1
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Sánchez-Morán H, Kaar JL, Schwartz DK. Supra-biological performance of immobilized enzymes enabled by chaperone-like specific non-covalent interactions. Nat Commun 2024; 15:2299. [PMID: 38485940 PMCID: PMC10940687 DOI: 10.1038/s41467-024-46719-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 03/01/2024] [Indexed: 03/18/2024] Open
Abstract
Designing complex synthetic materials for enzyme immobilization could unlock the utility of biocatalysis in extreme environments. Inspired by biology, we investigate the use of random copolymer brushes as dynamic immobilization supports that enable supra-biological catalytic performance of immobilized enzymes. This is demonstrated by immobilizing Bacillus subtilis Lipase A on brushes doped with aromatic moieties, which can interact with the lipase through multiple non-covalent interactions. Incorporation of aromatic groups leads to a 50 °C increase in the optimal temperature of lipase, as well as a 50-fold enhancement in enzyme activity. Single-molecule FRET studies reveal that these supports act as biomimetic chaperones by promoting enzyme refolding and stabilizing the enzyme's folded and catalytically active state. This effect is diminished when aromatic residues are mutated out, suggesting the importance of π-stacking and π-cation interactions for stabilization. Our results underscore how unexplored enzyme-support interactions may enable uncharted opportunities for using enzymes in industrial biotransformations.
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Affiliation(s)
- Héctor Sánchez-Morán
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Campus Box 596, Boulder, CO, 80309, USA
| | - Joel L Kaar
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Campus Box 596, Boulder, CO, 80309, USA.
| | - Daniel K Schwartz
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Campus Box 596, Boulder, CO, 80309, USA.
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2
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McDonald J, von Spakovsky MR, Reynolds WT. Predicting Polymer Brush Behavior in Solvents Using the Steepest-Entropy-Ascent Quantum Thermodynamic Framework. J Phys Chem B 2023; 127:10370-10391. [PMID: 38006350 DOI: 10.1021/acs.jpcb.3c02713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2023]
Abstract
The steepest-entropy-ascent quantum thermodynamic (SEAQT) framework is utilized to study the effects of temperature on polymer brushes. The brushes are represented by a discrete energy spectrum, and energy degeneracies obtained through the replica-exchange Wang-Landau algorithm. The SEAQT equation of motion is applied to the density of states to establish a unique kinetic path from an initial thermodynamic state to a stable equilibrium state. The kinetic path describes the brush's evolution in state space, as it interacts with a thermal reservoir. The predicted occupation probabilities along the kinetic path are used to determine the expected thermodynamic and structural properties. The polymer density profile of a polystyrene brush in cyclohexane solvent is predicted using the equation of motion, and it agrees qualitatively with the experimental density profiles. The Flory-Huggins parameter chosen to describe brush-solvent interactions affects the solvent distribution in the brush but has a minimal impact on the polymer density profile. Three types of nonequilibrium kinetic paths with differing amounts of entropy production are considered: a heating path, a cooling path, and a heating-cooling path. Properties such as tortuosity, radius of gyration, brush density, solvent density, and brush chain conformations are calculated for each path.
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Affiliation(s)
- Jared McDonald
- Materials Science & Engineering Department, Virginia Tech, Blacksburg, Virginia 24061, United States
| | | | - William T Reynolds
- Materials Science & Engineering Department, Virginia Tech, Blacksburg, Virginia 24061, United States
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3
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Telles IM, Arfan M, Dos Santos AP. Effects of electrostatic coupling and surface polarization on polyelectrolyte brush structure. J Chem Phys 2023; 158:144902. [PMID: 37061472 DOI: 10.1063/5.0147056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2023] Open
Abstract
In this work, we perform molecular dynamics simulations to study a spherical polyelectrolyte brush. We explore the effects of surface polarization and electrostatic coupling on brush size and distribution of counterions. The method of image charges is considered to take into account surface polarization, considering a metallic, an unpolarizable, and a dielectric nano-core. It is observed that, for all cases, a moderate shrinking-swelling effect appears with an increase in the electrostatic coupling parameter. This effect occurs under high Manning ratios. The curves relating the average size of polyelectrolyte brush as a function of coupling show a minimum. The results show that the grafting density of polyelectrolytes on the nano-core surface plays an important role in the polarization effect. We consider a modified Poisson-Boltzmann theory to describe the counterion profiles around the brush in the case of unpolarizable nano-cores and weak electrostatic coupling.
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Affiliation(s)
- Igor M Telles
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Muhammad Arfan
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Alexandre P Dos Santos
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970 Porto Alegre, RS, Brazil
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4
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He Q, Qiao Y, Medina Jimenez C, Hackler R, Martinson ABF, Chen W, Tirrell MV. Ion Specificity Influences on the Structure of Zwitterionic Brushes. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Affiliation(s)
- Qiming He
- Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, 5640 S Ellis Ave, Chicago, Illinois 60637, United States
| | - Yijun Qiao
- Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Carlos Medina Jimenez
- Pritzker School of Molecular Engineering, University of Chicago, 5640 S Ellis Ave, Chicago, Illinois 60637, United States
| | - Ryan Hackler
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Alex B. F. Martinson
- Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Wei Chen
- Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, 5640 S Ellis Ave, Chicago, Illinois 60637, United States
| | - Matthew V. Tirrell
- Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, 5640 S Ellis Ave, Chicago, Illinois 60637, United States
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5
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Vagias A, Nelson A, Wang P, Reitenbach J, Geiger C, Kreuzer LP, Saerbeck T, Cubitt R, Benetti EM, Müller-Buschbaum P. The Topology of Polymer Brushes Determines Their Nanoscale Hydration. Macromol Rapid Commun 2023; 44:e2300035. [PMID: 36815590 DOI: 10.1002/marc.202300035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Indexed: 02/24/2023]
Abstract
Time-of-flight neutron reflectometry (ToF-NR) performed under different relative humidity conditions demonstrates that polymer brushes constituted by hydrophilic, cyclic macromolecules exhibit a more compact conformation with lower roughness as compared to linear brush analogues, due to the absence of dangling chain ends extending at the polymer-vapor interface. In addition, cyclic brushes feature a larger swelling ratio and an increased solvent uptake with respect to their linear counterparts as a consequence of the increased interchain steric repulsions. It is proposed that differences in swelling ratios between linear and cyclic brushes come from differences in osmotic pressure experienced by each brush topology. These differences stem from entropic constraints. The findings suggest that to correlate the equilibrium swelling ratios at different relative humidity for different topologies a new form of the Flory-like expression for equilibrium thicknesses of grafted brushes is needed.
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Affiliation(s)
- Apostolos Vagias
- Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Lichtenbergstr. 1, 85748, Garching, Germany
| | - Andrew Nelson
- ANSTO, New Illawarra Road, Lucas Heights, NSW, 2234, Australia
| | - Peixi Wang
- Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748, Garching, Germany
| | - Julija Reitenbach
- Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748, Garching, Germany
| | - Christina Geiger
- Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748, Garching, Germany
| | - Lucas Philipp Kreuzer
- Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Lichtenbergstr. 1, 85748, Garching, Germany.,Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748, Garching, Germany
| | - Thomas Saerbeck
- Institut Laue Langevin (ILL), 71 Avenue des Martyrs, Grenoble, 38000, France
| | - Robert Cubitt
- Institut Laue Langevin (ILL), 71 Avenue des Martyrs, Grenoble, 38000, France
| | - Edmondo Maria Benetti
- Polymer Surfaces Group, Department of Chemical Sciences, University of Padova, Via Marzolo 1, Padova, 35122, Italy.,Laboratory for Surface Science and Technology, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, Zürich, 8093, Switzerland
| | - Peter Müller-Buschbaum
- Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Lichtenbergstr. 1, 85748, Garching, Germany.,Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748, Garching, Germany
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6
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Smook LA, de Beer S. Electrostatic Fields Stimulate Absorption of Small Neutral Molecules in Gradient Polyelectrolyte Brushes. Chemphyschem 2023; 24:e202300003. [PMID: 36811215 DOI: 10.1002/cphc.202300003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 01/27/2023] [Indexed: 02/24/2023]
Abstract
Molecules can partition from a solution into a polymer coating, leading to a local enrichment. If one can control this enrichment via external stimuli, one can implement such coatings in novel separation technologies. Unfortunately, these coatings are often resource intensive as they require stimuli in the form changes of bulk solvent conditions such as acidity, temperature, or ionic strength. Electrically driven separation technology may provide an appealing alternative, as this will allow local, surface-bound stimuli instead of system-wide bulk stimuli to induce responsiveness. Therefore, we investigate via coarse grained molecular dynamics simulations the possibility of using coatings with charged moieties, specifically gradient polyelectrolyte brushes, to control the enrichment of the neutral target molecules near the surface with applied electric fields. We find that targets which interact more strongly with the brush show both more absorption and a larger modulation by electric fields. For the strongest interactions evaluated in this work, we obtained absorption changes of over 300 % between the collapsed and extended state of the coating.
