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Kamibe T, Asakura Y, Sugahara Y. Phase Transfer of Inorganic Nanosheets in a Water/2-Butanone Biphasic System and Lateral Size Fractionation via Stepwise Extractions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:820-828. [PMID: 36577084 DOI: 10.1021/acs.langmuir.2c02872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Lateral size fractionation of niobate nanosheets derived from K4Nb6O17·3H2O was achieved via phase transfer from the aqueous phase to the 2-butanone phase in a water/2-butanone biphasic system, in which tetra-n-dodecylammonium (TDDA+) bromide was used as a phase transfer reagent. Phase transfer of the nanosheets was observed when the TDDA+/[Nb6O17]4- molar ratios were 0.6 and 1.0, and the phase transfer ratios were 41 and 97%, respectively. FT-IR and thermogravimetry results showed that the extracted nanosheets contained TDDA+ ions. These results indicate that adsorption of TDDA+ likely induced an increase in the hydrophobicity of the nanosheet surface, leading to phase transfer. In the AFM image of the original nanosheets in the aqueous phase, their lateral sizes were in the range from several hundreds of nm to several tens of μm, while those of the nanosheets after phase transfer at a molar ratio of 0.6 were in the range from several hundreds of nm up to 2 μm, indicating that nanosheets with smaller lateral sizes were preferentially extracted into the 2-butanone phase. In addition, the phase transfer ratio of the fragmentated nanosheets with a much smaller lateral size distribution compared with the original nanosheets was 79% when the TDDA+/[Nb6O17]4- molar ratio was 0.6, indicating that phase transfer for the nanosheets with smaller lateral sizes proceeded efficiently. Following this extraction cycle, the nanosheets with a TDDA+/[Nb6O17]4- molar ratio of 0.6 remaining in the aqueous phase after extraction were extracted stepwise again through dilution of the aqueous phase with water and the addition of a fresh 2-butanone solution of tetra-n-dodecylammonium bromide to form a new biphasic system. The lateral sizes of the nanosheets increased as the extraction cycles were repeated. Completion of the three extraction cycles allowed formation of the three classes of the nanosheets with different lateral size ranges of 0.68 ± 0.5, 2.8 ± 1.9, and 6.6 ± 3.1 μm.
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Affiliation(s)
- Takuma Kamibe
- Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okuebo, Shinjuku-ku, Tokyo169-8555, Japan
| | - Yusuke Asakura
- Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku-ku, Tokyo169-0051, Japan
| | - Yoshiyuki Sugahara
- Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okuebo, Shinjuku-ku, Tokyo169-8555, Japan
- Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku-ku, Tokyo169-0051, Japan
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2
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Dronova M, Lécolier E, Barré L, Michot LJ. Phase diagram, structure and rheology of boehmite dispersions: role of electrostatic interactions. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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3
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Shoaib M, Molaei N, Bobicki ER. Physical aging in aqueous nematic gels of a swelling nanoclay: sol (phase) to gel (state) transition. Phys Chem Chem Phys 2021; 24:4703-4714. [PMID: 34724011 DOI: 10.1039/d1cp03399a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aqueous dispersions of geometrically anisometric, nano-sized sodium-montmorillonite (Na-Mt) display a sol-gel transition at very low solids concentrations. The microstructure of the gel formed at very low ionic strengths is considered electrostatically repulsive with a nematic character, and the gel state at ionic strengths where Debye length is of the order of particle size is conjectured to be free of physical aging. We investigated the nature of osmotically prepared Na-Mt dispersions at low ionic strength (∼10-5 M), below and above the gel point. The sol phase exhibited very low yield stress compared to the gel state, without any sign of physical aging, thus behaving as an equilibrium state. In contrast, the gel exhibited signatures of physical aging, that is, an evolving microstructure that consolidated with time when left undisturbed thus behaving as out of equilibrium state. The physical aging behaviour became more pronounced at Na-Mt concentrations far above the gel point. A critical shear rate existed, below which no stable flows were possible in the gel state representing the microstructural reorganization timescale. Overall, Na-Mt dispersions in the gel state behave like systems that were out of equilibrium with an ever-evolving microstructure, in opposition to the assumption that low ionic strength Na-Mt gels are in an equilibrium phase. The possible origin of physical aging, such as the reversible orientation of Brownian anisotropic particles, stiffening of an existing microstructure, or reorganization of microstructure towards minimal energy configuration is discussed in detail.
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Affiliation(s)
- Mohammad Shoaib
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Canada Ontario, M5S 3E5, Canada.
| | - Nahid Molaei
- Department of Materials Science and Engineering, University of Toronto, Canada Ontario, M5S 3E5, Canada
| | - Erin R Bobicki
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Canada Ontario, M5S 3E5, Canada.
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Paineau E, Rouzière S, Monet G, Diogo CC, Morfin I, Launois P. Role of initial precursors on the liquid-crystalline phase behavior of synthetic aluminogermanate imogolite nanotubes. J Colloid Interface Sci 2020; 580:275-285. [DOI: 10.1016/j.jcis.2020.07.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 11/16/2022]
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Abstract
We introduce and shortly summarize a variety of more recent aspects of lyotropic liquid crystals (LLCs), which have drawn the attention of the liquid crystal and soft matter community and have recently led to an increasing number of groups studying this fascinating class of materials, alongside their normal activities in thermotopic LCs. The diversity of topics ranges from amphiphilic to inorganic liquid crystals, clays and biological liquid crystals, such as viruses, cellulose or DNA, to strongly anisotropic materials such as nanotubes, nanowires or graphene oxide dispersed in isotropic solvents. We conclude our admittedly somewhat subjective overview with materials exhibiting some fascinating properties, such as chromonics, ferroelectric lyotropics and active liquid crystals and living lyotropics, before we point out some possible and emerging applications of a class of materials that has long been standing in the shadow of the well-known applications of thermotropic liquid crystals, namely displays and electro-optic devices.
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Abstract
This paper reviews synthetic concepts for the functionalization of various inorganic nanoparticles with a shell consisting of organic polymers and possible applications of the resulting hybrid materials. A polymer coating can make inorganic nanoparticles soluble in many solvents as individual particles and not only do low molar mass solvents become suitable, but also polymers as a solid matrix. In the case of shape anisotropic particles (e.g., rods) a spontaneous self-organization (parallel orientation) of the nanoparticles can be achieved, because of the formation of lyotropic liquid crystalline phases. They offer the possibility to orient the shape of anisotropic nanoparticles macroscopically in external electric fields. At least, such hybrid materials allow semiconducting inorganic nanoparticles to be dispersed in functional polymer matrices, like films of semiconducting polymers. Thereby, the inorganic nanoparticles can be electrically connected and addressed by the polymer matrix. This allows LEDs to be prepared with highly fluorescent inorganic nanoparticles (quantum dots) as chromophores. Recent works have aimed to further improve these fascinating light emitting materials.
