1
|
Philippe AM, Truzzolillo D, Galvan-Myoshi J, Dieudonné-George P, Trappe V, Berthier L, Cipelletti L. Glass transition of soft colloids. Phys Rev E 2018; 97:040601. [PMID: 29758608 DOI: 10.1103/physreve.97.040601] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Indexed: 11/07/2022]
Abstract
We explore the glassy dynamics of soft colloids using microgels and charged particles interacting by steric and screened Coulomb interactions, respectively. In the supercooled regime, the structural relaxation time τ_{α} of both systems grows steeply with volume fraction, reminiscent of the behavior of colloidal hard spheres. Computer simulations confirm that the growth of τ_{α} on approaching the glass transition is independent of particle softness. By contrast, softness becomes relevant at very large packing fractions when the system falls out of equilibrium. In this nonequilibrium regime, τ_{α} depends surprisingly weakly on packing fraction, and time correlation functions exhibit a compressed exponential decay consistent with stress-driven relaxation. The transition to this novel regime coincides with the onset of an anomalous decrease in local order with increasing density typical of ultrasoft systems. We propose that these peculiar dynamics results from the combination of the nonequilibrium aging dynamics expected in the glassy state and the tendency of colloids interacting through soft potentials to refluidize at high packing fractions.
Collapse
Affiliation(s)
- Adrian-Marie Philippe
- Laboratoire Charles Coulomb (L2C), University of Montpellier, CNRS, Montpellier, France
| | - Domenico Truzzolillo
- Laboratoire Charles Coulomb (L2C), University of Montpellier, CNRS, Montpellier, France
| | | | | | - Véronique Trappe
- Department of Physics, University of Fribourg, CH-1700 Fribourg, Switzerland
| | - Ludovic Berthier
- Laboratoire Charles Coulomb (L2C), University of Montpellier, CNRS, Montpellier, France
| | - Luca Cipelletti
- Laboratoire Charles Coulomb (L2C), University of Montpellier, CNRS, Montpellier, France
| |
Collapse
|
2
|
Affiliation(s)
- Adrian-Marie Philippe
- Laboratoire
Charles Coulomb, UMR 5221, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - Luca Cipelletti
- Laboratoire
Charles Coulomb, UMR 5221, Université de Montpellier and CNRS, 34095 Montpellier, France
| | - Domenico Larobina
- Institute
for Polymers, Composites and Biomaterials, National Research Council of Italy, P.le E. Fermi 1, Naples, 80055 Portici, Italy
| |
Collapse
|
3
|
Landman J, Paineau E, Davidson P, Bihannic I, Michot LJ, Philippe AM, Petukhov AV, Lekkerkerker HNW. Effects of Added Silica Nanoparticles on the Nematic Liquid Crystal Phase Formation in Beidellite Suspensions. J Phys Chem B 2014; 118:4913-9. [DOI: 10.1021/jp500036v] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jasper Landman
- Van’t Hoff Laboratory for Physical
and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584
CH Utrecht, The Netherlands
| | - Erwan Paineau
- Laboratoire de Physique des Solides, UMR 8502 CNRS, Université Paris-Sud, Bâtiment 510, 91405 Orsay Cedex, France
| | - Patrick Davidson
- Laboratoire de Physique des Solides, UMR 8502 CNRS, Université Paris-Sud, Bâtiment 510, 91405 Orsay Cedex, France
| | - Isabelle Bihannic
- Laboratoire
Interdisciplinaire des Environnements Continentaux, UMR 7360 CNRS, Université de Lorraine, 15 avenue du Charmois, 54500 Vandoeuvre, France
| | - Laurent J. Michot
- Laboratoire
Interdisciplinaire des Environnements Continentaux, UMR 7360 CNRS, Université de Lorraine, 15 avenue du Charmois, 54500 Vandoeuvre, France
| | - Adrian-Marie Philippe
- Laboratoire d’Energétique et de Mécanique Théorique
et Appliquée, UMR 7563 CNRS, Université de Lorraine, 2 avenue
de la Forêt de Haye, TSA 60604, 54518 Vandoeuvre, France
| | - Andrei V. Petukhov
- Van’t Hoff Laboratory for Physical
and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584
CH Utrecht, The Netherlands
| | - Henk N. W. Lekkerkerker
- Van’t Hoff Laboratory for Physical
and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584
