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Wang J, Kouznetsova TB, Xia J, Ángeles FJ, de la Cruz MO, Craig SL. A polyelectrolyte handle for single‐molecule force spectroscopy. JOURNAL OF POLYMER SCIENCE 2023. [DOI: 10.1002/pol.20230051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Affiliation(s)
- Junpeng Wang
- Department of Chemistry Duke University Durham North Carolina USA
| | | | - Jianshe Xia
- Department of Materials Science and Engineering Northwestern University Evanston Illinois USA
| | - Felipe Jiménez Ángeles
- Department of Materials Science and Engineering Northwestern University Evanston Illinois USA
| | | | - Stephen L. Craig
- Department of Chemistry Duke University Durham North Carolina USA
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2
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Limer A, Haddleton DM. Transition Metal Mediated Living Radical Polymerisation. PROGRESS IN REACTION KINETICS AND MECHANISM 2019. [DOI: 10.3184/007967404777726223] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Living radical polymerisation has witnessed an unprecedented interest from polymer and materials scientists. Traditionally, polymers tended to replace natural materials such as wood, cotton and glass, and were used primarily for their structural features and performance and cost advantages. New functional polymers are essential for the manufacture of cell phones, lap-top computers, new cosmetics, and many pharmaceuticals. It is important to be able to control how monomers are put together within the macromolecule for the design at the molecular level for specific applications. Living polymerisation allows for end group control, polymer chain length and relatively narrow polydispersity polymers. In nature, the ability to control monomer distribution and chain length is obvious with approximately 20 amino acids being the monomers for polymers as diverse as hair, insulin and haemoglobin. Living radical polymerisation solves many of the problems in the use of monomers that contain heteroatoms and functional groups. These tend to be reactive towards strong nucleophiles and electrophiles which are required in ionic polymerisation. Protecting group chemistry as used in small molecule organic synthesis is not practical in polymer synthesis. Thus radicals that are inert to most functional groups and in particular protic species seem to be the answer. The mechanism of the transition metal mediate systems is extremely complicated with a range of organometallic species present in the reaction mixture. Solvents and coordinating monomers drastically affect the ideal reaction conditions and it is impossible to predict the optimum conditions for each synthesis without certain experiments being carried out. Nevertheless, catalyst systems are available which are acceptable and work well enough to be able to make a plethora of different macromolecules for a diverse range of applications /properties.
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Affiliation(s)
- Adam Limer
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
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3
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Madyan OA, Fan M. Hydrophobic Clay Aerogel Composites through the Implantation of Environmentally Friendly Water-Repellent Agents. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02218] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Omar Abo Madyan
- Civil Engineering, College of Engineering, Design and Physical Sciences, Brunel University, London UB8 3PH, United Kingdom
| | - Mizi Fan
- Civil Engineering, College of Engineering, Design and Physical Sciences, Brunel University, London UB8 3PH, United Kingdom
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4
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Penfold NJW, Parnell AJ, Molina M, Verstraete P, Smets J, Armes SP. Layer-By-Layer Self-Assembly of Polyelectrolytic Block Copolymer Worms on a Planar Substrate. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14425-14436. [PMID: 29148796 PMCID: PMC5789390 DOI: 10.1021/acs.langmuir.7b03571] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 11/16/2017] [Indexed: 05/30/2023]
Abstract
Cationic and anionic block copolymer worms are prepared by polymerization-induced self-assembly via reversible addition-fragmentation chain transfer (RAFT) aqueous dispersion copolymerization of 2-hydroxypropyl methacrylate and glycidyl methacrylate (GlyMA), using a binary mixture of a nonionic poly(ethylene oxide) macromolecular RAFT agent and either a cationic poly([2-(methacryloyloxy)ethyl]trimethylammonium chloride) or an anionic poly(potassium 3-sulfopropyl methacrylate) macromolecular RAFT agent. In each case, covalent stabilization of the worm cores was achieved via reaction of the epoxide groups on the GlyMA repeat units with 3-mercaptopropyltriethoxysilane. Aqueous electrophoresis studies indicated a pH-independent mean zeta potential of +40 mV and -39 mV for the cationic and anionic copolymer worms, respectively. These worms are expected to mimic the rigid rod behavior of water-soluble polyelectrolyte chains in the absence of added salt. The kinetics of adsorption of the cationic worms onto a planar anionic silicon wafer was examined at pH 5 and was found to be extremely fast at 1.0 w/w % copolymer concentration in the absence of added salt. Scanning electron microscopy (SEM) analysis indicated that a relatively constant worm surface coverage of 16% was achieved at 20 °C for adsorption times ranging from just 2 s up to 2 min. Furthermore, the successive layer-by-layer deposition of cationic and anionic copolymer worms onto planar surfaces was investigated using SEM, ellipsometry, and surface zeta potential measurements. These techniques confirmed that the deposition of oppositely charged worms resulted in a monotonic increase in the mean layer thickness, with a concomitant surface charge reversal occurring on addition of each new worm layer. Unexpectedly, two distinct linear regimes were observed when plotting the mean layer thickness against the total number of adsorbed worm layers, with a steeper gradient (corresponding to thicker layers) being observed after the deposition of six worm layers.
