1
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Mor S, Yadav R, Bhakuni K, Rawat P, Bisht M, Deenadayalu N, Venkatesu P. Unraveling the Role of Deep Eutectic Solvents with Varying Hydrogen-Bond Acceptors on the Thermoresponsive Polymer Poly( N-isopropylacrylamide). J Phys Chem B 2024. [PMID: 38683962 DOI: 10.1021/acs.jpcb.4c00888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Deep eutectic solvents (DESs) have emerged as promising tools for crafting polymeric materials across diverse domains. This study delves into the impact of a series of DESs on the phase behavior of poly(N-isopropylacrylamide) (PNIPAM) in aqueous environments, presenting compelling insights into their performance. Specifically, we explore the conformational phase behavior of PNIPAM in the presence of four distinct lactic acid (LA)-based DESs: LA-betaine (LA-BET), LA-proline (LA-PRO), LA-choline chloride (LA-CC), and LA-urea (LA-U). By maintaining a consistent hydrogen-bond donor (HBD) while varying the hydrogen-bond acceptor (HBA), we unravel how different DES compositions modulate the phase transition behavior of PNIPAM. Our findings underscore the profound influence of DESs comprising LA as the HBD and diverse HBAs-BET, PRO, CC, and U on the thermoresponsive behavior of PNIPAM. Employing spectroscopic techniques such as ultraviolet-visible (UV-vis) spectroscopy, steady-state fluorescence, Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), ζ-potential, and transmission electron microscopy (TEM), we elucidate the preferential interactions between the HBA groups within DESs and the hydration layer of PNIPAM. Notably, temperature-dependent DLS analyses reveal a discernible decrease in the lower critical solution temperature (LCST) of PNIPAM with increasing DES concentration, ultimately disrupting the hydrogen-bond interactions and resulting in early hydrophobic collapse of the polymer, which can be clearly seen in the TEM micrographs. Furthermore, the formation of polymer composites within the mixed system leads to notable alterations in the physiochemical properties of PNIPAM, as evidenced by shifts in its LCST value in the presence of DESs. This perturbation disrupts hydrogen-bond interactions, inducing hydrophobic collapse of the polymers, a phenomenon vividly captured in TEM micrographs. In essence, our study sheds new light on the pivotal role of varying HBA groups within DESs in modulating the conformational transitions of PNIPAM. These insights not only enrich our fundamental understanding but also hold immense promise for the development of smart polymeric systems with multifaceted applications spanning bioimaging, biomedical science, polymer science, and beyond.
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Affiliation(s)
- Sanjay Mor
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Ritu Yadav
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Kavya Bhakuni
- Department of Chemistry, St. Stephen's College, University of Delhi, Delhi 110007, India
| | - Pradeep Rawat
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Meena Bisht
- Department of Chemistry, Sri Venkateswara College, University of Delhi, Delhi 110007, India
| | - Nirmala Deenadayalu
- Department of Chemistry, Durban University of Technology, Durban4000, South Africa
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2
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Papadakis CM, Niebuur BJ, Schulte A. Thermoresponsive Polymers under Pressure with a Focus on Poly( N-isopropylacrylamide) (PNIPAM). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1-20. [PMID: 38149782 DOI: 10.1021/acs.langmuir.3c02398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Pressure is a key variable in the phase behavior of responsive polymers, both for applications and from a fundamental point of view. In this feature article, we review recent developments, particularly applications of neutron techniques such as small-angle neutron scattering (SANS) and quasi-elastic neutron scattering (QENS), across the temperature-pressure phase diagram. These are complemented by kinetic SANS experiments following pressure jumps. In the prototype system poly(N-isopropylacrylamide) (PNIPAM), QENS revealed the pressure-dependent characteristics of hydration water around the lower critical solution temperature transition. The size, water content, and inner structure of the mesoglobules formed in the two-phase region depend strongly on pressure, as shown by SANS. Beside these changes at the phase transition, the mesoglobule formation at low pressure is determined by kinetic factors, namely the formation of a polymer-rich, rigid shell, which hampers further growth by coalescence. At high pressure, in contrast, the growth proceeds by diffusion-limited coalescence without any kinetic hindrance. The disintegration of the mesoglobules evolves either via chain release from their surface or via swelling, depending on the osmotic pressure of the water. Moreover, we report on the profound influence of pressure on the cononsolvency effect. In the temperature-pressure frame, the one-phase region is hugely expanded upon the addition of the cosolvent methanol. SANS experiments unveil the enthalpic and entropic contributions to the effective Flory-Huggins interaction parameter between the segments and the solvent mixture. QENS experiments demonstrate an increase in polymer associated water with pressure, whereas methanol is released. Correspondingly, the solvent phase becomes enriched in methanol, providing a mechanism for the breakdown of cononsolvency at a high pressure. Finally, we outline future opportunities for high-pressure studies of thermoresponsive polymers, with a focus on neutron methods.
