Preparation of epoxy resin/rare earth doped aluminate nanocomposite toward photoluminescent and superhydrophobic transparent woods  

作　　者：Mehrez E.El-Naggar Sami Ullah S.Wageh M.A.Abu-Saied Tawfik A.Khattab Dalal Alhashmialameer Manal Abou Taleb E.A.Matter 

机构地区：[1]Institute of Textile Research and Technology,National Research Center,Dokki,Cairo,16221,Egypt [2]Research Center for Advanced Materials Science(RCAMS),King Khalid University,P.O.Box 9004,Abha,61413,Saudi Arabia [3]Department of Chemistry,College of Science,King Khalid University,P.O.Box 9004,Abha,61413,Saudi Arabia [4]Department of Physics,Faculty of Science,King Abdulaziz University,Jeddah,21589,Saudi Arabia [5]K.A.CARE Energy Research and Innovation Center,King Abdulaziz University,Jeddah,21589,Saudi Arabia [6]Polymeric Materials Research Department,Advanced Technology and New Materials Research Institute,City of Scientific Research and Technological Applications(SRTACITY),New Borg El-Arab City,Alexandria,21934,Saudi Arabia [7]Department of Chemistry,College of Science,Taif University,Taif,21944,Saudi Arabia [8]Department of Chemistry,College of Science and Humanities,Prince Sattam Bin Abdulaziz University,Al-kharj,11942,Saudi Arabia [9]Department of Polymer Chemistry,National Center for Radiation Research and Technology(NCRRT),Egyptian Atomic Energy Authority,Nasr City,P.O.Box 7551,Cairo,11762,Egypt [10]Department of Chemistry,Faculty of Science,Damanhour University,22111 Damanhour,Egypt

出　　处：《Journal of Rare Earths》2023年第3期397-405,I0003,共10页稀土学报（英文版）

基　　金：support and funding of King Khalid University through Research Center for Advanced Materials Science(RCAMS)under grant no:RCAMS/KKU/008/21;the support provided by King Abdullah City for Atomic and Renewable Energy(K.A.CARE)under K.A.CARE-King Abdulaziz University Collaboration Program。

摘　　要：A translucent wooden substrate with long-lasting phosphorescence,high photostability and durability,tough surface,ultraviolet protection,high optical transmittance,and superhydrophobicity was developed.This long-lasting phosphorescent wooden substrate is able to continue emitting light for extended time periods.Lignin-modified wood(LMW)was immobilized with a solution of epoxy resin(ER)and rare-earth doped aluminate(REDA)phosphor nanoparticles(NPs).For an improved dispersion of pigment,REDA was synthesized in a nanoscale particle size,and characterized by transmission electron microscopy(TEM)to indicate a particle size of 8-14 nm.The crystal structure of REDA nanoparticles was also proved by X-ray diffraction(XRD).For an improved production of long-persistent phosphorescent colo rless woods,REDA must be well-dispersed in MAA without aggregation.Absorption and emissio n,as well as decay and lifetime spectra were explored.The morphologies of the wooden substrates with different ratios of REDA were investigated by scanning electron microscopy(SEM),X-ray fluorescence(XRF)analysis,Fourier transform infrared spectra(FT-IR),elemental mapping,and energy-dispersion Xray(EDXA).The phosphorescent woods show changes in color from colorless to green under ultraviolet(UV)irradiation,and to yellowish-green in the dark,as proved by the colorimetric parameters of the CIE Lab system.The afterglow wood samples display an absorbance band at 365 nm and two phosphorescent bands at 431 and 520 nm.Improved UV shielding,photostability,and hydrophobicity were explored.With increasing REDA ratio,both static contact and slide angles are found to improve in the ranges of147.6°-163.6°and 9°-14°,respectively.The long-lasting photoluminescence is optimized at a REDA ratio of 8%.The present strategy shows a large-scale production approach of multiple functional woods for many potential applications,such as smart glow in the dark windows and safety signs.

关 键 词：Translucent wood Rare-earth doped aluminate SUPERHYDROPHOBIC Long-lasting light emission Ultraviolet protection 

分 类 号：TB332[一般工业技术—材料科学与工程]