Ultrasonically assisted in situ emulsion polymerization: a facile approach to prepare conducting copolymer/silica nanocomposites
- Ultrasonically assisted in situ emulsion polymerization: a facile approach to prepare conducting copolymer/silica nanocomposites
- 심재진; 할도리유바라즈; 팜쿠앙롱[팜쿠앙롱]; 노석균; 류원석
- POLYPYRROLE-SILICA NANOCOMPOSITES; CORE-SHELL STRUCTURE; PHENYLENEDIAMINE COPOLYMERS; POLYANILINE; COMPOSITE; POLYMERS; OXIDE; NANOPARTICLES; PARTICLES; NANOTUBES
- Issue Date
- POLYMERS FOR ADVANCED TECHNOLOGIES, v.22, no.6, pp.781 - 787
- Ultrasonically assisted in situ emulsion polymerization was used to prepare electrically conducting copolymer poly(aniline-co-p-phenylenediamine) [poly(Ani-co-pPD)] and silica (SiO(2)) nancomposites. This approach can solve problems in the dispersion and stabilization of SiO(2) nanoparticles in the copolymer matrix. It was found that the aggregation of SiO(2) nanoparticles could be reduced under ultrasonic irradiation. Scanning transmission electron microscopy (STEM) confirmed that the resulting poly(Ani-co-pPD)/SiO(2) nanocomposite particles were spherical in shape, in which SiO(2) nanoparticles were well dispersed. The comonomer molecules were absorbed on the surface of SiO(2) particles and then polymerized to form core-shell nanocomposite. The incorporation of SiO(2) 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 (C) 2009 John Wiley & Sons, Ltd.
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