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Affiliation(s)
- Christine M Papadakis
- TUM School of Natural Sciences, Physics Department, Soft Matter Physics Group, Technical University of Munich, James-Franck-Str. 1, 85748 Garching, Germany
| | - Bart-Jan Niebuur
- TUM School of Natural Sciences, Physics Department, Soft Matter Physics Group, Technical University of Munich, James-Franck-Str. 1, 85748 Garching, Germany
| | - Alfons Schulte
- Department of Physics and College of Optics and Photonics, University of Central Florida, 4111 Libra Drive, Orlando, Florida 32816-2385, United States
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3
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Henschel C, Schanzenbach D, Laschewsky A, Ko CH, Papadakis CM, Müller-Buschbaum P. Thermoresponsive and co-nonsolvency behavior of poly(N-vinyl isobutyramide) and poly(N-isopropyl methacrylamide) as poly(N-isopropyl acrylamide) analogs in aqueous media. Colloid Polym Sci 2023. [DOI: 10.1007/s00396-023-05083-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Abstract
Sets of the nonionic polymers poly(N-vinyl isobutyramide) (pNVIBAm) and poly(N-isopropyl methacrylamide) (pNIPMAm) are synthesized by radical polymerization covering the molar mass range from about 20,000 to 150,000 kg mol−1, and their thermoresponsive and solvent-responsive behaviors in aqueous solution are studied. Both polymers feature a lower critical solution temperature (LCST) apparently of the rare so-called type II, as characteristic for their well-studied analogue poly(N-isopropyl acrylamide) (pNIPAm). Moreover, in analogy to pNIPAm, both polymers exhibit co-nonsolvency behavior in mixtures of water with several co-solvents, including short-chain alcohols as well as a range of polar aprotic solvents. While the cloud points of the aqueous solutions are a few degrees higher than those for pNIPAm and increase in the order pNIPAm < pNVIBAm < pNIPMAm, the co-nonsolvency behavior becomes less pronounced in the order pNIPAm > pNVIBAm > pNIPMAm. Exceptionally, pNIPMAm does not show co-nonsolvency in mixtures of water and N,N-dimethylformamide.
Graphical Abstract
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4
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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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5
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Tavagnacco L, Zaccarelli E, Chiessi E. Modeling Solution Behavior of Poly( N-isopropylacrylamide): A Comparison between Water Models. J Phys Chem B 2022; 126:3778-3788. [PMID: 35491838 PMCID: PMC9150113 DOI: 10.1021/acs.jpcb.2c00637] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
![]()
Water is known to
play a fundamental role in determining the structure
and functionality of macromolecules. The same crucial contribution
is also found in the in silico description of polymer aqueous solutions.
In this work, we exploit the widely investigated synthetic polymer
poly(N-isopropylacrylamide) (PNIPAM) to understand
the effect of the adopted water model on its solution behavior and
to refine the computational setup. By means of atomistic molecular
dynamics simulations, we perform a comparative study of PNIPAM aqueous
solution using two advanced water models: TIP4P/2005 and TIP4P/Ice.
The conformation and hydration features of an atactic 30-mer at infinite
dilution are probed at a range of temperature and pressure suitable
to detect the coil-to-globule transition and to map the P–T
phase diagram. Although both water models can reproduce the temperature-induced
coil-to-globule transition at atmospheric pressure and the polymer
hydration enhancement that occurs with increasing pressure, the PNIPAM–TIP4P/Ice
solution shows better agreement with experimental findings. This result
can be attributed to a stronger interaction of TIP4P/Ice water with
both hydrophilic and hydrophobic groups of PNIPAM, as well as to a
less favorable contribution of the solvent entropy to the coil-to-globule
transition.
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Affiliation(s)
- Letizia Tavagnacco
- CNR-ISC and Department of Physics, Sapienza University of Rome, Piazzale A, Moro 2, Rome 00185, Italy
| | - Emanuela Zaccarelli
- CNR-ISC and Department of Physics, Sapienza University of Rome, Piazzale A, Moro 2, Rome 00185, Italy
| | - Ester Chiessi
- Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica I, Rome 00133, Italy
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6
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Tavagnacco L, Chiessi E, Zaccarelli E. Molecular insights on poly( N-isopropylacrylamide) coil-to-globule transition induced by pressure. Phys Chem Chem Phys 2021; 23:5984-5991. [PMID: 33666621 PMCID: PMC8247264 DOI: 10.1039/d0cp06452a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 02/17/2021] [Indexed: 12/17/2022]
Abstract
By using extensive all-atom molecular dynamics simulations of an atactic linear polymer chain, we provide microscopic insights into poly(N-isopropylacrylamide) (PNIPAM) coil-to-globule transition addressing the roles played by both temperature and pressure. We detect a coil-to-globule transition up to large pressures, showing a reentrant behavior of the critical temperature with increasing pressure in agreement with experimental observations. Furthermore, again confirming the experimental findings, we report the existence at high pressures of a new kind of globular state. It is characterized by a more structured hydration shell that is closer to PNIPAM hydrophobic domains, as compared to the globular state observed at atmospheric pressure. Our results highlight that temperature and pressure induce a PNIPAM coil-to-globule transition through different molecular mechanisms, opening the way for a systematic use of both thermodynamic variables to tune the location of the transition and the properties of the associated swollen/collapsed states.
