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Ahmed ST, Madinya JJ, Leckband DE. Ionic strength dependent forces between end-grafted Poly(sulfobetaine) films and mica. J Colloid Interface Sci 2022; 606:298-306. [PMID: 34392027 DOI: 10.1016/j.jcis.2021.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/26/2021] [Accepted: 08/01/2021] [Indexed: 12/12/2022]
Abstract
The molecular surface properties of zwitterionic polymer coatings are central to their ultra-low fouling properties and effectiveness as steric stabilizers in concentrated salt solutions. Here, Surface Force Apparatus measurements quantified the molecular forces between end-grafted poly(sulfobetaine) methacrylate thin films and mica, as a function of the chain grafting density and ionic strength. These results demonstrate that, at the ionic strengths considered, end-grafted poly(sulfobetaine) films can be described by models for polymers in good solvent. Parameters determined from data fits to the Milner-Witten-Cates or Dolan and Edwards models for dense or dilute chains, respectively, varied with ionic strength, in ways that reflect poly(sulfobetaine) swelling and the increased excluded volume strength of chain segments. These force measurements provide new insight into how polymer coverage and salt cooperate to regulate repulsive poly(sulfobetaine) steric barriers. These findings have implications for the design of grafted poly(sulfobetaine) as colloidal stabilizers or nonfouling surface coatings.
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Affiliation(s)
- Syeda Tajin Ahmed
- Department of Chemical and Biomolecular Engineering, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA
| | - Jason J Madinya
- Department of Chemical and Biomolecular Engineering, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA
| | - Deborah E Leckband
- Department of Chemical and Biomolecular Engineering, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA; Department of Chemical and Biomolecular Engineering and Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA.
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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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Marets N, Kanno S, Ogata S, Ishii A, Kawaguchi S, Hasegawa M. Lanthanide-Oligomeric Brush Films: From Luminescence Properties to Structure Resolution. ACS OMEGA 2019; 4:15512-15520. [PMID: 31572852 PMCID: PMC6761684 DOI: 10.1021/acsomega.9b01775] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 08/22/2019] [Indexed: 05/17/2023]
Abstract
Lanthanide (Ln) based luminescent materials are experiencing an increasing interest in their applications in several fields. In this study, we report a series of new lanthanide-oligomeric brush films, supported on quartz substrates and prepared using a layer-by-layer method (LbL). Oligomeric brush films are composed of small oligomers from our previously reported coordination polymers [x-EuL] and [x-TbL] (with x = 1, 3, and 5 generations of Ln complexes), which are grown perpendicularly from a carboxylate self-assembled monolayer. Oligomers composed of our previously described helical lanthanide complex LnL (Ln: Eu and Tb) as a luminescent moiety and benzene-1,4-dicarboxylate acid (bdc) used as a linker. Mixed films having the fifth-generation Ln complexes composed of equimolar mixture of Eu and Tb ions were prepared. Oligomeric brush films are highly transparent and exhibited a colored emission under UV irradiation. Pure Ln (Eu or Tb) films showed a strong luminescence from the Ln ions. Their luminescent properties depended on the number of lanthanide layers in the films composed of the first to third generations of lanthanide complexes. Then, the increase of the complex layers induced no difference in the luminescent properties. An energy transfer from Tb to Eu ions in the mixed films indicated a short distance between lanthanide ions of a fifth layer. The structural analysis together with the observed luminescent properties and some previous studies allowed to clarify the disposition of the oligomers in the films.
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Affiliation(s)
- Nicolas Marets
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
| | - Shuhei Kanno
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
| | - Shuhei Ogata
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
| | - Ayumi Ishii
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
- JST,
PRESTO, Kawaguchi, Saitama 332-0012, Japan
- Toin University of Yokohama, Aoba-ku, Yokohama, Kanagawa 225-8508, Japan
| | - Shogo Kawaguchi
- Research
& Utilization Division, Japan Synchrotron
Radiation Research Institute (JASRI), Sayo, Hyogo 679-5198, Japan
| | - Miki Hasegawa
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
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Petroff MG, Garcia EA, Herrera-Alonso M, Bevan MA. Ionic Strength-Dependent Interactions and Dimensions of Adsorbed Zwitterionic Copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4976-4985. [PMID: 30889950 DOI: 10.1021/acs.langmuir.9b00218] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We report direct measurements of ionic strength-dependent interactions between different molecular weights of zwitterionic triblock copolymers adsorbed to hydrophobic colloids and surfaces. The zwitterionic copolymers investigated include phosphorylcholine [poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC)] and sulfopropylbetaine [poly(3-( N-2-methacryloyloxyethyl- N, N-dimethyl)ammonatopropanesulfonate) (PMAPS)] end blocks separated by poly(propylene oxide) center blocks. The range of repulsion between adsorbed PMAPS copolymer layers increases with increasing NaCl from 0.01 to 3 M, and layer thicknesses range from ∼50 to 100% of the PMAPS block contour length. In contrast, repulsion between PMPC layers does not change for 0.01-3 M NaCl, and layers remain near full extension at their contour length. NaCl-dependent interactions and inferred layer dimensions correlate with hydrodynamic layer thickness and polymer second virial coefficients. These results suggest that the interaction range and layer thickness of adsorbed zwitterionic copolymers arise from a balance of intramolecular dipolar attraction and repulsion possibly mediated by water solvation. The balance between these competing effects and resulting ionic strength dependence is determined by specific zwitterionic moieties.
