纤维状中空结构NaYF_(4):Yb^(3+),Er^(3+)上转换材料的合成及防伪应用  

Synthesis of NaYF_(4):Yb^(3+),Er^(3+) Upconversion Material with Fibrous Hollow Structure for Anti-Counterfeiting Application

作　　者：王辉 宋娅 童超 杜晶晶[1] WANG Hui;SONG Ya;TONG Chao;DU Jingjing(College of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学包装与材料工程学院,湖南株洲412007

出　　处：《包装学报》2021年第2期46-53,共8页Packaging Journal

摘　　要：采用水溶性聚合物聚乙烯亚胺(PEI)调介下的水热法,一步合成了具有纤维状中空结构的六方相NaYF4:Yb^(3+),Er^(3+)上转换荧光材料,并将其作为荧光填料,通过流延成膜法制备了具有上转换荧光性能的壳聚糖/聚乙烯醇(CS/PVA)荧光复合薄膜。探究了PEI配体含量和反应体系pH值对合成的上转换材料的形貌、晶型和荧光性能的影响,以及壳聚糖/聚乙烯醇荧光复合薄膜中荧光填料的最佳掺杂量。研究结果表明,在PEI含量为0.3 g且反应体系pH=5的条件下,合成的产物为具有纤维状中空结构的六方相NaYF4:Yb^(3+),Er^(3+)。荧光光谱表明,合成的NaYF4:Yb^(3+),Er^(3+)上转换材料在980 nm激光激发下具有优异的荧光性能。当荧光填料的掺杂质量分数为3.0%时,制备的NaYF4:Yb^(3+),Er^(3+)/(CS/PVA)荧光复合薄膜具有最佳的透明度和上转换荧光特性。The hexagonal NaYF_(4):Yb^(3+),Er^(3+) upconversion fluorescent materials with fibrous hollow structure were synthetized by one-pot hydrothermal method with water-soluble poly(ethylene imine)(PEI)as ligand.The as-prepared NaYF_(4):Yb^(3+),Er^(3+) upconversion materials were used as fillers which incorporated into chitosan/polyvinyl alcohol(CS/PVA)matrix to develop a novel luminescent composite film.The effects of PEI ligand amounts and pH values of reaction system on the crystal phase,morphology and fluorescent properties were investigated in detail.The doping concentration of NaYF_(4):Yb^(3+),Er^(3+) filler in CS/PVA fluorescent composite film was also optimized.It was found that the resulting hexagonal NaYF_(4):Yb^(3+),Er^(3+) upconversion materials possessed fibrous hollow structure and exhibited excellent upconversion luminescence under 980 nm laser excitation when the PEI contents was 0.3 g at pH=5.When the doping mass fraction of the fluorescent filler was 3.0%,the prepared NaYF_(4):Yb^(3+),Er^(3+)/(CS/PVA)fluorescent composite film had the best transparency and up-conversion fluorescent properties.

关 键 词：纤维状中空结构 NaYF_(4):Yb^(3+) Er^(3+) 上转换荧光 聚乙烯亚胺 壳聚糖/聚乙烯醇 

分 类 号：O734[理学—晶体学]