CH Utrecht, The Netherlands
| |
Collapse
|
4
|
Philippe AM, Baravian C, Bezuglyy V, Angilella JR, Meneau F, Bihannic I, Michot LJ. Rheological study of two-dimensional very anisometric colloidal particle suspensions: from shear-induced orientation to viscous dissipation. Langmuir 2013; 29:5315-5324. [PMID: 23544905 DOI: 10.1021/la400111w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In the present study, we investigate the evolution with shear of the viscosity of aqueous suspensions of size-selected natural swelling clay minerals for volume fractions extending from isotropic liquids to weak nematic gels. Such suspensions are strongly shear-thinning, a feature that is systematically observed for suspensions of nonspherical particles and that is linked to their orientational properties. We then combined our rheological measurements with small-angle X-ray scattering experiments that, after appropriate treatment, provide the orientational field of the particles. Whatever the clay nature, particle size, and volume fraction, this orientational field was shown to depend only on a nondimensional Péclet number (Pe) defined for one isolated particle as the ratio between hydrodynamic energy and Brownian thermal energy. The measured orientational fields were then directly compared to those obtained for infinitely thin disks through a numerical computation of the Fokker-Plank equation. Even in cases where multiple hydrodynamic interactions dominate, qualitative agreement between both orientational fields is observed, especially at high Péclet number. We have then used an effective approach to assess the viscosity of these suspensions through the definition of an effective volume fraction. Using such an approach, we have been able to transform the relationship between viscosity and volume fraction (ηr = f(φ)) into a relationship that links viscosity with both flow and volume fraction (ηr = f(φ, Pe)).
Collapse
Affiliation(s)
- A M Philippe
- Laboratoire d'Énergétique et de Mécanique Théorique et Appliquée, Université de Lorraine - CNRS, UMR 7563, 2 Avenue de la Forêt de Haye, TSA 60604 54518 Vandoeuvre Cedex, France.
| | | | | | | | | | | | | |
Collapse
|
5
|
Farge L, Andre S, Pawlak A, Baravian C, Irvine SC, Philippe AM. A study of the deformation-induced whitening phenomenon for cavitating and non-cavitating semicrystalline polymers. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/polb.23267] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
6
|
Paineau E, Dozov I, Philippe AM, Bihannic I, Meneau F, Baravian C, Michot LJ, Davidson P. In-situ SAXS study of aqueous clay suspensions submitted to alternating current electric fields. J Phys Chem B 2012; 116:13516-24. [PMID: 23106195 DOI: 10.1021/jp3064728] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aqueous colloidal suspensions of clay platelets display a sol/gel transition that is not yet understood. Depending on the nature of the clay, liquid-crystalline behavior may also be observed. For example, the suspensions of beidellite display a nematic phase whereas those of montmorillonite do not. Both beidellite and montmorillonite have a "TOT" structure but the structural electric charge is located in the tetrahedral layer for the former and in the octahedral layer for the latter. We built a setup to perform SAXS experiments on complex fluids submitted to an electric field in situ. We found that the fluid nematic phase of beidellite suspensions readily aligns in the field. However, the field had no influence on the gels, showing that the orientational degrees of freedom of the platelets are effectively frozen. Moreover, strong platelet alignment was induced by the field in the isotropic phase of both clays, in a similar way, regardless of their ability to form a nematic phase. This surprising result would suggest that the orientational degrees of freedom are not directly involved in the sol/gel transition. The ability to induce orientational order in the isotropic phase of clay suspensions can be exploited to prepare materials of controlled anisotropy.