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Affiliation(s)
- Nicholas J. W. Penfold
- Department
of Chemistry, The University of Sheffield,
Dainton Building, Brook
Hill, Sheffield S3 7HF, U.K.
| | - Andrew J. Parnell
- Department
of Physics & Astronomy, The University
of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, U.K.
| | - Marta Molina
- Department
of Chemistry, The University of Sheffield,
Dainton Building, Brook
Hill, Sheffield S3 7HF, U.K.
| | | | - Johan Smets
- Procter
& Gamble, Temselaan
100, 1853 Strombeek
Bever, Belgium
| | - Steven P. Armes
- Department
of Chemistry, The University of Sheffield,
Dainton Building, Brook
Hill, Sheffield S3 7HF, U.K.
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5
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Jiang L, Messing ME, Ye L. Temperature and pH Dual-Responsive Core-Brush Nanocomposite for Enrichment of Glycoproteins. ACS APPLIED MATERIALS & INTERFACES 2017; 9:8985-8995. [PMID: 28240025 DOI: 10.1021/acsami.6b15326] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this report, we present a novel modular approach to the immobilization of a high density of boronic acid ligands on thermoresponsive block copolymer brushes for effective enrichment of glycoproteins via their synergistic multiple covalent binding with the immobilized boronic acids. Specifically, a two-step, consecutive surface-initiated atom transfer radical polymerization (SI-ATRP) was employed to graft a flexible block copolymer brush, pNIPAm-b-pGMA, from an initiator-functionalized nanosilica surface, followed by postpolymerization modification of the pGMA moiety with sodium azide. Subsequently, an alkyne-tagged boronic acid (PCAPBA) was conjugated to the polymer brush via a Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) click reaction, leading to a silica-supported polymeric hybrid material, Si@pNIPAm-b-pBA, with a potent glycol binding affinity. The obtained core-brush nanocomposite was systematically characterized with regard to particle size, morphology, organic content, brush density, and number of immobilized boronic acids. We also studied the characteristics of glycoprotein binding of the nanocomposite under different conditions. The nanocomposite showed high binding capacities for ovalbumin (OVA) (98.0 mg g-1) and horseradish peroxidase (HRP) (26.8 mg g-1) in a basic buffer (pH 9.0) at 20 °C. More importantly, by adjusting the pH and temperature, the binding capacities of the nanocomposite can be tuned, which is meaningful for the separation of biological molecules. In general, the synthetic approach developed for the fabrication of block copolymer brushes in the nanocomposite opened new opportunities for the design of more functional hybrid materials that will be useful in bioseparation and biomedical applications.
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Affiliation(s)
- Lingdong Jiang
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University , Box 124, 221 00 Lund, Sweden
| | - Maria E Messing
- Division of Solid State Physics and NanoLund, Department of Physics, Lund University , Box 118, 221 00 Lund, Sweden
| | - Lei Ye
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University , Box 124, 221 00 Lund, Sweden
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6
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Zoppe JO, Ataman NC, Mocny P, Wang J, Moraes J, Klok HA. Surface-Initiated Controlled Radical Polymerization: State-of-the-Art, Opportunities, and Challenges in Surface and Interface Engineering with Polymer Brushes. Chem Rev 2017; 117:1105-1318. [PMID: 28135076 DOI: 10.1021/acs.chemrev.6b00314] [Citation(s) in RCA: 578] [Impact Index Per Article: 82.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The generation of polymer brushes by surface-initiated controlled radical polymerization (SI-CRP) techniques has become a powerful approach to tailor the chemical and physical properties of interfaces and has given rise to great advances in surface and interface engineering. Polymer brushes are defined as thin polymer films in which the individual polymer chains are tethered by one chain end to a solid interface. Significant advances have been made over the past years in the field of polymer brushes. This includes novel developments in SI-CRP, as well as the emergence of novel applications such as catalysis, electronics, nanomaterial synthesis and biosensing. Additionally, polymer brushes prepared via SI-CRP have been utilized to modify the surface of novel substrates such as natural fibers, polymer nanofibers, mesoporous materials, graphene, viruses and protein nanoparticles. The last years have also seen exciting advances in the chemical and physical characterization of polymer brushes, as well as an ever increasing set of computational and simulation tools that allow understanding and predictions of these surface-grafted polymer architectures. The aim of this contribution is to provide a comprehensive review that critically assesses recent advances in the field and highlights the opportunities and challenges for future work.
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Affiliation(s)
- Justin O Zoppe
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - Nariye Cavusoglu Ataman
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - Piotr Mocny
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - Jian Wang
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - John Moraes
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - Harm-Anton Klok
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
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7
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Poggi E, Ouvry W, Ernould B, Bourgeois JP, Chattopadhyay S, Du Prez F, Gohy JF. Preparation of Janus nanoparticles from block copolymer thin films using triazolinedione chemistry. RSC Adv 2017. [DOI: 10.1039/c7ra07924a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A nanostructured thin film obtained from a polystyrene-block-poly(4-vinylpyridine) diblock copolymer was used as a template to produce Janus-type nanoparticles via triazolinedione-ene click chemistry.
