Transparent Photochromic Wood Composites Incorporating AgBr Nanoparticles for UV-shielding Applications  

作　　者：Cong Zhang Yujun Ma Tao Lin Xuefeng Yin Xiaoyao Wei Zhongxiang Wang 

机构地区：[1]National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,Key Laboratory of Paper based Functional Materials of China National Light Industry,College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science&Technology,Xi'an,Shaanxi Province,710021,China

出　　处：《Paper And Biomaterials》2021年第4期21-29,共9页造纸与生物质材料（英文）

基　　金：This work was supported by the Basic Research Project of Natural Science in Shaanxi Province(2019JM-485);National College Students'Innovation and Entrepreneurship Training Program(S202010708007).

摘　　要：Transparent wood(TW)is a wood-based biomaterial with several advantages,such as high optical transmittance,low thermal conductivity,and tunable haze.TW is functionalized according to its transparency to broaden its applications in different fields.Several studies have examined wood functionalization in recent years;however,few studies have reported photochromic TW(PTW)for ultraviolet(UV)-shielding window applications.Herein,PTW was obtained by infiltrating the delignified wood template with photochromic silver bromide(AgBr)nanoparticles and a pre-polymerized methyl methacrylate(MMA)mixture solution.The obtained PTW can adjust the luminous flux on change in the color in the visible light region.The photochromic properties were examined,and the optical properties of the composites were characterized using UV-Vis spectrophotometry.Light transmittance of PTW was up to 86.5%at 800 nm before UV irradiation,and it decreased to 70.1%at 800 nm after UV irradiation,as the wood color changed from colorless to dark purple under UV irradiation.Thus,this work not only achieves high-value utilization of wood,but also produces a new material that can be used in varied fields,such as UV-shielding,energy saving,and smart building.

关 键 词：transparent wood PHOTOCHROMIC UV-SHIELDING NANOPARTICLES 

分 类 号：TB33[一般工业技术—材料科学与工程]