Collapse
Affiliation(s)
- Erwan Paineau
- Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud, Bâtiment 510, 91405 Orsay Cedex, France.
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Paineau E, Dozov I, Bihannic I, Baravian C, Krapf MEM, Philippe AM, Rouzière S, Michot LJ, Davidson P. Tailoring highly oriented and micropatterned clay/polymer nanocomposites by applying an a.c. electric field. ACS Appl Mater Interfaces 2012; 4:4296-4301. [PMID: 22833688 DOI: 10.1021/am300980r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Clay/polymer nanocomposites have recently raised much interest because of their widespread industrial applications. Nevertheless, controlling both clay platelet exfoliation and orientation during polymerization still remains challenging. Herein, we report the elaboration of clay/polymer nanocomposite hydrogels from aqueous suspensions of natural swelling clays submitted to high-frequency a.c. electric fields. X-ray scattering experiments have confirmed the complete exfoliation of the clay sheets in the polymer matrix, even after polymerization. Moreover, polarized light microscopy shows that the clay platelets were perfectly oriented by the electric field and that this field-induced alignment was frozen in by in situ photopolymerization. This procedure allowed us to not only produce uniformly aligned samples but also pattern platelet orientation, at length scales down to 20 μm. This straightforward and cheap nanocomposite patterning technique can be easily extended to a wide range of natural or synthetic inorganic anisotropic particles.
Collapse
Affiliation(s)
- Erwan Paineau
- Laboratoire de Physique des Solides, UMR 8502, Paris-Sud University, Bâtiment 510, 91405 Orsay Cedex, France.
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Philippe AM, Baravian C, Jenny M, Meneau F, Michot LJ. Taylor-Couette instability in anisotropic clay suspensions measured using small-angle X-ray scattering. Phys Rev Lett 2012; 108:254501. [PMID: 23004605 DOI: 10.1103/physrevlett.108.254501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Indexed: 06/01/2023]
Abstract
In this Letter, we propose an original and novel experimental method to characterize both the onset and morphology of Taylor-Couette instability occurring in a non-Newtonian cylindrical Couette flow. Using synchrotron-based rheological small angle x-ray scattering experiments, we jointly investigate the shear-thinning behavior of natural swelling clays suspensions and the associated anisotropy developing in such media. Combined with a linear stability analysis for power law fluids, a destabilizing effect is shown both numerically and experimentally and the vortices morphology is found to be dependent on the fluid index. Still, the strong destabilizing effect and large vortex size can not be assigned to shear-thinning only, which clearly evidences the impact of medium anisotropy on Taylor-Couette instability.
Collapse
Affiliation(s)
- A M Philippe
- Laboratoire d'Énergétique et de Mécanique Théorique et Appliquée, Université de Lorraine - CNRS, UMR 7563, 2 Avenue de la Forêt de Haye, BP160, 54504 Vandoeuvre Lès Nancy Cedex, France.
| | | | | | | | | |
Collapse
|
9
|
Philippe AM, Baravian C, Imperor-Clerc M, De Silva J, Paineau E, Bihannic I, Davidson P, Meneau F, Levitz P, Michot LJ. Rheo-SAXS investigation of shear-thinning behaviour of very anisometric repulsive disc-like clay suspensions. J Phys Condens Matter 2011; 23:194112. [PMID: 21525562 DOI: 10.1088/0953-8984/23/19/194112] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Aqueous suspensions of swelling clay minerals exhibit a rich and complex rheological behaviour. In particular, these repulsive systems display strong shear-thinning at very low volume fractions in both the isotropic and gel states. In this paper, we investigate the evolution with shear of the orientational distribution of aqueous clay suspensions by synchrotron-based rheo-SAXS experiments using a Couette device. Measurements in radial and tangential configurations were carried out for two swelling clay minerals of similar morphology and size, Wyoming montmorillonite and Idaho beidellite. The shear evolution of the small angle x-ray scattering (SAXS) patterns displays significantly different features for these two minerals. The detailed analysis of the angular dependence of the SAXS patterns in both directions provides the average Euler angles of the statistical effective particle in the shear plane. We show that for both samples, the average orientation is fully controlled by the local shear stress around the particle. We then apply an effective approach to take into account multiple hydrodynamic interactions in the system. Using such an approach, it is possible to calculate the evolution of viscosity as a function of shear rate from the knowledge of the average orientation of the particles. The viscosity thus recalculated almost perfectly matches the measured values as long as collective effects are not too important in the system.
