Author
Renliang Xu
Bio: Renliang Xu is an academic researcher from University of Toronto. The author has contributed to research in topics: Micelle & Adsorption. The author has an hindex of 8, co-authored 11 publications receiving 1744 citations.
Papers
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TL;DR: In this article, the concentration du copolymere de la variation des proprietes spectroscopiques du pyrene provoquee par son partage entre les phases micellaires et aqueuses permet de determiner les concentrations of critiques micellaire and les coefficients de partage.
Abstract: L'etude en fonction de la concentration du copolymere de la variation des proprietes spectroscopiques du pyrene provoquee par son partage entre les phases micellaires et aqueuses permet de determiner les concentrations critiques micellaires et les coefficients de partage
1,234 citations
TL;DR: In this paper, copolymeres bi-and trisequences forment en solution aqueuse des micelles spheriques de 2 types, which are constantes dans le domaine de concentration 2 •10 −5 −2•10 −3 g/ml.
Abstract: Des copolymeres bi- et trisequences forment en solution aqueuse des micelles spheriques de 2 types dont les dimensions respectives sont constantes dans le domaine de concentration 2•10 −5 −2•10 −3 g/ml. La fraction en masse des particules les plus grosses decroit quand la concentration augmente. Les petites particules (20 nm de rayon hydrodynamique) sont des micelles regulieres avec un nombre d'association de quelques centaines; les grosses particules (65 nm) sont des amas constitues de dizaines de micelles
323 citations
TL;DR: In this article, light scattering was used to obtain the aggregation number and core radii of PEO-PD micelles in the Noolandi-Hong mean density micelle model by using their equations to calculate the Flory-Huggins parameters.
Abstract: PS-PEO di- or triblock copolymer micelles of various compositions and molecular weights in waterwere investigated by light scattering. The hydrodynamic radius values for the micelles were in good accord with the scaling relationship of Halperin's star model. The star model was then incorporated into the data analysis to obtain the aggregation number and core radii. With these parameters the validity of the Noolandi-Hong mean density micelle model by using their equations to calculate the Flory-Huggins parameters for the interaction of PEO-water and PEO-PS.
142 citations
TL;DR: In this paper, the authors used the star models to explain the layer thickness of polystyrene-poly(ethylene oxide) (PS-PEO) diblock copolymer micelles in water and cyclopentane.
Abstract: The star models are briefly summarized and used to explain the layer thickness of the soluble block of polystyrene-poly(ethylene oxide) (PS-PEO) diblock copolymer micelles in water and cyclopentane. Both the discrete blob model (DB) and the distribution density (DD) model describe well the tethered layer of the soluble block. The structure and thickness of the adlayer formed by adsorption of the PS -PEO diblock copolymer micelles onto PS lattices is strongly dependent on the radius of the latex particle and the length of the PEO block. The star model is adequate for a latex of 32 nm radius and long PEO blocks (N = 445 and 480), but deviates for smaller PEO chains (N = 148), where the adlayer thickness is well predicted by the planar brush model. This planar brush model is still valid for a latex of 54 nm radius and the same PEO chain. For longer chains and/or larger lattices, neither model correctly predicts the adlayer thickness because of the disruption of the micelles during their adsorption process. This disruption results in the formation of loops and trains on the PS surface that make the subsequent adsorption of more micelles and the formation of a dense adlayer difficult.
28 citations
TL;DR: In this paper, size-exclusion chromatography experiments were conducted for aqueous solutions of polystyrene-poly-(ethylene oxide) (PS-PEO) diblock and triblock copolymers.
16 citations
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TL;DR: A general overview of the preparation, characterization and theories of block copolymer micellar systems is presented in this paper, with examples of micelle formation in aqueous and organic medium are given for di-and triblock copolymers, as well as for more complex architectures.
1,856 citations
TL;DR: In this article, the association properties of poly(ethylene oxide)-block-poly(propyleneoxide)-blockpoly(methylene oxide) (PEO) copolymers in aqueous solutions, and the adsorption at interfaces are reviewed.
1,730 citations
TL;DR: The potential utility of multimolecular assembly derived from heterobifunctional PEGs and block copolymers were explored to systematically modify the properties of metal and semiconductor nanostructures by controlling their structure and their surface properties, making them extremely attractive for use in biological and biomedical applications.
1,469 citations
TL;DR: The interactions of the Pluronic unimers with multidrug-resistant cancer cells result in sensitization of these cells with respect to various anticancer agents and the single molecular chains of copolymer, unimers, inhibit drug efflux transporters in both the blood-brain barrier and in the small intestine.
1,380 citations
TL;DR: The key performance related properties the authors discuss are loading capacity, release kinetics, circulation time, biodistribution, size, size distribution and stability, to allow the reader to tailor-make block copolymer micelles for a particular application.
1,320 citations