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Paineau E, Monet G, Peyre V, Goldmann C, Rouzière S, Launois P. Colloidal Stability of Imogolite Nanotube Dispersions: A Phase Diagram Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12451-12459. [PMID: 31475826 DOI: 10.1021/acs.langmuir.9b01922] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this article, we revisit the colloidal stability of clay imogolite nanotubes by studying the effect of electrostatic interactions on geo-inspired synthetic nanotubes in aqueous dispersions. The nanotubes in question are double-walled aluminogermanate imogolite nanotubes (Ge-DWINTs) with a well-defined diameter (4.3 nm) and with an aspect ratio around 4. Surface charge properties are assessed by electrophoretic measurements, revealing that the outer surfaces of Ge-DWINT are positively charged up to high pH values. A series of Ge-DWINT dispersions have been prepared by osmotic stress to control both the ionic strength of the dispersion and the volume fraction in nanotubes. Optical observations coupled to small and wide-angle X-ray scattering (SAXS/WAXS) experiments allow us to unravel different nanotube organizations. At low ionic strength (IS < 10-2 mol L-1), Ge-DWINTs are fully dispersed in water while they form an arrested gel phase above a given concentration threshold, which shifts toward higher volume fraction with increasing ionic strength. The swelling law, derived from the evolution of the mean intertube distance as a function of the nanotube concentration, evidences a transition from isotropic swelling at low volume fractions to one-dimensional swelling at higher volume fractions. These results show that the colloidal stability of Ge-DWINT is driven by repulsive interactions for ionic strengths lower than 10-2 mol L-1. By contrast, higher salt concentrations lead to attractive interactions that destabilize the colloid suspension, inducing nanotube coagulation into larger structures that settle over time or form opaque gels. Detailed simulations of the WAXS diagram reveal that aggregates are mainly formed by an isotropic distribution of small bundles (less than four nanotubes) in which the nanotubes organized themselves in parallel orientation. Altogether, these measurements allow us to give the first overview of the phase diagram of colloidal dispersions based on geo-inspired imogolite-like nanotubes.
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Affiliation(s)
- Erwan Paineau
- Laboratoire de Physique des Solides, UMR CNRS 8502, Univ. Paris-Sud, Université Paris-Saclay , Bâtiment 510 , 91405 Orsay , France
| | - Geoffrey Monet
- Laboratoire de Physique des Solides, UMR CNRS 8502, Univ. Paris-Sud, Université Paris-Saclay , Bâtiment 510 , 91405 Orsay , France
| | - Véronique Peyre
- PHENIX, UMR CNRS 8234, Sorbonne Universités, UPMC , Univ. Paris 06 , 75005 Paris , France
| | - Claire Goldmann
- Laboratoire de Physique des Solides, UMR CNRS 8502, Univ. Paris-Sud, Université Paris-Saclay , Bâtiment 510 , 91405 Orsay , France
| | - Stéphan Rouzière
- Laboratoire de Physique des Solides, UMR CNRS 8502, Univ. Paris-Sud, Université Paris-Saclay , Bâtiment 510 , 91405 Orsay , France
| | - Pascale Launois
- Laboratoire de Physique des Solides, UMR CNRS 8502, Univ. Paris-Sud, Université Paris-Saclay , Bâtiment 510 , 91405 Orsay , France
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Sonin AS, Churochkina NA, Kaznacheev AV, Golovanov AV. Liquid Crystals of Clay Dispersions. COLLOID JOURNAL 2019. [DOI: 10.1134/s1061933x18060170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ye S, Yang Z, Xu J, Shang Z, Xie J. Clay-graphene oxide liquid crystals and their aerogels: synthesis, characterization and properties. ROYAL SOCIETY OPEN SCIENCE 2019; 6:181439. [PMID: 30891272 PMCID: PMC6408417 DOI: 10.1098/rsos.181439] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 01/14/2019] [Indexed: 06/09/2023]
Abstract
The dispersions containing two kinds of layered solids-graphene oxide (GO) and exfoliated montmorillonite (MMT) were mainly prepared, following which the binary aerogels were synthesized. The results indicate that the formation of liquid crystals (LCs) occurs at lower GO concentration and the birefringence becomes stronger when MMT is introduced into GO dispersion. Sol-gel transition forms in the binary suspensions with different mass fractions of MMT and GO. LCs with highly ordered alignment are observed in the gel and the fraction of LCs obviously increases with the increase in GO concentration. Moreover, the birefringence is observed in MMT-GO binary aerogels with the interconnected three-dimensional porous network, which is attributed to the ordered arrangement of MMT and GO nanosheets in pore walls. Among the aerogels with different MMT/GO ratios, the samples at the ratio of 10 : 1 show better adsorption capacity and removal percentage of cationic and anionic dyes.
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Xu P, Lan Y, Dai L, O’Neill T, Stoev I, Cao T, Eiser E. Discotic liquid crystals of cucurbit[7]uril (CB[7])-functionalised Laponite clays. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1508778] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Peicheng Xu
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Yang Lan
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
- Chemistry Department, University of Cambridge, Cambridge, UK
| | - Linjie Dai
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Thomas O’Neill
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Iliya Stoev
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Tianyang Cao
- Chemistry Department, Tsinghua University, Beijing, People's Republic of China
| | - Erika Eiser
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
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11
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Xu P, Lan Y, Xing Z, Eiser E. Liquid crystalline behaviour of self-assembled LAPONITE®/PLL-PEG nanocomposites. SOFT MATTER 2018; 14:2782-2788. [PMID: 29457811 DOI: 10.1039/c7sm01613a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Synthetic LAPONITE®-clay particles with platelet-like shape display strong aging when dispersed in aqueous solutions, preventing the latter from reaching their natural liquid-crystalline equilibrium state. Here we introduce a facile method that successfully prevents this aging behaviour and enables accessing the systems' liquid-crystal and crystalline phases. We graft the comb-like polymer PLL-PEG (poly(l-lysine)-g-poly(ethylene glycol)) onto the clay surfaces from solution, thereby screening the negative surface charges and thus ensuring steric stabilisation. We show zeta-sizer and rheology measurements, respectively, confirming complete steric coating and that aging of dilute samples is completely suppressed even after a year. Using evaporation as a means to concentrate the particles, we observe various liquid crystalline textures under a polarized optical microscope (POM). Upon sequential spreading and drying, we are also able to obtain transparent films with hierarchical architecture.
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Affiliation(s)
- P Xu
- University of Cambridge, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK.