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Affiliation(s)
- Letizia Tavagnacco
- CNR-ISC and Department of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185, Rome, Italy.
| | - Ester Chiessi
- Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133, Rome, Italy.
| | - Emanuela Zaccarelli
- CNR-ISC and Department of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185, Rome, Italy.
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7
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Niebuur BJ, Ko CH, Zhang X, Claude KL, Chiappisi L, Schulte A, Papadakis CM. Pressure Dependence of the Cononsolvency Effect in Aqueous Poly(N-isopropylacrylamide) Solutions: A SANS Study. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00489] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bart-Jan Niebuur
- Physik-Department, Fachgebiet Physik weicher Materie, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Chia-Hsin Ko
- Physik-Department, Fachgebiet Physik weicher Materie, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Xiaohan Zhang
- Physik-Department, Fachgebiet Physik weicher Materie, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Kora-Lee Claude
- Physik-Department, Fachgebiet Physik weicher Materie, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Leonardo Chiappisi
- Large Scale Structures Group, Institut Laue-Langevin, 71, Avenue des Martyrs, CS 20 156, 38042 Grenoble, France
- Stranski Laboratorium für Physikalische Chemie und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC7, D-10623 Berlin, Germany
| | - Alfons Schulte
- Department of Physics and College of Optics and Photonics, University of Central Florida, 4111 Libra Drive, Orlando, Florida 32816, United States
| | - Christine M. Papadakis
- Physik-Department, Fachgebiet Physik weicher Materie, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
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8
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Yue M, Imai K, Yamashita C, Miura Y, Hoshino Y. Effects of Hydrophobic Modifications and Phase Transitions of Polyvinylamine Hydrogel Films on Reversible CO
2
Capture Behavior: Comparison between Copolymer Films and Blend Films for Temperature‐Responsive CO
2
Absorption. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201600570] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mengchen Yue
- Department of Chemical Engineering Graduate School of Engineering Kyushu University Motooka Nishi‐ku Fukuoka 819‐0395 Japan
| | - Kenta Imai
- Department of Chemical Engineering Graduate School of Engineering Kyushu University Motooka Nishi‐ku Fukuoka 819‐0395 Japan
| | - Chie Yamashita
- Department of Chemical Engineering Graduate School of Engineering Kyushu University Motooka Nishi‐ku Fukuoka 819‐0395 Japan
| | - Yoshiko Miura
- Department of Chemical Engineering Graduate School of Engineering Kyushu University Motooka Nishi‐ku Fukuoka 819‐0395 Japan
| | - Yu Hoshino
- Department of Chemical Engineering Graduate School of Engineering Kyushu University Motooka Nishi‐ku Fukuoka 819‐0395 Japan
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9
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Ashbaugh HS, Weiss K, Williams SM, Meng B, Surampudi LN. Temperature and Pressure Dependence of Methane Correlations and Osmotic Second Virial Coefficients in Water. J Phys Chem B 2015; 119:6280-94. [DOI: 10.1021/acs.jpcb.5b02056] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Henry S. Ashbaugh
- Department
of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
| | - Katie Weiss
- Alfred University, Alfred, New York 14802, United States
| | - Steven M. Williams
- Department
of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
| | - Bin Meng
- Department
of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
| | - Lalitanand N. Surampudi
- Department
of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
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10
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Grinberg VY, Senin AA, Grinberg NV, Burova TV, Dubovik AS, Potekhin SA, Erukhimovich IY. High pressure effects under phase separation of aqueous solutions of poly(N-isopropylacryamide): A HS-DSC study. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Ebeling B, Eggers S, Hendrich M, Nitschke A, Vana P. Flipping the Pressure- and Temperature-Dependent Cloud-Point Behavior in the Cononsolvency System of Poly(N-isopropylacrylamide) in Water and Ethanol. Macromolecules 2014. [DOI: 10.1021/ma5001139] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bastian Ebeling
- Institut
für Physikalische
Chemie, Georg-August-Universität, Tammannstr. 6, D-37077 Göttingen, Germany
| | - Steffen Eggers
- Institut
für Physikalische
Chemie, Georg-August-Universität, Tammannstr. 6, D-37077 Göttingen, Germany
| | - Michael Hendrich
- Institut
für Physikalische
Chemie, Georg-August-Universität, Tammannstr. 6, D-37077 Göttingen, Germany
| | - Annika Nitschke
- Institut
für Physikalische
Chemie, Georg-August-Universität, Tammannstr. 6, D-37077 Göttingen, Germany
| | - Philipp Vana
- Institut
für Physikalische
Chemie, Georg-August-Universität, Tammannstr. 6, D-37077 Göttingen, Germany
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12
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OSAKA N. Phase Behavior and Physical Properties of Polymers Under Pressure. KOBUNSHI RONBUNSHU 2014. [DOI: 10.1295/koron.71.430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Meng B, Ashbaugh HS. Pressure reentrant assembly: direct simulation of volumes of micellization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:14743-14747. [PMID: 23930981 DOI: 10.1021/la402798f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Surfactants exhibit maxima in their critical micelle concentrations upon application of hydrostatic pressure, which is attributable to changes in their volumes of micellization from positive to negative values with increasing pressure. We present a direct molecular simulation analysis of the volumes of micellization of an anionic, cationic, and nonionic surfactant in aqueous solution at pressures up to 2500 bar. Excellent agreement with experiment is observed. A Kirkwood-Buff theory analysis based on proximal solvent distributions permits the breakdown of the volumes of micellization into constituent surfactant headgroup and tailgroup contributions. Although the micellization volume crossover is analogous to the transfer of an alkane from water to its pure liquid, significant differences are observed, including lower compressibilities of micelle volumes compared to that of the alkane liquid, negative partial compressibilites for anionic sulfated surfactant monomers, and large nonionic ethoxy headgroup contributions to the micellization volume.
