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Iakunkov A, Nordenström A, Boulanger N, Hennig C, Baburin I, Talyzin AV. Temperature-dependent swelling transitions in MXene Ti 3C 2T x. NANOSCALE 2022; 14:10940-10949. [PMID: 35856786 DOI: 10.1039/d2nr03075f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Swelling is a property of hydrophilic layered materials, which enables the penetration of polar solvents into an interlayer space with expansion of the lattice. Here we report an irreversible swelling transition, which occurs in MXenes immersed in excess dimethyl sulfoxide (DMSO) upon heating at 362-370 K with an increase in the interlayer distance by 4.2 Å. The temperature dependence of MXene Ti3C2Tx swelling in several polar solvents was studied using synchrotron radiation X-ray diffraction. MXenes immersed in excess DMSO showed a step-like increase in the interlayer distance from 17.73 Å at 280 K to 22.34 Å above ∼362 K. The phase transformation corresponds to a transition from the MXene structure with one intercalated DMSO layer into a two-layer solvate phase. The transformation is irreversible and the expanded phase remains after cooling back to room temperature. A similar phase transformation was observed also for MXene immersed in a 2 : 1 H2O : DMSO solvent ratio but at a lower temperature. The structure of MXene in the mixed solvent below 328 K was affected by the interstratification of differently hydrated (H2O)/solvated (DMSO) layers. Above the temperature of the transformation, the water was expelled from MXene interlayers and the formation of a pure two-layer DMSO-MXene phase was found. No changes in the swelling state were observed for MXenes immersed in DMSO or methanol at temperatures below ambient down to 173 K. Notably, MXenes do not swell in 1-alcohols larger than ethanol at ambient temperature. Changing the interlayer distance of MXenes by simple temperature cycling can be useful in membrane applications, e.g. when a larger interlayer distance is required for the penetration of ions and molecules into membranes. Swelling is also very important in electrode materials since it allows penetration of the electrolyte ions into the interlayers of the MXene structure.
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Affiliation(s)
- Artem Iakunkov
- Department of Physics, Umeå University, Umeå, SE-901 87, Sweden.
| | | | | | - Christoph Hennig
- Institute of Resource Ecology, Helmholtz Zentrum Dresden Rossendorf, Bautzner Landstrasse 400, 01328, Dresden, Germany
- The Rossendorf Beamline, European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Igor Baburin
- Theoretische Chemie, Technische Universität Dresden, 01062, Dresden, Germany
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2
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The Prospects of Clay Minerals from the Baltic States for Industrial-Scale Carbon Capture: A Review. MINERALS 2022. [DOI: 10.3390/min12030349] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Carbon capture is among the most sustainable strategies to limit carbon dioxide emissions, which account for a large share of human impact on climate change and ecosystem destruction. This growing threat calls for novel solutions to reduce emissions on an industrial level. Carbon capture by amorphous solids is among the most reasonable options as it requires less energy when compared to other techniques and has comparatively lower development and maintenance costs. In this respect, the method of carbon dioxide adsorption by solids can be used in the long-term and on an industrial scale. Furthermore, certain sorbents are reusable, which makes their use for carbon capture economically justified and acquisition of natural resources full and sustainable. Clay minerals, which are a universally available and versatile material, are amidst such sorbents. These materials are capable of interlayer and surface adsorption of carbon dioxide. In addition, their modification allows to improve carbon dioxide adsorption capabilities even more. The aim of the review is to discuss the prospective of the most widely available clay minerals in the Baltic States for large-scale carbon dioxide emission reduction and to suggest suitable approaches for clay modification to improve carbon dioxide adsorption capacity.
