1
|
O Gomes G, Stanley HE, Souza MD. Enhanced Grüneisen Parameter in Supercooled Water. Sci Rep 2019; 9:12006. [PMID: 31427698 PMCID: PMC6700159 DOI: 10.1038/s41598-019-48353-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 08/01/2019] [Indexed: 11/24/2022] Open
Abstract
We use the recently-proposed compressible cell Ising-like model to estimate the ratio between thermal expansivity and specific heat (the Grüneisen parameter Γs) in supercooled water. Near the critical pressure and temperature, Γs becomes significantly sensitive to thermal fluctuations of the order-parameter, a characteristic behavior of pressure-induced critical points. Such enhancement of Γs indicates that two energy scales are governing the system, namely the coexistence of high- and low-density liquids, which become indistinguishable at the critical point in the supercooled phase. The temperature dependence of the compressibility, sound velocity and pseudo-Grüneisen parameter Γw are also reported. Our findings support the proposed liquid-liquid critical point in supercooled water in the No-Man's Land regime, and indicates possible applications of this model to other systems. In particular, an application of the model to the qualitative behavior of the Ising-like nematic phase in Fe-based superconductors is also presented.
Collapse
Affiliation(s)
- Gabriel O Gomes
- University of São Paulo, Department of Astronomy, São Paulo, 05508-090, Brazil
| | | | - Mariano de Souza
- São Paulo State University, IGCE - Department of Physics, Rio Claro, SP, 13506-900, Brazil.
| |
Collapse
|
2
|
|
3
|
Gromnitskaya EL, Danilov IV, Lyapin AG, Brazhkin VV. Elastic properties of liquid and glassy propane-based alcohols under high pressure: the increasing role of hydrogen bonds in a homologous family. Phys Chem Chem Phys 2019; 21:2665-2672. [PMID: 30657511 DOI: 10.1039/c8cp07588c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have measured the elastic moduli of liquid and glassy n-propanol and propylene glycol (PG) under pressure by ultrasonic techniques and have recalculated similar characteristics for glycerol from the previous experiment. All three substances form a ternary homologous family with the common formula C3H8-n(OH)n (n = 1, 2, 3), where the number of hydrogen bonds per molecule increases with the number of oxygen atoms approximately as ≈2n. In turn, the enhancement of hydrogen bonding results in an increase in elastic moduli (bulk modulus for liquids or bulk and shear moduli for glasses) from n-propanol to glycerol at all pressures, while the volume per molecule Vm shows the opposite trend at atmospheric pressure in spite of an increase in the molecular size. Nevertheless, the ratios between the Vm values at pressure P > 0.05 GPa are inverted in liquids and tend to the ratios of molecule volumes which indicates a decrease of the relative contribution of hydrogen bonds to the repulsive intermolecular forces with increasing pressure regardless of increase or decrease in the number of hydrogen bonds and their strength. A similar volume behavior is observed for glasses at T = 77 K. We have also established that the relative difference between corresponding moduli of liquid or glassy n-propanol and PG is remarkably less than that between corresponding values for PG and glycerol. We explain this property by the formation of a three-dimensional network of hydrogen bonds in glycerol, where the number of hydrogen bonds per molecule is close to six.
Collapse
Affiliation(s)
- E L Gromnitskaya
- Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow, 108840, Russia.
| | | | | | | |
Collapse
|
4
|
Schroer MA, Lehmkühler F, Möller J, Lange H, Grübel G, Schulz F. Pressure-Stimulated Supercrystal Formation in Nanoparticle Suspensions. J Phys Chem Lett 2018; 9:4720-4724. [PMID: 30070842 DOI: 10.1021/acs.jpclett.8b02145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanoparticles can self-organize into "supercrystals" with many potential applications. Different paths can lead to nanoparticle self-organization into such periodic arrangements. An essential step is the transition from an amorphous state to the crystalline one. We investigate how pressure can induce a phase transition of a nanoparticle model system in water from the disordered liquid state to highly ordered supercrystals. We observe reversible pressure-induced supercrystal formation in concentrated solutions of gold nanoparticles by means of small-angle X-ray scattering. The supercrystal formation occurs only at high salt concentrations in the aqueous solution. The pressure dependence of the structural parameters of the resulting crystal lattices is determined. The observed transition can be reasoned with the combined effect of salt and pressure on the solubility of the organic PEG shell that passivates the nanoparticles.
