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Leclercq L, Vert M. Comparison between protein repulsions by diblock PLA-PEO and albumin nanocoatings using OWLS. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 28:177-193. [DOI: 10.1080/09205063.2016.1262160] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Laurent Leclercq
- Faculty of Pharmacy, IBMM-UMR CNRS 5247, University of Montpellier – CNRS, Montpellier Cedex 5, France
| | - Michel Vert
- Faculty of Pharmacy, IBMM-UMR CNRS 5247, University of Montpellier – CNRS, Montpellier Cedex 5, France
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2
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Peng B, Chu X, Li Y, Li D, Chen Y, Zhao J. Adsorption kinetics and stability of poly(ethylene oxide)-block-polystyrene micelles on polystyrene surface. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.08.064] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Leclercq L, Modena E, Vert M. Adsorption of proteins at physiological concentrations on pegylated surfaces and the compatibilizing role of adsorbed albumin with respect to other proteins according to optical waveguide lightmode spectroscopy (OWLS). JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 24:1499-518. [DOI: 10.1080/09205063.2013.772045] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Laurent Leclercq
- a Faculty of Pharmacy, Max Mousseron Institute of Biomolecules , UMR CNRS 5247, University Montpellier 1, Team CRBA, 15 Avenue Charles Flahault, BP 14491, 34093, Montpellier Cedex 5 , France
| | - Enrico Modena
- a Faculty of Pharmacy, Max Mousseron Institute of Biomolecules , UMR CNRS 5247, University Montpellier 1, Team CRBA, 15 Avenue Charles Flahault, BP 14491, 34093, Montpellier Cedex 5 , France
| | - Michel Vert
- a Faculty of Pharmacy, Max Mousseron Institute of Biomolecules , UMR CNRS 5247, University Montpellier 1, Team CRBA, 15 Avenue Charles Flahault, BP 14491, 34093, Montpellier Cedex 5 , France
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Lu Y, Zhang X, Fan Z, Du B. Adsorption of PNIPAm110-PEO100-PPO65-PEO100-PNIPAm110 pentablock terpolymer on hydrophobic gold. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.06.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pop-Georgievski O, Popelka Š, Houska M, Chvostová D, Proks V, Rypáček F. Poly(ethylene oxide) Layers Grafted to Dopamine-melanin Anchoring Layer: Stability and Resistance to Protein Adsorption. Biomacromolecules 2011; 12:3232-42. [DOI: 10.1021/bm2007086] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ognen Pop-Georgievski
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Štěpán Popelka
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Milan Houska
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Dagmar Chvostová
- Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague, Czech Republic
| | - Vladimír Proks
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - František Rypáček
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
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Třesohlavá E, Popelka Š, Machová L, Rypáček F. Modification of Polylactide Surfaces with Lactide-Ethylene Oxide Functional Block Copolymers: Accessibility of Functional Groups. Biomacromolecules 2009; 11:68-75. [DOI: 10.1021/bm900889b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eliška Třesohlavá
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, Prague 6, 162 06, Czech Republic
| | - Štěpán Popelka
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, Prague 6, 162 06, Czech Republic
| | - Ludka Machová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, Prague 6, 162 06, Czech Republic
| | - František Rypáček
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, Prague 6, 162 06, Czech Republic
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Laser reflectometry: Examination of the influence of some assumptions and approximations to calculate the adsorption from the reflectometric signal. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2007.06.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Popelka S, Machová L, Rypácek F. Adsorption of poly(ethylene oxide)-block-polylactide copolymers on polylactide as studied by ATR-FTIR spectroscopy. J Colloid Interface Sci 2007; 308:291-9. [PMID: 17266980 DOI: 10.1016/j.jcis.2006.12.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2006] [Revised: 12/06/2006] [Accepted: 12/06/2006] [Indexed: 11/29/2022]
Abstract
In this study, the adsorption of amphiphilic poly(ethylene oxide)-block-polylactide (mPEO-PLA) copolymers from a selective solvent onto a polylactide surface was studied as a method of polylactide surface modification and its effect on nonspecific protein adsorption was evaluated. A series of well defined mPEO-PLA copolymers was prepared to investigate the effect of copolymer composition on the resulting PEO chain density and on the surface resistance to protein adsorption. The copolymers contained PEO blocks with molecular weights ranging between 5600 and 23,800 and with 16-47 wt% of PLA. The adsorption of both the copolymers and bovine serum albumin was quantified by attenuated total reflection FTIR spectroscopy (ATR-FTIR). In addition to the adsorbed copolymer amount, its actual composition was determined. The PEO chain density on the surface was found to decrease with the molecular weight of the PEO block and to increase with the molecular weight of the PLA block. The adsorbed copolymers displayed the ability to reduce protein adsorption. The maximum reduction within the tested series (by 80%) was achieved with the copolymer containing PEO of MW 5600 and a PLA block of the same MW.
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Affiliation(s)
- Stepán Popelka
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic.