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Affiliation(s)
- Elio Poggi
- Institute of Condensed Matter and Nanosciences
- Division of Bio and Soft Matter
- Université catholique de Louvain
- B-1348 Louvain-la-Neuve
- Belgium
| | - Wolfgang Ouvry
- Institute of Condensed Matter and Nanosciences
- Division of Bio and Soft Matter
- Université catholique de Louvain
- B-1348 Louvain-la-Neuve
- Belgium
| | - Bruno Ernould
- Institute of Condensed Matter and Nanosciences
- Division of Bio and Soft Matter
- Université catholique de Louvain
- B-1348 Louvain-la-Neuve
- Belgium
| | - Jean-Pierre Bourgeois
- Institute of Condensed Matter and Nanosciences
- Division of Bio and Soft Matter
- Université catholique de Louvain
- B-1348 Louvain-la-Neuve
- Belgium
| | - Subrata Chattopadhyay
- Polymer Chemistry Research Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
| | - Filip Du Prez
- Polymer Chemistry Research Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
| | - J.-F. Gohy
- Institute of Condensed Matter and Nanosciences
- Division of Bio and Soft Matter
- Université catholique de Louvain
- B-1348 Louvain-la-Neuve
- Belgium
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8
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Synthesis and characterization of well-defined ligand-terminated block copolymer brushes for multifunctional biointerfaces. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.03.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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9
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Park CS, Lee HJ, Jamison AC, Lee TR. Robust Thick Polymer Brushes Grafted from Gold Surfaces Using Bidentate Thiol-Based Atom-Transfer Radical Polymerization Initiators. ACS APPLIED MATERIALS & INTERFACES 2016; 8:5586-5594. [PMID: 26841087 DOI: 10.1021/acsami.5b11305] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A new bromoisobutyrate-terminated alkanethiol, 16-(3,5-bis(mercaptomethyl)phenoxy)hexadecyl 2-bromo-2-methylpropanoate (BMTBM), was designed as a bidentate adsorbate to form thermally stable bromoisobutyrate-terminated self-assembled monolayers (SAMs) on flat gold surfaces to conduct atom-transfer radical polymerizations (ATRPs). The monolayers derived from BMTBM were characterized by ellipsometry, X-ray photoelectron spectroscopy (XPS), and polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS) and compared to the monolayers formed from 16-mercaptohexadecyl 2-bromo-2-methylpropanoate (MBM), 16-(3-(mercaptomethyl)phenoxy)hexadecyl 2-bromo-2-methyl-propanoate (MTBM), and octadecanethiol (C18SH). In this study, although the monolayer derived from BMTBM was less densely packed than those derived from MBM and MTBM, the bidentate adsorbates demonstrated much higher thermal stability in solution-phase thermal desorption tests, owing to the "chelate effect". The enhanced stability of the BMTBM SAMs ensured the development of thick brushes of poly(methyl methacrylate) and polystyrene at elevated temperatures (60, 90, 105, and 120 °C). In contrast, SAMs derived from MBM and MTBM failed to grow polymer brushes at temperatures above 100 °C.
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Affiliation(s)
- Chul Soon Park
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - Han Ju Lee
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - Andrew C Jamison
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - T Randall Lee
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
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10
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Xu B, Feng C, Hu J, Shi P, Gu G, Wang L, Huang X. Spin-Casting Polymer Brush Films for Stimuli-Responsive and Anti-Fouling Surfaces. ACS APPLIED MATERIALS & INTERFACES 2016; 8:6685-6692. [PMID: 26905980 DOI: 10.1021/acsami.5b12820] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Surfaces modified with amphiphilic polymers can dynamically alter their physicochemical properties in response to changes of their environmental conditions; meanwhile, amphiphilic polymer coatings with molecular hydrophilic and hydrophobic patches, which can mitigate biofouling effectively, are being actively explored as advanced coatings for antifouling materials. Herein, a series of well-defined amphiphilic asymmetric polymer brushes containing hetero side chains, hydrophobic polystyrene (PS) and hydrophilic poly(ethylene glycol) (PEG), was employed to prepare uniform thin films by spin-casting. The properties of these films were investigated by water contact angle, X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and quartz crystal microbalance (QCM). AFM showed smooth surfaces for all films with the roughness less than 2 nm. The changes in water contact angle and C/O ratio (XPS) evidenced the enrichment of PEG or PS chains at film surface after exposed to selective solvents, indicative of stimuli- responsiveness. The adsorption of proteins on PEG functionalized surface was quantified by QCM and the results verified that amphiphilic polymer brush films bearing PEG chains could lower or eliminate protein-material interactions and resist to protein adsorption. Cell adhesion experiments were performed by using HaCaT cells and it was found that polymer brush films possess good antifouling ability.
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Affiliation(s)
- Binbin Xu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Chun Feng
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Jianhua Hu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , 220 Handan Road, Shanghai 200433, People's Republic of China
| | - Ping Shi
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, People's Republic of China
| | - Guangxin Gu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , 220 Handan Road, Shanghai 200433, People's Republic of China
| | - Lei Wang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , 220 Handan Road, Shanghai 200433, People's Republic of China
| | - Xiaoyu Huang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, People's Republic of China
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11
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Song W, Granville AM. Surface Modification of Polydivinylbenzene Microspheres with a Fluorinated Glycopolymer Using Thiol-Halogen Click Chemistry. Methods Mol Biol 2016; 1367:123-35. [PMID: 26537469 DOI: 10.1007/978-1-4939-3130-9_10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Distillation-precipitation polymerization of divinylbenzene was applied to obtain uniform-sized polymeric microspheres. The microspheres were then modified with polypentafluorostyrene chains utilizing surface-initiated atom transfer radical polymerization techniques. The hydrophobic fluoropolymer-coated microsphere was then converted to a hydrophilic biopolymer by performing thiol-halogen click chemistry between polypentafluorostyrene and 1-thio-β-D-glucose sodium salt. The semi-fluorinated glycopolymer showed good binding ability with Concanavalin A as determined by confocal microscopy and turbidity experiments.