Collapse
Affiliation(s)
- Martin A Schroer
- European Molecular Biology Laboratory (EMBL) , Hamburg Outstation c/o DESY , 22607 Hamburg , Germany
| | - Felix Lehmkühler
- Deutsches Elektronen-Synchrotron (DESY) , 22607 Hamburg , Germany
- The Hamburg Centre for Ultrafast Imaging (CUI) , 22761 Hamburg , Germany
| | - Johannes Möller
- European X-Ray Free-Electron Laser Facility (XFEL) , 22869 Schenefeld , Germany
| | - Holger Lange
- The Hamburg Centre for Ultrafast Imaging (CUI) , 22761 Hamburg , Germany
- University of Hamburg, Institute of Physical Chemistry , 20146 Hamburg , Germany
| | - Gerhard Grübel
- Deutsches Elektronen-Synchrotron (DESY) , 22607 Hamburg , Germany
- The Hamburg Centre for Ultrafast Imaging (CUI) , 22761 Hamburg , Germany
| | - Florian Schulz
- The Hamburg Centre for Ultrafast Imaging (CUI) , 22761 Hamburg , Germany
- University of Hamburg, Institute of Physical Chemistry , 20146 Hamburg , Germany
| |
Collapse
|
5
|
Lee BS. Pressure, temperature and concentration effects on hydrogen bonding in poly(ethylene oxide) aqueous solution. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.127] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
6
|
Zhao B, Lindeboom T, Benner S, Jackson G, Galindo A, Hall CK. Predicting the Fluid-Phase Behavior of Aqueous Solutions of ELP (VPGVG) Sequences Using SAFT-VR. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:11733-11745. [PMID: 28789526 DOI: 10.1021/acs.langmuir.7b02249] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The statistical associating fluid theory for potentials of variable range (SAFT-VR) is used to predict the fluid phase behavior of elastin-like polypeptide (ELP) sequences in aqueous solution with special focus on the loci of lower critical solution temperatures (LCSTs). A SAFT-VR model for these solutions is developed following a coarse-graining approach combining information from atomistic simulations and from previous SAFT models for previously reported relevant systems. Constant-pressure temperature-composition phase diagrams are determined for solutions of (VPGVG)n sequences + water with n = 1 to 300. The SAFT-VR equation of state lends itself to the straightforward calculation of phase boundaries so that complete fluid-phase equilibria can be calculated efficiently. A broad range of thermodynamic conditions of temperature and pressure are considered, and regions of vapor-liquid and liquid-liquid coexistence, including LCSTs, are found. The calculated phase boundaries at low concentrations match those measured experimentally. The temperature-composition phase diagrams of the aqueous ELP solutions at low pressure (0.1 MPa) are similar to those of types V and VI phase behavior in the classification of Scott and van Konynenburg. An analysis of the high-pressure phase behavior confirms, however, that a closed-loop liquid-liquid immiscibility region, separate from the gas-liquid envelope, is present for aqueous solutions of (VPGVG)30; such a phase diagram is typical of type VI phase behavior. ELPs with shorter lengths exhibit both liquid-liquid and gas-liquid regions, both of which become less extensive as the chain length of the ELP is decreased. The strength of the hydrogen-bonding interaction is also found to affect the phase diagram of the (VPGVG)30 system in that the liquid-liquid and gas-liquid regions expand as the hydrogen-bonding strength is decreased and shrink as it is increased. The LCSTs of the mixtures are seen to decrease as the ELP chain length is increased.
