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- W3023962830 abstract "This article briefly describes some new approaches to stimuli-sensitive polymeric micelles and hollow spheres,which were developed in the authors' laboratory in recent years.(1)Self-assembly of component polymers via specific interactions to construct non-covalently connected micelles (NCCM).For example,in water,PCL and PAA formed core-shell particles driven by interpolymer hydrogen bonding.After crosslinking the PAA shell and removing the PCL core,“nanocages”made of PAA network were obtained. This hollow structure shows perfect reversible size-pH dependence.(2)Simultaneous in-situ polymerization of monomers and self-assembly of the polymers.In this approach,PNIPAM network were formed by radical polymerization covering PCL particles.Hollow spheres of PNIPAM network was then obtained by biodegradation of the PCL core.Both the core-shell spheres and hollow spheres show reversible size dependence on temperature change because of PNIPAM undergoing phase transition around 32℃.(3)Complexation-induced micellization and transition between the micelles and hollow spheres.Graft copolymers of hydroxylethyl cellulose (HEC) and PAA were prepared by free radical polymerization.The copolymers showed pH dependent micellization,i.e.micelles formed when pH of the graft copolymer solution decreased to around 3.The micellar structure could be locked by crosslinking PAA grafts.The resultant cross-linked micelles undergo pH-dependent transition between the micelles and hollow sphere,which accompanies a remarkable particle size change.Both the micellization and the structure transition were found to be reversible and associated with H-bonding complexation between the main chain and grafts." @default.
- W3023962830 created "2020-05-13" @default.
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- W3023962830 date "2005-01-01" @default.
- W3023962830 modified "2023-09-25" @default.
- W3023962830 title "NEW APPROACHES TO STIMULI-RESPONSIVE POLYMERIC MICELLES AND HOLLOW SPHERES" @default.
- W3023962830 hasPublicationYear "2005" @default.
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