title: Hollow capsules prepared from all block copolymer micelle multilayers.
abstract: We introduce a novel and versatile approach for preparing hollow multilayer capsules containing functional hydrophobic components. Protonated polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) and anionic polystyrene-block-poly(acrylic acid) (PS-b-PAA) block copolymer micelles (BCM) were used as building blocks for the layer-by-layer assembly of BCM multilayer films onto polystyrene (PS) colloids. After removing the PS colloids, the stabilities of the formed BCM hollow capsules were found to be strongly dependent on the charge density of the hydrophilic corona segments (i.e., P4VP and PAA block segments) as well as the relative molecular weight ratio of hydrophobic core (i.e., PS segments) blocks and hydrophilic corona shells. Furthermore, in the case of incorporating hydrophobic fluorescent dyes into the PS core blocks of micelles, the hairy/hairy BCM multilayers showed well-defined fluorescent images after colloidal template removal process. These phenomena are mainly caused by the relatively high degree of electrostatic interdigitation between the protonated and anionic corona block shells.
authors: Intelligent Hybrids Research Center, School of Chemical and Biological Engineering, The WCU Program of Chemical Convergence for Energy & Environment, Seoul National University, Seoul 151-744, Republic of Korea.
authors: Jinkee
authors: J
authors: Hong
authors: Jinhan
authors: J
authors: Cho
authors: Kookheon
authors: K
authors: Char
mesh_terms: D000179:Acrylates / Q000138:chemical synthesis* / Q000737:chemistry; D003102:Colloids / Q000138:chemical synthesis / Q000737:chemistry; D008567:Membranes, Artificial; D008823:Micelles; D010316:Particle Size; D011137:Polystyrenes / Q000138:chemical synthesis* / Q000737:chemistry; D011145:Polyvinyls / Q000138:chemical synthesis* / Q000737:chemistry; D016062:Porosity; D011725:Pyridines / Q000138:chemical synthesis* / Q000737:chemistry; D013499:Surface Properties
chemical_list: D000179:Acrylates; D003102:Colloids; D008567:Membranes, Artificial; D008823:Micelles; D011137:Polystyrenes; D011145:Polyvinyls; D011725:Pyridines; C509855:poly(styrene-b-acrylic acid); C509607:polystyrene-block-poly(4-vinylpyridine)