pH值对硅烷偶联剂表面改性稀土长余辉发光材料的影响  

Effects of pH on Surface Modification of Long Afterglow Phosphors by Silane Coupling Agent

作　　者：郭斌[1] 徐杰[1] 陈泳[1] 李本刚[1] 曹绪芝[1] 高勇[2] 郭福全[3] 

机构地区：[1]南京林业大学理学院化学与材料系,江苏南京210037 [2]福建师范大学化学与材料学院,福建福州350007 [3]洛阳理工学院材料科学与工程系,河南洛阳471023

出　　处：《中国稀土学报》2011年第5期589-592,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(20904022;20904021);江苏省高校自然科学研究计划(08KJB430008);2006年度江苏省"青蓝工程"优秀青年骨干教师项目;南京大学固体微结构物理国家重点实验室开放课题(M05003)资助

摘　　要：为提高稀土长余辉发光材料SrMgAl4O8:Eu2+,Dy3+在非极性树脂中的分散性和相容性,用硅烷偶联剂YDH-570在强酸条件下对其进行了表面改性。通过质量变化、比表面积、ATR-FTIR、SEM(能谱分析)和发光性能分别研究了该条件下不同pH值改性对材料表面组成、形貌和性能的影响。结果发现:强酸条件下改性效果十分显著;当pH值由0.6增加到0.72时,样品增重率达23.3%,33.3%,53.3%,比表面积净增75.6%,215.2%,265.4%;对于改性效果较明显的pH为0.72的样品,能谱分析证实是一种片状有机包覆层结构;余辉衰减曲线表明,表面改性对材料发光性能影响不大。In order to enhance the dispersity and compatibility in organic resin, silane coupling agent YDH- 570 was applied to modify the long afterglow phosphors SrMgA140s ： Eu2 ＋ , Dy3 ＋ at strong acid medium. The quality change, BET, ATR-FTIR, and SEM （energy spectrum analysis） were performed to characterize the phosphors before and after modification at different pH. The results showed that the modification was obvious, and the quality of samples increased 23.3% , 33.3%, 53.3% individually when the pH increased from 0：6 to 0.72, and their specific surface area also increased 75.6%, 215.2% , 265.4%. The energy spectrum analysis confirmed that an organic coating on phosphors occurred at pH = 0.72. The fluorescence intensity decay curves showed that their luminous property did not changed a lot.

关 键 词：长余辉发光材料 表面改性 硅烷偶联剂 稀土 

分 类 号：TN104.3[电子电信—物理电子学]