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Chaparro TDC, Silva RD, Monteiro IS, Barros-Timmons A, Giudici R, Martins Dos Santos A, Bourgeat-Lami E. Interaction of Cationic, Anionic, and Nonionic Macroraft Homo- and Copolymers with Laponite Clay. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11512-11523. [PMID: 31404489 DOI: 10.1021/acs.langmuir.9b01987] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The functionalization of Laponite RD platelets with different cationic, anionic, and nonionic homo- and copolymers synthesized by reversible addition-fragmentation chain transfer (RAFT) has been investigated. The effective interaction of the macromolecular RAFT agents (macroRAFTs) with the inorganic particles is known to be of crucial importance for the successful coating of minerals with polymers via RAFT-mediated emulsion polymerization to produce polymer-encapsulated inorganic particles. The macroRAFT agents synthesized in the present work contain carefully selected reinitiating R groups, which bear either ionizable tertiary amine or quaternary ammonium moieties (from 2-(dimethylamino)ethyl methacrylate, DMAEMA), negatively charged acrylic acid (AA) repeat units, or neutral polyethylene glycol (PEG) side chains, and are capable of interacting with Laponite via different adsorption mechanisms. The equilibrium adsorption of these RAFT (co)polymers was investigated by the plotting of adsorption isotherms, and either L-type or H-type curves were obtained. The hydrophobicity of the macroRAFT was shown to promote adsorption, as did the pending configuration of the PEG block. Charge repulsion between AA and the negatively charged surface of Laponite at pH 7.5, on the other hand, was prejudicial for adsorption, while the strong electrostatic interaction between the cationic DMAEMA molecules and the Laponite surface led to high-affinity-type curves.
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Affiliation(s)
- Thaíssa de Camargo Chaparro
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2) , 43, Bvd du 11 Novembre 1918 , F-69616 Villeurbanne , France
- Engineering School of Lorena , University of São Paulo , 12.602-810 Lorena , SP , Brazil
| | - Rodrigo Duarte Silva
- Engineering School of Lorena , University of São Paulo , 12.602-810 Lorena , SP , Brazil
| | | | - A Barros-Timmons
- Department of Chemistry, CICECO , University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro , Portugal
| | - Reinaldo Giudici
- Department of Chemical Engineering , Polytechnic School of the University of São Paulo , 05508-010 São Paulo , SP Brazil
| | | | - Elodie Bourgeat-Lami
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2) , 43, Bvd du 11 Novembre 1918 , F-69616 Villeurbanne , France
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2
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Pearson S, Pavlovic M, Augé T, Torregrossa V, Szilagyi I, D’Agosto F, Lansalot M, Bourgeat-Lami E, Prévot V. Controlling the Morphology of Film-Forming, Nanocomposite Latexes Containing Layered Double Hydroxide by RAFT-Mediated Emulsion Polymerization. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00541] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Samuel Pearson
- CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), Univ Lyon, Université Claude Bernard Lyon 1, 43 Bvd. du 11 Novembre 1918, F-69616 Villeurbanne, France
- Institut de Chimie de Clermont-Ferrand, ICCF, UMR 6296, Université Clermont Auvergne, CNRS, SIGMA-Clermont, F-63000 Clermont-Ferrand, France
| | - Marko Pavlovic
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1205 Geneva, Switzerland
| | - Thomas Augé
- CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), Univ Lyon, Université Claude Bernard Lyon 1, 43 Bvd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Valerian Torregrossa
- CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), Univ Lyon, Université Claude Bernard Lyon 1, 43 Bvd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Istvan Szilagyi
- MTA-SZTE Lendület Biocolloids Research Group, Department of Physical Chemistry and Materials Science, University of Szeged, 1 Rerrich Bela ter, 6720 Szeged, Hungary
| | - Franck D’Agosto
- CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), Univ Lyon, Université Claude Bernard Lyon 1, 43 Bvd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Muriel Lansalot
- CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), Univ Lyon, Université Claude Bernard Lyon 1, 43 Bvd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Elodie Bourgeat-Lami
- CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), Univ Lyon, Université Claude Bernard Lyon 1, 43 Bvd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Vanessa Prévot
- Institut de Chimie de Clermont-Ferrand, ICCF, UMR 6296, Université Clermont Auvergne, CNRS, SIGMA-Clermont, F-63000 Clermont-Ferrand, France