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3
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Michels-Brito PH, Dudko V, Wagner D, Markus P, Papastavrou G, Michels L, Breu J, Fossum JO. Bright, noniridescent structural coloration from clay mineral nanosheet suspensions. SCIENCE ADVANCES 2022; 8:eabl8147. [PMID: 35080971 PMCID: PMC8791460 DOI: 10.1126/sciadv.abl8147] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 12/06/2021] [Indexed: 05/25/2023]
Abstract
Structural colors originate by constructive interference following reflection and scattering of light from nanostructures with periodicity comparable to visible light wavelengths. Bright and noniridescent structural colorations are highly desirable. Here, we demonstrate that bright noniridescence structural coloration can be easily and rapidly achieved from suspended two-dimensional nanosheets of a clay mineral. We show that brightness is enormously improved by using double clay nanosheets, thus optimizing the clay refractive index that otherwise hampers structural coloration from such systems. Intralayer distances, and thus the structural colors, can be precisely and reproducibly controlled by clay concentration and ionic strength independently, and noniridescence is readily and effortlessly obtained in this system. Embedding such clay-designed nanosheets in recyclable solid matrices could provide tunable vivid coloration and mechanical strength and stability at the same time, thus opening a previously unknown venue for sustainable structural coloration.
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Affiliation(s)
- Paulo H. Michels-Brito
- Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Volodymyr Dudko
- Department of Inorganic Chemistry I and Bavarian Polymer Institute, University of Bayreuth, Bayreuth, Germany
| | - Daniel Wagner
- Department of Inorganic Chemistry I and Bavarian Polymer Institute, University of Bayreuth, Bayreuth, Germany
| | - Paul Markus
- Department of Physical Chemistry II and Bavarian Polymer Institute, University of Bayreuth, Bayreuth, Germany
| | - Georg Papastavrou
- Department of Physical Chemistry II and Bavarian Polymer Institute, University of Bayreuth, Bayreuth, Germany
| | - Leander Michels
- Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Josef Breu
- Department of Inorganic Chemistry I and Bavarian Polymer Institute, University of Bayreuth, Bayreuth, Germany
| | - Jon Otto Fossum
- Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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4
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Kumar A, Cruz C, Figueirinhas JL, Sebastião PJ, Trindade AC, Fernandes SN, Godinho MH, Fossum JO. Water Dynamics in Composite Aqueous Suspensions of Cellulose Nanocrystals and a Clay Mineral Studied through Magnetic Resonance Relaxometry. J Phys Chem B 2021; 125:12787-12796. [PMID: 34762439 DOI: 10.1021/acs.jpcb.1c07331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1H spin-lattice relaxation time (T1) measurements were performed to probe the dynamic behavior of water in aqueous suspensions of cellulose nanocrystals (CNCs) and a layered smectite clay mineral with different degrees of concentration. 1H-T1 experiments were carried out over a wide frequency domain, ranging from a few kilohertz to 500 MHz, with the aid of conventional and fast field cycling nuclear magnetic resonance (NMR) techniques. The experimental relaxometry data illustrate differences between the dynamic behavior of bulk water and that confined in the vicinity of CNC-clay surfaces. Clay alone in moderate concentration was found to enforce almost no effect on the water dynamics, whereas introducing CNCs to the system presented a significantly enhanced relaxivity. The modeling of the relaxation dispersions allowed the determination of dynamical processes and variables explaining the dynamic behavior of water in CNC-clay suspensions. It turned out that reorientations mediated by translational displacements are a leading NMR relaxation mechanism for water interacting with the surfaces of CNC-clay particles in the low-frequency domain. In the high-frequency regime, however, the inner-sphere paramagnetic relaxation mechanism dominates, which is caused by the interaction of water protons with dissolved Fe ions.
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Affiliation(s)
- Anant Kumar
- Centro de Física e Engenharia de Materiais Avançados, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Carlos Cruz
- Centro de Física e Engenharia de Materiais Avançados, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - João L Figueirinhas
- Centro de Física e Engenharia de Materiais Avançados, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Pedro J Sebastião
- Centro de Física e Engenharia de Materiais Avançados, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Ana C Trindade
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7492 Trondheim, Norway
| | - Susete N Fernandes
- i3N/CENIMAT, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Maria H Godinho
- i3N/CENIMAT, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Jon Otto Fossum
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7492 Trondheim, Norway
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5
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Dashtian H, Bakhshian S. Effects of salinity and shear stress on clay deformation: A molecular dynamics study. J Chem Phys 2021; 155:134304. [PMID: 34624991 DOI: 10.1063/5.0062919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The deformation of clay minerals is an important phenomenon that is relevant to many problems, particularly those that occur in subsurface geological formations. The salinity of the formations and external shear stress applied to them are two important factors that contribute to the deformation of such porous media. To gain a deeper understanding of such phenomena, we have carried out extensive molecular dynamics simulations using the Na-montmorillonite (Na-MMT) structure as the model of clay minerals and have studied the effect of salt concentration on its swelling. As the NaCl concentration increases, so also does the basal spacing. We demonstrate the effect of the coupling between the applied shear stress and NaCl salinity on the swelling behavior of Na-MMT, namely, deformation of the interlayer space that results in swelling. According to the results, the extent of Na-MMT deformation depends on both the brine salinity and the shear rate.