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Affiliation(s)
- Wentao Song
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, Australia, 2052
| | - Anthony M Granville
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, Australia, 2052.
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13
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Hvilsted S. The pentafluorostyrene endeavours with atom transfer radical polymerization-quo vadis? POLYM INT 2013. [DOI: 10.1002/pi.4613] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Søren Hvilsted
- Danish Polymer Centre, Department of Chemical and Biochemical Engineering; Technical University of Denmark; Building 227 DK-2800 Kgs. Lyngby Denmark
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14
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Hong-wen Z, Lin Z, Yan J, Min-yan Z, Qiang Y. PREPARATION AND CHARACTERIZATION OF GRAFTED POLYESTER FILMS BY FLUOROPOLYMER. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.12237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Coclite AM, Lund P, Di Mundo R, Palumbo F. Novel hybrid fluoro-carboxylated copolymers deposited by initiated chemical vapor deposition as protonic membranes. POLYMER 2013. [DOI: 10.1016/j.polymer.2012.11.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Cheesman BT, Smith EG, Murdoch TJ, Guibert C, Webber GB, Edmondson S, Wanless EJ. Polyelectrolyte brush pH-response at the silica–aqueous solution interface: a kinetic and equilibrium investigation. Phys Chem Chem Phys 2013; 15:14502-10. [DOI: 10.1039/c3cp52281d] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Peng H, Thurecht KJ, Blakey I, Taran E, Whittaker AK. Effect of Solvent Quality on the Solution Properties of Assemblies of Partially Fluorinated Amphiphilic Diblock Copolymers. Macromolecules 2012. [DOI: 10.1021/ma3019188] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hui Peng
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
| | - Kristofer J. Thurecht
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
| | - Idriss Blakey
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
| | - Elena Taran
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
| | - Andrew K. Whittaker
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
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18
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Cheesman BT, Willott JD, Webber GB, Edmondson S, Wanless EJ. pH-Responsive Brush-Modified Silica Hybrids Synthesized by Surface-Initiated ARGET ATRP. ACS Macro Lett 2012; 1:1161-1165. [PMID: 35607187 DOI: 10.1021/mz3003566] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Brush-modified silica hybrids have been synthesized by growing poly(2-(diethylamino)ethyl methacrylate) (poly(DEA)) brushes on 120 nm diameter silica particles by surface-initiated activators regenerated by electron transfer atom transfer radical polymerization (SI-ARGET ATRP). This is the first report of using SI-ARGET ATRP to synthesize poly(DEA) brushes. The kinetics of poly(DEA) brush growth in 4:1 v/v ethanol/water was monitored. The hydrodynamic diameter of the resulting brush-modified particles was dependent on the solution pH due to the weak polybasic nature of the brushes. Below the pKa of poly(DEA), the hydrodynamic diameter of the brush-modified particles increased with decreasing pH as a consequence of brush protonation, rearrangement and solvent uptake. This pH-response of the brushes was reversible and the hybrid particles exhibited significant hydrodynamic volume changes of up to 200% when the solution pH was cycled from pH 7 to pH 4.
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Affiliation(s)
- Benjamin T. Cheesman
- Priority Research
Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan,
NSW 2308, Australia
| | - Joshua D. Willott
- Priority Research
Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan,
NSW 2308, Australia
| | - Grant B. Webber
- Priority Research
Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan,
NSW 2308, Australia
| | - Steve Edmondson
- Department of Materials, Loughborough University, Loughborough,
LE11 3TU, United Kingdom
| | - Erica J. Wanless
- Priority Research
Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan,
NSW 2308, Australia
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19
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Li X, Prukop SL, Biswal SL, Verduzco R. Surface Properties of Bottlebrush Polymer Thin Films. Macromolecules 2012. [DOI: 10.1021/ma301046n] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Xianyu Li
- Department of Chemical
and Biomolecular Engineering, Rice University, 6100 Main Street, Houston, Texas 77005,
United States
| | - Stacy L. Prukop
- Department of Chemical
and Biomolecular Engineering, Rice University, 6100 Main Street, Houston, Texas 77005,
United States
| | - Sibani Lisa Biswal
- Department of Chemical
and Biomolecular Engineering, Rice University, 6100 Main Street, Houston, Texas 77005,
United States
| | - Rafael Verduzco
- Department of Chemical
and Biomolecular Engineering, Rice University, 6100 Main Street, Houston, Texas 77005,
United States
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20
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Durmaz YY, Sahkulubey EL, Yagci Y, Martinelli E, Galli G. A novel poly(p-phenylene) containing alternating poly(perfluorooctylethyl acrylate-co-methyl methacrylate) and polystyrene grafts by combination of atom transfer radical polymerization and Suzuki coupling processes. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26320] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Bain ED, Dawes K, Özçam AE, Hu X, Gorman CB, Šrogl J, Genzer J. Surface-Initiated Polymerization by Means of Novel, Stable, Non-Ester-Based Radical Initiator. Macromolecules 2012. [DOI: 10.1021/ma300491e] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Erich D. Bain
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Keith Dawes
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - A. Evren Özçam
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Xinfang Hu
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina
27695, United States
| | - Christopher B. Gorman
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina
27695, United States
| | - Jiří Šrogl
- Institute of Chemistry & Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Jan Genzer
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
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22
