原位聚合法制备水溶性高聚物修饰的NaYF4：Yb,Er  

Preparation of NaYF4：Yb,Er Nanoparticles Modified with Water-soluble Polymers Using in-situ Polymerization Approach

作　　者：李勰[1] 周兴平[2] 王夏琴[1] 庄福君 

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学化学化工与生物工程学院,上海201620 [3]上海保信化学有限公司,上海201620

出　　处：《纳米科技》2011年第1期56-61,65,共7页

基　　金：上海市自然科学基金项目（10ZR1400600）

摘　　要：采用原位聚合法,以聚丙烯酸（PAA）和聚乙烯吡咯烷酮（PVP）为壳层材料,对NaYF4上转换发光材料表面进行了PAA和PVP的修饰,傅立叶红外吸收光谱和热重分析证明了NaYF4纳米粒子表面有PAA和PVP的存在,透射电镜显示,当反应温度在0℃,丙烯酸单体含量为8.0wt%,反应时间130min时,PAA修饰的纳米粒子微观形貌最佳;当反应温度在60℃,乙烯基吡咯烷酮单体含量在12.0wt%,反应时间在150min的条件下,PVP修饰的纳米粒子微观形貌最佳。上转换荧光测试结果证明,在对材料进行NaYF4无机壳层包覆后再进行水溶性高聚物修饰,能够使其荧光性能保持不变。The NaYF4 up-conversion phosphors were successfully modified with PAA and PVP by in-situ polymerization. The existence of PAA and PVP on the surface of NaYF4 was proved by FI-IR and TAG. TEM images showed that the PAA coated uniform nanoparticles were obtained with 8.0 wt.% acrylic acid content （the content percentage in the whole reaction system） at 0℃ within 130 min, and the PVP coated uniform nanoparticles were obtained with 12.0 wt.% vinyl-pyrrolidone content at 60℃ within 150 min. Fluorescence tests showed that the coating of material with analogous NaYF4 of before polymer modifying can keep fluorescence property.

关 键 词：上转换发光材料 原位聚合 表面修饰 聚丙烯酸 聚乙烯吡咯烷酮 

分 类 号：TB34[一般工业技术—材料科学与工程] O613.33[理学—无机化学]