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12
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Song Y, Iyi N, Hoshide T, Ozawa TC, Ebina Y, Ma R, Yamamoto S, Miyamoto N, Sasaki T. Massive hydration-driven swelling of layered perovskite niobate crystals in aqueous solutions of organo-ammonium bases. Dalton Trans 2018; 47:3022-3028. [DOI: 10.1039/c7dt03413j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A systematic understanding on the osmotic swelling of layered niobate crystals using various amines is reported.
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Affiliation(s)
- Yeji Song
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba
- Japan
- Materials Science and Engineering
| | - Nobuo Iyi
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba
- Japan
| | - Tatsumasa Hoshide
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba
- Japan
| | - Tadashi C. Ozawa
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba
- Japan
| | - Yasuo Ebina
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba
- Japan
| | - Renzhi Ma
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba
- Japan
| | - Shinya Yamamoto
- Department of Life
- Environment and Materials Science
- Fukuoka Institute of Technology
- Fukuoka 811-0295
- Japan
| | - Nobuyoshi Miyamoto
- Department of Life
- Environment and Materials Science
- Fukuoka Institute of Technology
- Fukuoka 811-0295
- Japan
| | - Takayoshi Sasaki
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba
- Japan
- Materials Science and Engineering
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Gruhn T, Pogorelov E, Seiferling F, Emmerich H. Analyzing spinodal decomposition of an anisotropic fluid mixture. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:055103. [PMID: 27941222 DOI: 10.1088/1361-648x/aa4de0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Spinodal decomposition leads to spontaneous fluctuations of the local concentration. In the early stage, the resulting pattern provides explicit information about the material properties of the mixture. In the case of two isotropic fluids, the static structure factor shows the characteristic ring shape. If one component is a liquid crystal, the pattern is typically anisotropic and the structure factor is more complex. Using numerical methods, we investigate how structure factors can be used to extract information about material properties like the diffusion constant or the isotropic and the anisotropic contributions to the interfacial tension. The method is based on momenta taken from structure factors in the early stage of the spinodal demixing. We perform phase field calculations for an isotropic and an anisotropic spinodal decomposition. A comparison of the extracted results with analytic values is made. The calculations show that linear modes dominate in the beginning of the growth process, while non-linear modes grow monotonously in the region of the k-space for which damping is predicted by the linearized theory. As long as non-linear modes are small enough, linearized theory can be applied to extract material properties from the structure factor.
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Affiliation(s)
- Thomas Gruhn
- Materials and Process Simulation (MPS), University of Bayreuth, Germany
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14
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Ballah J, Chamerois M, Durand-Vidal S, Malikova N, Levitz P, Michot L. Effect of chemical and geometrical parameters influencing the wettability of smectite clay films. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.10.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Rosenfeldt S, Stöter M, Schlenk M, Martin T, Albuquerque RQ, Förster S, Breu J. In-Depth Insights into the Key Steps of Delamination of Charged 2D Nanomaterials. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10582-10588. [PMID: 27648496 DOI: 10.1021/acs.langmuir.6b02206] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Delamination is a key step to obtain individual layers from inorganic layered materials needed for fundamental studies and applications. For layered van der Waals materials such as graphene, the adhesion forces are small, allowing for mechanical exfoliation, whereas for ionic layered materials such as layered silicates, the energy to separate adjacent layers is considerably higher. Quite counterintuitively, we show for a synthetic layered silicate (Na0.5-hectorite) that a scalable and quantitative delamination by simple hydration is possible for high and homogeneous charge density, even for aspect ratios as large as 20000. A general requirement is the separation of adjacent layers by solvation to a distance where layer interactions become repulsive (Gouy-Chapman length). Further hydration up to 34 nm leads to the formation of a highly ordered lamellar liquid crystalline phase (Wigner crystal). Up to eight higher-order reflections indicate excellent positional order of individual layers. The Wigner crystal melts when the interlayer separation reaches the Debye length, where electrostatic interactions between adjacent layers are screened. The layers become weakly charge-correlated. This is indicated by fulfilling the classical Hansen-Verlet and Lindeman criteria for melting. We provide insight into the requirements for layer separation and controlling the layer distances for a broad range of materials and outline an important pathway for the integration of layers into devices for advanced applications.
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Affiliation(s)
| | | | | | | | - Rodrigo Queiroz Albuquerque
- São Carlos Institute of Chemistry, University of São Paulo , Av. Trab. Sao-carlense 400, 13560-970 São Carlos, Brazil
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Parrello D, Zegeye A, Mustin C, Billard P. Siderophore-Mediated Iron Dissolution from Nontronites Is Controlled by Mineral Cristallochemistry. Front Microbiol 2016; 7:423. [PMID: 27064911 PMCID: PMC4814481 DOI: 10.3389/fmicb.2016.00423] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 03/16/2016] [Indexed: 11/22/2022] Open
Abstract
Bacteria living in oxic environments experience iron deficiency due to limited solubility and slow dissolution kinetics of iron-bearing minerals. To cope with iron deprivation, aerobic bacteria have evolved various strategies, including release of siderophores or other organic acids that scavenge external Fe(III) and deliver it to the cells. This research investigated the role of siderophores produced by Pseudomonas aeruginosa in the acquisition of Fe(III) from two iron-bearing colloidal nontronites (NAu-1 and NAu-2), comparing differences in bioavailability related with site occupancy and distribution of Fe(III) in the two lattices. To avoid both the direct contact of the mineral colloids with the bacterial cells and the uncontrolled particle aggregation, nontronite suspensions were homogenously dispersed in a porous silica gel before the dissolution experiments. A multiparametric approach coupling UV-vis spectroscopy and spectral decomposition algorithm was implemented to monitor simultaneously the solubilisation of Fe and the production of pyoverdine in microplate-based batch experiments. Both nontronites released Fe in a particle concentration-dependent manner when incubated with the wild-type P. aeruginosa strain, however iron released from NAu-2 was substantially greater than from NAu-1. The profile of organic acids produced in both cases was similar and may not account for the difference in the iron dissolution efficiency. In contrast, a pyoverdine-deficient mutant was unable to mobilize Fe(III) from either nontronite, whereas iron dissolution occurred in abiotic experiments conducted with purified pyoverdine. Overall, our data provide evidence that P. aeruginosa indirectly mobilize Fe from nontronites primarily through the production of pyoverdine. The structural Fe present on the edges of NAu-2 rather than NAu-1 particles appears to be more bio-accessible, indicating that the distribution of Fe, in the tetrahedron and/or in the octahedron sites, governs the solubilisation process. Furthermore, we also revealed that P. aeruginosa could acquire iron when in direct contact with mineral particles in a siderophore-independent manner.