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Martinelli E, Sarvothaman MK, Alderighi M, Galli G, Mielczarski E, Mielczarski JA. PDMS network blends of amphiphilic acrylic copolymers with poly(ethylene glycol)-fluoroalkyl side chains for fouling-release coatings. I. Chemistry and stability of the film surface. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26050] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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23
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Surface self-segregation, wettability, and adsorption behavior of core–shell and pentablock fluorosilicone acrylate copolymers. J Colloid Interface Sci 2012; 369:435-41. [DOI: 10.1016/j.jcis.2011.12.028] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Revised: 11/10/2011] [Accepted: 12/10/2011] [Indexed: 11/23/2022]
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24
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Yamaguchi H, Kikuchi M, Kobayashi M, Ogawa H, Masunaga H, Sakata O, Takahara A. Influence of Molecular Weight Dispersity of Poly{2-(perfluorooctyl)ethyl acrylate} Brushes on Their Molecular Aggregation States and Wetting Behavior. Macromolecules 2012. [DOI: 10.1021/ma202300r] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Hiroki Yamaguchi
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395,
Japan
| | - Moriya Kikuchi
- Institute for Materials
Chemistry
and Engineering, Kyushu University, 744
Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO Takahara Soft Interface
Project, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Motoyasu Kobayashi
- Institute for Materials
Chemistry
and Engineering, Kyushu University, 744
Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO Takahara Soft Interface
Project, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hiroki Ogawa
- Japan Synchrotron Research Institute, Mikazuki, Sayo, Hyogo 671-5198,
Japan
| | - Hiroyasu Masunaga
- Japan Synchrotron Research Institute, Mikazuki, Sayo, Hyogo 671-5198,
Japan
| | - Osami Sakata
- Japan Synchrotron Research Institute, Mikazuki, Sayo, Hyogo 671-5198,
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
- Japan Science and Technology Agency (JST), ERATO Takahara Soft Interface
Project, 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
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25
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Hwang E, Lusker KL, Garno JC, Losovyj Y, Nesterov EE. Semiconducting polymer thin films by surface-confined stepwise click polymerization. Chem Commun (Camb) 2011; 47:11990-2. [PMID: 21959319 DOI: 10.1039/c1cc14479k] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surface-confined stepwise click polymerization was used to prepare surface-attached thin films of semiconducting polymers. These highly uniform films showed extended UV/vis absorption characteristics and a remarkable degree of molecular organization with a unidirectional alignment of the polymer chains normal to the surface.
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Affiliation(s)
- Euiyong Hwang
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803, USA
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26
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Li L, Wu J, Gao C. Gradient immobilization of a cell adhesion RGD peptide on thermal responsive surface for regulating cell adhesion and detachment. Colloids Surf B Biointerfaces 2011; 85:12-8. [DOI: 10.1016/j.colsurfb.2010.09.028] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Revised: 09/15/2010] [Accepted: 09/30/2010] [Indexed: 11/26/2022]
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27
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Estillore NC, Advincula RC. Free-Standing Films of Semifluorinated Block Copolymer Brushes from Layer-by-Layer Polyelectrolyte Macroinitiators. MACROMOL CHEM PHYS 2011. [DOI: 10.1002/macp.201100066] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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28
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Surface-grafted block copolymer brushes with continuous composition gradients of poly(poly(ethylene glycol)-monomethacrylate) and poly(N-isopropylacrylamide). Sci China Chem 2011. [DOI: 10.1007/s11426-010-4192-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Li H, Ma XT, Shi JL, Yao ZK, Zhu BK, Zhu LP. Preparation and properties of poly(ethylene oxide) gel filled polypropylene separators and their corresponding gel polymer electrolytes for Li-ion batteries. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.12.010] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Orski SV, Fries KH, Sontag SK, Locklin J. Fabrication of nanostructures using polymer brushes. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11039j] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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31
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Martinelli E, Fantoni C, Gallot B, Glisenti A, Galli G. Polystyrene-Polyperfluorooctylethyl acrylate Diblock Copolymers: The Effect of Dilution of the Fluorinated Mesogenic Chains on Bulk and Surface Properties. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.201051041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Estillore NC, Park JY, Advincula RC. Langmuir−Schaefer (LS) Macroinitiator Film Control on the Grafting of a Thermosensitive Polymer Brush via Surface Initiated-ATRP. Macromolecules 2010. [DOI: 10.1021/ma100726z] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicel C. Estillore
- Department of Chemistry and Department of Chemical Engineering, University of Houston, Houston, Texas 77204-5003
| | - Jin Young Park
- Department of Chemistry and Department of Chemical Engineering, University of Houston, Houston, Texas 77204-5003
| | - Rigoberto C. Advincula
- Department of Chemistry and Department of Chemical Engineering, University of Houston, Houston, Texas 77204-5003
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33
