TY - JOUR AU - 김진웅 DA - 2013/10 PY - 2013 UR - https://ac.els-cdn.com/S003238611300743X/1-s2.0-S003238611300743X-main.pdf?_tid=203c5d80-93be-471a-a697-b8804c5df23d&acdnat=1520502450_2f6b16ed38ff5ca80b61185e236c5995 UR - http://hdl.handle.net/20.500.11754/44579 AB - This study introduces a synthetic method to graft zwitterionic poly (2-methacryroyloxyethyl phosphoryl choline) brushes onto TiO2 nanoparticles with thickness of a few nanometers. The grafting of zwitterionic polymer brushes was characterized by electron microscope measurements, zeta-potential analysis, and thermo-gravimetric analysis. The technique we employed to synthesize those hybrid nanoparticles was a modified seeded emulsion polymerization in which the polymerization loci were changed in the stage of radical initiation and chain propagation. We have found that the polymerization loci should be on the surface for achieving the effective grafting of polymer brushes. From the suspension rheology studies, we have observed that the suspension of our hybrid nanoparticles was dominated by the attractive force as well as by packing volume effect. This unique rheological behavior is expected to be useful for understanding the inter-particle interactions in complex formulations. (C) 2013 Elsevier Ltd. All rights reserved. PB - Elsevier Science B.V., Amsterdam. KW - Zwitterionic brushes KW - Polymerization loci KW - Suspension rheology KW - LIVING RADICAL POLYMERIZATION KW - FRAGMENTATION CHAIN TRANSFER KW - METHYL-METHACRYLATE KW - RAFT POLYMERIZATION KW - COPOLYMERS KW - PARTICLES KW - STYRENE KW - BLOCK KW - WATER TI - Synthesis and characterization of TiO2 nanoparticles chemically coated with zwitterionic polymer brushes IS - 21 VL - 54 DO - 10.1016/j.polymer.2013.08.003 T2 - POLYMER ER -