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Affiliation(s)
- Damien Parrello
- Laboratoire Interdisciplinaire des Environnements Continentaux, UMR 7360 Centre National de la Recherche Scientifique - Université de LorraineVandœuvre-lès-Nancy, France; Civil and Environmental Engineering, University of MissouriColumbia, MO, USA
| | - Asfaw Zegeye
- Laboratoire Interdisciplinaire des Environnements Continentaux, UMR 7360 Centre National de la Recherche Scientifique - Université de Lorraine Vandœuvre-lès-Nancy, France
| | - Christian Mustin
- Laboratoire Interdisciplinaire des Environnements Continentaux, UMR 7360 Centre National de la Recherche Scientifique - Université de Lorraine Vandœuvre-lès-Nancy, France
| | - Patrick Billard
- Laboratoire Interdisciplinaire des Environnements Continentaux, UMR 7360 Centre National de la Recherche Scientifique - Université de Lorraine Vandœuvre-lès-Nancy, France
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MIYAMOTO N, YAMAMOTO S. Inorganic Nanosheet Liquid Crystals: Self-Assembled Structures in Dispersions of Two-Dimensional Inorganic Polymers. KOBUNSHI RONBUNSHU 2016. [DOI: 10.1295/koron.2015-0075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nobuyoshi MIYAMOTO
- Department of Life, Environment, and Materials Science, Fukuoka Institute of Technology
- Faculty of Engineering, Graduate School of Fukuoka Institute of Technology
- Institute for Materials Chemistry and Engineering, Kyushu University
| | - Shinya YAMAMOTO
- Faculty of Engineering, Graduate School of Fukuoka Institute of Technology
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Woolston P, van Duijneveldt JS. Three-Phase Coexistence in Colloidal Rod-Plate Mixtures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:9290-9295. [PMID: 26262770 DOI: 10.1021/acs.langmuir.5b02224] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Aqueous suspensions of clay particles, such as montmorillonite (MMT) platelets and sepiolite (Sep) rods, tend to form gels at concentrations around 1 vol %. For Sep rods, adsorbing sodium polyacrylate to the surface allows for an isotropic-nematic phase separation to be seen instead. Here, MMT is added to such Sep suspensions, resulting in a complex phase behavior. Across a range of clay concentrations, separation into three phases is observed: a lower, nematic phase dominated by Sep rods, a MMT-rich middle layer, which is weakly birefringent and probably a gel, and a dilute top phase. Analysis of phase volumes suggests that the middle layer may contain as much as 6 vol % MMT.
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Affiliation(s)
- Phillip Woolston
- School of Chemistry, University of Bristol , Cantock's Close, Bristol BS8 1TS, United Kingdom
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Isotropic–nematic phase transition in aqueous sepiolite suspensions. J Colloid Interface Sci 2015; 437:65-70. [DOI: 10.1016/j.jcis.2014.09.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 08/14/2014] [Accepted: 09/01/2014] [Indexed: 11/23/2022]
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Abrahamsson C, Nordstierna L, Nordin M, Dvinskikh SV, Nydén M. Magnetic orientation of nontronite clay in aqueous dispersions and its effect on water diffusion. J Colloid Interface Sci 2015; 437:205-210. [PMID: 25313485 DOI: 10.1016/j.jcis.2014.09.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 09/12/2014] [Accepted: 09/15/2014] [Indexed: 10/24/2022]
Abstract
The diffusion rate of water in dilute clay dispersions depends on particle concentration, size, shape, aggregation and water-particle interactions. As nontronite clay particles magnetically align parallel to the magnetic field, directional self-diffusion anisotropy can be created within such dispersion. Here we study water diffusion in exfoliated nontronite clay dispersions by diffusion NMR and time-dependant 1H-NMR-imaging profiles. The dispersion clay concentration was varied between 0.3 and 0.7 vol%. After magnetic alignment of the clay particles in these dispersions a maximum difference of 20% was measured between the parallel and perpendicular self-diffusion coefficients in the dispersion with 0.7 vol% clay. A method was developed to measure water diffusion within the dispersion in the absence of a magnetic field (random clay orientation) as this is not possible with standard diffusion NMR. However, no significant difference in self-diffusion coefficient between random and aligned dispersions could be observed.
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Affiliation(s)
- Christoffer Abrahamsson
- Applied Surface Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96 Gothenburg, Sweden; SuMo Biomaterials, VINN Excellence Centre, Chalmers University of Technology, 412 96 Gothenburg, Sweden.
| | - Lars Nordstierna
- Applied Surface Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96 Gothenburg, Sweden
| | - Matias Nordin
- German Cancer Research Center, Medical Physics in Radiology, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Sergey V Dvinskikh
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44 Stockholm, Sweden; Laboratory of Biomolecular NMR, St. Petersburg State University, St. Petersburg 199034, Russia
| | - Magnus Nydén
- Ian Wark Research Institute, University of South Australia, Mawson Lakes Campus, Mawson Lakes, SA 5095, Australia
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21
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Oulkadi D, Banon S, Mustin C, Etienne M. Local pH measurement at wet mineral-bacteria/air interface. Electrochem commun 2014. [DOI: 10.1016/j.elecom.2014.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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22
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Abrahamsson C, Nordstierna L, Bergenholtz J, Altskär A, Nydén M. Magnetically induced structural anisotropy in binary colloidal gels and its effect on diffusion and pressure driven permeability. SOFT MATTER 2014; 10:4403-4412. [PMID: 24803339 DOI: 10.1039/c4sm00315b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the synthesis, microstructure and mass transport properties of a colloidal hydrogel self-assembled from a mixture of colloidal silica and nontronite clay plates at different particle concentrations. The gel-structure had uniaxial long-range anisotropy caused by alignment of the clay particles in a strong external magnetic field. After gelation the colloidal silica covered the clay particle network, fixing the orientation of the clay plates. Comparing gels with a clay concentration between 0 and 0.7 vol%, the magnetically oriented gels had a maximum water permeability and self-diffusion coefficient at 0.3 and 0.7 vol% clay, respectively. Hence the specific clay concentration resulting in the highest liquid flux was pressure dependent. This study gives new insight into the effect of anisotropy, particle concentration and bound water on mass transport properties in nano/microporous materials. Such findings merit consideration when designing porous composite materials for use in for example fuel cell, chromatography and membrane technology.
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Affiliation(s)
- Christoffer Abrahamsson
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96, Gothenburg, Sweden.