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Yu Q, Zhang Y, Chen H, Zhou F, Wu Z, Huang H, Brash JL. Protein adsorption and cell adhesion/detachment behavior on dual-responsive silicon surfaces modified with poly(N-isopropylacrylamide)-block-polystyrene copolymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:8582-8588. [PMID: 20170172 DOI: 10.1021/la904663m] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Diblock copolymer grafts covalently attached to surfaces have attracted considerable attention because of their special structure and novel properties. In this work, poly(N-isopropylacrylamide)-block-polystyrene (PNIPAAm-b-PS) brushes were prepared via surface-initiated consecutive atom-transfer radical polymerization on initiator-immobilized silicon. Because of the inherent thermosensitivity of PNIPAAm and the hydrophobicity difference between the two blocks, the modified surfaces were responsive to both temperature and solvent. Moreover, the diblock copolymer brushes exhibited both resistance to nonspecific protein adsorption and unique cell interaction properties. They showed strong protein resistance in both phosphate-buffered saline and blood plasma. In particular, fibrinogen adsorption from plasma at either room temperature or body temperature was less than 8 ng/cm(2), suggesting that the surfaces might possess good blood compatibility. In addition, the adhesion and detachment of L929 cells could be "tuned", and the ability to control the detachment of cells thermally was restored by block polymerization of hydrophobic, cell-adhesive PS onto a thicker PNIPAAm layer. In addition to providing a simple and effective design for advanced cell-culture surfaces, these results suggest new biomedical applications for PNIPAAm.
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Affiliation(s)
- Qian Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China
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34
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Mielczarski JA, Mielczarski E, Galli G, Morelli A, Martinelli E, Chiellini E. The surface-segregated nanostructure of fluorinated copolymer-poly(dimethylsiloxane) blend films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:2871-2876. [PMID: 19894752 DOI: 10.1021/la902912h] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Two fluorinated/siloxane copolymers, O5/19 and D5/3, carrying 6 and 8 CF(2) groups in the fluoroalkyl tail, respectively, were used as the surface-active components of cured poly(dimethylsiloxane) (PDMS) blends at different loadings (0.3-5.0 wt % with respect to PDMS). The surface chemical composition was determined by angle-resolved X-ray photoelectron spectroscopy at the takeoff angles theta of 0 degrees, 60 degrees, and 75 degrees. It was found that the fluorinated copolymer was surface-segregated, and in-depth segregation (approximately 5 nm) depended upon the chemical structure of the copolymer. The surface fluorine atomic percentage of the blends with D5/3 was up to 3 orders of magnitude higher than the theoretical value expected for ideal homogeneous samples. Moreover, small amounts of the copolymer in the blends were sufficient to saturate the outermost surface in fluorine content. The chemical composition of the surface-segregated nanostructure of the films was also proven to be affected by external environment, namely, exposure to water.
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Affiliation(s)
- Jerzy A Mielczarski
- LEM, Nancy-Université, CNRS, 15 avenue du Charmois, B.P. 40, F-54501 Vandoeuvre lès Nancy, France.
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35
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Hua J, Xu H, Geng J, Deng Z, Xu L, Yu YL. Atom transfer radical polymerizations of styrene and butadiene as well as their copolymerization initiated by benzyl chloride / 1-octanol-substituted MoCl5 / PPh3. JOURNAL OF POLYMER RESEARCH 2010. [DOI: 10.1007/s10965-010-9389-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Barbey R, Lavanant L, Paripovic D, Schüwer N, Sugnaux C, Tugulu S, Klok HA. Polymer brushes via surface-initiated controlled radical polymerization: synthesis, characterization, properties, and applications. Chem Rev 2010; 109:5437-527. [PMID: 19845393 DOI: 10.1021/cr900045a] [Citation(s) in RCA: 1218] [Impact Index Per Article: 87.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Raphaël Barbey
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des Matériaux, Laboratoire des Polymères, Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
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37
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Hussain H, Tan B, Mya KY, Liu Y, He CB, Davis TP. Synthesis, micelle formation, and bulk properties of poly(ethylene glycol)-b
-poly(pentafluorostyrene)-g
-polyhedral oligomeric silsesquioxane amphiphilic hybrid copolymers. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23773] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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Hua J, Geng J, Wang X, Zhao J, Xu L. Atom Transfer Radical Polymerization of Butadiene Initiated by Benzyl Chloride/MoCl 5Substituted by 1-octanol/PPh 3. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2009. [DOI: 10.1080/10601320903245458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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39
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Rastogi A, Paik MY, Ober CK. Development of a directly patterned low-surface-energy polymer brush in supercritical carbon dioxide. ACS APPLIED MATERIALS & INTERFACES 2009; 1:2013-2020. [PMID: 20355827 DOI: 10.1021/am9003733] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Carbon dioxide (CO2) is a sustainable solvent because it is nonflammable, exhibits a relatively low toxicity, and is naturally abundant. As a selective, nonpolar solvent, supercritical CO2 (scCO2) is an ideal fit for the development of low-surface-energy polymers. The development of directly patterned poly(2,2,2-trifluoroethyl methacrylate) (PTFEMA) brushes in scCO2 was investigated. PTFEMA, in particular, was selected over other fluorinated polymers because of its very high electron-beam (e-beam) sensitivity. PTFEMA brushes were grown on silicon substrates via controlled surface-initiated atom-transfer radical polymerization of TFEMA. Surface analysis techniques including ellipsometry, contact-angle goniometry, atomic force microscopy (AFM), and X-ray photoelectron spectroscopy were used to characterize the thickness, hydrophilicity, roughness, and chemical composition of the polymer brushes. PTFEMA brushes were directly patterned in a single step using e-beam lithography and were processed in an environmentally benign scCO2 solvent. Tapping-mode AFM imaging confirmed the successful e-beam patterning and development of these brushes. The sensitivity of PTFEMA brushes toward direct patterning with the e-beam, followed by scCO2 development, was studied and compared to development in tetrahydrofuran solvent. Using this direct-patterning method, followed by dry development in scCO2, highly resolved nanostructured polymer brush lines down to 78 nm could be prepared. This method can be generalized to prepare fluorinated low-surface-energy polymer brush surfaces in a single step for various applications.