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Affiliation(s)
- Leon A Smook
- Sustainable Polymer Chemistry, Department of Molecules and Materials, MESA+ Institute for Nanotechnology, University of Twente, The Netherlands
| | - Sissi de Beer
- Sustainable Polymer Chemistry, Department of Molecules and Materials, MESA+ Institute for Nanotechnology, University of Twente, The Netherlands
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7
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Micciulla S, Gutfreund P, Kanduč M, Chiappisi L. Pressure-Induced Phase Transitions of Nonionic Polymer Brushes. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c01979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Samantha Micciulla
- Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042Grenoble, France
| | - Philipp Gutfreund
- Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042Grenoble, France
| | - Matej Kanduč
- Jožef Stefan Institute, Jamova 39, SI-1000Ljubljana, Slovenia
| | - Leonardo Chiappisi
- Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042Grenoble, France
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8
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Glišić I, Ritsema van Eck GC, Smook LA, de Beer S. Enhanced vapor sorption in block and random copolymer brushes. SOFT MATTER 2022; 18:8398-8405. [PMID: 36259991 PMCID: PMC9667471 DOI: 10.1039/d2sm00868h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Polymer brushes in gaseous environments absorb and adsorb vapors of favorable solvents, which makes them potentially relevant for sensing applications and separation technologies. Though significant amounts of vapor are sorbed in homopolymer brushes at high vapor pressures, at low vapor pressures sorption remains limited. In this work, we vary the structure of two-component polymer brushes and investigate the enhancement in vapor sorption at different relative vapor pressures compared to homopolymer brushes. We perform molecular dynamics simulations on two-component block and random copolymer brushes and investigate the influence of monomer miscibility and formation of high-energy interfaces between immiscible monomers on vapor sorption. Additionally, we present absorption isotherms of pure homopolymer, mixed binary brush and 2-block, 4-block, and random copolymer brushes. Based on these isotherms, we finally show that random copolymer brushes absorb more vapor than any other architecture investigated thus far. Random brushes display enhanced sorption at both high and low vapor pressures, with the largest enhancement in sorption at low vapor pressures.
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Affiliation(s)
- Ivona Glišić
- Sustainable Polymer Chemistry Group, Department of Molecules & Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
| | - Guido C Ritsema van Eck
- Sustainable Polymer Chemistry Group, Department of Molecules & Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
| | - Leon A Smook
- Sustainable Polymer Chemistry Group, Department of Molecules & Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
| | - Sissi de Beer
- Sustainable Polymer Chemistry Group, Department of Molecules & Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
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9
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Ritsema van Eck G, Kiens EM, Veldscholte LB, Brió Pérez M, de Beer S. Vapor Swelling of Polymer Brushes Compared to Nongrafted Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:13763-13770. [PMID: 36331903 PMCID: PMC9671043 DOI: 10.1021/acs.langmuir.2c01889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 10/25/2022] [Indexed: 05/28/2023]
Abstract
Polymer brushes, coatings of polymers covalently end-grafted to a surface, have been proposed as a more stable alternative to traditional physisorbed coatings. However, when such coatings are applied in settings such as vapor sensing and gas separation technologies, their responsiveness to solvent vapors becomes an important consideration. It can be anticipated that the end-anchoring in polymer brushes reduces the translational entropy of the polymers and instead introduces an entropic penalty against stretching when vapor is absorbed. Therefore, swelling can be expected to be diminished in brushes compared to nongrafted films. Here, we study the effect of the anchoring-constraint on vapor sorption in polymer coatings using coarse-grained molecular dynamics simulations as well as humidity-controlled ellipsometry on chemically identical polymer brushes and nongrafted films. We find a qualitative agreement between simulations and experiments, with both indicating that brushes certainly swell less than physisorbed films, although this effect is minor for common grafting densities. Our results imply that polymer brushes indeed hold great potential for the intended applications.
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10
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Etha SA, Pial TH, Das S. Extensive Stable Physical Contacts between a Nanoparticle and a Highly Repulsive Polymeric Layer. J Phys Chem B 2022; 126:5715-5725. [PMID: 35867556 DOI: 10.1021/acs.jpcb.2c04010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Interaction between nanoparticles (NPs) and a layer of grafted and solvated polymer molecules has been widely explored for a variety of applications ranging from fabrication of nanocomposites and sensors to developing nanocoating for virus deactivation. In all of these applications, the solvated polymer molecules are necessarily philic to the NPs, and consequently, driven by the favorable NP-polymer interactions, there is the formation of numerous stable direct (i.e., without any intervening solvent molecule) NP-monomer (monomer of the polymer) contact pairs. In this paper, we propose a paradigm shift in this problem: we employ molecular dynamics (MD) simulations and establish that under appropriate conditions, it is possible to develop numerous stable direct contacts between a NP and a solvated polymer layer even when the polymer molecules are extremely phobic to the NP. Here, by "stable" contacts, we refer to the NP-Polymer contacts that remain intact for a finite duration of time; of course, such contacts, after being intact for a finite time duration, might get broken and reformed. In terms of the mechanism of the process, the NP is driven inside a grafted layer of collapsed (in the absence of solvent) and phobic (to the NP) polymer molecules by a liquid drop (polymer is philic to the liquid). Subsequently, the liquid molecules imbibe and diffuse inside the polymer layer, but the NPs, due to the large steric effect imposed by the polymer molecules, remain localized within the polymer layer. This ensures the establishment of several stable direct contacts between the NP and the highly phobic polymer molecules. We quantify these contacts by their numbers, stability, and frequency of occurrences as well as their dependences on the NP-polymer interaction energies and NP sizes. We also quantify the associated NP dynamics inside the polymeric layer. Finally, we argue that our finding will open up avenues for leveraging NP-polymer interactions for a myriad of applications even for cases where the polymer molecules are phobic to the NPs.
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Affiliation(s)
- Sai Ankit Etha
- Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Turash Haque Pial
- Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Siddhartha Das
- Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
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11
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Yao Y, Zhu YL, Ma X, Zhou J. Interactions on Proteins Arising from the Self-Assembly of a Polyelectrolyte Brush. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:7759-7765. [PMID: 35709429 DOI: 10.1021/acs.langmuir.2c00801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Surfaces grafted with polyelectrolyte chains for excellent performance in protein antifouling are highly desired in many applications, such as biomedical implants and devices. In general, the adsorbing/resisting behaviors of proteins can be mainly attributed to the electrostatic interactions that are associated with the charge properties of proteins and polyelectrolytes. By coarse-grained molecular dynamics simulations, we examined the self-assembled structures of polyanion and polyzwitterion brushes as well as the interactions on negatively and positively charged proteins. We found that in addition to charges, the structural polarization induced by self-assembly with a certain charge distribution shows significant influences on protein behavior. The large-scale dipole-dipole interactions between brushes and proteins can dominate the behavior of proteins on the brushes under certain circumstances. To ensure simulation accuracy, we compared two models and found a polar Martini model that explicitly treats electrostatic interactions as long-ranged ones, giving a more reasonable structural description compared with the normal Martini model that truncates electrostatic interactions.
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Affiliation(s)
- Yunming Yao
- Department of Dermatology and Venereology, The First Hospital of Jilin University, Changchun, Jilin 130021, China
| | - You-Liang Zhu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Xiaoyuan Ma
- Jilin Provincial Center for Animal Disease Control and Prevention, Changchun 130062, China
| | - Junfeng Zhou
- Department of Dermatology and Venereology, The First Hospital of Jilin University, Changchun, Jilin 130021, China
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12
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Ritsema van Eck G, Chiappisi L, de Beer S. Fundamentals and Applications of Polymer Brushes in Air. ACS APPLIED POLYMER MATERIALS 2022; 4:3062-3087. [PMID: 35601464 PMCID: PMC9112284 DOI: 10.1021/acsapm.1c01615] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 01/03/2022] [Indexed: 05/22/2023]
Abstract
For several decades, high-density, end-tethered polymers, forming so-called polymer brushes, have inspired scientists to understand their properties and to translate them to applications. While earlier research focused on polymer brushes in liquids, it was recently recognized that these brushes can find application in air as well. In this review, we report on recent progress in unraveling fundamental concepts of brushes in air, such as their vapor-swelling and solvent partitioning. Moreover, we provide an overview of the plethora of applications in air (e.g., in sensing, separations or smart adhesives) where brushes can be key components. To conclude, we provide an outlook by identifying open questions and issues that, when solved, will pave the way for the large scale application of brushes in air.
