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Hoffmann I, Farago B, Schweins R, Falus P, Sharp M, Prévost S, Gradzielski M. On the mesoscopic origins of high viscosities in some polyelectrolyte-surfactant mixtures. J Chem Phys 2015; 143:074902. [PMID: 26298151 DOI: 10.1063/1.4928583] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ingo Hoffmann
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC 7, D-10623 Berlin, Germany
- Institut Max von Laue-Paul Langevin (ILL), F-38042 Grenoble Cedex 9, France
| | - Bela Farago
- Institut Max von Laue-Paul Langevin (ILL), F-38042 Grenoble Cedex 9, France
| | - Ralf Schweins
- Institut Max von Laue-Paul Langevin (ILL), F-38042 Grenoble Cedex 9, France
| | - Peter Falus
- Institut Max von Laue-Paul Langevin (ILL), F-38042 Grenoble Cedex 9, France
| | - Melissa Sharp
- Institut Max von Laue-Paul Langevin (ILL), F-38042 Grenoble Cedex 9, France
| | - Sylvain Prévost
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC 7, D-10623 Berlin, Germany
- Helmholtz-Zentrum Berlin, D-14109 Berlin, Germany
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC 7, D-10623 Berlin, Germany
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Barakat A, Gaillard C, Lairez D, Saulnier L, Chabbert B, Cathala B. Supramolecular Organization of Heteroxylan-Dehydrogenation Polymers (Synthetic Lignin) Nanoparticles. Biomacromolecules 2008; 9:487-93. [DOI: 10.1021/bm7009812] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Abdellatif Barakat
- UMR614 Fractionnement des Agro-Ressources et Emballage, INRA, Université de Reims Champagne Ardennes, F-51100 Reims, France, UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France, and Laboratoire Léon Brillouin, CEA/CNRS, CEA Saclay, 91191 Gif-sur-Yvette cedex, France
| | - Cédric Gaillard
- UMR614 Fractionnement des Agro-Ressources et Emballage, INRA, Université de Reims Champagne Ardennes, F-51100 Reims, France, UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France, and Laboratoire Léon Brillouin, CEA/CNRS, CEA Saclay, 91191 Gif-sur-Yvette cedex, France
| | - Didier Lairez
- UMR614 Fractionnement des Agro-Ressources et Emballage, INRA, Université de Reims Champagne Ardennes, F-51100 Reims, France, UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France, and Laboratoire Léon Brillouin, CEA/CNRS, CEA Saclay, 91191 Gif-sur-Yvette cedex, France
| | - Luc Saulnier
- UMR614 Fractionnement des Agro-Ressources et Emballage, INRA, Université de Reims Champagne Ardennes, F-51100 Reims, France, UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France, and Laboratoire Léon Brillouin, CEA/CNRS, CEA Saclay, 91191 Gif-sur-Yvette cedex, France
| | - Brigitte Chabbert
- UMR614 Fractionnement des Agro-Ressources et Emballage, INRA, Université de Reims Champagne Ardennes, F-51100 Reims, France, UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France, and Laboratoire Léon Brillouin, CEA/CNRS, CEA Saclay, 91191 Gif-sur-Yvette cedex, France
| | - Bernard Cathala
- UMR614 Fractionnement des Agro-Ressources et Emballage, INRA, Université de Reims Champagne Ardennes, F-51100 Reims, France, UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France, and Laboratoire Léon Brillouin, CEA/CNRS, CEA Saclay, 91191 Gif-sur-Yvette cedex, France
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Gupta A, Mohanty B, Bohidar HB. Flory temperature and upper critical solution temperature of gelatin solutions. Biomacromolecules 2006; 6:1623-7. [PMID: 15877386 DOI: 10.1021/bm0492430] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Flory temperatures (theta) measured by turbidity experiments performed on gelatin solutions were found to be 12 +/- 0.3, 13 +/- 0.3, 14 +/- 0.3, 14.5 +/- 0.3, and 15 +/- 0.3 degrees C for salt concentrations 0.1, 0.075, 0.05, 0.025, and 0 M (NaCl), respectively. Estimated persistence length (l(p)) of this weakly charged polyelectrolyte could be deduced from the Benoit and Doty (J. Phys. Chem. 1953, 57, 958) relationship with the approximation that this biopolymer assumes a compact near-globular shape at Flory temperature, implying l(p) = 9(R(h))(2)/(5L(m)), where L(m) is the contour length and R(h) is the hydrodynamic radius. It was found that l(p) approximately 2.2 +/- 0.2 nm at room temperature (20 degrees C), invariant of salt concentration. The Flory expansion factor (alpha= R(h)(T)/R(h)(theta) = 1.5+/-0.2) was found to be almost constant. theta-Composition for this biopolymer was deduced from turbidimitric titration of aqueous gelatin solutions with the alcohols methanol, ethanol, 2-propanol, and tert-butyl alcohol. It appears that hydrophobic interactions play a crucial role in causing chain collapse at theta-temperature and composition.
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Affiliation(s)
- Amarnath Gupta
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India
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Magazù S, Villari V, Faraone A, Maisano G, Janssen S. Effect of the monomer structure on the dynamics of semidilute polyalkylmethacrylate solutions: A quasielastic light and neutron scattering investigation. J Chem Phys 2002. [DOI: 10.1063/1.1421355] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Adam M, Farago B, Schleger P, Raspaud E, Lairez D. Binary Contacts in Semidilute Solution: Good and ϑ Solvents. Macromolecules 1998. [DOI: 10.1021/ma980936g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Adam
- Institut Laue-Langevin, BP 156, 38042 Grenoble, France
| | - B. Farago
- Institut Laue-Langevin, BP 156, 38042 Grenoble, France
| | - P. Schleger
- Institut Laue-Langevin, BP 156, 38042 Grenoble, France
| | - E. Raspaud
- Laboratoire de Physique des Solides, CNRS URA D 002, Universite Paris Sud, 91405 Orsay Cedex, France
| | - D. Lairez
- Laboratoire Léon Brillouin (CEA-CNRS), CE-Saclay, 91191 Gif-sur-Yvette Cedex, France
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