阻隔能力明显提升,有利于VO_(2)基智能窗的推广和应用。Vanadium dioxide(VO_(2))is a typical thermochromic material that can be used for smart windows,which can effectively reduce the building energy consumption.However,the issues of the yellow brown color and instability of VO_(2) based smart glass restrict its wide application.Herein,a series of VO_(2) based three-layer fluorescent composite films has been reported.The composite films consist of VO_(2)@SiO_(2) based thermochromic layer,fluorescent brightener layer and organic polymer layer.The VO_(2)@SiO_(2) layer can control the sunlight intake with the change of external temperature,regulating the indoor temperature,with the core-shell structure improving the stability of the film.The fluorescent brightener layer absorbs ultraviolet irradiation and emit blue fluorescence,thus improving the color of VO_(2) coating.As the top layer,the organic polymer layer can effectively protect the lower layers and increase the stability of the whole composite film.Compared with the pure VO_(2) films,these composite films not only maintain high visible light transmittance and solar modulation ability,but also reversibly change color from yellowbrown to blue under sunlight.Meanwhile,the stability and the UV blocking property are also significantly improved.The properties of this type of composite films are beneficial to the promotion and application of VO_(2)-based smart windows.

关 键 词：二氧化钒 复合薄膜 智能玻璃 荧光增白剂 聚合物 

分 类 号：TB332[一般工业技术—材料科学与工程]