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Affiliation(s)
- Bin Meng
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States
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14
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Reinhardt M, Dzubiella J, Trapp M, Gutfreund P, Kreuzer M, Gröschel AH, Müller AHE, Ballauff M, Steitz R. Fine-Tuning the Structure of Stimuli-Responsive Polymer Films by Hydrostatic Pressure and Temperature. Macromolecules 2013. [DOI: 10.1021/ma400962p] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Matthias Reinhardt
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, 14109
Berlin, Germany
| | - Joachim Dzubiella
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, 14109
Berlin, Germany
- Department
of Physics, Humboldt-University Berlin,
Newtonstrasse 15, 12489
Berlin, Germany
| | - Marcus Trapp
- Angewandte
Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld
253, D-69120 Heidelberg, Germany
| | | | - Martin Kreuzer
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, 14109
Berlin, Germany
| | - André H. Gröschel
- Makromolekulare
Chemie II, Universität Bayreuth,
Universitätsstrasse
30, 95440 Bayreuth, Germany
| | - Axel H. E. Müller
- Makromolekulare
Chemie II, Universität Bayreuth,
Universitätsstrasse
30, 95440 Bayreuth, Germany
| | - Matthias Ballauff
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, 14109
Berlin, Germany
- Department
of Physics, Humboldt-University Berlin,
Newtonstrasse 15, 12489
Berlin, Germany
| | - Roland Steitz
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, 14109
Berlin, Germany
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15
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Uğuzdoğan E, Kabasakal OS. Synthesis and characterization of thermally-sensitive polymer: Poly(aminomethoxypropylacrylamide). Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.07.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Aseyev V, Tenhu H, Winnik FM. Non-ionic Thermoresponsive Polymers in Water. ADVANCES IN POLYMER SCIENCE 2010. [DOI: 10.1007/12_2010_57] [Citation(s) in RCA: 374] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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17
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Crisman RL, Randolph TW. Refolding of proteins from inclusion bodies is favored by a diminished hydrophobic effect at elevated pressures. Biotechnol Bioeng 2009; 102:483-92. [DOI: 10.1002/bit.22082] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Osaka N, Takata SI, Suzuki T, Endo H, Shibayama M. Comparison of heat- and pressure-induced gelation of β-lactoglobulin aqueous solutions studied by small-angle neutron and dynamic light scattering. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.04.055] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Mutsuo S, Yamamoto K, Furuzono T, Kimura T, Ono T, Kishida A. Pressure-induced molecular assembly of hydrogen-bonded polymers. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/polb.21407] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Crespy D, Rossi RM. Temperature-responsive polymers with LCST in the physiological range and their applications in textiles. POLYM INT 2007. [DOI: 10.1002/pi.2277] [Citation(s) in RCA: 143] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Wu Y, Meersman F, Heremans K, Ozaki Y. Hybrid two-dimensional correlation infrared study on the temperature- and pressure-induced concentration dynamics and structural variations of poly(N-isopropylacrylamide). J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2006.03.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Loozen E, Nies E, Heremans K, Berghmans H. The Influence of Pressure on the Lower Critical Solution Temperature Miscibility Behavior of Aqueous Solutions of Poly(vinyl methyl ether) and the Relation to the Compositional Curvature of the Volume of Mixing. J Phys Chem B 2006; 110:7793-802. [PMID: 16610875 DOI: 10.1021/jp0574854] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In mixtures of PVME and water, the influence of pressure on the LCST miscibility gap is determined covering the whole composition range and pressures from atmospheric pressure up to 900 MPa. The cloud point curve at atmospheric pressure has the characteristic bimodal shape in agreement with literature data. Upon increasing pressure the cloud point curve at the low concentration side decreases with pressure, whereas at the high concentrations the cloud point curve increases with pressure. The overall influence of pressure results in a less pronounced bimodality and ultimately the bimodal shape disappears. In addition to the pressure dependence of the miscibility behavior, the density of mixtures of water and PVME are determined at atmospheric pressure. The experimental excess specific volumes are negative for all measured compositions, but the compositional curvature varies with composition. The curvature of the excess specific volume is positive for the higher concentrations but it is negative in the lower composition range. The density measurements are linked to the pressure dependence of the LCST miscibility behavior using exact thermodynamic relationships. The excess specific volume and miscibility results are shown to be in good agreement. Moreover, it is shown that the Clapeyron equation, which is exact for pure components and also frequently assumed to apply to mixtures, is not valid in the system PVME/water. The system PVME/water is an example where the usual approximation of one-to-one correspondence between curvature and excess volume does not apply. Finally, the molecular origins for the observed excess volume and miscibility behavior are briefly discussed from theoretical and molecular simulation points of view.