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3
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Li L, Li NK, Tu Q, Im O, Mo CK, Han W, Fuss WH, Carroll NJ, Chilkoti A, Yingling YG, Zauscher S, López GP. Functional Modification of Silica through Enhanced Adsorption of Elastin-Like Polypeptide Block Copolymers. Biomacromolecules 2018; 19:298-306. [PMID: 29195275 PMCID: PMC5809277 DOI: 10.1021/acs.biomac.7b01307] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A powerful tool for controlling interfacial properties and molecular architecture relies on the tailored adsorption of stimuli-responsive block copolymers onto surfaces. Here, we use computational and experimental approaches to investigate the adsorption behavior of thermally responsive polypeptide block copolymers (elastin-like polypeptides, ELPs) onto silica surfaces, and to explore the effects of surface affinity and micellization on the adsorption kinetics and the resultant polypeptide layers. We demonstrate that genetic incorporation of a silica-binding peptide (silaffin R5) results in enhanced adsorption of these block copolymers onto silica surfaces as measured by quartz crystal microbalance and ellipsometry. We find that the silaffin peptide can also direct micelle adsorption, leading to close-packed micellar arrangements that are distinct from the sparse, patchy arrangements observed for ELP micelles lacking a silaffin tag, as evidenced by atomic force microscopy measurements. These experimental findings are consistent with results of dissipative particle dynamics simulations. Wettability measurements suggest that surface immobilization hampers the temperature-dependent conformational change of ELP micelles, while adsorbed ELP unimers (i.e., unmicellized block copolymers) retain their thermally responsive property at interfaces. These observations provide guidance on the use of ELP block copolymers as building blocks for fabricating smart surfaces and interfaces with programmable architecture and functionality.
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Affiliation(s)
- Linying Li
- Department of Biomedical Engineering, Duke University, Durham NC 27708, U.S.A
- NSF Research Triangle Materials Research Science and Engineering Center, Durham NC 27708, U.S.A
| | - Nan K. Li
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, U.S.A
- NSF Research Triangle Materials Research Science and Engineering Center, Durham NC 27708, U.S.A
| | - Qing Tu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham NC 27708, U.S.A
| | - Owen Im
- Department of Biomedical Engineering, Duke University, Durham NC 27708, U.S.A
| | - Chia-Kuei Mo
- Department of Biomedical Engineering, Duke University, Durham NC 27708, U.S.A
| | - Wei Han
- Department of Biomedical Engineering, Duke University, Durham NC 27708, U.S.A
- NSF Research Triangle Materials Research Science and Engineering Center, Durham NC 27708, U.S.A
| | - William H. Fuss
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, U.S.A
| | - Nick J. Carroll
- Department of Biomedical Engineering, Duke University, Durham NC 27708, U.S.A
- NSF Research Triangle Materials Research Science and Engineering Center, Durham NC 27708, U.S.A
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Duke University, Durham NC 27708, U.S.A
- Department of Mechanical Engineering and Materials Science, Duke University, Durham NC 27708, U.S.A
- NSF Research Triangle Materials Research Science and Engineering Center, Durham NC 27708, U.S.A
| | - Yaroslava G. Yingling
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, U.S.A
- NSF Research Triangle Materials Research Science and Engineering Center, Durham NC 27708, U.S.A
| | - Stefan Zauscher
- Department of Mechanical Engineering and Materials Science, Duke University, Durham NC 27708, U.S.A
- NSF Research Triangle Materials Research Science and Engineering Center, Durham NC 27708, U.S.A
| | - Gabriel P. López
- Department of Biomedical Engineering, Duke University, Durham NC 27708, U.S.A
- Department of Mechanical Engineering and Materials Science, Duke University, Durham NC 27708, U.S.A
- NSF Research Triangle Materials Research Science and Engineering Center, Durham NC 27708, U.S.A
- Center for Biomedical Engineering, Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, NM 87131, U.S.A
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Bodratti AM, Sarkar B, Alexandridis P. Adsorption of poly(ethylene oxide)-containing amphiphilic polymers on solid-liquid interfaces: Fundamentals and applications. Adv Colloid Interface Sci 2017; 244:132-163. [PMID: 28069108 DOI: 10.1016/j.cis.2016.09.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 09/23/2016] [Accepted: 09/23/2016] [Indexed: 12/30/2022]
Abstract
