CMC/Eu nanocomposites were synthesized successfully by reacting with Eu3+ and CMC(70?, pH 7.0) in waterbath. The FTIR results indicated the reaction between carboxyl groups in CMC and Eu3+, and SEM results showed that the particles of CMC/Eu nanocomposites were well-distributed and particle sizes were around 100 nm. In addition, effect of reaction time on the fluorescence properties of CMC/Eu nanocomposites was complicated(see Figure). The emission spectra had blue shifts with increasing reaction time. The fluorescence intensities of the materials in longer reaction time(35 and 45min) were significantly stronger than that of materials in shorter reaction time(15 and 25min). It might result from the adequate reaction between CMC and Eu3+.Acknowledgement: Supported by the National 973 project under Grant No. 2010CB732201, the National Natural Foundation of China under Grant No. 31270617 and the Opening Project of State Key Laboratory of Polymer Materials Engineering (Sichuan University) under Grant No. KF201301.Figure.  Emission spectra of CMC/Eu nanocomposites synthesized in different reaction time

Fluorescence properties of CMC/Eu nanocomposites in different reaction time

247th National Meeting (2014)

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