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23
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Ebrahimi D, Whittle AJ, Pellenq RJM. Mesoscale properties of clay aggregates from potential of mean force representation of interactions between nanoplatelets. J Chem Phys 2014. [DOI: 10.1063/1.4870932] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Oulkadi D, Balland-Bolou-Bi C, Billard P, Kitzinger G, Parrello D, Mustin C, Banon S. Interactions of three soil bacteria species with phyllosilicate surfaces in hybrid silica gels. FEMS Microbiol Lett 2014; 354:37-45. [DOI: 10.1111/1574-6968.12421] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 03/02/2014] [Accepted: 03/10/2014] [Indexed: 12/01/2022] Open
Affiliation(s)
- Djihad Oulkadi
- Université de Lorraine; LIEC; UMR CNRS 7360; Vandoeuvre-lès-Nancy France
| | - Clarisse Balland-Bolou-Bi
- Faculté des Sciences et Technologies; Université Paris Est Créteil; UMR BIOEMCO Équipe IBIOS; Créteil France
| | - Patrick Billard
- Université de Lorraine; LIEC; UMR CNRS 7360; Vandoeuvre-lès-Nancy France
| | | | - Damien Parrello
- Université de Lorraine; LIEC; UMR CNRS 7360; Vandoeuvre-lès-Nancy France
| | - Christian Mustin
- Université de Lorraine; LIEC; UMR CNRS 7360; Vandoeuvre-lès-Nancy France
| | - Sylvie Banon
- Université de Lorraine; LIEC; UMR CNRS 7360; Vandoeuvre-lès-Nancy France
- Université de Lorraine; LIBio; ENSAIA; Vandoeuvre-lès-Nancy France
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25
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Delhorme M, Jönsson B, Labbez C. Gel, glass and nematic states of plate-like particle suspensions: charge anisotropy and size effects. RSC Adv 2014. [DOI: 10.1039/c4ra05555a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The influence of the charge anisotropy and platelet size on the formation of gel and glass states and nematic phases in suspensions of plate-like particles is investigated using Monte Carlo simulations in the canonical ensemble.
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Affiliation(s)
- Maxime Delhorme
- Laboratoire Interdisciplinaire Carnot de Bourgogne
- UMR 6303 CNRS
- Université de Bourgogne
- F-21078 Dijon, France
- Theoretical Chemistry
| | - Bo Jönsson
- Theoretical Chemistry
- Lund University
- Chemical Center
- S-221 00 Lund, Sweden
| | - Christophe Labbez
- Laboratoire Interdisciplinaire Carnot de Bourgogne
- UMR 6303 CNRS
- Université de Bourgogne
- F-21078 Dijon, France
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26
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Jiang C, Huang H, Ma C, He T, Zhang F. Influence of particle size and tunable interactions on isotropic-nematic transition of block copolymer single crystal platelet suspensions. J Colloid Interface Sci 2013; 411:53-60. [PMID: 24112840 DOI: 10.1016/j.jcis.2013.08.054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 08/22/2013] [Accepted: 08/28/2013] [Indexed: 11/17/2022]
Abstract
We have studied the influence of the particle size and the tunable lateral interactions on the isotropic-nematic (I-N) phase transition of a plate-like colloidal system. The particles are single crystals of a block copolymer PS-b-PLLA (BCSC) prepared using a self-seeding procedure. These lozenge shape crystals have a uniform thickness and a narrowly distributed lateral size. The equilibrium phase behavior and I-N phase transition have been characterized using crossed polarizers at the room temperature. A nematic phase exists for all systems with size ranging from 700 to 4000 nm. For smaller crystals (<1200 nm), the I-N phase transition follows a process of slow sedimentation and subsequent macroscopic phase separation, resulting in a highly oriented nematic phase with a sharp I-N interface. For larger crystals (≥1200 nm), the I-N phase transition follows a process of nucleation and subsequent sedimentation, resulting in a random orientation of crystals in the nematic phase and a rough I-N interface. The I-N transition occurs at a very low volume fraction (<0.2%) for all systems, which is at least one order of magnitude lower than the theoretical prediction (2-7%). However, addition of a small amount of ethanol into the solution, the I-N transition can be significantly suppressed. These results demonstrate the existence of a lateral attraction between crystals, which is due to the polar attraction between the uncovered PLLA crystalline domains. Polar ethanol molecules can adsorb to the PLLA crystalline surface and screen the attraction. The attraction exhibits highly orientation-dependent. To further demonstrate this highly directional attraction, we have prepared two composite single crystal suspensions with PLLA homopolymer, which have a much wider open angle for the polar attraction. Indeed, the resulting liquid crystalline phases show much less horizontal ordering.
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Affiliation(s)
- Chunbo Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; University of Chinese Academy of Sciences, Beijing 10039, PR China.
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27
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Oulkadi D, Balland-Bolou-Bi C, Michot L, Grybos M, Billard P, Mustin C, Banon S. Bioweathering of nontronite colloids in hybrid silica gel: implications for iron mobilization. J Appl Microbiol 2013; 116:325-34. [DOI: 10.1111/jam.12361] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 09/23/2013] [Accepted: 10/01/2013] [Indexed: 11/29/2022]
Affiliation(s)
- D. Oulkadi
- Laboratoire Interdisciplinaire des Ecosystèmes Continentaux; UMR CNRS 7360; Université de Lorraine; Vandoeuvre-Les-Nancy France
| | | | - L.J. Michot
- Laboratoire Interdisciplinaire des Ecosystèmes Continentaux; UMR CNRS 7360; Université de Lorraine; Vandoeuvre-Les-Nancy France
| | - M. Grybos
- Laboratoire GRESE; Université de Limoges; Limoges Cedex France
| | - P. Billard
- Laboratoire Interdisciplinaire des Ecosystèmes Continentaux; UMR CNRS 7360; Université de Lorraine; Vandoeuvre-Les-Nancy France
| | - C. Mustin
- Laboratoire Interdisciplinaire des Ecosystèmes Continentaux; UMR CNRS 7360; Université de Lorraine; Vandoeuvre-Les-Nancy France
| | - S. Banon
- Laboratoire Interdisciplinaire des Ecosystèmes Continentaux; UMR CNRS 7360; Université de Lorraine; Vandoeuvre-Les-Nancy France
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28
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Yang X, Guo C, Ji L, Li Y, Tu Y. Liquid crystalline and shear-induced properties of an aqueous solution of graphene oxide sheets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:8103-7. [PMID: 23755877 DOI: 10.1021/la401038c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We demonstrated here the lyotropic liquid crystalline behavior of an aqueous solution of graphene oxide (GO) sheets. Scanning electron microscope experiments revealed GO sheets self-assembled into fiber-like or sheet-like structures at different concentrations under flow conditions. As a result, the solution viscosity decreased dramatically with increasing shear stress.
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Affiliation(s)
- Xiaoming Yang
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
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29
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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 : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5315-5324. [PMID: 23544905 DOI: 10.1021/la400111w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [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)).
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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.
