Journal
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume 48, Issue 10, Pages 2170-2177Publisher
WILEY
DOI: 10.1002/pola.23986
Keywords
cadmium sulfide; frontal polymerization; photoluminescence; poly(N-methylolacrylamide); QD-polymer nanocomposites; radical polymerization; synthesis
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Funding
- National Natural Science Foundations (NSFs) of China [20606016, 10676013 NASA, 10976012 NASA]
- 863 Important National Science and Technology Specific Project [2007AA06A402]
- Natural Science Foundation for Jiangsu Higher Education Institutions of China [07KJA53009, 09KJB530005]
- Ph.D. Program Foundation of Ministry of Education of China [20093221120002]
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We report an available approach for quickly fabricating CdS QD-polymer nanocomposites via frontal polymerization (FP). First, we synthesized (3-mercaptopropyl)-1-trimethoxysilane (MPS)-capped CdS quantum dots (QDs). With these MPS-capped CdS QDs containing mercapto groups, MPS-capped CdS QDs can be easily incorporated into a poly(N-methylolacrylamide) (PNMA) matrix via FP. A variety of features for preparing QD-polymer nanocomposites, such as initiator concentration and CdS concentration, were thoroughly investigated. The fluorescence properties of QD-polymer nanocomposites prepared via FP are comparatively investigated on the basis of ultraviolet-visible (UV-vis) spectra and photoluminescence (PL) spectra. Results show that the PL intensity of QD-polymer nanocomposites prepared via the FP method is superior to that obtained by the traditional batch polymerization (BP) method. In addition, by measuring the changes of PL intensity of the samples immersed in different concentrations of copper acetate solution, we found the QD-polymer nanocomposites can be ultrasensitive to copper ions. This FP process can be exploited as a facile and rapid way for synthesis QD-polymer nanocomposites on a large scale, avoiding the fluorescence quenching of nanocrystals during incorporation anocrystals into polymer matrices. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2170-2177, 2010
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