Article (Scientific journals)
Grafted block complex coacervate core micelles and their effect on protein adsorption on silica and polystyrene
Brzozowska, Agata M.; de Keizer, Arie; Norde, Willem et al.
2010In Colloid and Polymer Science, 288 (10/11), p. 1081-1095
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Keywords :
self-assembly in solution; micelle; stimuli responsive micelle
Abstract :
[en] We have studied the formation and the stability of grafted block complex coacervate core micelles (C3Ms) in solution and the influence of grafted block C3M coatings on the adsorption of the proteins beta-lactoglobulin, bovine serum albumin, and lysozyme. The C3Ms consist of a grafted block copolymer PAA(21)-b-PAPEO(14) (poly(acrylic acid)-b-poly(acrylate methoxy poly(ethylene oxide)), with a negatively charged PAA block and a neutral PAPEO block and a positively charged homopolymer P2MVPI (poly(N-methyl 2-vinyl pyridinium iodide). In solution, these C3Ms partly disintegrate at salt concentrations between 50 and 100 mM NaCl. Adsorption of C3Ms and proteins has been studied with fixed-angle optical reflectometry, at salt concentrations ranging from 1 to 100 mM NaCl. In comparison with the adsorption of PAA(21)-b-PAPEO(14) alone adsorption of C3Ms significantly increases the amount of PAA(21)-b-PAPEO(14) on the surface. This results in a higher surface density of PEO chains. The stability of the C3M coatings and their influence on protein adsorption are determined by the composition and the stability of the C3Ms in solution. A C3M-PAPEO(14)/P2MVPI(43) coating strongly suppresses the adsorption of all proteins on silica and polystyrene. The reduction of protein adsorption is the highest at 100 mM NaCl (> 90%). The adsorbed C3M-PAPEO(14)/P2MVPI(43) layer is partly removed from the surface upon exposure to an excess of beta-lactoglobulin solution, due to formation of soluble aggregates consisting of beta-lactoglobulin and P2MVPI(43). In contrast, C3M-PAPEO(14)/P2MVPI(228) which has a fivefold longer cationic block enhances adsorption of the negatively charged proteins on both surfaces at salt concentrations above 1 mM NaCl. A single PAA(21)-b-PAPEO(14) layer causes only a moderate reduction of protein adsorption.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry
Materials science & engineering
Author, co-author :
Brzozowska, Agata M.;  Wetsus, Centre of Excellence for Sustainable Water Technology, Leeuwarden, The Netherlands
de Keizer, Arie;  Wageningen University, The Netherlands > Laboratory of Physical Chemistry and Colloid Science,
Norde, Willem;  University Medical Center Groningen and University of Groningen, The Netherlands
Detrembleur, Christophe ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Cohen Stuart, Martien A.;  Wageningen University, The Netherlands > Laboratory of Physical Chemistry and Colloid Science
Language :
English
Title :
Grafted block complex coacervate core micelles and their effect on protein adsorption on silica and polystyrene
Publication date :
July 2010
Journal title :
Colloid and Polymer Science
ISSN :
0303-402X
eISSN :
1435-1536
Publisher :
Springer Science, Heidelberg, Germany
Volume :
288
Issue :
10/11
Pages :
1081-1095
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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