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Stimuli-Induced Core-Corona Inversion of Micelles of Water Soluble Poly(sodium styrene sulfonate)-b-Poly(N-isopropyl acrylamide) in Response to Metal-Ion and Temperature

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We investigated schizophrenic micelle formation of poly(sodium styrene sulfonate)-b-poly(N-isopropyl acrylamide) (PSSNa-b-PNIPAM) in aqueous solutions by using Fe3+ ion and temperature as stimuli. PSS-core micelles are formed by insolubilizing the PSS block with Fe3+ ion, which collapses after removing Fe3+ ion with ethylene diamine-N,N,N,N-tetra acetic acid disodium salt dehydrate (EDTA/2Na). On the other side, PNIPAM-core micelles are formed by increasing temperature above lower critical solution temperature (LCST) of the PNIPAM block, which collapses by decreasing temperature below the LCST. The stimuli-responsive properties of the diblock copolymer were extensively investigated by dynamic light scattering, turbidity measurements, scanning electron microscopy, and ζ-potential measurements.
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Keywords: DIBLOCK COPOLYMER; FE3+; LOWER CRITICAL SOLUTION TEMPERATURE; POLY(N-ISOPROPYL ACRYLAMIDE); POLY(SODIUM STYRENE SULFONATE); SCHIZOPHRENIC MICELLE; STIMULI-RESPONSIVENESS

Document Type: Research Article

Publication date: June 1, 2014

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  • Journal of Colloid Science and Biotechnology is an international multidisciplinary peer- reviewed journal covering all aspects of colloid science including colloids preparation, characterization, structure-property relationships, spectroscopy, chemical and physical properties and applications of colloids in biotechnology, medicine and pharmaceuticals. This journal deals with interdisciplinary research areas of chemistry, physics, biology, materials science, polymer science, nanotechnology covering all topics related to colloids such as latexes, emulsions, suspensions, micellar systems, gels, composites, hybrids, surfactants, aerosols, foams, minerals, soft matter, microfluidics, encapsulation processes of active molecules, biomolecules, surfacial and interfacial processes, catalysis, electrochemistry, theoretical aspects, computer simulations and colloids in biotechnology and medicine.
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