Collapse
Affiliation(s)
- Binwu Zhao
- Department of Chemical and Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27606, United States
| | - Tom Lindeboom
- Department of Chemical Engineering, Imperial College London , London SW7 2AZ, United Kingdom
| | - Steven Benner
- Department of Chemical and Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27606, United States
| | - George Jackson
- Department of Chemical Engineering, Imperial College London , London SW7 2AZ, United Kingdom
| | - Amparo Galindo
- Department of Chemical Engineering, Imperial College London , London SW7 2AZ, United Kingdom
| | - Carol K Hall
- Department of Chemical and Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27606, United States
| |
Collapse
|
7
|
Wikarek M, Pawlus S, Tripathy SN, Szulc A, Paluch M. How Different Molecular Architectures Influence the Dynamics of H-Bonded Structures in Glass-Forming Monohydroxy Alcohols. J Phys Chem B 2016; 120:5744-52. [DOI: 10.1021/acs.jpcb.6b01458] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Wikarek
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - S. Pawlus
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Satya N. Tripathy
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - A. Szulc
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - M. Paluch
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| |
Collapse
|
8
|
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]
|
9
|
Dudowicz J, Freed KF, Douglas JF. Solvation of polymers as mutual association. I. General theory. J Chem Phys 2013; 138:164901. [DOI: 10.1063/1.4800074] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
|
10
|
Dudowicz J, Freed KF, Douglas JF. Solvation of polymers as mutual association. II. Basic thermodynamic properties. J Chem Phys 2013; 138:164902. [DOI: 10.1063/1.4800082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
11
|
|
12
|
Oh SY, Yang HE, Bae YC. Molecular simulations and thermodynamic modeling for closed-loop phase miscibility of aqueous PEO solutions. Macromol Res 2013. [DOI: 10.1007/s13233-013-1121-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
13
|
|
14
|
Elbert DL. Liquid-liquid two-phase systems for the production of porous hydrogels and hydrogel microspheres for biomedical applications: A tutorial review. Acta Biomater 2011; 7:31-56. [PMID: 20659596 PMCID: PMC2967636 DOI: 10.1016/j.actbio.2010.07.028] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2010] [Revised: 07/14/2010] [Accepted: 07/21/2010] [Indexed: 01/17/2023]
Abstract
Macroporous hydrogels may have direct applications in regenerative medicine as scaffolds to support tissue formation. Hydrogel microspheres may be used as drug-delivery vehicles or as building blocks to assemble modular scaffolds. A variety of techniques exist to produce macroporous hydrogels and hydrogel microspheres. A subset of these relies on liquid-liquid two-phase systems. Within this subset, vastly different types of polymerization processes are found. In this review, the history, terminology and classification of liquid-liquid two-phase polymerization and crosslinking are described. Instructive examples of hydrogel microsphere and macroporous scaffold formation by precipitation/dispersion, emulsion and suspension polymerizations are used to illustrate the nature of these processes. The role of the kinetics of phase separation in determining the morphology of scaffolds and microspheres is also delineated. Brief descriptions of miniemulsion, microemulsion polymerization and ionotropic gelation are also included.
Collapse
Affiliation(s)
- Donald L Elbert
- Department of Biomedical Engineering, Center for Materials Innovation, Washington University in St. Louis, MO 63130, USA.
| |
Collapse
|
15
|
Crisman RL, Randolph TW. Crystallization of recombinant human growth hormone at elevated pressures: Pressure effects on PEG-induced volume exclusion interactions. Biotechnol Bioeng 2010; 107:663-72. [DOI: 10.1002/bit.22832] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
16
|
Adrjanowicz K, Kaminski K, Wojnarowska Z, Dulski M, Hawelek L, Pawlus S, Paluch M, Sawicki W. Dielectric Relaxation and Crystallization Kinetics of Ibuprofen at Ambient and Elevated Pressure. J Phys Chem B 2010; 114:6579-93. [DOI: 10.1021/jp910009b] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. Adrjanowicz
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - K. Kaminski
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - Z. Wojnarowska
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - M. Dulski
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - L. Hawelek
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - S. Pawlus
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - M. Paluch
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - W. Sawicki
- Department of Pharmaceutical Technology, Medical University of Gdansk, Hallera 107, 80-416, Gdansk, Poland
| |
Collapse
|
17
|
Simmons DS, Sanchez IC. Pressure Effects on Polymer Coil−Globule Transitions near an LCST. Macromolecules 2010. [DOI: 10.1021/ma901485y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David S. Simmons
- Department of Chemical Engineering, The University of Texas at Austin, 1 University Station C0400, Austin, Texas 78712-0231
| | - Isaac C. Sanchez