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Affiliation(s)
- Abhinav Rastogi
- Departments of Chemistry and Chemical Biology and of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
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40
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Misra A, Urban MW. Acorn-shape polymeric nano-colloids: synthesis and self-assembled films. Macromol Rapid Commun 2009; 31:119-27. [PMID: 21590883 DOI: 10.1002/marc.200900233] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Revised: 06/03/2009] [Accepted: 06/03/2009] [Indexed: 11/11/2022]
Abstract
These studies show for the first time that the synthesis of two distinct phase-separated copolymers within one colloidal particle, i.e., poly(methyl methacrylate) (PMMA)/n-butylacrylate (nBA) and poly(nBA)/pentafluorostyrene (p-PFS) phases, results in unique acorn-shaped morphologies and are capable of coalescence. Spectroscopic and morphological analysis combined with contact angle measurements as well as thermodynamic modeling reveal that in an effort to create stable heterogeneous two-phase particle morphologies it is essential to provide desirable interfacial energetic conditions during polymerization and to utilise monomers that have a similar glass transition temperature (T(g) ). Such colloidal particles are stable and are able to self-assemble during coalescence, depending upon the surface energy of a substrate. When a particle monolayer coalesces on a high surface tension substrate, the p-PFS phase expresses itself near the film-air interface, whereas for low surface energy substrates, the p-PFS phase dominates the film-substrate interfacial regions.
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Affiliation(s)
- Anuradha Misra
- School of Polymers and High Performance Materials, Shelby F. Thames Polymer Science Research Center, The University of Southern Mississippi, Hattiesburg, MS 39406, USA
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41
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42
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Peng H, Blakey I, Dargaville B, Rasoul F, Rose S, Whittaker AK. Synthesis and evaluation of partly fluorinated block copolymers as MRI imaging agents. Biomacromolecules 2009; 10:374-81. [PMID: 19128056 DOI: 10.1021/bm801136m] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A series of well-defined diblock copolymers of acrylic acid with partially fluorinated acrylate and methacrylate monomers were synthesized using ATRP as potential 19F MRI imaging agents. The diblock copolymers could undergo spontaneous self-assembly in mixed and aqueous solvents to form stable micelles with a diameter from approximately 20-45 nm, having a fluorine-rich core that provides a strong signal for MRI examinations. The observed MRI image intensities were related to the NMR longitudinal and transverse relaxation times, and were found to depend on polymer structure and method of micellization. Two distinct T2 relaxation times were measured; on comparison of expected MRI image intensities with those observed experimentally, it was found that methacrylate polymers show systematically lower signal intensity than acrylate polymers. This is related to the presence of a population of nuclear spins having very short T2 relaxation times that cannot be detected under high-resolution NMR and MRI conditions.
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Affiliation(s)
- Hui Peng
- Centre for Magnetic Resonance, The University of Queensland, St. Lucia 4072, Australia
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43
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44
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Minet I, Delhalle J, Hevesi L, Mekhalif Z. Surface-initiated ATRP of PMMA, PS and diblock PS-b-PMMA copolymers from stainless steel modified by 11-(2-bromoisobutyrate)-undecyl-1-phosphonic acid. J Colloid Interface Sci 2009; 332:317-26. [PMID: 19168187 DOI: 10.1016/j.jcis.2008.12.066] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 12/11/2008] [Accepted: 12/24/2008] [Indexed: 11/17/2022]
Affiliation(s)
- Isabelle Minet
- CES Laboratory, Department of Chemistry, Facultés Universitaires Notre-Dame de la Paix, Rue de Bruxelles, 61, B-5000 Namur, Belgium
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45
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Li L, Zhu Y, Li B, Gao C. Fabrication of thermoresponsive polymer gradients for study of cell adhesion and detachment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:13632-9. [PMID: 18980353 DOI: 10.1021/la802556e] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A poly(N-isopropylacrylamide) (PNIPAAm) gradient covalently anchored on a silicon substrate with a linear variation of thickness was fabricated by continuous injection of the reaction mixture (NIPAAm, CuBr and its ligand, methanol, and water) into a glass chamber containing a silicon wafer, whose surface had been homogeneously immobilized with bromoisobutyryl bromide (BIBB). Because of the good control of the surface-initiated atom transfer radical polymerization (SI-ATRP) technique, the thickness of the PNIPAAm brushes was linearly proportional to the polymerization time. As a result, the gradient length and sharpness could be easily controlled by the experimental parameters such as the polymerization time and the injection rate. The as-prepared PNIPAAm gradients were characterized by ellipsometry, water contact angle, and atom force microscopy to detect their alteration of the thickness, surface wettability, and morphology, confirming the gradient structure. X-ray photoelectron spectroscopy confirmed the surface composition of the PNIPAAm. In vitro culture of HepG2 cells was implemented on the gradient surfaces, revealing that the cells could adhere at 37 degrees C and could be detached at 24 degrees C when the gradient thickness was in the range of 20-45 nm. The work thus develops a method to fabricate the stable gradient surface with better quality control, and clarifies in a facile manner the appropriate thickness of the PNIPAAm brushes in terms of cell adhesion and detachment.