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Affiliation(s)
| | - Sahar Bakhshian
- Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas 78713, USA
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6
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Properties of polyethylcyanoacrylate/modified Mt composites with highly exfoliated montmorillonite. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-020-03402-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Taheri-Ledari R, Zhang W, Radmanesh M, Cathcart N, Maleki A, Kitaev V. Plasmonic photothermal release of docetaxel by gold nanoparticles incorporated onto halloysite nanotubes with conjugated 2D8-E3 antibodies for selective cancer therapy. J Nanobiotechnology 2021; 19:239. [PMID: 34380469 PMCID: PMC8359560 DOI: 10.1186/s12951-021-00982-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 07/28/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Applied nanomaterials in targeted drug delivery have received increased attention due to tangible advantages, including enhanced cell adhesion and internalization, controlled targeted release, convenient detection in the body, enhanced biodegradation, etc. Furthermore, conjugation of the biologically active ingredients with the drug-containing nanocarriers (nanobioconjugates) has realized impressive opportunities in targeted therapy. Among diverse nanostructures, halloysite nanotubes (NHTs) with a rolled multilayer structure offer great possibilities for drug encapsulation and controlled release. The presence of a strong hydrogen bond network between the rolled HNT layers enables the controlled release of the encapsulated drug molecules through the modulation of hydrogen bonding either in acidic conditions or at higher temperatures. The latter can be conveniently achieved through the photothermal effect via the incorporation of plasmonic nanoparticles. RESULTS The developed nanotherapeutic integrated natural halloysite nanotubes (HNTs) as a carrier; gold nanoparticles (AuNPs) for selective release; docetaxel (DTX) as a cytotoxic anticancer agent; human IgG1 sortilin 2D8-E3 monoclonal antibody (SORT) for selective targeting; and 3-chloropropyltrimethoxysilane as a linker for antibody attachment that also enhances the hydrophobicity of DTX@HNT/Au-SORT and minimizes DTX leaching in body's internal environment. HNTs efficiently store DTX at room temperature and release it at higher temperatures via disruption of interlayer hydrogen bonding. The role of the physical expansion and disruption of the interlayer hydrogen bonding in HNTs for the controlled DTX release has been studied by dynamic light scattering (DLS), electron microscopy (EM), and differential scanning calorimetry (DSC) at different pH conditions. HNT interlayer bond disruption has been confirmed to take place at a much lower temperature (44 °C) at low pH vs. 88 °C, at neutral pH thus enabling the effective drug release by DTX@HNT/Au-SORT through plasmonic photothermal therapy (PPTT) by light interaction with localized plasmon resonance (LSPR) of AuNPs incorporated into the HNT pores. CONCLUSIONS Selective ovarian tumor targeting was accomplished, demonstrating practical efficiency of the designed nanocomposite therapeutic, DTX@HNT/Au-SORT. The antitumor activity of DTX@HNT/Au-SORT (apoptosis of 90 ± 0.3%) was confirmed by in vitro experiments using a caov-4 (ATCC HTB76) cell line (sortilin expression > 70%) that was successfully targeted by the sortilin 2D8-E3 mAb, tagged on the DTX@HNT/Au.
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Affiliation(s)
- Reza Taheri-Ledari
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Wenjie Zhang
- Department of Nuclear Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Alley, Chengdu, 610041, Sichuan, People's Republic of China
| | - Maral Radmanesh
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Nicole Cathcart
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, 75 University Ave. W., Waterloo, ON, Canada
| | - Ali Maleki
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran.
| | - Vladimir Kitaev
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, 75 University Ave. W., Waterloo, ON, Canada.