- Department of Chemical Engineering, The University of Texas at Austin, 1 University Station C0400, Austin, Texas 78712-0231
| |
Collapse
|
18
|
Asatekin A, Mayes AM. Responsive Pore Size Properties of Composite NF Membranes Based on PVDF Graft Copolymers. SEP SCI TECHNOL 2009. [DOI: 10.1080/01496390903212516] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
19
|
Kostko AF, Harden JL, McHugh MA. Dynamic Light Scattering Study of Concentrated Triblock Copolymer Micellar Solutions under Pressure. Macromolecules 2009. [DOI: 10.1021/ma802503s] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. F. Kostko
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23284
- Department of Physics, St. Petersburg State University of Refrigeration and Food Engineering, St. Petersburg, 191002, Russia
| | - J. L. Harden
- Department of Physics, University of Ottawa, Ottawa, ON K1N 6N5 Canada
| | - M. A. McHugh
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23284
| |
Collapse
|
20
|
Clark GNI, Galindo A, Jackson G, Rogers S, Burgess AN. Modeling and Understanding Closed-Loop Liquid−Liquid Immiscibility in Aqueous Solutions of Poly(ethylene glycol) Using the SAFT-VR Approach with Transferable Parameters. Macromolecules 2008. [DOI: 10.1021/ma8007898] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gary N. I. Clark
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K., and ICI Strategic Technology Group, Wilton Centre, PO Box 90, Redcar TS90 8JE, U.K
| | - Amparo Galindo
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K., and ICI Strategic Technology Group, Wilton Centre, PO Box 90, Redcar TS90 8JE, U.K
| | - George Jackson
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K., and ICI Strategic Technology Group, Wilton Centre, PO Box 90, Redcar TS90 8JE, U.K
| | - Steve Rogers
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K., and ICI Strategic Technology Group, Wilton Centre, PO Box 90, Redcar TS90 8JE, U.K
| | - Andrew N. Burgess
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K., and ICI Strategic Technology Group, Wilton Centre, PO Box 90, Redcar TS90 8JE, U.K
| |
Collapse
|
21
|
Osaka N, Miyazaki S, Okabe S, Endo H, Sasai A, Seno KI, Aoshima S, Shibayama M. Pressure-induced reentrant micellization of amphiphilic block copolymers in dilute aqueous solutions. J Chem Phys 2007; 127:094905. [PMID: 17824763 DOI: 10.1063/1.2766942] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The pressure-induced structural changes of a block copolymer, poly(2-ethoxyethoxyethyl vinyl ether)-block-poly(2-hydroxyethyl vinyl ether) (pEOEOVE-b-pHOVE) in aqueous solutions, were studied by means of small-angle neutron scattering (SANS) and dynamic light scattering (DLS) from atmospheric pressure up to 400 MPa. pEOEOVE-b-pHOVE formed a spherical micellar structure above 40 degrees C due to poor solubility of pEOEOVE. Micellization phase diagram was determined by DLS, and a covex-upward pressure-temperature (P-T) phase diagram was obtained having a peak around (P,T)=(150 MPa,48 degrees C). The SANS curves at 50 degrees C were analyzed as a function of P. The micellar core size decreased by pressurizing at low P's (P<or=150 MPa) and then increased by further pressurizing (150 MPa<P<400 MPa). It was confirmed that the water volume fraction in the micellar core was larger at high P's than that at low P's even when the core sizes are the same at both pressure regions. This means that the temperature dependence of hydration is more selective at low pressures than at high pressures, in good accordance with our previous results on concentrated aqueous solutions of block copolymers [Phys. Rev. Lett. 96, 048303 (2006)].
Collapse
Affiliation(s)
- Noboru Osaka
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, Tokai, Ibaraki 319-1106, Japan
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Okada Y, Tanaka F, Kujawa P, Winnik FM. Unified model of association-induced lower critical solution temperature phase separation and its application to solutions of telechelic poly(ethylene oxide) and of telechelic poly(N-isopropylacrylamide) in water. J Chem Phys 2006; 125:244902. [PMID: 17199370 DOI: 10.1063/1.2400230] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The authors present a model describing the coexistence of hydrophobic association and phase separation with lower critical solution temperature (LCST) in aqueous solutions of polymers carrying short hydrophobic chains at both chain ends (telechelic associating polymers). The LCST of these solutions is found to decrease along the sol/gel transition curve as a result of both end-chain association (association-induced phase separation) and direct hydrophobic interaction of the end chains with water. The authors relate the magnitude of the LCST decrease to a hydration cooperativity parameter sigma. The LCST decreases substantially (approximately 100 K) in the case of random hydration (sigma=1), whereas only a small shift (approximately 5-10 K) occurs in the case of cooperative hydration (sigma=0.3). The molecular weight dependence of the LCST drop is studied in detail in each case. The results are compared with experimental observations of the cloud points of telechelic poly(ethylene oxide) solutions, in which random hydration predominates, and of telechelic poly(N-isopropylacrylamide) solutions, in which cooperative hydration prevails.