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Affiliation(s)
- Guido
C. Ritsema van Eck
- Sustainable
Polymer Chemistry Group, Department of Molecules & Materials,
MESA+ Institute for Nanotechnology, University
of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Leonardo Chiappisi
- Institut
Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042 Grenoble, France
| | - Sissi de Beer
- Sustainable
Polymer Chemistry Group, Department of Molecules & Materials,
MESA+ Institute for Nanotechnology, University
of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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13
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Yamazoe K, Higaki Y, Inutsuka Y, Miyawaki J, Takahara A, Harada Y. Critical In-Plane Density of Polyelectrolyte Brush for the Ordered Hydrogen-Bonded Structure of Incorporated Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:3076-3081. [PMID: 35230121 DOI: 10.1021/acs.langmuir.1c02895] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A polymer electrolyte brush is a reasonable platform to confine water molecules within a nanoscopic area to study their role in the function of interacting media because of their adjustable nanospace and charge by changing the in-plane density and side chains of the brush. Here, we demonstrate how the in-plane spacing of cationic polymer brush chains, poly[2-(methacryloyloxy)ethyltrimethylammonium chloride] (PMTAC), affects the hydrogen bond configuration of incorporated water using soft X-ray emission spectroscopy. At the critical in-plane density σ = 0.30 chains/nm2 of PMTAC, tetrahedrally coordinated water molecules started to melt into distorted or broken hydrogen-bonded configurations. Considering the charge on the quaternary ammonium cations, the electric field required to form a tetrahedrally coordinated hydrogen-bonded configuration was estimated as ∼500 kV cm-1 and is effective up to ∼1 nm from the surface of the polymer chain. These findings are useful for designing specific interface properties and the resultant surface function of polyelectrolyte-based materials.
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Affiliation(s)
- Kosuke Yamazoe
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Yuji Higaki
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshihiro Inutsuka
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Jun Miyawaki
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Synchrotron Radiation Research Organization, The University of Tokyo, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Atsushi Takahara
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshihisa Harada
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Synchrotron Radiation Research Organization, The University of Tokyo, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
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14
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Erbaş A, Inci F. The Role of Ligand Rebinding and Facilitated Dissociation on the Characterization of Dissociation Rates by Surface Plasmon Resonance (SPR) and Benchmarking Performance Metrics. Methods Mol Biol 2022; 2385:237-253. [PMID: 34888723 DOI: 10.1007/978-1-0716-1767-0_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Surface plasmon resonance (SPR) is a real-time kinetic measurement principle that can probe the kinetic interactions between ligands and their binding sites, and lies at the backbone of pharmaceutical, biosensing, and biomolecular research. The extraction of dissociation rates from SPR-response signals often relies on several commonly adopted assumptions, one of which is the exponential decay of the dissociation part of the response signal. However, certain conditions, such as high density of binding sites or high concentration fluctuations near the surface as compared to the bulk, can lead to non-exponential decays via ligand rebinding or facilitated dissociation. Consequently, fitting the data with an exponential function can underestimate or overestimate the measured dissociation rates. Here, we describe a set of alternative fit functions that can take such effects into consideration along with plasmonic sensor design principles with key performance metrics, thereby suggesting methods for error-free high-precision extraction of the dissociation rates.
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Affiliation(s)
- Aykut Erbaş
- UNAM-National Nanotechnology Research Center and Institute of Materials Science Nanotechnology, Bilkent University, Ankara, Turkey.
| | - Fatih Inci
- UNAM-National Nanotechnology Research Center and Institute of Materials Science Nanotechnology, Bilkent University, Ankara, Turkey.
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15
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Huang H, Zhang C, Crisci R, Lu T, Hung HC, Sajib MSJ, Sarker P, Ma J, Wei T, Jiang S, Chen Z. Strong Surface Hydration and Salt Resistant Mechanism of a New Nonfouling Zwitterionic Polymer Based on Protein Stabilizer TMAO. J Am Chem Soc 2021; 143:16786-16795. [PMID: 34582683 DOI: 10.1021/jacs.1c08280] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Zwitterionic polymers exhibit excellent nonfouling performance due to their strong surface hydrations. However, salt molecules may severely reduce the surface hydrations of typical zwitterionic polymers, making the application of these polymers in real biological and marine environments challenging. Recently, a new zwitterionic polymer brush based on the protein stabilizer trimethylamine N-oxide (TMAO) was developed as an outstanding nonfouling material. Using surface-sensitive sum frequency generation (SFG) vibrational spectroscopy, we investigated the surface hydration of TMAO polymer brushes (pTMAO) and the effects of salts and proteins on such surface hydration. It was discovered that exposure to highly concentrated salt solutions such as seawater only moderately reduced surface hydration. This superior resistance to salt effects compared to other zwitterionic polymers is due to the shorter distance between the positively and negatively charged groups, thus a smaller dipole in pTMAO and strong hydration around TMAO zwitterion. This results in strong bonding interactions between the O- in pTMAO and water, and weaker interaction between O- and metal cations due to the strong repulsion from the N+ and hydration water. Computer simulations at quantum and atomistic scales were performed to support SFG analyses. In addition to the salt effect, it was discovered that exposure to proteins in seawater exerted minimal influence on the pTMAO surface hydration, indicating complete exclusion of protein attachment. The excellent nonfouling performance of pTMAO originates from its extremely strong surface hydration that exhibits effective resistance to disruptions induced by salts and proteins.
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Affiliation(s)
| | | | | | | | - Hsiang-Chieh Hung
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Md Symon Jahan Sajib
- Department of Chemical Engineering, Howard University, Washington D.C. 20059, United States
| | - Pranab Sarker
- Department of Chemical Engineering, Howard University, Washington D.C. 20059, United States
| | - Jinrong Ma
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Tao Wei
- Department of Chemical Engineering, Howard University, Washington D.C. 20059, United States
| | - Shaoyi Jiang
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York 14853, United States
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16
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Smook LA, Ritsema van Eck GC, de Beer S. Vapor sorption in binary polymer brushes: The effect of the polymer-polymer interface. J Chem Phys 2021; 155:054904. [PMID: 34364330 DOI: 10.1063/5.0057065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Polymer brushes attract vapors that are good solvents for polymers. This is useful in sensing and other technologies that rely on concentrating vapors for optimal performance. It was recently shown that vapor sorption can be enhanced further by incorporating two incompatible types of polymers A and B in the brushes: additional vapor adsorbs at the high-energy polymer-polymer interface in these binary brushes. In this article, we present a model that describes this enhanced sorption in binary brushes of immiscible A-B polymers. To do so, we set up a free-energy model to predict the interfacial area between the different polymer phases in binary brushes. This description is combined with Gibbs adsorption isotherms to determine the adsorption at these interfaces. We validate our model with coarse-grained molecular dynamics simulations. Moreover, based on our results, we propose design parameters (A-B chain fraction, grafting density, vapor, and A-B interaction strength) for optimal vapor absorption in coatings composed of binary brushes.
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Affiliation(s)
- Leon A Smook
- Sustainable Polymer Chemistry Group, Department of Molecules and Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Guido C Ritsema van Eck
- Sustainable Polymer Chemistry Group, Department of Molecules and Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Sissi de Beer
- Sustainable Polymer Chemistry Group, Department of Molecules and Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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17
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Ehtiati K, Z. Moghaddam S, Daugaard AE, Thormann E. Crucial Nonelectrostatic Effects on Polyelectrolyte Brush Behavior. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02526] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Koosha Ehtiati
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Saeed Z. Moghaddam
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Anders E. Daugaard
- Danish Polymer Center, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Esben Thormann
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
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18
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Smook LA, Ritsema van Eck GC, de Beer S. Friends, Foes, and Favorites: Relative Interactions Determine How Polymer Brushes Absorb Vapors of Binary Solvents. Macromolecules 2020; 53:10898-10906. [PMID: 33380750 PMCID: PMC7759003 DOI: 10.1021/acs.macromol.0c02228] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/17/2020] [Indexed: 11/30/2022]
Abstract
Polymer brushes can absorb vapors from the surrounding atmosphere, which is relevant for many applications such as in sensing and separation technologies. In this article, we report on the absorption of binary mixtures of solvent vapors (A and B) with a thermodynamic mean-field model and with grand-canonical molecular dynamics simulations. Both methods show that the vapor with the strongest vapor-polymer interaction is favored and absorbs preferentially. In addition, the absorption of one vapor (A) influences the absorption of another (B). If the A-B interaction is stronger than the interaction between vapor B and the polymers, the presence of vapor A in the brush can aid the absorption of B: the vapors absorb collaboratively as friends. In contrast, if the A-polymer interaction is stronger than the B-polymer interaction and the brush has reached its maximum sorption capacity, the presence of A can reduce the absorption of B: the vapors absorb competitively as foes.
