Ultrasonically assisted in situ emulsion polymerization: a facile approach to prepare conducting copolymer/silica nanocomposites |
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| Authors: | Yuvaraj Haldorai Pham Quang Long Seok Kyun Noh Won Seok Lyoo Jae‐Jin Shim |
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| Institution: | 1. School of Display and Chemical Engineering, Yeungnam University, Gyeongbuk 712‐749, Korea;2. School of Textiles, Yeungnam University, Gyeongbuk 712‐749, Korea |
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| Abstract: | Ultrasonically assisted in situ emulsion polymerization was used to prepare electrically conducting copolymer poly(aniline‐co‐p‐phenylenediamine) poly(Ani‐co‐pPD)] and silica (SiO2) nancomposites. This approach can solve problems in the dispersion and stabilization of SiO2 nanoparticles in the copolymer matrix. It was found that the aggregation of SiO2 nanoparticles could be reduced under ultrasonic irradiation. Scanning transmission electron microscopy (STEM) confirmed that the resulting poly(Ani‐co‐pPD)/SiO2 nanocomposite particles were spherical in shape, in which SiO2 nanoparticles were well dispersed. The comonomer molecules were absorbed on the surface of SiO2 particles and then polymerized to form core–shell nanocomposite. The incorporation of SiO2 in the nanocomposite was supported by Fourier transform infrared spectroscopy (FT‐IR). UV‐visible spectra of the diluted colloid dispersion of nanocomposite particles were similar to those of the neat copolymer. Conductivity of nanocomposites was higher than the value obtained for the neat copolymer. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | conducting copolymer emulsion polymerization silica sodium dodecyl sulphate ultrasonic irradiation |
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