Collapse
Affiliation(s)
- Yukinori Okada
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | | | | | | |
Collapse
|
23
|
Roland CM, Bair S, Casalini R. Thermodynamic scaling of the viscosity of van der Waals, H-bonded, and ionic liquids. J Chem Phys 2006; 125:124508. [PMID: 17014192 DOI: 10.1063/1.2346679] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Viscosities eta and their temperature T and volume V dependences are reported for seven molecular liquids and polymers. In combination with literature viscosity data for five other liquids, we show that the superpositioning of relaxation times for various glass-forming materials when expressed as a function of TV(gamma), where the exponent gamma is a material constant, can be extended to the viscosity. The latter is usually measured to higher temperatures than the corresponding relaxation times, demonstrating the validity of the thermodynamic scaling throughout the supercooled and higher T regimes. The value of gamma for a given liquid principally reflects the magnitude of the intermolecular forces (e.g., steepness of the repulsive potential); thus, we find decreasing gamma in going from van der Waals fluids to ionic liquids. For some strongly H-bonded materials, such as low molecular weight polypropylene glycol and water, the superpositioning fails, due to the nontrivial change of chemical structure (degree of H bonding) with thermodynamic conditions.
Collapse
Affiliation(s)
- C M Roland
- Chemistry Division, Naval Research Laboratory, Code 6120, Washington, DC 20375-5342, USA.
| | | | | |
Collapse
|
24
|
Casalini R, Mohanty U, Roland CM. Thermodynamic interpretation of the scaling of the dynamics of supercooled liquids. J Chem Phys 2006; 125:014505. [PMID: 16863314 DOI: 10.1063/1.2206582] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The recently discovered scaling law for the relaxation times, tau(T,upsilon) = I(Tupsilon(gamma)), where T is temperature and upsilon the specific volume, is derived by a revision of the entropy model of the glass transition dynamics originally proposed by Avramov [J. Non-Cryst. Solids 262, 258 (2000)]. In this modification the entropy is calculated by an alternative route. The resulting expression for the variation of the relaxation time with T and upsilon is shown to accurately fit experimental data for several glass-forming liquids and polymers over an extended range encompassing the dynamic crossover. From this analysis, which is valid for any model in which the relaxation time is a function of the entropy, we find that the scaling exponent gamma can be identified with the Gruneisen constant.
Collapse
Affiliation(s)
- R Casalini
- Naval Research Laboratory, Chemistry Division, Washington DC 20375-5342, USA.