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Affiliation(s)
- Matthew G Petroff
- Chemical & Biomolecular Engineering , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Elena A Garcia
- Chemical & Biomolecular Engineering , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Margarita Herrera-Alonso
- Chemical & Biological Engineering & School of Advanced Materials Discovery , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Michael A Bevan
- Chemical & Biomolecular Engineering , Johns Hopkins University , Baltimore , Maryland 21218 , United States
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Kikuchi M, Terayama Y, Ishikawa T, Hoshino T, Kobayashi M, Ohta N, Jinnai H, Takahara A. Salt Dependence of the Chain Stiffness and Excluded-Volume Strength for the Polymethacrylate-Type Sulfopropylbetaine in Aqueous NaCl Solutions. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01116] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Moriya Kikuchi
- ERATO,
Takahara Soft Interfaces Project, Japan Science and Technology Agency, 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
| | | | | | - Taiki Hoshino
- ERATO,
Takahara Soft Interfaces Project, Japan Science and Technology Agency, 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Motoyasu Kobayashi
- ERATO,
Takahara Soft Interfaces Project, Japan Science and Technology Agency, 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Noboru Ohta
- Japan Synchrotron
Radiation Research Institute/Spring-8, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Hiroshi Jinnai
- ERATO,
Takahara Soft Interfaces Project, Japan Science and Technology Agency, 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Atsushi Takahara
- ERATO,
Takahara Soft Interfaces Project, Japan Science and Technology Agency, 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
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Sundaram HS, Han X, Nowinski AK, Ella-Menye JR, Wimbish C, Marek P, Senecal K, Jiang S. One-step dip coating of zwitterionic sulfobetaine polymers on hydrophobic and hydrophilic surfaces. ACS APPLIED MATERIALS & INTERFACES 2014; 6:6664-71. [PMID: 24730392 DOI: 10.1021/am500362k] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Zwitterionic sulfobetaine polymers with a catechol chain end (DOPA-PSB) were applied to a variety of hydrophobic polymer sheets and fibers. In addition, a silica surface was tested as a representative hydrophilic substrate. The polymer-coated surfaces showed significantly lower fouling levels than uncoated controls. Because of the anti-polyelectrolyte nature of sulfobetaine zwitterionic polymers, the effect of salt concentration on the coating solutions and the quality of the polymer coating against fouling are studied. The coating method involves only water-based solutions, which is compatible with most surfaces and is environmentally friendly. To demonstrate the versatility of the reported method, we evaluated the fouling levels of the polymer coating on commonly used polymeric surfaces such as polypropylene (PP), polydimethylsiloxane (PDMS), polystyrene (PS), nylon, polyvinyl chloride (PVC), and poly(methyl methacrylate) (PMMA).
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Affiliation(s)
- Harihara S Sundaram
- Department of Chemical Engineering, University of Washington , Seattle, Washington 98195-1750, United States
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Kobayashi M, Terada M, Terayama Y, Kikuchi M, Takahara A. Direct Controlled Polymerization of Ionic Monomers by Surface-Initiated ATRP Using a Fluoroalcohol and Ionic Liquids. Isr J Chem 2012. [DOI: 10.1002/ijch.201100136] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kikuchi M, Terayama Y, Ishikawa T, Hoshino T, Kobayashi M, Ogawa H, Masunaga H, Koike JI, Horigome M, Ishihara K, Takahara A. Chain dimension of polyampholytes in solution and immobilized brush states. Polym J 2011. [DOI: 10.1038/pj.2011.116] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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