Synthesis and characterization of AgBr nanocomposites by templated amphiphilic comb polymer

• Published in: Journal of colloid and interface science 2009-10, Vol.338 (2), p.486-490
• Main Authors: Koh, Joo Hwan, Seo, Jin Ah, Park, Jung Tae, Kim, Jong Hak
• Format: Article
• Language: English
• Subjects: Atom transfer radical polymerization (ATRP); Bromides - chemical synthesis; Bromides - chemistry; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Graft copolymer; Graft copolymers; Molecular Structure; Nano patterning; Nanocomposites; Nanoparticle; Nanoparticles; Nanoparticles - chemistry; Nuclear magnetic resonance; Particle Size; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Polymerization; Polyvinyls - chemical synthesis; Polyvinyls - chemistry; Pyridines; Silver; Silver Compounds - chemical synthesis; Silver Compounds - chemistry; Surface physical chemistry; Surface Properties; Transmission electron microscopy; Wavenumber
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2009.07.010

A novel amphiphilic graft copolymer, i.e. poly(vinylidene fluoride- co-chlorotrifluoroethylene)- g-poly(4-vinyl pyridine) (P(VDF- co-CTFE)- g-P4VP) was synthesized via atom transfer radical polymerization (ATRP) and silver halide nanoparticles were in situ generated within the graft copolymer. A novel amphiphilic graft copolymer, poly(vinylidene fluoride- co-chlorotrifluoroethylene)- g-poly(4-vinyl pyridine) (P(VDF- co-CTFE)- g-P4VP) at 65:35 wt.%, respectively, was synthesized via atom transfer radical polymerization (ATRP), as confirmed by nuclear magnetic resonance ( 1H NMR) and transmission electron microscopy (TEM). Silver bromide (AgBr) nanoparticles were in situ generated within the self-assembled P(VDF- co-CTFE)- g-P4VP graft copolymer. TEM, UV–visible spectroscopy and X-ray diffraction (XRD) analyses support the successful formation of P(VDF- co-CTFE)- g-P4VP nanocomposites consisting of stabilized AgBr nanoparticles mostly 20–40 nm in size, which is presumably due to the capping action of the coordinating pyridine groups of the graft copolymer. The wavenumber of pyridine nitrogen in FT-IR spectra and the glass transition temperature ( T g) of the graft polymer measured by DSC shifted upon the formation of AgBr nanoparticles, indicating specific interactions between the nanoparticles and the graft copolymer matrix.