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Affiliation(s)
- Leon A. Smook
- Sustainable Polymer Chemistry, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
| | - Guido C. Ritsema van Eck
- Sustainable Polymer Chemistry, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
| | - Sissi de Beer
- Sustainable Polymer Chemistry, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
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19
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Horst RJ, Brió Pérez M, Cohen R, Cirelli M, Dueñas Robles PS, Elshof MG, Andreski A, Hempenius MA, Benes NE, Damen C, de Beer S. Swelling of Poly(methyl acrylate) Brushes in Acetone Vapor. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:12053-12060. [PMID: 32997502 PMCID: PMC7558288 DOI: 10.1021/acs.langmuir.0c02510] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Indexed: 06/01/2023]
Abstract
Sensor platforms can benefit from the incorporation of polymer brushes since brushes can concentrate the analyte near the sensor surface. Brushes that absorb acetone vapor are of particular interest since acetone is an important marker for biological processes. We present a simple procedure to synthesize acetone-responsive poly(methyl acrylate) brushes. Using spectroscopic ellipsometry, we show that these brushes respond within seconds and swell by more than 30% when exposed to acetone vapor. Moreover, quartz crystal microbalance measurements demonstrate that the brushes can be exploited to increase the acetone detection sensitivity of sensors by more than a factor 6. Surprisingly, we find that the swelling ratio of the brushes in acetone vapor is independent of the grafting density and the degree of polymerization of the polymers in the brush. This is qualitatively different from swelling of the same brushes in liquid environments, where the swelling ratio decreases for increasing grafting densities. Yet, it indicates that the brushes are robust and reproducible candidates for implementation in vapor sensor systems.
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Affiliation(s)
- Rens J. Horst
- Materials
Science and Technology of Polymers, University
of Twente, 7522 NB Enschede, The Netherlands
| | - Maria Brió Pérez
- Materials
Science and Technology of Polymers, University
of Twente, 7522 NB Enschede, The Netherlands
| | - Rick Cohen
- Department
of Chemistry, Saxion University of Applied
Sciences, 7513 AB Enschede, The Netherlands
| | - Marco Cirelli
- Materials
Science and Technology of Polymers, University
of Twente, 7522 NB Enschede, The Netherlands
| | - Paloma S. Dueñas Robles
- Materials
Science and Technology of Polymers, University
of Twente, 7522 NB Enschede, The Netherlands
| | - Maria G. Elshof
- Membrane
Science and Technology Cluster, University
of Twente, 7522 NB Enschede, The Netherlands
| | - Aleksandar Andreski
- Department
of Nanotechnology, Saxion University of
Applied Sciences, 7513 AB Enschede, The Netherlands
| | - Mark A. Hempenius
- Materials
Science and Technology of Polymers, University
of Twente, 7522 NB Enschede, The Netherlands
| | - Nieck E. Benes
- Membrane
Science and Technology Cluster, University
of Twente, 7522 NB Enschede, The Netherlands
| | - Cas Damen
- Department
of Nanotechnology, Saxion University of
Applied Sciences, 7513 AB Enschede, The Netherlands
| | - Sissi de Beer
- Materials
Science and Technology of Polymers, University
of Twente, 7522 NB Enschede, The Netherlands
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20
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Ritsema van Eck GC, Veldscholte LB, Nijkamp JHWH, de Beer S. Sorption Characteristics of Polymer Brushes in Equilibrium with Solvent Vapors. Macromolecules 2020; 53:8428-8437. [PMID: 33071358 PMCID: PMC7558291 DOI: 10.1021/acs.macromol.0c01637] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/11/2020] [Indexed: 12/13/2022]
Abstract
![]()
While
polymer brushes in contact with liquids have been researched
intensively, the characteristics of brushes in equilibrium with vapors
have been largely unexplored, despite their relevance for many applications,
including sensors and smart adhesives. Here, we use molecular dynamics
simulations to show that solvent and polymer density distributions
for brushes exposed to vapors are qualitatively different from those
of brushes exposed to liquids. Polymer density profiles for vapor-solvated
brushes decay more sharply than for liquid-solvated brushes. Moreover,
adsorption layers of enhanced solvent density are formed at the brush–vapor
interface. Interestingly and despite all of these effects, we find
that solvent sorption in the brush is described rather well with a
simple mean-field Flory–Huggins model that incorporates an
entropic penalty for stretching of the brush polymers, provided that
parameters such as the polymer–solvent interaction parameter,
grafting density, and relative vapor pressure are varied individually.
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Affiliation(s)
- Guido C Ritsema van Eck
- Materials Science and Technology of Polymers, University of Twente, Enschede 7522 NB, The Netherlands
| | - Lars B Veldscholte
- Materials Science and Technology of Polymers, University of Twente, Enschede 7522 NB, The Netherlands
| | - Jan H W H Nijkamp
- Materials Science and Technology of Polymers, University of Twente, Enschede 7522 NB, The Netherlands
| | - Sissi de Beer
- Materials Science and Technology of Polymers, University of Twente, Enschede 7522 NB, The Netherlands
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21
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Brió
Pérez M, Cirelli M, de Beer S. Degrafting of Polymer Brushes by Exposure to Humid Air. ACS APPLIED POLYMER MATERIALS 2020; 2:3039-3043. [PMID: 34124685 PMCID: PMC8192051 DOI: 10.1021/acsapm.0c00474] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 07/08/2020] [Indexed: 05/22/2023]
Abstract
It is well-known that polymer brushes can degraft in aqueous liquids. Here we show that brushes can deteriorate in humid air too. We observe that the detachment rate of the brushes increases with increasing relative humidity and hydrophilicity of the brushes. We relate this to the increase in water absorption as these parameters are increased. Our results imply that protective measures that are at present being developed for applications of brushes in liquids will also be key in enabling the long-term storage and utilization of hydrophilic brushes in air.
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Affiliation(s)
- Maria Brió
Pérez
- Materials Science and Technology of
Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Marco Cirelli
- Materials Science and Technology of
Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Sissi de Beer
- Materials Science and Technology of
Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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22
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Higaki Y, Kobayashi M, Takahara A. Hydration State Variation of Polyzwitterion Brushes through Interplay with Ions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9015-9024. [PMID: 32677837 DOI: 10.1021/acs.langmuir.0c01672] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Polyzwitterions have emerged as a new class of antifouling materials alternating poly(ethylene glycol). The exemplary biopassivation and lubrication behaviors are often attributed to the particular chemical structure of zwitterions, which involve a large dipole moment of the charged groups and a neutral net charge, while the hydration state and dynamics also associate with these characteristics. Polymer brushes composed of surface-tethered polyzwitterion chains produced by surface-initiated controlled radical polymerization have been developed as thin films which exhibit excellent antifouling and lubrication properties. In past decades, numerous studies have been devoted to examining the structure and dynamics of polyzwitterion brush chains in aqueous solutions. This feature article provides an overview of recent studies exploring the hydration state of polyzwitterion brushes with specular neutron reflectivity, highlights some newly published work on the nonuniform equilibrium structure, ion concentration dependence, ion specificity, and the effects of charge spacer length in the zwitterions, and discusses future perspective in this field.
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Affiliation(s)
- Yuji Higaki
- Department of Integrated Science and Technology, Faculty of Science and Technology, Oita University, 700 Dannoharu, Oita 870-1192, Japan
| | - Motoyasu Kobayashi
- School of Advanced Engineering, Kogakuin University, Tokyo 192-0015, Japan
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23
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Qu R, Ren Z, Li N, Zhang F, Zhang ZJ, Zhang H. Solvent-Free cycloaddition of carbon dioxide and epichlorohydrin catalyzed by surface-attached imidazolium-type poly(ionic liquid) monolayers. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2020.01.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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24
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Koufakis E, Manouras T, Anastasiadis SH, Vamvakaki M. Film Properties and Antimicrobial Efficacy of Quaternized PDMAEMA Brushes: Short vs Long Alkyl Chain Length. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3482-3493. [PMID: 32168453 DOI: 10.1021/acs.langmuir.9b03266] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Quaternized poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes bearing quaternary ammonium groups of different alkyl chain lengths (ACLs) were prepared and assessed as biocidal coatings. For the synthesis of the antimicrobial brushes, first well-defined PDMAEMA chains were grown by surface-initiated atom transfer radical polymerization on glass and silicon substrates. Next, the tertiary amine groups of the polymer brushes were modified via a quaternization reaction, using alkyl halides, to obtain the cationic polymers. The polymer films were characterized by Fourier-transform infrared spectroscopy, ellipsometry, atomic force microscopy, and water contact angle measurements. The effect of the ACL of the quaternary ammonium groups on the physicochemical properties of the films as well as the contact killing efficiency of the surfaces against representative Gram-positive and Gram-negative bacteria was investigated. A hydrophilic to hydrophobic transition of the surfaces and a significant decrease of the degree of quaternization of the DMAEMA moieties was found upon increasing the ACL of the quaternization agent above six carbon atoms, allowing the wettability, the thickness, and the pH-response of the brushes to be tuned via a facile postpolymerization, quaternization reaction. At the same time, antimicrobial tests revealed that the hydrophilic polymer brushes exhibited enhanced bactericidal activity against Escherichia coli and Bacillus cereus, whereas the hydrophobic surfaces showed a significant deterioration of the in vitro bactericidal performance. Our results elucidate the antimicrobial action of quaternized polymer brushes, dictating the appropriate choice of the ACL of the quaternization agent for the development of coatings that effectively inhibit biofilm formation on surfaces.
