Citation: Jiang-ru Zhang, Teng Qiu, Hong-fu Yuan, Xiao-yu Li. THE SYNTHESIS OF Ag-POLYPYRROLE NANOCOMPOSITE COATED LATEX PARTICLES AND THEIR APPLICATION AS A FLUORESCENT QUENCHING AGENT[J]. Chinese Journal of Polymer Science, ;2013, 31(3): 434-443. doi: 10.1007/s10118-013-1229-4 shu

THE SYNTHESIS OF Ag-POLYPYRROLE NANOCOMPOSITE COATED LATEX PARTICLES AND THEIR APPLICATION AS A FLUORESCENT QUENCHING AGENT

Received Date: 8 May 2012
Revised Date: 13 June 2012

Fund Project: The work was financially supported by the National Natural Science Foundation of China (Nos. 50673008, 50703002) and the Fundamental Research Funds for the Central Universities (No. JD1108).

Submicron-sized Ag-polypyrrole/poly(styrene-co-methacrylic acid) (Ag-PPy/P(St-co-MAA)) composite particles were fabricated via a redox reaction between pyrrole and AgNO3 in the presence of P(St-co-MAA) soap-free latex. The products are characterized by transmission electron microscopy (TEM), electron diffraction spectra (EDS), Raman spectra, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The results showed that Ag-PPy nanocomposites were in situ deposited onto the surface of P(St-co-MAA) latex particles tailored by carboxylic-acid groups. The nanocomposites of Ag-PPy distributed on the surface of polymer particles transformed from discretely dots to continuously coating as the reaction temperature increased from 15℃ to 60℃. Strawberry-like composite particles were obtained at the reaction temperature of 60℃. The TGA characterization confirmed that the Ag-PPy nanocomposites loading onto the P(St-co-MAA) particles were systematically controlled over a range of 6 wt%-42 wt% by changing the reaction temperatures. The fluorescence quenching effect of the Ag-PPy/P(St-co-MAA) composite particles was explored on Rhodamine B as a model molecule with the Stern-Vlmer quenching constant KSV of 5.9104 (g/mL)-1. It is suggested that the fluorescence quenching effect is caused by the resonance energy transfer mechanism.
- Nanocomposite-coated latex particles
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