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Affiliation(s)
- Els Loozen
- Polymer Research Division, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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23
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Meersman F, Smeller L, Heremans K. Protein stability and dynamics in the pressure–temperature plane. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2006; 1764:346-54. [PMID: 16414316 DOI: 10.1016/j.bbapap.2005.11.019] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2005] [Revised: 11/23/2005] [Accepted: 11/28/2005] [Indexed: 10/25/2022]
Abstract
The pressure-temperature stability diagram of proteins and the underlying assumptions of the elliptical shape of the diagram are discussed. Possible extensions, such as aggregation and fibril formation, are considered. An important experimental observation is the extreme pressure stability of the mature fibrils. Molecular origins of the diagram in terms of models of the partial molar volume of a protein focus on cavities and hydration. Changes in thermal expansivity, compressibility and heat capacity in terms of fluctuations of the enthalpy and volume change of the unfolding should also focus on these parameters. It is argued that the study of water-soluble polymers might further our understanding of the stability diagram. Whereas the role of water in protein behaviour is unquestioned, the role of cavities is less clear.
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Affiliation(s)
- Filip Meersman
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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Kirpach A, Adolf D. High Pressure Induced Coil-Globule Transitions of Smart Polymers. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/masy.200650502] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Kaneko T, Asoh TA, Fukushige Y, Akashi M. Water-Driven Thermoresponsive Peptohelical Cushion. Macromolecules 2006. [DOI: 10.1021/ma052307u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tatsuo Kaneko
- Department of Nanostructured and Advanced Materials, Department of Science and Engineering, Kagoshima University, 1-21-40, Korimoto, Kagoshima, 890-0065, Japan, and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
| | - Taka-aki Asoh
- Department of Nanostructured and Advanced Materials, Department of Science and Engineering, Kagoshima University, 1-21-40, Korimoto, Kagoshima, 890-0065, Japan, and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
| | - Yoshitsugi Fukushige
- Department of Nanostructured and Advanced Materials, Department of Science and Engineering, Kagoshima University, 1-21-40, Korimoto, Kagoshima, 890-0065, Japan, and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
| | - Mitsuru Akashi
- Department of Nanostructured and Advanced Materials, Department of Science and Engineering, Kagoshima University, 1-21-40, Korimoto, Kagoshima, 890-0065, Japan, and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
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26
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Wu Y, Meersman F, Ozaki Y. A Novel Application of Hybrid Two-Dimensional Correlation Infrared Spectroscopy: Exploration of the Reversibility of the Pressure- and Temperature-Induced Phase Separation of Poly(N-isopropylacrylamide) and Poly(N-isopropylmethacrylamide) in Aqueous Solution. Macromolecules 2006. [DOI: 10.1021/ma0521755] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuqing Wu
- Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, No. 2699 Qianjin Street, Changchun 130012, P. R. China; Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium; and Department of Chemistry and Research Center for Environment Friendly Polymers, School of Science and Technology, Kwansei-Gakuin University, Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Filip Meersman
- Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, No. 2699 Qianjin Street, Changchun 130012, P. R. China; Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium; and Department of Chemistry and Research Center for Environment Friendly Polymers, School of Science and Technology, Kwansei-Gakuin University, Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Yukihiro Ozaki
- Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, No. 2699 Qianjin Street, Changchun 130012, P. R. China; Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium; and Department of Chemistry and Research Center for Environment Friendly Polymers, School of Science and Technology, Kwansei-Gakuin University, Gakuen, Sanda, Hyogo 669-1337, Japan
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27
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Meersman F, Wang J, Wu Y, Heremans K. Pressure Effect on the Hydration Properties of Poly(N-isopropylacrylamide) in Aqueous Solution Studied by FTIR Spectroscopy. Macromolecules 2005. [DOI: 10.1021/ma051582d] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Filip Meersman
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom; Laboratory of Medicinal Research, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroederstraat 10, B-3000 Leuven, Belgium; Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, No. 10 of Qianwei Road, Changchun 130023, P. R. China; and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven,
| | - Jing Wang
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom; Laboratory of Medicinal Research, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroederstraat 10, B-3000 Leuven, Belgium; Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, No. 10 of Qianwei Road, Changchun 130023, P. R. China; and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven,