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8
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Michels-Brito PH, Malfatti-Gasperini A, Mayr L, Puentes-Martinez X, Tenório RP, Wagner DR, Knudsen KD, Araki K, Oliveira RG, Breu J, Cavalcanti LP, Fossum JO. Unmodified Clay Nanosheets at the Air-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:160-170. [PMID: 33373239 PMCID: PMC8154875 DOI: 10.1021/acs.langmuir.0c02670] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 12/16/2020] [Indexed: 05/31/2023]
Abstract
Quasi-two-dimensional (2D) nanolayers, such as graphene oxide or clay layers, adhere to gas-liquid or liquid-liquid interfaces. Particularly, clays are of wide general interest in this context because of their extensive and crucial use as Pickering emulsion stabilizers, as well as for their ability to provide colloidosome capsules. So far, clays could only be localized at oil-water or air-saline-water interfaces in aggregated states, while our results now show that clay nanosheets without any modification can be located at air-deionized-water interfaces. The clay mineral used in the present work is synthetic fluorohectorite with a very high aspect ratio and superior quality in homogeneity and charge distribution compared to other clay minerals. This clay mineral is more suitable for achieving unmodified clay anchoring to fluid interfaces compared to other clay minerals used in previous works. In this context, we studied clay nanosheet organization at the air-water interface by combining different experimental methods: Langmuir-Blodgett trough studies, scanning electron microscopy (SEM) studies of film deposits, grazing-incidence X-ray off-specular scattering (GIXOS), and Brewster angle microscopy (BAM). Clay films formed at the air-water interface could be transferred to solid substrates by the Langmuir-Schaefer method. The BAM results indicate a dynamic equilibrium between clay sheets on the interface and in the subphase. Because of this dynamic equilibrium, the Langmuir monolayer surface pressure does not change significantly when pure clay sheets are spread on the liquid surface. However, also, GIXOS results confirm that there are clay nanosheets at the air-water interface. In addition, we find that clay sheets modified by a branched polymer are much more likely to be confined to the interface.
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Affiliation(s)
- Paulo H. Michels-Brito
- Department
of Physics, Norwegian University of Science
and Technology, NTNU, 7491 Trondheim, Norway
| | - Antonio Malfatti-Gasperini
- Brazilian
Synchrotron Light Laboratory, LNLS, Brazilian
Center for Research in Energy and Materials, CNPEM, Campinas 13083-970, Brazil
| | - Lina Mayr
- Bavarian
Polymer Institute and Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | | | - Rômulo P. Tenório
- Northeast
Regional Center of Nuclear Sciences, Recife 50740-545,Brazil
| | - Daniel R. Wagner
- Bavarian
Polymer Institute and Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | - Kenneth D. Knudsen
- Department
of Physics, Norwegian University of Science
and Technology, NTNU, 7491 Trondheim, Norway
- Institute
for Energy Technology, IFE, Kjeller 2027, Norway
| | - Koiti Araki
- Department
of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, USP, São Paulo 05513-970, Brazil
| | - Rafael G. Oliveira
- Centro
de Investigaciones en Química Biológica de Córdoba
(CIQUIBIC)-Departamento de Química Biológica Dr. Ranwel
Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba X5000HUA, Argentina
| | - Josef Breu
- Bavarian
Polymer Institute and Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | | | - Jon Otto Fossum
- Department
of Physics, Norwegian University of Science
and Technology, NTNU, 7491 Trondheim, Norway
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9
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Fossum JO. Clay nanolayer encapsulation, evolving from origins of life to future technologies. THE EUROPEAN PHYSICAL JOURNAL. SPECIAL TOPICS 2020; 229:2863-2879. [PMID: 33224440 PMCID: PMC7666717 DOI: 10.1140/epjst/e2020-000131-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/06/2020] [Indexed: 05/31/2023]
Abstract
Clays are the siblings of graphite and graphene/graphene-oxide. There are two basic ways of using clays for encapsulation of sub-micron entities such as molecules, droplets, or nanoparticles, which is either by encapsulation in the interlayer space of clay nanolayered stacked particles ("the graphite way"), or by using exfoliated clay nanolayers to wrap entities in packages ("the graphene way"). Clays maybe the prerequisites for life on earth and can also be linked to the natural formation of other two-dimensional materials such as naturally occurring graphite and its allotropes. Here we discuss state-of-the-art in the area of clay-based encapsulation and point to some future scientific directions and technological possibilities that could emerge from research in this area.
