Abstract
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°C to 60°C. Strawberry-like composite particles were obtained at the reaction temperature of 60°C. 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-Völmer quenching constant K SV of 5.9 × 104 (g/mL)−1. It is suggested that the fluorescence quenching effect is caused by the resonance energy transfer mechanism.
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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).
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Zhang, Jr., Qiu, T., Yuan, Hf. et al. The synthesis of Ag-polypyrrole nanocomposite coated latex particles and their application as a fluorescent quenching agent. Chin J Polym Sci 31, 434–443 (2013). https://doi.org/10.1007/s10118-013-1229-4
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DOI: https://doi.org/10.1007/s10118-013-1229-4