| | - Yuqing Wu
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom; Laboratory of Medicinal Research, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroederstraat 10, B-3000 Leuven, Belgium; Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, No. 10 of Qianwei Road, Changchun 130023, P. R. China; and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven,
| | - Karel Heremans
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom; Laboratory of Medicinal Research, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroederstraat 10, B-3000 Leuven, Belgium; Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, No. 10 of Qianwei Road, Changchun 130023, P. R. China; and Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven,
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Kunugi S, Kameyama K, Tada T, Tanaka N, Shibayama M, Akashi M. Differences in pressure and temperature transitions of proteins and polymer gels. Braz J Med Biol Res 2005; 38:1233-8. [PMID: 16082464 DOI: 10.1590/s0100-879x2005000800011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pressure-driven and temperature-driven transitions of two thermoresponsive polymers, poly(N-isopropylacrylamide) (pNIPAM) and poly(N-vinylisobutyramide) (pNVIBA)), in both a soluble linear polymer form and a cross-linked hydro-gel form, were examined by a dynamic light-scattering method and direct microscopic observation, respectively. Their behavior was compared with that of protein systems. Changes in some characteristic parameters in the time-intensity correlation functions of dynamic light-scattering measurement of aqueous solutions of pNIPAM at various pressures and temperatures showed no essential differences during temperature and pressure scanning and, as a whole, the motions of polymers in aqueous solutions were similar in two types of transitions until chain shrinkage occurred. The gels (cross-linked polymer gels) prepared from the thermoresponsive polymers also showed similar volume transitions responding to the pressure and temperature increase. In temperature transitions, however, gels showed drastic volume shrinkage with loss of transparency, while pressure-induced transition showed a slow recovery of transparency while keeping the size, after first transient drastic volume shrinkage with loss of transparency. At a temperature slightly higher than the transition under atmospheric temperature, so-called reentry of the volume change and recovery of the transparency were observed during the pressure-increasing process, which implies much smaller aggregation or non-aggregated collapsed polymer chains in the gel at higher pressures, indicating a certain mechanistic difference of the dehydration processes induced by temperature and pressure.
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Affiliation(s)
- S Kunugi
- Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto, Japan.
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30
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Kogure H, Nanami S, Masuda Y, Toyama Y, Kubota K. Hydration and dehydration behavior of N-isopropylacrylamide gel particles. Colloid Polym Sci 2005. [DOI: 10.1007/s00396-005-1303-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Temperature- and pressure-responsive properties of l- and dl-forms of poly(N-(1-hydroxymethyl)propylmethacrylamide) in aqueous solutions. Colloid Polym Sci 2005. [DOI: 10.1007/s00396-005-1270-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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32
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Meersman F, Smeller L, Heremans K. Extending the Pressure-Temperature State Diagram of Myoglobin. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590037] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Kato E. Thermodynamic study of a pressure-temperature phase diagram for poly(N-isopropylacrylamide) gels. J Appl Polym Sci 2005. [DOI: 10.1002/app.21764] [Citation(s) in RCA: 21] [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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34
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Nasimova I, Karino T, Okabe S, Nagao M, Shibayama M. Small-Angle Neutron Scattering Investigation of Pressure Influence on the Structure of Weakly Charged Poly(N-isopropylacrylamide) Solutions and Gels. Macromolecules 2004. [DOI: 10.1021/ma049058e] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Irina Nasimova
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
| | - Takeshi Karino
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
| | - Satoshi Okabe
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
| | - Michihiro Nagao
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
| | - Mitsuhiro Shibayama
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
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35
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Shibayama M, Isono K, Okabe S, Karino T, Nagao M. SANS Study on Pressure-Induced Phase Separation of Poly(N-isopropylacrylamide) Aqueous Solutions and Gels. Macromolecules 2004. [DOI: 10.1021/ma0359685] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mitsuhiro Shibayama
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 106-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Kohji Isono
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 106-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Satoshi Okabe
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 106-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Takeshi Karino
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 106-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Michihiro Nagao
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 106-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
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36