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Affiliation(s)
- Eleftherios Koufakis
- Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 700 13 Heraklion, Crete, Greece
- Department of Materials Science and Technology, University of Crete, 700 13 Heraklion, Crete, Greece
| | - Theodore Manouras
- Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 700 13 Heraklion, Crete, Greece
| | - Spiros H Anastasiadis
- Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 700 13 Heraklion, Crete, Greece
- Department of Chemistry, University of Crete, 700 13 Heraklion, Crete, Greece
| | - Maria Vamvakaki
- Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 700 13 Heraklion, Crete, Greece
- Department of Materials Science and Technology, University of Crete, 700 13 Heraklion, Crete, Greece
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25
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Zhang K, Huang H, Hung HC, Leng C, Wei S, Crisci R, Jiang S, Chen Z. Strong Hydration at the Poly(ethylene glycol) Brush/Albumin Solution Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2030-2036. [PMID: 32091913 DOI: 10.1021/acs.langmuir.9b03680] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Albumin molecules are extensively used as biocompatible coatings, and poly(ethylene glycol) (PEG) materials are widely used for antifouling. PEG materials have excellent antifouling property because of their strong surface hydration. Our previous research indicates that hydration at the PEG/bovine serum albumin solution interface is stronger than that at the PEG/water interface. This research shows that this observation is general for different types of albumin molecules. Different albumins including bovine, porcine, rat, rabbit, and sheep serum albumins were studied in this research. It was found that the hydration at the PEG methacrylate (pOEGMA)/albumin solution interface is always stronger than that at the pOEGMA/water interface. Here, we define "strong interfacial hydration" as "ordered strongly hydrogen-bonded interfacial water". We believe that such a strong hydration is because of the strong hydration on the albumin surface, leading to its biocompatible property. All of the albumin molecules demonstrated stronger hydration on the pOEGMA surface compared to other protein molecules such as lysozyme and fibrinogen. The strong hydration on albumin molecules is related to the high surface coverage of glutamic acid and lysine with similar amounts.
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Affiliation(s)
- Kexin Zhang
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Hao Huang
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Hsiang-Chieh Hung
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Chuan Leng
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Shuai Wei
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Ralph Crisci
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Shaoyi Jiang
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Zhan Chen
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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26
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The Inhibition of Icing and Frosting on Glass Surfaces by the Coating of Polyethylene Glycol and Polypeptide Mimicking Antifreeze Protein. Biomolecules 2020; 10:biom10020259. [PMID: 32050479 PMCID: PMC7072262 DOI: 10.3390/biom10020259] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 01/19/2020] [Accepted: 02/06/2020] [Indexed: 11/30/2022] Open
Abstract
The development of anti-icing, anti-frosting transparent plates is important for many reasons, such as poor visibility through the ice-covered windshields of vehicles. We have fabricated new glass surfaces coated with polypeptides which mimic a part of winter flounder antifreeze protein. We adopted glutaraldehyde and polyethylene glycol as linkers between these polypeptides and silane coupling agents applied to the glass surfaces. We have measured the contact angle, the temperature of water droplets on the cooling surfaces, and the frost weight. In addition, we have conducted surface roughness observation and surface elemental analysis. It was found that peaks in the height profile, obtained with the atomic force microscope for the polypeptide-coated surface with polyethylene glycol, were much higher than those for the surface without the polypeptide. This shows the adhesion of many polypeptide aggregates to the polyethylene glycol locally. The average supercooling temperature of the droplet for the polypeptide-coated surface with the polyethylene glycol was lower than for the polypeptide-coated surface with glutaraldehyde and the polyethylene-glycol-coated surface without the polypeptide. In addition, the average weight of frost cover on the specimen was lowest for the polypeptide-coated surface with the polyethylene glycol. These results argue for the effects of combined polyethylene glycol and polypeptide aggregates on the locations of ice nuclei and condensation droplets. Thus, this polypeptide-coating with the polyethylene glycol is a potential contender to improve the anti-icing and anti-frosting of glasses.
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27
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Zhang C, Parada GA, Zhao X, Chen Z. Probing Surface Hydration and Molecular Structure of Zwitterionic and Polyacrylamide Hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13292-13300. [PMID: 31553882 DOI: 10.1021/acs.langmuir.9b02544] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A hydrogel is a hydrophilic cross-linked polymer network which can contain a large amount of water. Hydrogels with distinguished interfacial physical toughness were analyzed for their potential application as antifouling coating materials, utilizing sum frequency generation (SFG) spectroscopy as the interfacial analytical technique. The surface structures of one sulfobetaine (SBMA) zwitterionic hydrogel (ZWHG) and two polysaccharide hydrogels (PHGs) were probed in air; their interfacial structures with silica were examined using SFG in water and protein solutions, respectively. Both ZWHG and PHGs interfaces in water were dominated by strongly hydrogen-bonded water molecules, but the bonding strength associated with ZWHG was much stronger. Although all hydrogels experienced interfacial change in the presence of protein solutions, after cleaning, the zwitterionic hydrogel interface recovered almost completely while the other two hydrogels were subject to irreversible protein adsorption. Additionally, orientational analysis of ZWHG methyl groups in water was conducted and related to the superior hydrogen-bonding strength of water molecules at the ZWHG interface. The interfacial structures of hydrogel materials probed by SFG can be correlated to their antifouling properties. This research highlighted the critical role that hydrogen-bonding strength of interfacial water molecules play for antifouling applications.
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Affiliation(s)
- Chengcheng Zhang
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
| | - German Alberto Parada
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Xuanhe Zhao
- Department of Mechanic Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Zhan Chen
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
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28
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Ahn E, Gaiji H, Kim T, Abderrabba M, Lee HW, Kim BS. Graphene oxide nanosheet as a two-dimensional polyelectrolyte: pH-responsive behavior of a multilayered nanomembrane. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.05.035] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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29
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Guo S, Quintana R, Cirelli M, Toa ZSD, Arjunan Vasantha V, Kooij ES, Jańczewski D, Vancso GJ. Brush Swelling and Attachment Strength of Barnacle Adhesion Protein on Zwitterionic Polymer Films as a Function of Macromolecular Structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8085-8094. [PMID: 31099575 PMCID: PMC6587155 DOI: 10.1021/acs.langmuir.9b00918] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/15/2019] [Indexed: 06/09/2023]
Abstract
The exceptional hydration of sulfobetaine polymer brushes and their resistance toward nonspecific protein absorption allows for the construction of thin films with excellent antibiofouling properties. In this work, swollen sulfobetaine brushes, prepared by surface-initiated atom transfer radical polymerization of two monomers, differentiated by the nature of the polymerizable group, are studied and compared by a liquid-cell atomic force microscopy technique and spectroscopic ellipsometry. Colloidal AFM-based force spectroscopy is employed to estimate brush grafting density and characterize nanomechanical properties in salt water. When the ionic strength-induced swelling behaviors of the two systems are compared, the differences observed on the antipolyelectrolyte response can be correlated with the stiffness variation on brush compression, likely to be promoted by solvation differences. The higher solvation of amide groups is proposed to be responsible for the lower adhesion force of the barnacle cyprid's temporary adhesive proteins. The adhesion results provide further insights into the antibiofouling activity against barnacle cyprid settlement attributed to polysulfobetaine brushes.