The adsorption of amphiphilic molecules of varying size on solid-liquid interfaces modulates the properties of colloidal systems. Nonionic, poly(ethylene oxide) (PEO)-based amphiphilic molecules are particularly useful because of their graded hydrophobic-hydrophilic nature, which allows for adsorption on a wide array of solid surfaces. Their adsorption also results in other useful properties, such as responsiveness to external stimuli and solubilization of hydrophobic compounds. This review focuses on the adsorption properties of PEO-based amphiphiles, beginning with a discussion of fundamental concepts pertaining to the adsorption of macromolecules on solid-liquid interfaces, and more specifically the adsorption of PEO homopolymers. The main portion of the review highlights studies on factors affecting the adsorption and surface self-assembly of PEO-PPO-PEO block copolymers, where PPO is poly(propylene oxide). Block copolymers of this type are commercially available and of interest in several fields, due to their low toxicity and compatibility in aqueous systems. Examples of applications relevant to the interfacial behavior of PEO-PPO-PEO block copolymers are paints and coatings, detergents, filtration, and drug delivery. The methods discussed herein for manipulating the adsorption properties of PEO-PPO-PEO are emphasized for their ability to shed light on molecular interactions at interfaces. Knowledge of these interactions guides the formulation of novel materials with useful mesoscale organization and micro- and macrophase properties.
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Bourgeat-Lami E, França AJPG, Chaparro TC, Silva RD, Dugas PY, Alves GM, Santos AM. Synthesis of Polymer/Silica Hybrid Latexes by Surfactant-Free RAFT-Mediated Emulsion Polymerization. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00737] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- E. Bourgeat-Lami
- Université
de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265,, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), LCPP group, 43,
Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - A. J. P. G. França
- Université
de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265,, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), LCPP group, 43,
Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
- Laboratory
of Polymers, Department of Chemical Engineering, Engineering School
of Lorena, University of São Paulo, Estrada Municipal do Campinho, S/N, 12.602-810, Lorena, SP Brazil
| | - T. C. Chaparro
- Université
de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265,, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), LCPP group, 43,
Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
- Laboratory
of Polymers, Department of Chemical Engineering, Engineering School
of Lorena, University of São Paulo, Estrada Municipal do Campinho, S/N, 12.602-810, Lorena, SP Brazil
| | - R. D. Silva
- Laboratory
of Polymers, Department of Chemical Engineering, Engineering School
of Lorena, University of São Paulo, Estrada Municipal do Campinho, S/N, 12.602-810, Lorena, SP Brazil
| | - P.-Y. Dugas
- Université
de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265,, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), LCPP group, 43,
Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - G. M. Alves
- Laboratory
of Polymers, Department of Chemical Engineering, Engineering School
of Lorena, University of São Paulo, Estrada Municipal do Campinho, S/N, 12.602-810, Lorena, SP Brazil
| | - A. M. Santos
- Laboratory
of Polymers, Department of Chemical Engineering, Engineering School
of Lorena, University of São Paulo, Estrada Municipal do Campinho, S/N, 12.602-810, Lorena, SP Brazil
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6
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Song J, Salas C, Rojas OJ. Role of textile substrate hydrophobicity on the adsorption of hydrosoluble nonionic block copolymers. J Colloid Interface Sci 2015; 454:89-96. [PMID: 26004573 DOI: 10.1016/j.jcis.2015.04.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 04/28/2015] [Indexed: 10/23/2022]
Abstract
The adsorption of polyalkylene glycols and co-polymers of ethylene oxide and propylene oxide on substrates relevant to textiles with varying surface energies (cellulose, polypropylene, nylon and polyester) was studied by using quartz crystal microgravimetry. Langmuirian-type isotherms were observed for the adsorption profiles of nonionic block polymers of different architectures. The affinity with the surfaces is discussed based on experimental observations, which highlights the role of hydrophobic effects. For a given type of block polymer, micellar and monomeric adsorption is governed by the balance of polymer structure (mainly, chain length of hydrophobic segments) and substrate's surface energy.
