pH-Sensitive Vesicles Based on a Biocompatible ...

AbstractHighly biocompatible pH-sensitive diblock copolymer vesicles were prepared from the self-assembly of a biocompatible zwitterionic copolymer, poly[2-(methacryloyloxy)ethyl phosphorylcholine-block-2-(diisopropylamino)ethyl methacrylate], PMPC-b-PDPA. Vesicle formation occurred spontaneously by adjusting the solution pH from pH 2 to above 6, with the hydrophobic PDPA chains formi...[详细]

2005-12-01

pH-Responsive Vesicles Based on a Hydrolyticall...

AbstractA new type of shape-persistent, pH-responsive vesicle was prepared by the self-assembly of a novel poly(ethylene oxide)-block-poly[2-(diethylamino)ethyl methacrylate-stat-3-(trimethoxysilyl)propyl methacrylate], PEO-b-P(DEA-stat-TMSPMA), copolymer. Vesicles were formed spontaneously in aqueous THF solution, with the hydrophilic PEO chains forming the corona and the pH-s...[详细]

2005-08-24

Hairy Nanospheres by Gelation of Reactive Block...

Abstract A novel way to prepare polymer hair/polysilsesquioxane core hybrid nanospheres is presented based on a self-assembly and gelation process of a reactive block copolymer, poly(ethylene oxide)-block-poly[3-(trimethoxysilyl)propyl methacrylate] (PEO113-b-PTMSPMA206). Nanospheres of uniform size were obtained. Transmission electron microscopy (TEM), dynamic light scattering (DLS),...[详细]

2005-03-17

Organic–Inorganic Hybrid Nanoparticles with a ...

AbstractSecret chambers: Organic–inorganic hybrid nanoparticles (see picture) with a complex hollow structure were prepared by the self-assembly of a reactive block copolymer, poly(ethylene oxide)-block-poly[3-(trimethoxysilyl)propyl methacrylate], in DMF/water. Within these hybrid large-compound vesicles, several cavities are separated by crosslinked hybrid bilayers of uniform...[详细]

2004-09-03

Atom-Transfer Radical Polymerization of a React...

Abstract Atom-transfer radical polymerizations (ATRPs) of a reactive monomer, 3-(trimethoxysilyl)propyl methacrylate (TMSPMA), mediated by CuBr/N,N,N‘,N‘ ‘,N‘ ‘-pentamethyldiethylenetriamine (PMDETA) in anisole have been studied using ethyl 2-bromoisobutyrate (2-EBiB) and poly(ethylene oxide) methyl ether 2-bromoisobutyrate (PEO-Br) as initiators. In general, the polymerizations of T...[详细]

2004-07-30

Preparation of Organic/Inorganic Hybrid Hollow ...

AbstractIn a previous communication, we have reported the study of novel organic/inorganic hollow particles based on a reactive amphiphilic diblock copolymer, poly(ethylene oxide)-block-poly[3-(trimethoxysilyl)propyl methacrylate] (PEO-b-PTMSPMA). The preparation of these novel particles involved the preformed vesicles of the block copolymers in a methanol/water solvent mixture, follo...[详细]

2004-06-19

PCL Star Polymer, PCL-PS Heteroarm Star Polymer...

AbstractPoly(ε-caprolactone) (PCL) star polymer with a cross-linked microgel core was synthesized by atom-transfer radical polymerization (ATRP) of divinylbenzene (DVB) using mono-2-bromoisobutyryl PCL ester as a macroinitiator. Then poly(ε-caprolactone)-polystyrene (PCL-PS) heteroarm star polymer was produced subsequently by grafting PS from the core of PCL star polymer...[详细]

2004-04-15

Preparation of poly(ethylene oxide) star polyme...

AbstractPoly(ethylene oxide) (PEO) star polymer with a microgel core was prepared by atom transfer radical poylmerization (ATRP) of divinyl benzene (DVB) with mono-2-bromoisobutyryl PEO ester as a macroinitiator. Several factors, such as the feed ratio of DVB to the initiator, type of catalysts, and purity of DVB, play important roles during star formation. The crosslinked poly(diviny...[详细]

2004-03-25

Organic/Inorganic Hybrid Vesicles Based on A Re...

AbstractPresented in this communication is a novel hybrid vesicle with a cross-linked polyorganosiloxane wall based on a new reactive block copolymer, poly(ethylene oxide)-block-poly(3-(trimethoxysilyl)propyl methacrylate) (PEO-b-PTMSPMA), which was synthesized by atom transfer radical polymerization. The vesicles were prepared first by self-assembly of the block copolymer in a ...[详细]

2003-11-08