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30
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Cui Y, Pizzey CL, van Duijneveldt JS. Modifying the structure and flow behaviour of aqueous montmorillonite suspensions with surfactant. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2013; 371:20120262. [PMID: 23459964 DOI: 10.1098/rsta.2012.0262] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Colloidal suspensions of plate-like particles undergo a variety of phase transitions. The predicted isotropic/nematic transition is often pre-empted by a sol/gel transition, especially in suspensions of the most commonly used natural swelling clay montmorillonite (MMT). A number of factors, including charge interactions, flexibility and salt concentration, may contribute to this competition. In this study, the effect of surfactant adsorption on suspensions of MMT was studied using rheology, small-angle X-ray scattering, static light scattering and optical microscopy. The addition of a polyetheramine surfactant reduced the moduli of the system and shifted the sol/gel transition to a much higher clay concentration, compared with suspensions of bare clay particles. Yet, scattering data revealed no change in suspension structure on length scales up to around a micrometre. Primary aggregates remain at this length scale and no nematic phase is formed. There is, however, a change in structure at large length scales (of order 20 μm) where light scattering indicates the presence of string-like aggregates that disappear on addition of surfactant. Microscope images of dried suspensions also revealed a string-like structure. The dried strings show strong birefringence and may consist of concentric cylinders, self-assembled from clay sheets.
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Affiliation(s)
- Yannan Cui
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK
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31
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Michot LJ, Bihannic I, Thomas F, Lartiges BS, Waldvogel Y, Caillet C, Thieme J, Funari SS, Levitz P. Coagulation of Na-montmorillonite by inorganic cations at neutral pH. A combined transmission X-ray microscopy, small angle and wide angle X-ray scattering study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:3500-3510. [PMID: 23421550 DOI: 10.1021/la400245n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The coagulation of sodium montmorillonite by inorganic salts (NaNO3, Ca(NO3)2 and La(NO3)3) was studied by combining classical turbidity measurements with wide-angle-X-ray scattering (WAXS), small-angle-X-ray scattering (SAXS), and transmission X-ray microscopy (TXM). Using size-selected samples, such a combination, associated with an original quantitative treatment of TXM images, provides a true multiscale investigation of the formed structures in a spatial range extending from a few ångstroms to a few micrometers. We then show that, at neutral pH and starting with fully Na-exchanged samples, coagulation proceeds via the formation of stacks of particles with a slight mismatch between layers. These stacks arrange themselves into larger porous anisotropic particles, the porosity of which depends on the valence of the cation used for coagulation experiments. Face-face coagulation is clearly dominant under those conditions, and no evidence for significant face-edge coagulation was found. These structures appear to arrange as larger clusters, the organization of which should control the mechanical properties of the flocs.
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Affiliation(s)
- Laurent J Michot
- Laboratoire Interdisciplinaire des Environnements Continentaux, UMR 7360 CNRS-Université de Lorraine, Vandœuvre, France.
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32
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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] [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.
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Affiliation(s)
- Erwan Paineau
- Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud, Bâtiment 510, 91405 Orsay Cedex, France.
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33
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Miyamoto N, Nakato T. Liquid Crystalline Inorganic Nanosheet Colloids Derived From Layered Materials. Isr J Chem 2012. [DOI: 10.1002/ijch.201200033] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Delhorme M, Labbez C, Jönsson B. Liquid Crystal Phases in Suspensions of Charged Plate-Like Particles. J Phys Chem Lett 2012; 3:1315-20. [PMID: 26286776 DOI: 10.1021/jz300380n] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Anisotropic interactions in colloidal suspensions have recently emerged as a route for the design of new soft materials. Nonisotropic particles can form nematic, smectic, hexatic, and columnar liquid crystals. Although the formation of these phases is well rationalized when excluded volume is solely at play, the role of electrostatic interactions still remains unclear and even less so when particles present a charge heterogeneity, for example, clays. Here, we use Monte Carlo simulations of concentrated suspensions of charged disk-like particles to reveal the role of Coulomb interactions and charge anisotropy underlying liquid crystal formation and structures. We observe a vast zoo of exotic structures, going from hexatic to columnar phases, which are shown to be controlled by the charge anisotropy. The particle volume fraction at which these phases start to form is found to decrease with increasing Coulomb interactions and charge anisotropy, which suggests a route to tune the structure of aqueous liquid crystals.
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Affiliation(s)
- Maxime Delhorme
- †Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS, Université de Bourgogne, 21078 Dijon Cedex, France
| | - Christophe Labbez
- †Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS, Université de Bourgogne, 21078 Dijon Cedex, France
| | - Bo Jönsson
- ‡Department of Theoretical Chemistry, Chemical Center, POB 124, S-221 00 Lund, Sweden
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35
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Yamaguchi D, Miyamoto N, Fujita T, Nakato T, Koizumi S, Ohta N, Yagi N, Hashimoto T. Aspect-ratio-dependent phase transitions and concentration fluctuations in aqueous colloidal dispersions of charged platelike particles. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 85:011403. [PMID: 22400569 DOI: 10.1103/physreve.85.011403] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 09/14/2011] [Indexed: 05/22/2023]
Abstract
Phase transitions of aqueous colloidal dispersions of charged platelike particles of niobate nanosheets were investigated as a function of the aspect ratio (r(asp)) and particle volume concentration (φ(p)) by means of small-angle neutron scattering and small-angle x-ray scattering. The results elucidated the following three pieces of evidence: (1) the macroscopic phase separation of the dispersions into an isotropic phase and a liquid crystalline (LC) phase under the conditions of (a) varying r(asp) (1.3×10(-4) ≤ r(asp) ≤ 2.5×10(-3)) at a constant φ(p) = 0.01 and (b) varying φ(p) (0.01 ≤ φ(p) ≤ 0.025) at a constant r(asp) = 2.5×10(-3), a mechanism of which is proposed in the text, where r(asp) ≡ d/ ̅L, with d and ̅L being thickness and the average lateral size of the plates, respectively; (2) the r(asp)-induced phase transition of the LC phase from a nematic phase to a highly periodic layered phase, the line shapes of the scattering peaks of which were examined by Caillé's analysis, upon increasing r(asp) under the condition (a); (3) the LC phase having remarkable concentration fluctuations of the particles which are totally unexpected for the conventional lyotropic molecular LC but which are anticipated to be general for the platelike colloidal particles.