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Iwamura T, Morioka Y, Nakagawa T, Endo T. Selective radical cyclopolymerization of a bifunctional vinyl monomer derived fromN-vinylacetamide. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pola.20532] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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37
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Yamaoka T, Tamura T, Seto Y, Tada T, Kunugi S, Tirrell DA. Mechanism for the Phase Transition of a Genetically Engineered Elastin Model Peptide (VPGIG)40in Aqueous Solution. Biomacromolecules 2003; 4:1680-5. [PMID: 14606895 DOI: 10.1021/bm034120l] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The concentration dependence of the pressure- and temperature-induced cloud point transition (Pc and Tc, respectively) of aqueous solutions of an elastin-like polypeptide with a repeating pentapeptide Val-Pro-Gly-Ile-Gly sequence (MGLDGSMG(VPGIG)40VPLE) was investigated by using apparent light scattering, differential scanning calorimetry, and circular dichroism methods. In addition, the effects of salts and surfactants on these properties were investigated. The Pc and Tc of the present peptide in aqueous solution were strongly concentration dependent. The calorimetric measurements showed that the enthalpy of transitions was 300-400 kJ/mol, i.e., 7-10 kJ/mol per VPGIG pentamer. The Tc of the (VPGIG)40 solution was highly affected by the addition of inert salts or SDS. The effects of salts were consistent with those observed in the lyotropic series or Hoffmeister series. The CD spectrum at low peptide concentrations indicated that the present peptide forms type II beta-turn-like structure(s) at higher temperatures, but the temperature dependence of random coil diminishment (195 nm) and beta-turn formation (210 nm) were not exactly coincident. A hypothetical mechanism of the (VPGIG)40 phase transition that could account for these observations was postulated. Observations suggest that the temperature-responsive properties of the elastin model peptides occur via a mechanism involving conformational change-association-aggregation and that the first two are strongly interactive.
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Affiliation(s)
- Tetsuji Yamaoka
- Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto 606-8585, Japan
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38
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Serizawa T, Nakashima Y, Akashi M. Stepwise Fabrication and Characterization of Ultrathin Hydrogels Prepared from Poly(vinylamine-co-N-vinylformamide) and Poly(acrylic acid) on a Solid Substrate. Macromolecules 2003. [DOI: 10.1021/ma021500a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takeshi Serizawa
- Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Yumiko Nakashima
- Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Mitsuru Akashi
- Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
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39
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Serizawa T, Kawanishi N, Akashi M. Layer-by-Layer Assembly between Poly(vinylamine hydrochloride-co-N-vinylformamide) with Variable Primary Amine Content and Poly(sodium styrenesulfonate). Macromolecules 2003. [DOI: 10.1021/ma020734r] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takeshi Serizawa
- Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, Korimoto 1-21-40, Kagoshima 890-0065, Japan
| | - Nami Kawanishi
- Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, Korimoto 1-21-40, Kagoshima 890-0065, Japan
| | - Mitsuru Akashi
- Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, Korimoto 1-21-40, Kagoshima 890-0065, Japan
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40
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Yoshida E, Kunugi S. Micelle Formation of Nonamphiphilic Diblock Copolymers through Noncovalent Bond Cross-Linking. Macromolecules 2002. [DOI: 10.1021/ma020275u] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eri Yoshida
- Department of Polymer Science and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo, Kyoto 606-8585, Japan
| | - Shigeru Kunugi
- Department of Polymer Science and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo, Kyoto 606-8585, Japan
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41
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Kunugi S, Tada T, Tanaka N, Yamamoto K, Akashi M. Microcalorimetric Study of Aqueous Solution of a Thermoresponsive Polymer, poly(N-vinylisobutyramide) (PNVIBA). Polym J 2002. [DOI: 10.1295/polymj.34.383] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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Abstract
The pressure-temperature phase diagram of various biomolecules is reviewed. Special attention is focused on the elliptic phase diagram of proteins. The phenomenological thermodynamic theory describing this diagram explains the heat, cold and pressure denaturations in a unified picture. The limitations and possible developments of this theory are discussed as well. It is pointed out that a more complex diagram can be obtained when the intermolecular interactions are also taken into account. In this case metastable states appear on the pressure-temperature (p-T) diagram due to intermolecular interactions. Pressure-temperature phase diagrams of other biopolymers are also discussed. While the p-T diagrams of helix-coil transition of nucleic acids and of gel-liquid crystal transition of lipid bilayers are non-elliptical, those of gelatinization of starch and of phase separation of some synthetic polymers show an elliptic profile, similar to that of proteins. Finally, the p-T diagram of bacterial inactivation is shown to be elliptic. From the point of view of basic science, this fact shows that the key factor of inactivation should be the protein type, and from the viewpoint of practical applications, it serves as the theoretical basis of pressure treatment of biosystems.