| | | | | |
Collapse
|
25
|
Roland CM, McGrath KJ, Casalini R. Dynamic Heterogeneity in Poly(vinyl methyl ether)/Poly(2-chlorostyrene) Blends. Macromolecules 2006. [DOI: 10.1021/ma060315k] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. M. Roland
- Chemistry Division, Naval Research Laboratory, Code 6120, Washington DC 20375-5342, and Chemistry Department, George Mason University, Fairfax, Virginia 22030
| | - K. J. McGrath
- Chemistry Division, Naval Research Laboratory, Code 6120, Washington DC 20375-5342, and Chemistry Department, George Mason University, Fairfax, Virginia 22030
| | - R. Casalini
- Chemistry Division, Naval Research Laboratory, Code 6120, Washington DC 20375-5342, and Chemistry Department, George Mason University, Fairfax, Virginia 22030
| |
Collapse
|
26
|
Folding and Formation of Mesoglobules in Dilute Copolymer Solutions. CONFORMATION-DEPENDENT DESIGN OF SEQUENCES IN COPOLYMERS I 2006. [DOI: 10.1007/12_050] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
27
|
Okada Y, Tanaka F. Cooperative Hydration, Chain Collapse, and Flat LCST Behavior in Aqueous Poly(N-isopropylacrylamide) Solutions. Macromolecules 2005. [DOI: 10.1021/ma0502497] [Citation(s) in RCA: 347] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
28
|
Prevosto D, Capaccioli S, Lucchesi M, Rolla PA, Paluch M, Pawlus S, Zioło J. Emergence of a new feature in the high pressure-high temperature relaxation spectrum of tri-propylene glycol. J Chem Phys 2005; 122:061102. [PMID: 15740359 DOI: 10.1063/1.1858857] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigated dielectric relaxation of a tri-propylene glycol system under high compression. By increasing temperature and pressure we observed that a new relaxation process emerges from the low frequency tail of the structural peak. This new peak starts to be visible at about 0.5 GPa and becomes clearly evident at 1.7 GPa. However, this additional peak merges again with the structural one as the glass transition is approached, since it has a weaker temperature dependence. This finding enriches the relaxation scenario of molecular glass formers confirming that the application of very high hydrostatic pressure can favor the detection of new relaxation or otherwise unresolved processes in supercooled liquid systems.
Collapse
Affiliation(s)
- D Prevosto
- INFM and Dipartimento di Fisica Università di Pisa, Largo Pontecorvo 3, I-56127 Pisa, Italy
| | | | | | | | | | | | | |
Collapse
|
29
|
Ho DL, Hammouda B, Kline SR, Chen WR. Unusual phase behavior in mixtures of poly(ethylene oxide) and ethyl alcohol. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/polb.20726] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
30
|
Ngai KL, Paluch M. Classification of secondary relaxation in glass-formers based on dynamic properties. J Chem Phys 2004; 120:857-73. [PMID: 15267922 DOI: 10.1063/1.1630295] [Citation(s) in RCA: 472] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Dynamic properties, derived from dielectric relaxation spectra of glass-formers at variable temperature and pressure, are used to characterize and classify any resolved or unresolved secondary relaxation based on their different behaviors. The dynamic properties of the secondary relaxation used include: (1) the pressure and temperature dependences; (2) the separation between its relaxation time taubeta and the primary relaxation time taualpha at any chosen taualpha; (3) whether taubeta is approximately equal to the independent (primitive) relaxation time tau0 of the coupling model; (4) whether both taubeta and tau0 have the same pressure and temperature dependences; (5) whether it is responsible for the "excess wing" of the primary relaxation observed in some glass-formers; (6) how the excess wing changes on aging, blending with another miscible glass-former, or increasing the molecular weight of the glass-former; (7) the change of temperature dependence of its dielectric strength Deltaepsilonbeta and taubeta across the glass transition temperature Tg; (8) the changes of Deltaepsilonbeta and taubeta with aging below Tg; (9) whether it arises in a glass-former composed of totally rigid molecules without any internal degree of freedom; (10) whether only a part of the molecule is involved; and (11) whether it tends to merge with the alpha-relaxation at temperatures above Tg. After the secondary relaxations in many glass-formers have been characterized and classified, we identify the class of secondary relaxations that bears a strong connection or correlation to the primary relaxation in all the dynamic properties. Secondary relaxations found in rigid molecular glass-formers belong to this class. The secondary relaxations in this class play the important role as a precursor or local step of the primary relaxation, and we propose that only they should be called the Johari-Goldstein beta-relaxation.