Collapse
Affiliation(s)
- A M Philippe
- Laboratoire d'Energétique et de Mécanique Théorique et Appliquée, Nancy University-CNRS, UMR 7563, Vandœuvre Lès Nancy, France.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Paineau E, Bihannic I, Baravian C, Philippe AM, Davidson P, Levitz P, Funari SS, Rochas C, Michot LJ. Aqueous suspensions of natural swelling clay minerals. 1. Structure and electrostatic interactions. Langmuir 2011; 27:5562-5573. [PMID: 21476528 DOI: 10.1021/la2001255] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this article, we present a general overview of the organization of colloidal charged clay particles in aqueous suspension by studying different natural samples with different structural charges and charge locations. Small-angle X-ray scattering experiments (SAXS) are first used to derive swelling laws that demonstrate the almost perfect exfoliation of clay sheets in suspension. Using a simple approach based on geometrical constraints, we show that these swelling laws can be fully modeled on the basis of morphological parameters only. The validity of this approach was further extended to other clay data from the literature, in particular, synthetic Laponite. For all of the investigated samples, experimental osmotic pressures can be properly described by a Poisson-Boltzmann approach for ionic strength up to 10(-3) M, which reveals that these systems are dominated by repulsive electrostatic interactions. However, a detailed analysis of the Poisson-Boltzmann treatment shows differences in the repulsive potential strength that are not directly linked to the structural charge of the minerals but rather to the charge location in the structure for tetrahedrally charged clays (beidellite and nontronites) undergoing stronger electrostatic repulsions than octahedrally charged samples (montmorillonites, laponite). Only minerals subjected to the strongest electrostatic repulsions present a true isotropic to nematic phase transition in their phase diagrams. The influence of ionic repulsions on the local order of clay platelets was then analyzed through a detailed investigation of the structure factors of the various clay samples. It appears that stronger electrostatic repulsions improve the liquidlike positional local order.
Collapse
Affiliation(s)
- Erwan Paineau
- Laboratoire Environnement et Minéralurgie, Nancy Université-CNRS, UMR 7569, BP40 54501 Vandœuvre Cedex, France.
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Ruban V, Brigault S, Demare D, Philippe AM. An investigation of the origin and mobility of phosphorus in freshwater sediments from Bort-Les-Orgues Reservoir, France. J Environ Monit 1999; 1:403-7. [PMID: 11529144 DOI: 10.1039/a902269d] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to assess the origin and the potential mobility of phosphorus (P) in the sediment of the Bort-Les-Orgues Reservoir, France, two sequential extraction schemes, i.e., the SMT (modified Williams method) and the Golterman schemes, were compared. Finally, the potential mobility of P in this sediment was estimated from results of sequential extraction. The SMT method appeared to be more satisfactory than the Golterman method, which is in accordance with results from a study currently carried out in the framework of the European programme Standards, Measurements and Testing. Iron-bound P and organic P were the dominant forms of P in the sediment; these forms are likely to be released at the sediment/water interface in case of anoxia and could diffuse into the water column, thus increasing the risk of eutrophication in this sensitive reservoir. The P stock (330 +/- 66 t) is not negligible and should be taken into account in any restoration project of the reservoir. The SMT procedure seems promising and will provide, in the near future, a valuable tool for water managers in the field of lake restoration.
Collapse
Affiliation(s)
- V Ruban
- Laboratoire Central des Ponts et Chaussées, B.P. 19, 44340 Bouguenais, France
| | | | | | | |
Collapse
|