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Affiliation(s)
- László Smeller
- Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary.
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43
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Randolph TW, Seefeldt M, Carpenter JF. High hydrostatic pressure as a tool to study protein aggregation and amyloidosis. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1595:224-34. [PMID: 11983398 DOI: 10.1016/s0167-4838(01)00346-6] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Aggregation of proteins is a serious problem, affecting both industrial production of proteins and human health. Despite recent advances in the theories and experimental techniques available to address understanding of protein aggregation processes, mechanisms of aggregate formation have proved challenging to study. This is in part because the typical irreversibility of protein aggregation processes at atmospheric conditions complicates analysis of their kinetics and thermodynamics. Because high hydrostatic pressures act to disfavor the hydrophobic and electrostatic interactions that cause protein aggregation, studies conducted under high hydrostatic pressures may allow protein aggregates to be formed reversibly, enabling thermodynamic and kinetic parameters to be measured in greater detail. Although application of high hydrostatic pressures to protein aggregation problems is rather recent, a growing literature, reviewed herein, suggests that high pressure may be a useful tool for both understanding protein aggregation and reversing it in industrial applications.
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Affiliation(s)
- Theodore W Randolph
- Department of Chemical Engineering, University of Colorado, Boulder, CO 80309, USA.
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44
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Kunugi S, Tanaka N. Cold denaturation of proteins under high pressure. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1595:329-44. [PMID: 11983406 DOI: 10.1016/s0167-4838(01)00354-5] [Citation(s) in RCA: 111] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The advantageous usage of the high pressure technique in studies of cold denaturation of proteins is reviewed, with a brief explanation of the theoretical background of this universal phenomenon. Various experimental results are presented and discussed, explaining the plausible image of the cold denatured state of proteins. In order to understand more clearly this phenomenon and protein structure transition in general, several studies on model polymer systems are also reviewed.
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Affiliation(s)
- Shigeru Kunugi
- Laboratory for Biopolymer Chemistry, Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto, Japan.
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45
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Serizawa T, Nanameki K, Yamamoto K, Akashi M. Thermoresponsive Ultrathin Hydrogels Prepared by Sequential Chemical Reactions. Macromolecules 2002. [DOI: 10.1021/ma011465s] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takeshi Serizawa
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Kazuhisa Nanameki
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Kazuya Yamamoto
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
| | - Mitsuru Akashi
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan
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46
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Yamamoto K, Serizawa T, Muraoka Y, Akashi M. Synthesis and Functionalities of Poly(N-vinylalkylamide). 13. Synthesis and Properties of Thermal and pH Stimuli-Responsive Poly(vinylamine) Copolymers. Macromolecules 2001. [DOI: 10.1021/ma0102969] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuya Yamamoto
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan, and Department of Home Economics, Faculty of Education, Kagoshima University, 1-20-6 Korimoto, Kagoshima 890-0065, Japan
| | - Takeshi Serizawa
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan, and Department of Home Economics, Faculty of Education, Kagoshima University, 1-20-6 Korimoto, Kagoshima 890-0065, Japan
| | - Yoichiro Muraoka
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan, and Department of Home Economics, Faculty of Education, Kagoshima University, 1-20-6 Korimoto, Kagoshima 890-0065, Japan
| | - Mitsuru Akashi
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan, and Department of Home Economics, Faculty of Education, Kagoshima University, 1-20-6 Korimoto, Kagoshima 890-0065, Japan
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47
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Lee J, Macosko CW, Urry DW. Mechanical Properties of Cross-Linked Synthetic Elastomeric Polypentapeptides. Macromolecules 2001. [DOI: 10.1021/ma0017844] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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49
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Abstract
The gelatinization of rice starch is reported as a function of temperature and pressure from the changes in the ir spectrum. The diagram that is observed is reminiscent of those obtained for the denaturation of proteins and the phase separation observed from the cloud point for several water soluble synthetic polymers. It is proposed that the reentrant shape of the diagram for starch is not only due to hydrogen bonding but also to the imperfect packing of amylose and amylopectin chains in the starch granule. The influence of pressure and temperature on thermodynamic parameters leading to this diagram is discussed.
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Affiliation(s)
- P Rubens
- Department of Chemistry, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
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50
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Yamamoto K, Serizawa T, Muraoka Y, Akashi M. Synthesis and functionalities of poly(N-vinylalkylamide). XII. Synthesis and thermosensitive property of poly(vinylamine) copolymer prepared from poly(N-vinylformamide-co-N-vinylisobutyramide). ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1099-0518(20001001)38:19<3674::aid-pola210>3.0.co;2-n] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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