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Affiliation(s)
- Junlong Song
- Jiangsu Provincial Key Laboratory of Pulp and Paper Science & Technology, Nanjing Forestry University, Nanjing, Jiangsu 210037, PR China; Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA.
| | - Carlos Salas
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA
| | - Orlando J Rojas
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA; Bio-based Colloids and Materials, School of Chemical Technology, Aalto University, P.O. Box 16300, Aalto FIN-00076, Finland.
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7
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Song J, Krause WE, Rojas OJ. Adsorption of polyalkyl glycol ethers and triblock nonionic polymers on PET. J Colloid Interface Sci 2014; 420:174-81. [DOI: 10.1016/j.jcis.2014.01.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 12/21/2013] [Accepted: 01/09/2014] [Indexed: 11/17/2022]
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8
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9
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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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10
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Gun'ko V, Leboda R, Skubiszewska-Zięba J, Goncharuk E, Nychiporuk Y, Zarko V, Blitz J. Influence of different treatments on characteristics of nanooxide powders alone or with adsorbed polar polymers or proteins. POWDER TECHNOL 2008. [DOI: 10.1016/j.powtec.2008.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Thierry B, Zimmer L, McNiven S, Finnie K, Barbé C, Griesser HJ. Electrostatic self-assembly of PEG copolymers onto porous silica nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:8143-8150. [PMID: 18590299 DOI: 10.1021/la8007206] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A critical requirement toward the clinical use of nanocarriers in drug delivery applications is the development of optimal biointerfacial engineering procedures designed to resist biologically nonspecific adsorption events. Minimization of opsonization increases blood residence time and improves the ability to target solid tumors. We report the electrostatic self-assembly of polyethyleneimine-polyethylene glycol (PEI-PEG) copolymers onto porous silica nanoparticles. PEI-PEG copolymers were synthesized and their adsorption by self-assembly onto silica surfaces were investigated to achieve a better understanding of structure-activity relationships. Quartz-crystal microbalance (QCM) study confirmed the rapid and stable adsorption of the copolymers onto silica-coated QCM sensors driven by strong electrostatic interactions. XPS and FT-IR spectroscopy were used to analyze the coated surfaces, which indicated the presence of dense PEG layers on the silica nanoparticles. Dynamic light scattering was used to optimize the coating procedure. Monodisperse dispersions of the PEGylated nanoparticles were obtained in high yields and the thin PEG layers provided excellent colloidal stability. In vitro protein adsorption tests using 5% serum demonstrated the ability of the self-assembled copolymer layers to resist biologically nonspecific fouling and to prevent aggregation of the nanoparticles in physiological environments. These results demonstrate that the electrostatic self-assembly of PEG copolymers onto silica nanoparticles used as drug nanocarriers is a robust and efficient procedure, providing excellent control of their biointerfacial properties.
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Affiliation(s)
- Benjamin Thierry
- Ian Wark Research Institute, University of South Australia, Mawson Lakes Campus, Mawson Lakes, Adelaide, South Australia 5095, Australia.