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Affiliation(s)
- Jon Otto Fossum
- Laboratory for Soft and Complex Matter Studies, Department of Physics, Norwegian University of Science and Technology – NTNU, Trondheim, Norway
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10
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Lee Y, Kim P, Kim H, Seoung D. Comparative Compressibility of Smectite Group under Anhydrous and Hydrous Environments. MATERIALS 2020; 13:ma13173784. [PMID: 32867230 PMCID: PMC7503564 DOI: 10.3390/ma13173784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 08/23/2020] [Accepted: 08/24/2020] [Indexed: 11/25/2022]
Abstract
High-pressure synchrotron X-ray powder diffraction studies of smectite group minerals (beidellite, montmorillonite, and nontronite) reveal comparative volumetric changes in the presence of different fluids, as pressure transmitting media (PTM) of silicone oil and distilled water for anhydrous and hydrous environments at room temperature. Using silicone oil PTM, all minerals show gradual contraction of unit-cell volumes and atomistic interplane distances. They, however, show abrupt collapse near 1.0 GPa under distilled water conditions due to hydrostatic to quasi-hydrostatic environmental changes of water PTM around samples concomitant with the transition from liquid to ICE-VI and ICE-VII. The degrees of volume contractions of beidellite, montmorillonite, and nontronite up to ca. 3 GPa are ca. 6.6%, 8.9%, and 7.5% with bulk moduli of ca. 38(1) GPa, 31(2) GPa, and 26(1) GPa under silicone oil pressure, whereas 13(1) GPa, 13(2) GPa, and 17(2) GPa, and 17(1) GPa, 20(1) GPa, and 21(1) GPa under hydrostatic and quasi-hydrostatic environments before and after 1.50 GPa, respectively.
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Affiliation(s)
- Yongmoon Lee
- Department of Geological Sciences, Pusan National University, Busan 46241, Korea;
| | - Pyosang Kim
- Department of Earth Systems and Environmental Sciences, Chonnam National University, Gwangju 61186, Korea; (P.K.); (H.K.)
| | - Hyeonsu Kim
- Department of Earth Systems and Environmental Sciences, Chonnam National University, Gwangju 61186, Korea; (P.K.); (H.K.)
| | - Donghoon Seoung
- Department of Earth Systems and Environmental Sciences, Chonnam National University, Gwangju 61186, Korea; (P.K.); (H.K.)
- Correspondence: ; Tel.: +82-62-530-3452
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11
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Wang H, Sun Y, Chu J, Wang X, Ji Y, Zhang M. An intensive exploration on structure transformation of talc under γ-ray irradiation at 0–1000 kGy. J Radioanal Nucl Chem 2020. [DOI: 10.1007/s10967-020-07226-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Mayr L, Amschler S, Edenharter A, Dudko V, Kunz R, Rosenfeldt S, Breu J. Osmotic Swelling of Sodium Hectorite in Ternary Solvent Mixtures: Nematic Liquid Crystals in Hydrophobic Media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3814-3820. [PMID: 32196347 DOI: 10.1021/acs.langmuir.0c00373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The swelling of clay minerals in organic solvents or solvent mixtures is key for the fabrication of polymer nanocomposites with perfectly dispersed filler that contain only individual clay layers. Here, we investigated the swelling behavior of sodium hectorite in different ternary solvent mixtures containing methanol, acetonitrile, ethylene glycol, or glycerol carbonate with minimal amounts of water. We found that in these mixtures, less water is required than in the corresponding binary mixtures to allow for complete delamination by repulsive osmotic swelling. A quantitative study of osmotic swelling in a particular ternary mixture shows that organic solvents resemble swelling behavior in pure water. At hectorite contents larger than 5 vol %, the separation of individual layers scales with ϕ-1. At this concentration, a crossover is observed and swelling continues at a slower pace (ϕ-0.5) below this value.