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Affiliation(s)
- Shifeng Guo
- Institute
of Materials Research and Engineering A*STAR (Agency for Science,
Technology and Research), Innovis, #08-03, 2 Fusionpolis Way, Singapore 138634
- CAS
Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese
Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Robert Quintana
- Institute
of Materials Research and Engineering A*STAR (Agency for Science,
Technology and Research), Innovis, #08-03, 2 Fusionpolis Way, Singapore 138634
- Materials
Research and Technology Department, Luxembourg
Institute of Science and Technology (LIST), L-4422 Belvaux, Luxembourg
| | - Marco Cirelli
- Materials Science and Technology of Polymers, MESA+
Institute for
Nanotechnology, Faculty Engineering Technology, Production Technology, and Physics of Interfaces
and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Zi Siang Desmond Toa
- Institute
of Materials Research and Engineering A*STAR (Agency for Science,
Technology and Research), Innovis, #08-03, 2 Fusionpolis Way, Singapore 138634
| | - Vivek Arjunan Vasantha
- Institute
of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, Jurong
Island, Singapore 627833
| | - E. Stefan Kooij
- Materials Science and Technology of Polymers, MESA+
Institute for
Nanotechnology, Faculty Engineering Technology, Production Technology, and Physics of Interfaces
and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Dominik Jańczewski
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - G. Julius Vancso
- Institute
of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, Jurong
Island, Singapore 627833
- Materials Science and Technology of Polymers, MESA+
Institute for
Nanotechnology, Faculty Engineering Technology, Production Technology, and Physics of Interfaces
and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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30
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Zhu YL, Lu ZY, Li ZW, Sun ZY, Liu X. Effect of the Self-Assembled Structures of Hydrated Polyzwitterionic and Polyanionic Brushes on Their Self-Cleaning Capabilities. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:6669-6675. [PMID: 31034239 DOI: 10.1021/acs.langmuir.9b00714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The capability of polyelectrolyte brushes to spontaneously clean oil fouling via water is determined by factors including water wettability and the self-assembled structures of hydrated polyelectrolytes. Although the charged groups of polyelectrolytes provide the original source of water wettability, the self-assembled structures play a significant role in the self-cleaning performances. Here, we employ coarse-grained molecular dynamics simulations to study the general self-cleaning characteristics of two types of surface-grafted polyelectrolyte brushes (i.e., zwitterionic and anionic polyelectrolytes). It has been found that the high grafting density is favorable to fouling reduction for both polyzwitterions and polyanions. To be specific, the hydrated polyzwitterions form an intermolecular cross-linked network via zwitterionic complexes, resulting in better self-cleaning capabilities than the polyanions at lower grafting densities. However, polyanions form bundles with each consisting of several chains via hydrophobic interactions and electrostatic repulsions presenting better self-cleaning performances than the polyzwitterions at higher grafting densities.
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Affiliation(s)
- You-Liang Zhu
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022 , China
- University of Science and Technology of China , Hefei 230026 , China
| | | | - Zhan-Wei Li
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022 , China
- University of Science and Technology of China , Hefei 230026 , China
| | - Zhao-Yan Sun
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022 , China
- University of Science and Technology of China , Hefei 230026 , China
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31
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Santos DES, Li D, Ramstedt M, Gautrot JE, Soares TA. Conformational Dynamics and Responsiveness of Weak and Strong Polyelectrolyte Brushes: Atomistic Simulations of Poly(dimethyl aminoethyl methacrylate) and Poly(2-(methacryloyloxy)ethyl trimethylammonium chloride). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5037-5049. [PMID: 30869897 DOI: 10.1021/acs.langmuir.8b04268] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The complex solution behavior of polymer brushes is key to control their properties, including for biomedical applications and catalysis. The swelling behavior of poly(dimethyl aminoethyl methacrylate) (PDMAEMA) and poly(2-(methacryloyloxy)ethyl trimethylammonium chloride) (PMETAC) in response to changes in pH, solvent, and salt types has been investigated using atomistic molecular dynamics simulations. PDMAEMA and PMETAC have been selected as canonical models for weak and strong polyelectrolytes whose complex conformational behavior is particularly challenging for the development and validation of atomistic models. The GROMOS-derived atomic parameters reproduce the experimental swelling coefficients obtained from ellipsometry measurements for brushes of 5-15 nm thickness. The present atomistic models capture the protonated morphology of PDMAEMA, the swollen and collapsed conformations of PDMAEMA and PMETAC in good and bad solvents, and the salt-selective response of PMETAC. The modular nature of the molecular models allows for the simple extension of atomic parameters to a variety of polymers or copolymers.
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Affiliation(s)
- Denys E S Santos
- Departamento de Química Fundamental , Universidade Federal de Pernambuco , Cidade Universitária, 50670-901 Recife , Brazil
| | | | | | | | - Thereza A Soares
- Departamento de Química Fundamental , Universidade Federal de Pernambuco , Cidade Universitária, 50670-901 Recife , Brazil
- Department of Chemistry , Umeå University , 90187 Umeå , Sweden
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32
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Han X, Leng C, Shao Q, Jiang S, Chen Z. Absolute Orientations of Water Molecules at Zwitterionic Polymer Interfaces and Interfacial Dynamics after Salt Exposure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1327-1334. [PMID: 30457875 DOI: 10.1021/acs.langmuir.8b01515] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nonfouling zwitterionic polymers have wide applications ranging from the naval industry to biomedical engineering. Strong hydration at polymer surfaces has been proven to be crucial to their nonfouling property, but the absolute orientations of water molecules on the polymers and the competition between water and salt binding have not been elucidated. In this work, the absolute orientations of water molecules on two zwitterionic polymer brushes, poly(carboxybetaine methacrylate) (pCBMA) and poly(sulfobetaine methacrylate) (pSBMA), were measured using regular and phase-sensitive sum frequency generation (SFG) vibrational spectroscopy. The pH-dependent studies in a pH range from 2 to 12 showed that at a pH of 7, the water absolute orientations are different on the pCBMS and pSBMA surfaces. Phase-sensitive SFG studies confirmed the results obtained from the pH-dependent measurements. Salt effects on the hydration of zwitterionic polymers were examined as a function of time, which indicated that the pCBMA surface and the associated interfacial water exhibit a slow restructuring process after salt binding (likely due to the strong binding of pCBMA with water), whereas the surface of pSBMA and the associated water have a fast change after salt binding.
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Affiliation(s)
- Xiaofeng Han
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, National Demonstration Center for Experimental Biomedical Engineering Education , Southeast University , Nanjing 210096 , China
| | - Chuan Leng
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Qing Shao
- Department of Chemical Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - Shaoyi Jiang
- Department of Chemical Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - Zhan Chen
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
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33
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Sakamaki T, Inutsuka Y, Igata K, Higaki K, Yamada NL, Higaki Y, Takahara A. Ion-Specific Hydration States of Zwitterionic Poly(sulfobetaine methacrylate) Brushes in Aqueous Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1583-1589. [PMID: 30441903 DOI: 10.1021/acs.langmuir.8b03104] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The ion-specific hydration states of zwitterionic poly(3-( N-2-methacryloyloxyethyl- N, N-dimethyl)ammonatopropanesulfonate) (PMAPS) brushes in various aqueous solutions were investigated by neutron reflectivity (NR) and atomic force microscopy (AFM). The asymmetric hydration state of the PMAPS brushes was verified from the NR scattering-length density profiles, while the variation in their swollen thickness was complementary as determined from AFM topographic images. PMAPS brushes got thicker in any salt solutions, while the extent of swelling and the dimensions of swollen chain structure were dependent on the ion species and salt concentration in the solutions. Anion specificity was clearly observed, whereas cations exhibited weaker modulation in ion-specific hydration states. The anion specificity could be ascribed to ion-specific interactions between the quaternary ammonium cation in sulfobetaine and the anions. The weak cation specificity was attributed to the intrinsically weak cohesive interactions between the weakly hydrated sulfonate anion in sulfobetaine and the strongly hydrated cations. The ion-specific hydration of PMAPS brushes was largely consistent with the ion-specific aggregation state of the PMAPS chains in aqueous solutions.
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Affiliation(s)
| | | | | | | | - Norifumi L Yamada
- Neutron Science Laboratory , High Energy Accelerator Research Organization , Ibaraki 319-1106 , Japan
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34
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Gumerov RA, Potemkin II. Swelling of Planar Polymer Brushes in Solvent Vapors. POLYMER SCIENCE SERIES C 2018. [DOI: 10.1134/s181123821802011x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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35
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Toledo L, Racine L, Pérez V, Henríquez JP, Auzely-Velty R, Urbano BF. Physical nanocomposite hydrogels filled with low concentrations of TiO2 nanoparticles: Swelling, networks parameters and cell retention studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 92:769-778. [DOI: 10.1016/j.msec.2018.07.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 06/05/2018] [Accepted: 07/09/2018] [Indexed: 12/24/2022]
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36
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Boyaciyan D, Braun L, Löhmann O, Silvi L, Schneck E, von Klitzing R. Gold nanoparticle distribution in polyelectrolyte brushes loaded at different pH conditions. J Chem Phys 2018; 149:163322. [DOI: 10.1063/1.5035554] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Dikran Boyaciyan
- Soft Matter at Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Straße 10, 64287 Darmstadt,
Germany
| | - Larissa Braun
- Soft Matter at Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Straße 10, 64287 Darmstadt,
Germany
| | - Oliver Löhmann
- Soft Matter at Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Straße 10, 64287 Darmstadt,
Germany
| | - Luca Silvi
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin,
Germany
| | - Emanuel Schneck
- Max Planck Institute of Colloids and Interfaces, Department of Biomaterials, Am Mühlenberg 1, 14476 Potsdam,
Germany
| | - Regine von Klitzing
- Soft Matter at Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Straße 10, 64287 Darmstadt,
Germany
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37
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Xu X, Billing M, Ruths M, Klok HA, Yu J. Structure and Functionality of Polyelectrolyte Brushes: A Surface Force Perspective. Chem Asian J 2018; 13:3411-3436. [PMID: 30080310 DOI: 10.1002/asia.201800920] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Indexed: 11/11/2022]
Abstract
The unique functionality of polyelectrolyte brushes depends on several types of specific interactions, including solvent structure effects, hydrophobic forces, electrostatic interactions, and specific ion interactions. Subtle variations in the solution environment can lead to conformational and surface structural changes of the polyelectrolyte brushes, which are mainly discussed from a surface-interaction perspective in this Focus Review. A brief overview is given of recent theoretical and experimental progress in the structure of polyelectrolyte brushes in various environments. Two important techniques for surface-force measurements are described, the surface forces apparatus (SFA) and atomic force microscopy (AFM), and some recent results on polyelectrolyte brushes are shown. Lastly, this Focus Review highlights the use of these surface-grafted polyelectrolyte brushes in the creation of functional surfaces for various applications, including nonfouling surfaces, boundary lubricants, and stimuli-responsive surfaces.