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Affiliation(s)
- Daisuke Yamaguchi
- Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki 319-1195, Japan
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36
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Tertre E, Ferrage E, Bihannic I, Michot L, Prêt D. Influence of the ionic strength and solid/solution ratio on Ca(II)-for-Na+ exchange on montmorillonite. Part 2: Understanding the effect of the m/V ratio. Implications for pore water composition and element transport in natural media. J Colloid Interface Sci 2011; 363:334-47. [DOI: 10.1016/j.jcis.2011.07.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 06/29/2011] [Accepted: 07/01/2011] [Indexed: 10/17/2022]
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37
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Miyamoto N, Yamamoto S, Shimasaki K, Harada K, Yamauchi Y. Exfoliated Nanosheets of Layered Perovskite KCa2Nb3O10 as an Inorganic Liquid Crystal. Chem Asian J 2011; 6:2936-9. [DOI: 10.1002/asia.201100279] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Indexed: 11/10/2022]
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38
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Bio-dissolution of colloidal-size clay minerals entrapped in microporous silica gels. J Colloid Interface Sci 2011; 362:317-24. [PMID: 21807370 DOI: 10.1016/j.jcis.2011.07.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 06/27/2011] [Accepted: 07/09/2011] [Indexed: 11/22/2022]
Abstract
Four colloidal-size fractions of strongly anisotropic particles of nontronite (NAu-2) having different ratios of basal to edge surfaces were incubated in the presence of heterotrophic soil bacteria to evaluate how changes in mineral surface reactivity influence microbial dissolution rate of minerals. To avoid any particle aggregation, which could change the reactive surface area available for dissolution, NAu-2 particles were immobilized in a biocompatible TEOS-derived silica matrix. The resulting hybrid silica gels support bacterial growth with NAu-2 as the sole source of Fe and Mg. Upon incubation of the hybrid material with bacteria, between 0.3% and 7.5% of the total Fe included in the mineral lattice was released with a concomitant pH decrease. For a given pH value, the amount of released Fe varied between strains and was two to twelve-fold higher than under abiotic conditions. This indicates that complexing agents produced by bacteria play an important role in the dissolution process. However, in contrast with proton-promoted NAu-2 dissolution (abiotic incubations) that was negatively correlated with particle size, bacterial-enhanced dissolution was constant for all size fractions used. We conclude that bio-dissolution of nontronite particles under acidic conditions seems to be controlled by bacterial metabolism rather than by the surface reactivity of mineral.
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39
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Paineau E, Michot LJ, Bihannic I, Baravian C. Aqueous suspensions of natural swelling clay minerals. 2. Rheological characterization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:7806-7819. [PMID: 21591697 DOI: 10.1021/la2001267] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report in this article a comprehensive investigation of the viscoelastic behavior of different natural colloidal clay minerals in aqueous solution. Rheological experiments were carried out under both dynamic and steady-state conditions, allowing us to derive the elasticity and yield stress. Both parameters can be renormalized for all sizes, ionic strength, and type of clay using in a first approach only the volume of the particles. However, applying such a treatment to various clays of similar shapes and sizes yields differences that can be linked to the repulsion strength and charge location in the swelling clays. The stronger the repulsive interactions, the better the orientation of clay particles in flows. In addition, a master linear relationship between the elasticity and yield stress whose value corresponds to a critical deformation of 0.1 was evidenced. Such a relationship may be general for any colloidal suspension of anisometric particles as revealed by the analysis of various experimental data obtained on either disk-shaped or lath- and rod-shaped particles. The particle size dependence of the sol-gel transition was also investigated in detail. To understand why suspensions of larger particles gel at a higher volume fraction, we propose a very simplified view based on the statistical hydrodynamic trapping of a particle by an another one in its neighborhood upon translation and during a short period of time. We show that the key parameter describing this hydrodynamic trapping varies as the cube of the average diameter and captures most features of the sol-gel transition. Finally, we pointed out that in the high shear limit the suspension viscosity is still closely related to electrostatic interactions and follows the same trends as the viscoelastic properties.
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Affiliation(s)
- Erwan Paineau
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL, UMR 7569, BP40 54501 Vandœuvre, Cedex France.
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40
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Dozov I, Paineau E, Davidson P, Antonova K, Baravian C, Bihannic I, Michot LJ. Electric-Field-Induced Perfect Anti-Nematic Order in Isotropic Aqueous Suspensions of a Natural Beidellite Clay. J Phys Chem B 2011; 115:7751-65. [DOI: 10.1021/jp201201x] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- I. Dozov
- Laboratoire de Physique des Solides, UMR 8502 CNRS−Université Paris-Sud, Bât. 510, 91405 Orsay Cedex, France
| | - E. Paineau
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40, 54501 Vandœuvre Cedex, France
| | - P. Davidson
- Laboratoire de Physique des Solides, UMR 8502 CNRS−Université Paris-Sud, Bât. 510, 91405 Orsay Cedex, France
| | - K. Antonova
- Institute of Solid State Physics, Bulgarian Academy of Sciences, Tzarigradsko Chaussee 72, 1784 Sofia, Bulgaria
| | - C. Baravian
- Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France
| | - I. Bihannic
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40, 54501 Vandœuvre Cedex, France
| | - L. J. Michot
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40, 54501 Vandœuvre Cedex, France
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41
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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. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 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] [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.
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Affiliation(s)
- A M Philippe
- Laboratoire d'Energétique et de Mécanique Théorique et Appliquée, Nancy University-CNRS, UMR 7563, Vandœuvre Lès Nancy, France.
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42
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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 : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:5562-5573. [PMID: 21476528 DOI: 10.1021/la2001255] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [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.
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Affiliation(s)
- Erwan Paineau
- Laboratoire Environnement et Minéralurgie, Nancy Université-CNRS, UMR 7569, BP40 54501 Vandœuvre Cedex, France.
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43
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Jiang C, Wang Z, Huang H, He T. Large-scale and highly oriented liquid crystal phase in suspensions of polystyrene-block-poly(L-lactide) single crystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:4351-4357. [PMID: 21405072 DOI: 10.1021/la200314t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A large number of lozenge-shaped and sandwiched polystyrene-block-poly(L-lactide) (PS-b-PLLA) single crystals were prepared by the self-seeding technique. The single crystals were nearly monodispersed in both thickness and diameter. They are well-dispersed because of the steric stabilization offered by tethered PS in p-xylene, which is a good solvent for PS. The suspensions were observed to separate into a transparent upper phase and a turbid lower phase. The lower phase showed uniform iridescent stripes extending over the whole tube between crossed polarizers. The birefringence demonstrates the liquid crystal order, and the uniform stripes reveal that the phase is a well-oriented single domain. The phase-transition concentration is rather low. Polarizing light microscopy (PLM) images show Schlieren texture and thread-like texture. Small-angle X-ray scattering (SAXS) results showed that the single crystals in the liquid crystal phase oriented horizontally with a vertical repeat distance of about 70 nm. Additionally, the possible structure of the liquid crystal phase is being discussed. The novel disclike colloidal particle might be useful for anisotropic photonic materials.