Collapse
Affiliation(s)
- K L Ngai
- Naval Research Laboratory, Washington, DC 20375-5320, USA
| | | |
Collapse
|
31
|
Casalini R, Roland CM. Dielectric α-relaxation and ionic conductivity in propylene glycol and its oligomers measured at elevated pressure. J Chem Phys 2003. [DOI: 10.1063/1.1624401] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
32
|
Zhang SH, Casalini R, Runt J, Roland CM. Pressure Effects on the Segmental Dynamics of Hydrogen-Bonded Polymer Blends. Macromolecules 2003. [DOI: 10.1021/ma035213y] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S. H. Zhang
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802; Chemistry Division, Code 6120, Naval Research Laboratory, Washington D.C. 20375-5342; and Chemistry Department, George Mason University, Fairfax, Virginia 22030
| | - R. Casalini
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802; Chemistry Division, Code 6120, Naval Research Laboratory, Washington D.C. 20375-5342; and Chemistry Department, George Mason University, Fairfax, Virginia 22030
| | - J. Runt
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802; Chemistry Division, Code 6120, Naval Research Laboratory, Washington D.C. 20375-5342; and Chemistry Department, George Mason University, Fairfax, Virginia 22030
| | - C. M. Roland
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802; Chemistry Division, Code 6120, Naval Research Laboratory, Washington D.C. 20375-5342; and Chemistry Department, George Mason University, Fairfax, Virginia 22030
| |
Collapse
|
33
|
Lesemann M, Nathan H, DiNoia TP, Kirby CF, McHugh MA, van Zanten JH, Paulaitis ME. Self-Assembly at High Pressures: SANS Study of the Effect of Pressure on Microstructure of C8E5 Micelles in Water. Ind Eng Chem Res 2003. [DOI: 10.1021/ie0302387] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Lesemann
- Department of Chemical Engineering, The Johns Hopkins University, Baltimore, Maryland 21218
| | - H. Nathan
- Department of Chemical Engineering, The Johns Hopkins University, Baltimore, Maryland 21218
| | - T. P. DiNoia
- Department of Chemical Engineering, The Johns Hopkins University, Baltimore, Maryland 21218
| | - C. F. Kirby
- Department of Chemical Engineering, The Johns Hopkins University, Baltimore, Maryland 21218
| | - M. A. McHugh
- Department of Chemical Engineering, The Johns Hopkins University, Baltimore, Maryland 21218
| | - J. H. van Zanten
- Department of Chemical Engineering, The Johns Hopkins University, Baltimore, Maryland 21218
| | - M. E. Paulaitis
- Department of Chemical Engineering, The Johns Hopkins University, Baltimore, Maryland 21218
| |
Collapse
|
34
|
Hu T, Wu C. Grafting Density Induced Stretching and Collapse of Tethered Poly(ethylene oxide) Chains on a Thermally Sensitive Microgel. Macromolecules 2001. [DOI: 10.1021/ma010391h] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tengjiao Hu
- The Open Laboratory of Bond-selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China, and Department of Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong
| | - Chi Wu
- The Open Laboratory of Bond-selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China, and Department of Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong
| |
Collapse
|
35
|
|
36
|
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.
Collapse
Affiliation(s)
- P Rubens
- Department of Chemistry, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
| | | |
Collapse
|
37
|
Goutev N, Ohno K, Matsuura H. Raman Spectroscopic Study on the Conformation of 1,2-Dimethoxyethane in the Liquid Phase and in Aqueous Solutions. J Phys Chem A 2000. [DOI: 10.1021/jp001340+] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
38
|
|
39
|
Hillson N, Onuchic JN, García AE. Pressure-induced protein-folding/unfolding kinetics. Proc Natl Acad Sci U S A 1999; 96:14848-53. [PMID: 10611301 PMCID: PMC24736 DOI: 10.1073/pnas.96.26.14848] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We use an off-lattice minimalist model to describe the effects of pressure in slowing down the folding/unfolding kinetics of proteins when subjected to increasingly larger pressures. The potential energy function used to describe the interactions between beads in the model includes the effects of pressure on the pairwise interaction of hydrophobic groups in water. We show that pressure affects the participation of contacts in the transition state. More significantly, pressure exponentially decreases the chain reconfigurational diffusion coefficient. These results are consistent with experimental results on the kinetics of pressure-denaturation of staphylococcal nuclease.