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Affiliation(s)
- Xin Xu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.,Department of Chemistry, University of Massachusetts Lowell, Lowell, MA, 01854, USA
| | - Mark Billing
- Institut des Matériaux et Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères, École Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015, Lausanne, Switzerland
| | - Marina Ruths
- Department of Chemistry, University of Massachusetts Lowell, Lowell, MA, 01854, USA
| | - Harm-Anton Klok
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.,Institut des Matériaux et Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères, École Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015, Lausanne, Switzerland
| | - Jing Yu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
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38
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Maiti D, Chao Y, Dong Z, Yi X, He J, Liu Z, Yang K. Development of a thermosensitive protein conjugated nanogel for enhanced radio-chemotherapy of cancer. NANOSCALE 2018; 10:13976-13985. [PMID: 30010686 DOI: 10.1039/c8nr03986k] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Although chemo-radiotherapy has been widely applied in clinics for cancer treatment, current strategies still face many challenges including serious side-effects and drug resistance. Herein, we develop a chemically cross-linked poly-N,N'-dimethyl aminoethyl methacrylate (PDMAEMA) smart nanogel as an excellent thermosensitive nanocarrier to load both an anticancer drug, doxorubicin (DOX) and a radioisotope, 131I-labeled albumin, for enhanced chemo-radioisotope therapy. Such a PDMAEMA nanogel in the solution form at room temperature can be easily injected into a tumor, in which it would be transformed into a gel at body temperature. Sustained drug release occurs in the tumor owing to the pH sensitive switching activity of the nanogel. In addition, the in situ thermogelling behavior of PDMAEMA leads to the long-term retention of 131I-labeled albumin within the tumor. In vivo chemo-radiotherapy is then conducted, achieving excellent therapeutic efficacy due to the sustained drug release and 131I retention for a long time in the cancer lesions. Our newly developed strategy of using a thermosensitive polymer for enhancing chemo-radiotherapy may be considered as a promising platform for combined cancer therapy without inducing obvious side-effects compared to the traditional chemo or radiotherapy.
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Affiliation(s)
- Debabrata Maiti
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Yu Chao
- Institute of Functional Nano & Soft Materials (FUNSOM), & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Ziliang Dong
- Institute of Functional Nano & Soft Materials (FUNSOM), & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Xuan Yi
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Jinlin He
- College of Chemistry, Soochow University, Suzhou, Jiangsu 215123, China
| | - Zhuang Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Kai Yang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China.
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39
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Zhao B, Yuan G, Chu X, Yang J, Zhao J. Response of a Permanently Charged Polyelectrolyte Brush to External Ions: The Aspects of Structure and Dynamics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6757-6765. [PMID: 29781623 DOI: 10.1021/acs.langmuir.8b01195] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Structure and dynamics inside permanently charged polyelectrolyte brushes, sodium polystyrene sulfonate brushes, during their response to the introduction of external ions (NaCl) are investigated by neutron reflectivity and dielectric spectroscopy. Neutron reflectivity measurements show that the segmental density of the inner part of the brushes decreases and that of the outer part increases when the salt level is tuned from the salt-free condition to a moderate level (<10-2 M)-the brushes swell further compared with the salt-free condition. This is attributed to the breakup of the multiplets formed by dipole-dipole pairs, and by this process, the previously constrained chain segments by the multiplets are released. Dielectric spectroscopy discovers a giant dipole by the charge separation of the adsorbed counterions and the PSS- chains, induced by electric field. The dynamics of the induced giant dipole is accelerated with the increase of external salt, as a result of the charge regularization by elevated salt level. At high-enough salt level, the screening effect reduces the electrostatic repulsion between the neighboring chains and makes the brushes shrink.
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Affiliation(s)
- Bintao Zhao
- Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Guangcui Yuan
- Center for Neutron Research , National Institute of Standards and Technology , Gaithersburg , Maryland 20899 , United States
| | - Xiao Chu
- Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Jingfa Yang
- Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Jiang Zhao
- Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
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40
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Leng C, Huang H, Zhang K, Hung HC, Xu Y, Li Y, Jiang S, Chen Z. Effect of Surface Hydration on Antifouling Properties of Mixed Charged Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6538-6545. [PMID: 29733605 DOI: 10.1021/acs.langmuir.8b00768] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Interfacial water structure on a polymer surface in water (or surface hydration) is related to the antifouling activity of the polymer. Zwitterionic polymer materials exhibit excellent antifouling activity due to their strong surface hydration. It was proposed to replace zwitterionic polymers using mixed charged polymers because it is much easier to prepare mixed charged polymer samples with much lower costs. In this study, using sum frequency generation (SFG) vibrational spectroscopy, we investigated interfacial water structures on mixed charged polymer surfaces in water and how such structures change while being exposed to salt solutions and protein solutions. The 1:1 mixed charged polymer exhibits excellent antifouling property whereas other mixed charged polymers with different ratios of the positive/negative charges do not. It was found that on the 1:1 mixed charged polymer surface, SFG water signal is dominated by the contribution of the strongly hydrogen bonded water molecules, indicating strong hydration of the polymer surface. The responses of the 1:1 mixed charged polymer surface to salt solutions are similar to those of zwitterionic polymers. Interestingly, exposure to high concentrations of salt solutions leads to stronger hydration of the 1:1 mixed charged polymer surface after replacing the salt solution with water. Protein molecules do not substantially perturb the interfacial water structure on the 1:1 mixed charged polymer surface and do not adsorb to the surface, showing that this mixed charged polymer is an excellent antifouling material.
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Affiliation(s)
- Chuan Leng
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Hao Huang
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Kexin Zhang
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Hsiang-Chieh Hung
- Department of Chemical Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - Yao Xu
- Department of Chemical Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - Yaoxin Li
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Shaoyi Jiang
- Department of Chemical Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - Zhan Chen
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
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41
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Ederth T, Ekblad T. Swelling of Thin Poly(ethylene glycol)-Containing Hydrogel Films in Water Vapor-A Neutron Reflectivity Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5517-5526. [PMID: 29672068 DOI: 10.1021/acs.langmuir.8b00177] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Hydrogels are widely used in biomedicine and for bioanalytical purposes, normally under wet conditions. For certain applications, processing steps, or process monitoring, hydrogel films are used or treated under ambient conditions, and because they are hygroscopic, it is of interest to investigate how they respond to changes in atmospheric humidity. We have used neutron reflectometry to follow the swelling of thin UV-polymerized hydrogel films in air under different relative humidities (RHs). These polymers were prepared to similar thicknesses on silica and gold substrates, and the chemical similarity between them was verified by infrared spectroscopy. The swelling in response to variations in RH was different for the layers on the two substrate types, reflecting structural changes induced by differences in the UV exposure required to achieve a given polymer thickness, as demonstrated also by differences in the Flory-Huggins interaction parameter, obtained by fitting a Flory-Huggins-type sorption model to the swelling data. Wetting studies show small changes in contact angles with surrounding humidity variations, indicating that structural reorganization at the interface in response to humidity changes is limited.