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12
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Iruthayaraj J, Poptoshev E, Vareikis A, Makuška R, van der Wal A, Claesson PM. Adsorption of Low Charge Density Polyelectrolyte Containing Poly(ethylene oxide) Side Chains on Silica: Effects of Ionic Strength and pH. Macromolecules 2005. [DOI: 10.1021/ma050851x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph Iruthayaraj
- Department of Chemistry, Surface Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden; Department of Polymer Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania; and Lever Faberage Europe Global Technology Centre, Unilever R&D, PO Box 114, 3130 AC Vlaardingen, The Netherlands
| | - Evgeni Poptoshev
- Department of Chemistry, Surface Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden; Department of Polymer Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania; and Lever Faberage Europe Global Technology Centre, Unilever R&D, PO Box 114, 3130 AC Vlaardingen, The Netherlands
| | - Aušvydas Vareikis
- Department of Chemistry, Surface Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden; Department of Polymer Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania; and Lever Faberage Europe Global Technology Centre, Unilever R&D, PO Box 114, 3130 AC Vlaardingen, The Netherlands
| | - Ričardas Makuška
- Department of Chemistry, Surface Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden; Department of Polymer Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania; and Lever Faberage Europe Global Technology Centre, Unilever R&D, PO Box 114, 3130 AC Vlaardingen, The Netherlands
| | - Albert van der Wal
- Department of Chemistry, Surface Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden; Department of Polymer Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania; and Lever Faberage Europe Global Technology Centre, Unilever R&D, PO Box 114, 3130 AC Vlaardingen, The Netherlands
| | - Per M. Claesson
- Department of Chemistry, Surface Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden; Department of Polymer Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania; and Lever Faberage Europe Global Technology Centre, Unilever R&D, PO Box 114, 3130 AC Vlaardingen, The Netherlands
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13
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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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14
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Voronin EF, Gun'ko VM, Guzenko NV, Pakhlov EM, Nosach LV, Leboda R, Skubiszewska-Zieba J, Malysheva ML, Borysenko MV, Chuiko AA. Interaction of poly(ethylene oxide) with fumed silica. J Colloid Interface Sci 2004; 279:326-40. [PMID: 15464796 DOI: 10.1016/j.jcis.2004.06.073] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2004] [Accepted: 06/27/2004] [Indexed: 10/26/2022]
Abstract
Interaction of poly(ethylene oxide) (PEO, 600 kDa) with fumed silica A-300 (SBET = 316 m2/g) was investigated under different conditions using adsorption, infrared (IR), thermal analysis (TG-DTA), AFM, and quantum chemical methods. The studied dried silica/PEO samples were also carbonized in a flow reactor at 773 K. The structural characteristics of fumed silica, PEO/silica, and pyrocarbon/fumed silica were investigated using nitrogen adsorption-desorption at 77.4 K. PEO adsorption isotherm depicts a high affinity of PEO to the fumed silica surface in aqueous medium. PEO adsorbed in the amount of 50 mg per gram of silica (PEO monolayer corresponds to CPEO approximately 190 mg/g) can disturb approximately 70% of isolated surface silanols. However, at the monolayer coverage, only 20% of oxygen atoms of PEO molecules take part in the hydrogen bonding with the surface silanols. An increase in the PEO amount adsorbed on fumed silica leads to a diminution of the specific surface area and contributions of micro- (pore radius R < 1 nm) and mesopores (1 < R < 25 nm) to the pore volume but contribution of macropores (R > 25 nm) increases with CPEO. Quantum chemical calculations of a complex of a PEO fragment with a tripple bond SiOH group of a silica cluster in the gas phase and with consideration for the solvent (water) effect show a reduction of interaction energy in the aqueous medium. However, the complex remains strong enough to provide durability of the PEO adsorption complexes on fumed silica; i.e., PEO/fumed silica nanocomposites could be stable in both gaseous and liquid media.
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Affiliation(s)
- E F Voronin
- Institute of Surface Chemistry, 17 General Naumov Street, 03164 Kiev, Ukraine
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15
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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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Chen, Even MA, Chen Z. Detecting Molecular-Level Chemical Structure and Group Orientation of Amphiphilic PEO−PPO−PEO Copolymers at Solution/Air and Solid/Solution Interfaces by SFG Vibrational Spectroscopy. Macromolecules 2003. [DOI: 10.1021/ma025985e] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chen
- Department of Macromolecular Science and Engineering and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - Mark A. Even
- Department of Macromolecular Science and Engineering and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - Zhan Chen
- Department of Macromolecular Science and Engineering and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109
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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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