Collapse
Affiliation(s)
- N Hillson
- Theoretical Biology, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | | | | |
Collapse
|
40
|
Fauré MC, Bassereau P, Lee LT, Menelle A, Lheveder C. Phase Transitions in Monolayers of PS−PEO Copolymer at the Air−Water Interface. Macromolecules 1999. [DOI: 10.1021/ma9900840] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - C. Lheveder
- Laboratoire de Physique Statistique de l'Ecole Normale Supérieure, 24 Rue Lhomond, 75231 Paris Cedex 05, France
| |
Collapse
|
41
|
Van Hook WA, Wilczura H, Imre A, Rebelo LPN, Melnichenko YB. Correlation Radii for Polystyrene (PS) in Poor and ϑ Solvents from Dynamic Light and Small Angle Neutron Scattering. New Data for PS/Acetone. Remarks on PS/Acetone, PS/Cyclohexane, and PS/Methylcyclohexane. Macromolecules 1999. [DOI: 10.1021/ma9902394] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Hannah Wilczura
- Chemistry Department, University of Tennessee, Knoxville, Tennessee 37996
| | - Attila Imre
- Chemistry Department, University of Tennessee, Knoxville, Tennessee 37996
| | - Luis P. N. Rebelo
- Chemistry Department, University of Tennessee, Knoxville, Tennessee 37996
| | - Yuri B. Melnichenko
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| |
Collapse
|
42
|
Briscoe B, Luckham P, Zhu S. On the effects of water solvency towards non–ionic polymers. Proc Math Phys Eng Sci 1999. [DOI: 10.1098/rspa.1999.0332] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- B. Briscoe
- Department of Chemical Engineering, Imperial College of Science, Technology and Medicine, London SW7 2BY, UK
| | - P. Luckham
- Department of Chemical Engineering, Imperial College of Science, Technology and Medicine, London SW7 2BY, UK
| | - S. Zhu
- Department of Chemical Engineering, Imperial College of Science, Technology and Medicine, London SW7 2BY, UK
| |
Collapse
|
43
|
Hyde TM, Gladden LF. Simultaneous measurement of water and polymer concentration profiles during swelling of poly(ethylene oxide) using magnetic resonance imaging. POLYMER 1998. [DOI: 10.1016/s0032-3861(97)00328-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
44
|
Root LJ, Berne BJ. Effect of pressure on hydrogen bonding in glycerol: A molecular dynamics investigation. J Chem Phys 1997. [DOI: 10.1063/1.474776] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
45
|
|
46
|
Crespo Colin A, Cancho SM, Rubio RG, Compostizo A. Equation of State of Hydrogen-Bonded Polymer Solutions. Poly(propylene glycol) + n-Hexane and Poly(propylene glycol) + Ethanol. Macromolecules 1997. [DOI: 10.1021/ma961382p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amalia Crespo Colin
- Departamento Quimica Fisica I, Facultad de Quimicas, Universidad Complutense, 28040-Madrid, Spain
| | - Susana M. Cancho
- Departamento Quimica Fisica I, Facultad de Quimicas, Universidad Complutense, 28040-Madrid, Spain
| | - Ramon G. Rubio
- Departamento Quimica Fisica I, Facultad de Quimicas, Universidad Complutense, 28040-Madrid, Spain
| | - Aurora Compostizo
- Departamento Quimica Fisica I, Facultad de Quimicas, Universidad Complutense, 28040-Madrid, Spain
| |
Collapse
|
47
|
Briscoe B, Luckham P, Zhu S. Rheological Study of Poly(ethylene oxide) in Aqueous Salt Solutions at High Temperature and Pressure. Macromolecules 1996. [DOI: 10.1021/ma960667z] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- B. Briscoe
- Department of Chemical Engineering, Imperial College of Science, Technology and Medicine, London SW7 2BY, U.K
| | - P. Luckham
- Department of Chemical Engineering, Imperial College of Science, Technology and Medicine, London SW7 2BY, U.K
| | - S. Zhu
- Department of Chemical Engineering, Imperial College of Science, Technology and Medicine, London SW7 2BY, U.K
| |
Collapse
|
48
|
Sun T, King HE. Pressure-induced reentrant phase behavior in the poly(N-vinyl-2-pyrrolidone)-water system. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1996; 54:2696-2703. [PMID: 9965383 DOI: 10.1103/physreve.54.2696] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
49
|
Enriquez EP, Granick S. Chain flattening and infrared dichroism of adsorbed poly(ethylene oxide). Colloids Surf A Physicochem Eng Asp 1996. [DOI: 10.1016/0927-7757(96)03519-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
50
|
Cook RL, King HE, Herbst CA, Herschbach DR. Pressure and temperature dependent viscosity of two glass forming liquids: Glycerol and dibutyl phthalate. J Chem Phys 1994. [DOI: 10.1063/1.467276] [Citation(s) in RCA: 187] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|