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Affiliation(s)
- Linhui Li
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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46
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Martinelli E, Menghetti S, Galli G, Glisenti A, Krishnan S, Paik MY, Ober CK, Smilgies DM, Fischer DA. Surface engineering of styrene/PEGylated-fluoroalkyl styrene block copolymer thin films. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.23151] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Arslan H, Yeşilyurt N, Hazer B. Brush Type Copolymers of Poly(3-hydroxybutyrate) and Poly(3-hydroxyoctanoate) with Same Vinyl Monomers via “Grafting From” Technique by Using Atom Transfer Radical Polymerization Method. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/masy.200850905] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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48
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Yamaguchi H, Honda K, Kobayashi M, Morita M, Masunaga H, Sakata O, Sasaki S, Takahara A. Molecular Aggregation State of Surface-grafted Poly{2-(perfluorooctyl)ethyl acrylate} Thin Film Analyzed by Grazing Incidence X-ray Diffraction. Polym J 2008. [DOI: 10.1295/polymj.pj2008107] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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49
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Zhang R, Seki A, Ishizone T, Yokoyama H. Reduced hydrophobic interaction of polystyrene surfaces by spontaneous segregation of block copolymers with oligo (ethylene glycol) methyl ether methacrylate blocks: force measurements in water using atomic force microscope with hydrophobic probes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:5527-5533. [PMID: 18412376 DOI: 10.1021/la703934u] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Reduction of hydrophobic interaction in water is important in biological interfaces. In our previous work, we have found that poly(styrene- b-triethylene glycol methyl ether methacrylate) (PS-PME3MA) segregates the PME3MA block to the surface in hydrophobic environment, such as in air or in a vacuum, and shows remarkable resistance against adsorption or adhesion of proteins, platelets, and cells in water. In this paper, we report that atomic force microscopy (AFM) with hydrophobic probes can directly monitor the reduced hydrophobic interaction of the PS surfaces modified by poly(styrene- b-origoethylene glycol methyl ether methacrylate) (PS-PME NMA), where N is the number of ethylene glycol units. The pull-off forces between the hydrophobic probes that are coated with octyltrichlorosilane (OLTS) and the PS-PME NMA modified polystyrene (PS) surfaces in water were measured. The absolute spring constants and tip-curvatures of the AFM cantilevers were measured to compute the work of adhesion by the Johnson, Kendall, and Roberts (JKR) theory, which relates the pull-off force at which the separation occurs between a hemisphere and a plane to the work of adhesion. The hydrophobic interactions between the hydrophobic tip and polymer surfaces in water were greatly reduced with the segregated PME NMA blocks. The hydrophobic interactions decrease with increasing N of the series of PS-PME NMA and show a correlation with the amount of protein adsorbed.
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Affiliation(s)
- Rui Zhang
- Nanotechnology Research Institute, National Institute of Advanced Insdustrial Science and Technology, Ibaraki, Japan
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50
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Ostaci R, Celle C, Seytre G, Beyou E, Chapel J, Drockenmuller E. Influence of nitroxide structure on polystyrene brushes “grafted‐from” silicon wafers. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22678] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Roxana‐Viorela Ostaci
- Université Claude Bernard Lyon 1, Laboratoire des Matériaux Polymères et Biomatériaux (LMPB/IMP, UMR CNRS 5223), 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
| | - Caroline Celle
- Université Claude Bernard Lyon 1, Laboratoire des Matériaux Polymères et Biomatériaux (LMPB/IMP, UMR CNRS 5223), 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
| | - Gérard Seytre
- Université Claude Bernard Lyon 1, Laboratoire des Matériaux Polymères et Biomatériaux (LMPB/IMP, UMR CNRS 5223), 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
| | - Emmanuel Beyou
- Université Claude Bernard Lyon 1, Laboratoire des Matériaux Polymères et Biomatériaux (LMPB/IMP, UMR CNRS 5223), 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
| | - Jean‐Paul Chapel
- Complex Fluid Laboratory (CFL) ‐ UMR CNRS/Rhodia 166, 350 George Patterson Boulevard, Bristol, Pennsylvania 19007
| | - Eric Drockenmuller
- Université Claude Bernard Lyon 1, Laboratoire des Matériaux Polymères et Biomatériaux (LMPB/IMP, UMR CNRS 5223), 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
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