title: Multicompartment micelles from hyperbranched star-block copolymers containing polycations and fluoropolymer segment.
abstract: In this Article, we have investigated the self-assembly of a series of amphiphilic hyperbranched star-block copolymers to form multicompartment micelles in acidic aqueous solution (pH 3.0) or in a dimethylformamide/water (pH 3.0) mixture. These hyperbranched star-block copolymers were prepared via oxyanion-initiated polymerization process, using hydroxyl-terminated hyperbranched poly[3-ethyl-3-(hydroxymethyl)oxetane] (HP) as a macroinitiator precursor with multi-reactive sites. It was turned into oxyanion end-capped macroinitiator through the reaction with potassium hydride, and followed by a sequential addition of 2-(N,N-dimethylamino)ethyl methacrylate (DMAEMA) and 2,2,3,3,4,4,5,5-octafluoropentyl methacrylate (OFPMA). The resultant HP-star-PDMAEMA-b-POFPMA copolymers were characterized via 1H NMR, 19F NMR, and gel permeation chromatography (GPC). The analyses of transmission electron microscopy (TEM), dynamic light scattering (DLS), and microelectrophoresis confirmed that these copolymers could directly self-organize into supramolecular multicompartment micelles with different diameters, depending on the length of the PDMAEMA segment, which can be protonated in acidic aqueous medium. The measurement of the zeta potential gave further evidence of the aggregating structures for the multicompartment micelles.
authors: The Key Laboratory of Organic Chemistry of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, Suzhou 215123, China.
authors: Jiang
authors: J
authors: Mao
authors: Peihong
authors: P
authors: Ni
authors: Yiyong
authors: Y
authors: Mai
authors: Deyue
authors: D
authors: Yan
mesh_terms: D003102:Colloids / Q000737:chemistry; D005465:Fluorocarbon Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D008823:Micelles; D015394:Molecular Structure; D010316:Particle Size; D011073:Polyamines / Q000138:chemical synthesis / Q000737:chemistry*; D000071228:Polyelectrolytes; D012996:Solutions / Q000737:chemistry; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D003102:Colloids; D005465:Fluorocarbon Polymers; D008823:Micelles; D011073:Polyamines; D000071228:Polyelectrolytes; D012996:Solutions; D014867:Water