title: Encapsulation of TiO2 nanoparticles with poly(4-vinylpyridine) using surface functionalized thiol-lactam initiated radical polymerization.
abstract: A nanocomposite of TiO2 nanoparticle with an electroactive poly(4-vinylpyridine) (PVP) was synthesized via a simple surface thiol-lactam initiated radical polymerization upon grafting from protocol. This can be achieved through the primary modification of the TiO2 surface with a silane coupling agent leading to thiol functionalized TiO2 (TiO2-SH). Subsequently, a controlled radical polymerization of 4-vinylpyridine in the presence of TiO2-SH and butyrolactam afforded PVP-g-TiO2 nanocomposites. The grafting of PVP on the surface of TiO2 was confirmed by FT-IR, TGA, XPS, EDX, TEM and SEM analyses. The UV-vis studies of the synthesized PVP-g-TiO2 nanocomposite demonstrated an exceptionally good dispersibility in organic solvents.
authors.affiliation: Department of Imaging System Engineering, Pukyong National University, Busan 608-737, Korea.
authors.forename: Md Rafiqul
authors.initials: MR
authors.lastname: Islam
authors.forename: Long Giang
authors.initials: LG
authors.lastname: Bach
authors.forename: Jung Hyun
authors.initials: JH
authors.lastname: Jeong
authors.forename: Hyun Gyu
authors.initials: HG
authors.lastname: Kim
authors.forename: Kwon Taek
authors.initials: KT
authors.lastname: Lim
mesh_terms: D003460:Crystallization / Q000379:methods*; D005609:Free Radicals; D007769:Lactams / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D053769:Nanocapsules / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry*; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D005609:Free Radicals; D007769:Lactams; D046911:Macromolecular Substances; D053769:Nanocapsules; D011108:Polymers; D011145:Polyvinyls; D013438:Sulfhydryl Compounds; C009495:titanium dioxide; C019535:poly(4-vinylpyridine); D014025:Titanium