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Nnebe IM, Tilton RD, Schneider JW. Direct force measurement of the stability of poly(ethylene glycol)-polyethylenimine graft films. J Colloid Interface Sci 2006; 276:306-16. [PMID: 15271557 DOI: 10.1016/j.jcis.2004.03.065] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2003] [Accepted: 03/19/2004] [Indexed: 11/29/2022]
Abstract
The stability and passivity of poly(ethylene glycol)-polyethylenimine (PEG-PEI) graft films are important for their use as antifouling coatings in a variety of biotechnology applications. We have used AFM colloidal-probe force measurements combined with optical reflectometry to characterize the surface properties and stability of PEI and dense PEG-PEI graft films on silica. Initial contact between bare silica probes and PEI-modified surfaces yields force curves that exhibit a long-range electrostatic repulsion and short-range attraction between the surfaces, indicating spontaneous desorption of PEI in the aqueous medium. Further transfer of PEI molecules to the probe occurs with subsequent application of forces between FR = 300 and 500 microN/m. The presence of PEG reduces the adhesive properties of the PEI surface and prevents transfer of PEI molecules to the probe with continuous contact, though an initial desorption of PEI still occurs. Glutaraldehyde crosslinking of the graft films prevents both the initial desorption and subsequent transfer of the PEI, resulting in sustained attractive interaction forces of electrostatic origin between the negatively charged probe and the positively charged copolymer graft films.
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Affiliation(s)
- Ijeoma M Nnebe
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213-3890, USA
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Vangeyte P, Leyh B, Rojas OJ, Claesson PM, Heinrich M, Auvray L, Willet N, Jérôme R. Adsorption of poly(ethylene oxide)-b-poly(epsilon-caprolactone) copolymers at the silica-water interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:2930-2940. [PMID: 15779968 DOI: 10.1021/la047425+] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The adsorption of amphiphilic poly(ethylene oxide)-b-poly(epsilon-caprolactone) and poly(ethylene oxide)-b-poly(gamma-methyl-epsilon-caprolactone) copolymers in aqueous solution on silica and glass surfaces has been investigated by flow microcalorimetry, small-angle neutron scattering (SANS), surface forces, and complementary techniques. The studied copolymers consist of a poly(ethylene oxide) (PEO) block of M(n) = 5000 and a hydrophobic polyester block of poly(epsilon-caprolactone) (PCL) or poly(gamma-methyl-epsilon-caprolactone) (PMCL) of M(n) in the 950-2200 range. Compared to homoPEO, the adsorption of the copolymers is significantly increased by the connection of PEO to an aliphatic polyester block. According to calorimetric experiments, the copolymers interact with the surface mainly through the hydrophilic block. At low surface coverage, the PEO block interacts with the surface such that both PEO and PCL chains are exposed to the aqueous solution. At high surface coverage, a dense copolymer layer is observed with the PEO blocks oriented toward the solution. The structure of the copolymer layer has been analyzed by neutron scattering using the contrast matching technique and by tapping mode atomic force microscopy. The experimental observations agree with the coadsorption of micelles and free copolymer chains at the interface.
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Affiliation(s)
- P Vangeyte
- Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6a, B-4000 Liège, Belgium
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Hamley IW, Connell SD, Collins S. In Situ Atomic Force Microscopy Imaging of Adsorbed Block Copolymer Micelles. Macromolecules 2004. [DOI: 10.1021/ma049396f] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ian W. Hamley
- Department of Chemistry and Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
| | - Simon D. Connell
- Department of Chemistry and Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
| | - Stephen Collins
- Department of Chemistry and Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
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Muller D, Carlsson F, Malmsten M. Adsorption of Poly(ethylene oxide)-Poly(lactide) Copolymers. Effects of Composition and Degradation. J Colloid Interface Sci 2001; 236:116-126. [PMID: 11254336 DOI: 10.1006/jcis.2000.7329] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effect of chemical degradation of two diblock copolymers of poly(ethylene oxide) (E) and poly(lactide) (L), E(39)L(5) and E(39)L(20), on their adsorption at silica and methylated silica was investigated with in situ ellipsometry. Steric stablization of polystyrene dispersions was investigated in relation to degradation. Hydrolysis of the poly(lactide) block of the copolymers was followed at different temperatures and pH by using HPLC to measure the occurrence of lactic acid in solution. The block copolymers were quite stable in pH-unadjusted solution at low temperature, whereas degradation was facilitated by increasing temperature or lowering of the pH. Lower degradation rates of E(39)L(20) where observed at low temperature in comparison with those of E(39)L(5), whereas the degradation rates of the copolymers were quantitatively similar at high temperature. The adsorption of the copolymers at methylated silica substrates decreased with increasing degree of degradation due to the reduction in the ability of hydrophobic block to anchor the copolymer layer at the surface. At silica the adsorption initially increased with increasing degradation, particularly for E(39)L(20) due to deposition of aggregates onto the surface. After extensive degradation the adsorption of the copolymers at both silica and methylated silica resembled that of the corresponding poly(ethylene oxide) homopolymer. Overall, it was found that the eventual reduction in adsorption occurred at a lower degree of degradation for E(39)L(5) than for E(39)L(20). Mean-field calculations showed a reduced anchoring for the block copolymers with decreasing poly(lactide) block length at hydrophobic surfaces. In accordance with this finding, it was observed that polystyrene dispersions were stabilized by E(39)L(20) or E(39)L(5) in a way that depended on both the lactide block length and the degree of degradation. Upon degradation of the hydrophobic block, stabilization of the polystyrene dispersions was maintained initially, but eventually degradation resulted in destabilization. The average residual copolymer concentration required for stabilization of the polystyrene dispersions was much higher than the corresponding concentration of intact copolymer required for stabilization. Copyright 2001 Academic Press.
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Affiliation(s)
- Dries Muller
- Institute for Surface Chemistry, Stockholm, SE-114 86, Sweden
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