华南理工大学学报(自然科学版) ›› 2017, Vol. 45 ›› Issue (11): 48-56.doi: 10.3969/j.issn.1000-565X.2017.11.007

• 材料科学与技术 • 上一篇    下一篇

含羧基纤维素衍生物/稀土金属离子纳米复合物的性质

叶君1 刘惠铭1 熊犍2†   

  1. 1. 华南理工大学 制浆造纸工程国家重点实验室,广东 广州 510640; 2. 华南理工大学 食品科学与工程学院,广东 广州 510640
  • 收稿日期:2017-03-10 修回日期:2017-04-26 出版日期:2017-11-25 发布日期:2017-10-01
  • 通信作者: 熊犍(1965-),男,博士,教授,主要从事纤维素及其他天然高分子的结构与性能研究. E-mail:lcjxiong@scut.edu.cn
  • 作者简介:叶君(1963-),女,博士,教授,主要从事植物资源化学研究. E-mail:jye@scut.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(31270617);制浆造纸工程国家重点实验室资助项目(2016C12)

Properties of Carboxyl-Containing Cellulose Derivatives/Rare Earth Ions Nanocomposites

YE Jun1 LIU Hui-ming1 XIONG Jian2   

  1. 1.State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guanghzou 510640,Guangdong,China; 2.School of Food Science and Engineering,South China University of Technology,Guanghzou 510640,Guangdong,China
  • Received:2017-03-10 Revised:2017-04-26 Online:2017-11-25 Published:2017-10-01
  • Contact: 熊犍(1965-),男,博士,教授,主要从事纤维素及其他天然高分子的结构与性能研究. E-mail:lcjxiong@scut.edu.cn
  • About author:叶君(1963-),女,博士,教授,主要从事植物资源化学研究. E-mail:jye@scut.edu.cn
  • Supported by:
     Supported by the National Natural Science Foundation of China(31270617)

摘要: 制备了 CMC/Eu(Ⅲ)、CMC/Tb(Ⅲ)、HPCMC/Eu(Ⅲ)、HPCMC/Tb(Ⅲ)纳米复 合物,通过 XPS、UV-Vis、流变学检测及 TG-DSC 研究了产物的“天线效应”、荧光性质、静 态/动态流变性质以及热性质. XPS 结果表明,Eu3+ 、Tb3+ 与 CMC、HPCMC 均生成 Ln(Ⅲ)—O,而且产物的紫外吸收与其激发光谱有重叠,证明纤维素衍生物所吸收的能量 可以成功地转移到稀土金属,使之发光;流变学性能研究结果表明,前述 4 种纳米复合物 溶液均为假塑性流体,黏流活化能分别为 1. 5964、2. 5193、1. 6047 和 1. 4218kJ/mol,其黏 度对温度具有依赖性;溶液的储能模量和损耗模量均随角频率的增大而增大;纳米复合物 与 CMC-Na、HPCMC-Na 有相似的热性质,且 HPCMC 侧链更易与水通过氢键结合.

关键词: 稀土发光材料, 纳米复合物, 天线效应, 流变, 荧光

Abstract: CMC/Eu(Ⅲ),CMC/Tb(Ⅲ),HPCMC/Eu(Ⅲ),HPCMC/Tb(Ⅲ) nanocomplexes were prepared,and the “antenna effect”,fluorescence properties,static and dynamic rheological properties and thermal properties of the products were investigated by means of XPS,UV-Vis,rheological detection and TG-DSC.XPS results show that Ln(Ⅲ)—O is formed in all the products of Eu3+ and Tb3+ reacting with CMC and HPCMC,and the UV ab- sorption of the products overlaps its excitation spectrum,which proves that the energy absorbed by cellulose deriva- tives can be successfully transferred to a rare earth metal to make it light.The results of the rheological properties of the nanocomplexes show that the solutions of all nanocomplexes are pseudo-complex,and the flow activation energy of the four kinds of nanocomplexes are 1. 5964,2. 5193,1. 6047 and 1. 4218kJ/mol respectively,suggesting that the viscosity is dependent on temperature.In addition,the storage modulus and loss modulus of the solution grow up with an increase of the angular frequency; the thermal properties of the nanocomplexes are similar to those of CMC-Na and HPCMC-Na,and the side chains on HPCMC are more readily associated with water through hydrogen bonding.

Key words: rare earth luminescent materials, nanocomplexes, antenna effect, rheology, fluorescence