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Affiliation(s)
- Thomas Ederth
- Division of Molecular Physics, Department of Physics, Chemistry and Biology , Linköping University , SE-581 83 Linköping , Sweden
| | - Tobias Ekblad
- Division of Molecular Physics, Department of Physics, Chemistry and Biology , Linköping University , SE-581 83 Linköping , Sweden
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42
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Higaki Y, Inutsuka Y, Ono H, Yamada NL, Ikemoto Y, Takahara A. Counteranion-Specific Hydration States of Cationic Polyelectrolyte Brushes. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00210] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yuji Higaki
- Japan Science
and Technology Agency (JST), ERATO, Takahara Soft Interfaces Project, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | | | | | - Norifumi L. Yamada
- Neutron Science Laboratory, High Energy Accelerator Research Organization, Ibaraki 319-1106, Japan
| | - Yuka Ikemoto
- Japan Synchrotron Radiation
Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho,
Sayo-gun, Hyogo 679-5198, Japan
| | - Atsushi Takahara
- Japan Science
and Technology Agency (JST), ERATO, Takahara Soft Interfaces Project, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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43
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Yang Z, Zhang S, Tarabara VV, Bruening ML. Aqueous Swelling of Zwitterionic Poly(sulfobetaine methacrylate) Brushes in the Presence of Ionic Surfactants. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b01830] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Shouwei Zhang
- Department
of Chemical and Biomolecular Engineering and Department of Chemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | | | - Merlin L. Bruening
- Department
of Chemical and Biomolecular Engineering and Department of Chemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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44
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Micciulla S, Gerelli Y, Campbell RA, Schneck E. A Versatile Method for the Distance-Dependent Structural Characterization of Interacting Soft Interfaces by Neutron Reflectometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:789-800. [PMID: 29039954 DOI: 10.1021/acs.langmuir.7b02971] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Interactions between soft interfaces govern the behavior of emulsions and foams and crucially influence the functions of biological entities like membranes. To understand the character of these interactions, detailed insight into the interfaces' structural response in terms of molecular arrangements and conformations is often essential. This requires the realization of controlled interaction conditions and surface-sensitive techniques capable of resolving the structure of buried interfaces. Here, we present a new approach to determine the distance-dependent structure of interacting soft interfaces by neutron reflectometry. A solid/water interface and a water/oil interface are functionalized independently and initially macroscopically separated. They are then brought into contact and structurally characterized under interacting conditions. The nanometric distance between the two interfaces can be varied via the exertion of osmotic pressures. Our first experiments on lipid-anchored polymer brushes interacting across water with solid-grafted polyelectrolyte brushes and with bare silicon surfaces reveal qualitatively different interaction scenarios depending on the chemical composition of the two involved interfaces.
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Affiliation(s)
- Samantha Micciulla
- Max Planck Institute of Colloids and Interfaces , 14476 Potsdam, Germany
- Institut Laue-Langevin , 38000 Grenoble, France
| | | | | | - Emanuel Schneck
- Max Planck Institute of Colloids and Interfaces , 14476 Potsdam, Germany
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45
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Wang H, Jasensky J, Ulrich NW, Cheng J, Huang H, Chen Z, He C. Capsaicin-Inspired Thiol-Ene Terpolymer Networks Designed for Antibiofouling Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:13689-13698. [PMID: 29100465 DOI: 10.1021/acs.langmuir.7b03098] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Novel photocurable ternary polymer networks were prepared by incorporating N-(4-hydroxy-3-methoxybenzyl)-acrylamide (HMBA) into a cross-linked thiol-ene network based on poly(ethylene glycol)diacrylate (PEGDA) and (mercaptopropyl)methylsiloxane homopolymers (MSHP). The ternary network materials displayed bactericidal activity against Escherichia coli and Staphylococcus aureus and reduced the attachment of marine organism Phaeodactylum tricornutum. Extensive soaking of the polymer networks in aqueous solution indicated that no active antibacterial component leached out of the materials, and thus the ternary thiol-ene coating killed the bacteria by surface contact. The surface structures of the polymer networks with varied content ratios were studied by sum frequency generation (SFG) vibrational spectroscopy. The results demonstrated that the PDMS Si-CH3 groups and mimic-capsaicine groups are predominantly present at the polymer-air interface of the coatings. Surface reorganization was apparent after polymers were placed in contact with D2O: the hydrophobic PDMS Si-CH3 groups left the surface and returned to the bulk of the polymer networks, and the hydrophilic PEG chains cover the polymer surfaces in D2O. The capasaicine methoxy groups are able to segregate to the surface in an aqueous environment, depending upon the ratio of HMBA/PEGDA. SFG measurements in situ showed that the antibacterial HMBA chains, rather than the nonfouling PEG, played a dominant role in mediating the antibiofouling performance in this particular polymer system.
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Affiliation(s)
- Haiye Wang
- College of Materials Science and Engineering, Donghua University , Shanghai 201620, P. R. China
- Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Joshua Jasensky
- Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Nathan W Ulrich
- Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Junjie Cheng
- Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Hao Huang
- Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Zhan Chen
- Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Chunju He
- College of Materials Science and Engineering, Donghua University , Shanghai 201620, P. R. China
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46
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Li Y, Ko Y, Lin Y, Kiserow D, Genzer J. Enhanced Stability of Surface-Tethered Diblock Copolymer Brushes with a Neutral Polymer Block and a Weak Polyelectrolyte Block: Effects of Molecular Weight and Hydrophobicity of the Neutral Block. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01825] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yuanchao Li
- Department of Chemical &Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
- US Army Research
Office, Research Triangle Park, North Carolina 27709, United States
| | - Yeongun Ko
- Department of Chemical &Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Yiliang Lin
- Department of Chemical &Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Douglas Kiserow
- Department of Chemical &Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
- US Army Research
Office, Research Triangle Park, North Carolina 27709, United States
| | - Jan Genzer
- Department of Chemical &Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
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47
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Higaki Y, Inutsuka Y, Sakamaki T, Terayama Y, Takenaka A, Higaki K, Yamada NL, Moriwaki T, Ikemoto Y, Takahara A. Effect of Charged Group Spacer Length on Hydration State in Zwitterionic Poly(sulfobetaine) Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8404-8412. [PMID: 28737401 DOI: 10.1021/acs.langmuir.7b01935] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Effect of alkyl chain spacer length between the charged groups (CSL) in zwitterionic poly(sulfobetaine) (PSB) brushes on the hydration state was investigated. PSB brushes with ethyl (PMAES), propyl (PMAPS), or butyl (PMABS) CSL were prepared by surface-initiated atom transfer radical polymerization on silicon wafers. Hydration states of the PSB brushes in aqueous solutions and/or humid vapor were investigated by contact angle measurement, infrared spectroscopy, AFM observation, and neutron reflectivity. The PSB brushes are swollen in humid air and deionized water due to the hydration of the charged groups leading to the reduction of hydrated PSB brushes/water interfacial free energy. The hydrated PSB brushes exhibit clear interface with low interfacial roughness due to networking of the PSB brush chains through association of the SBs. The hydrated PSB brushes produce diffusive swollen layer in the presence of NaCl because of the charge screening followed by SB dissociation by the bound ions. The ionic strength sensitivity in the hydration got more significant with increasing the CSL in SBs because of the augmentation in partial charge by charged group separation.
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Affiliation(s)
- Yuji Higaki
- Institute for Materials Chemistry and Engineering, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Graduate School of Engineering, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO, Takahara Soft Interfaces Project, CE80, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshihiro Inutsuka
- Graduate School of Engineering, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tatsunori Sakamaki
- Graduate School of Engineering, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yuki Terayama
- Graduate School of Engineering, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Ai Takenaka
- Japan Science and Technology Agency (JST), ERATO, Takahara Soft Interfaces Project, CE80, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Keiko Higaki
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Norifumi L Yamada
- Neutron Science Laboratory, High Energy Accelerator Research Organization , Ibaraki 319-1106, Japan
| | - Taro Moriwaki
- Japan Synchrotron Radiation Research Institute/SPring-8 , 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Yuka Ikemoto
- Japan Synchrotron Radiation Research Institute/SPring-8 , 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Atsushi Takahara
- Institute for Materials Chemistry and Engineering, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Graduate School of Engineering, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO, Takahara Soft Interfaces Project, CE80, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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48
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Vacuum induced dehydration of swollen poly(methoxy diethylene glycol acrylate) and polystyrene-block-poly(methoxy diethylene glycol acrylate)-block-polystyrene films probed by in-situ neutron reflectivity. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.07.066] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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49
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Narayanan T, Wacklin H, Konovalov O, Lund R. Recent applications of synchrotron radiation and neutrons in the study of soft matter. CRYSTALLOGR REV 2017. [DOI: 10.1080/0889311x.2016.1277212] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | - Hanna Wacklin
- European Spallation Source ERIC, Lund, Sweden
- Physical Chemistry, Lund University, Lund, Sweden
| | | | - Reidar Lund
- Department of Chemistry, University of Oslo, Blindern, Oslo, Norway
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50
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Liu Z, He Z, Lv J, Jin Y, Wu S, Liu G, Zhou F, Wang J. Ion-specific ice propagation behavior on polyelectrolyte brush surfaces. RSC Adv 2017. [DOI: 10.1039/c6ra24847k] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Various hydration states of PB lead to a difference of ice propagation rate up to five orders of magnitude.
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Affiliation(s)
- Zhenqi Liu
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Zhiyuan He
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Jianyong Lv
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Yuankai Jin
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Shuwang Wu
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Guangming Liu
- Department of Chemical Physics
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- PR China
| | - Feng Zhou
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou
- PR China
| | - Jianjun Wang
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
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