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Affiliation(s)
- Chunbo Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
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44
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Tertre E, Prêt D, Ferrage E. Influence of the ionic strength and solid/solution ratio on Ca(II)-for-Na+ exchange on montmorillonite. Part 1: Chemical measurements, thermodynamic modeling and potential implications for trace elements geochemistry. J Colloid Interface Sci 2011; 353:248-56. [DOI: 10.1016/j.jcis.2010.09.039] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Revised: 08/20/2010] [Accepted: 09/14/2010] [Indexed: 11/26/2022]
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45
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Porion P, Faugère AM, Michot LJ, Paineau E, Delville A. Orientational microdynamics and magnetic-field-induced ordering of clay platelets detected by 2H NMR spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7035-7044. [PMID: 20047274 DOI: 10.1021/la904298d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The orientation of montmorillonite clays induced by a static magnetic field is quantified by using (2)H NMR spectroscopy. Indeed, the residual quadrupolar splitting of the (2)H resonance line measured for heavy water is a direct consequence of the specific orientation of the clay platelets in the static magnetic field. In the dilute regime, this residual splitting increases linearly with clay concentration, which confirms that the clay/clay electrostatic repulsions remain negligible by comparison with the diamagnetic coupling of these anisotropic platelets. At higher concentration, the electrostatic repulsion between clay particles markedly enhances the detected splitting. Such enhancement is well predicted by numerical simulations. By varying the size of the clay platelets and the strength of the static magnetic field, it is possible to evaluate the order of magnitude of the diamagnetic susceptibility of these anisotropic colloids.
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Affiliation(s)
- Patrice Porion
- Centre de Recherche sur la Matière Divisée, CNRS-Université d'Orléans, UMR6619, 45071 Orléans Cedex 02, France.
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46
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Miyamoto N, Iijima H, Ohkubo H, Yamauchi Y. Liquid crystal phases in the aqueous colloids of size-controlled fluorinated layered clay mineral nanosheets. Chem Commun (Camb) 2010; 46:4166-8. [PMID: 20454743 DOI: 10.1039/b927335b] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Size-controlled nanosheet colloids of fluorohectorite and fluortetrasilicic mica were prepared in high yield and their transitions to fluid liquid crystal (LC) phases with highly ordered lamellar structures were identified over a wide concentration range, which is a rare case for clay mineral systems.
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Affiliation(s)
- Nobuyoshi Miyamoto
- Department of Life, Environment and Materials Science, Fukuoka Institute of Technology, 3-30-1 Wajiro-Higashi, Higashi-ku, Fukuoka 811-0295, Japan.
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47
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Ringdal NI, Fonseca DM, Hansen EL, Hemmen H, Fossum JO. Nematic textures in colloidal dispersions of Na-fluorohectorite synthetic clay. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 81:041702. [PMID: 20481735 DOI: 10.1103/physreve.81.041702] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Indexed: 05/22/2023]
Abstract
We have studied stable strata of gravity-induced phase separation in suspensions of synthetic Na-fluorohectorite clay in saline solutions. We have observed how the strata depend on clay concentration as well as on salt content. The mass distribution and density variation at the isotropic-nematic interface indicate that existing models and assumptions in existing simulations are able to relatively well account for the observed behavior. We suggest that discrepancies could be due to the high polydispersity and the irregular shape of our Na-fluorohectorite particles, as well as diffusive double-layer effects, which could result in a competition between nematic ordering and gelation. The dependence on ionic strength displays three main regimes irrespective of clay concentration. At low ionic strength (approximately 0.1-5 mM NaCl), the Debye screening length is longer than the van der Waals force range. In this regime, the particles repel each other electrostatically and entropy-driven Onsager-type nematic ordering may occur, although gelation effects could also play a role. For ionic strengths above about 5 mM, we believe that the van der Waals force comes into play and that particles attract each other locally according to the classical Derjaguin, Landau, Verwey, and Overbeek (DLVO) model of colloid interactions, resulting in a small-domain regime of attractive nematiclike ordering. In the third regime, for ionic strengths above approximately 10 mM, the clay particles aggregate into larger assemblies, due to the dominant van der Waals force, and the observed birefringency is reduced. We have studied the nematic phase in detail between crossed polarizers and have found textures showing nematic Schlieren patterns. By rotating the polarizers as well as the samples, we have observed examples of disclinations of strengths -1, -1/2, and +1.
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Affiliation(s)
- N I Ringdal
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
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48
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Grybos M, Michot LJ, Skiba M, Billard P, Mustin C. Dissolution of anisotropic colloidal mineral particles: Evidence for basal surface reactivity of nontronite. J Colloid Interface Sci 2010; 343:433-8. [DOI: 10.1016/j.jcis.2009.11.058] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Revised: 11/21/2009] [Accepted: 11/24/2009] [Indexed: 10/20/2022]
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49
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Yella A, Tahir MN, Meuer S, Zentel R, Berger R, Panthöfer M, Tremel W. Synthesis, Characterization, and Hierarchical Organization of Tungsten Oxide Nanorods: Spreading Driven by Marangoni Flow. J Am Chem Soc 2009; 131:17566-75. [DOI: 10.1021/ja9007479] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aswani Yella
- Institut für Anorganische Chemie und Analytische Chemie, and Institut für Organische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany, and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Muhammad Nawaz Tahir
- Institut für Anorganische Chemie und Analytische Chemie, and Institut für Organische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany, and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Stefan Meuer
- Institut für Anorganische Chemie und Analytische Chemie, and Institut für Organische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany, and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Rudolf Zentel
- Institut für Anorganische Chemie und Analytische Chemie, and Institut für Organische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany, and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Rüdiger Berger
- Institut für Anorganische Chemie und Analytische Chemie, and Institut für Organische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany, and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Martin Panthöfer
- Institut für Anorganische Chemie und Analytische Chemie, and Institut für Organische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany, and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie, and Institut für Organische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany, and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
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50
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Paineau E, Antonova K, Baravian C, Bihannic I, Davidson P, Dozov I, Impéror-Clerc M, Levitz P, Madsen A, Meneau F, Michot LJ. Liquid-Crystalline Nematic Phase in Aqueous Suspensions of a Disk-Shaped Natural Beidellite Clay. J Phys Chem B 2009; 113:15858-69. [DOI: 10.1021/jp908326y] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- E. Paineau
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - K. Antonova
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - C. Baravian
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - I. Bihannic
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - P. Davidson
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - I. Dozov
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - M. Impéror-Clerc
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - P. Levitz
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - A. Madsen
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - F. Meneau
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
| | - L. J. Michot
- Laboratoire Environnement et Minéralurgie, Nancy University CNRS-INPL UMR 7569, BP40 54501 Vandœuvre Cedex France, Institute of Solid State Physics, Bulgarian Academy of Sciences, Boulevard Tzarigradsko Chaussee 72, Sofia, 1784, Bulgaria, Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, Nancy University UMR 7563 CNRS-INPL-UHP, 2, Avenue de la Forêt de Haye, BP160 54504 Vandœuvre Cedex, France, Laboratoire de Physique des Solides, UMR 8502 CNRS-Université Paris-Sud Bât 510 91405 Orsay
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