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Affiliation(s)
- Lina Mayr
- Department of Chemistry and Bavarian Polymer Institute, University of Bayreuth, 95447 Bayreuth, Germany
| | - Sonja Amschler
- Department of Chemistry and Bavarian Polymer Institute, University of Bayreuth, 95447 Bayreuth, Germany
| | - Andreas Edenharter
- Department of Chemistry and Bavarian Polymer Institute, University of Bayreuth, 95447 Bayreuth, Germany
| | - Volodymyr Dudko
- Department of Chemistry and Bavarian Polymer Institute, University of Bayreuth, 95447 Bayreuth, Germany
| | - Raphael Kunz
- Department of Chemistry and Bavarian Polymer Institute, University of Bayreuth, 95447 Bayreuth, Germany
| | - Sabine Rosenfeldt
- Department of Chemistry and Bavarian Polymer Institute, University of Bayreuth, 95447 Bayreuth, Germany
| | - Josef Breu
- Department of Chemistry and Bavarian Polymer Institute, University of Bayreuth, 95447 Bayreuth, Germany
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13
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Assembly of clay mineral platelets, tactoids, and aggregates: Effect of mineral structure and solution salinity. J Colloid Interface Sci 2020; 566:163-170. [DOI: 10.1016/j.jcis.2020.01.084] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/20/2020] [Accepted: 01/22/2020] [Indexed: 11/21/2022]
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14
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Michels L, Méheust Y, Altoé MAS, Dos Santos ÉC, Hemmen H, Droppa R, Fossum JO, da Silva GJ. Water vapor diffusive transport in a smectite clay: Cationic control of normal versus anomalous diffusion. Phys Rev E 2019; 99:013102. [PMID: 30780303 DOI: 10.1103/physreve.99.013102] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Indexed: 11/07/2022]
Abstract
The transport of chemical species in porous media is ubiquitous in subsurface processes, including contaminant transport, soil drying, and soil remediation. We study vapor transport in a multiscale porosity material, a smectite clay, in which water molecules travel in mesopores and macropores between the clay grains but can also intercalate inside the nanoporous grains, making them swell. The intercalation dynamics is known to be controlled by the type of cation that is present in the nanopores; in this case exchanging the cations from Na^{+} to Li^{+} accelerates the dynamics. By inferring spatial profiles of mesoporous humidity from a space-resolved measurement of grain swelling, and analyzing them with a fractional diffusion equation, we show that exchanging the cations changes mesoporous transport from Fickian to markedly subdiffusive. This results both from modifying the exchange dynamics between the mesoporous and nanoporous phases, and from the feedback of transport on the medium's permeability due to grain swelling. An important practical implication is a large difference in the time needed for vapor to permeate a given length of the clay depending on the type of intercalated cation.
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Affiliation(s)
- Leander Michels
- Department of Physics, NTNU-Norwegian University of Science and Technology, NO-7495 Trondheim, Norway
| | - Yves Méheust
- Géosciences Rennes, UMR 6118, Univ. Rennes, CNRS, 35000 Rennes, France
| | - Mario A S Altoé
- Instituto de Física, UnB-Universidade de Brasília, 70.919-970 Brasília DF, Brazil.,Departamento de Química e Física, UFES-Universidade Federal do Espírito Santo, Alto Universitário, S/N, Guararema, 29500-000 Alegre-ES, Brazil
| | - Éverton C Dos Santos
- Department of Physics, NTNU-Norwegian University of Science and Technology, NO-7495 Trondheim, Norway.,NBI-Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Henrik Hemmen
- Department of Physics, NTNU-Norwegian University of Science and Technology, NO-7495 Trondheim, Norway
| | - Roosevelt Droppa
- Centro de Ciências Naturais e Humanas, UFABC-Universidade Federal do ABC, 09.210-580, Santo André SP, Brazil
| | - Jon O Fossum
- Department of Physics, NTNU-Norwegian University of Science and Technology, NO-7495 Trondheim, Norway
| | - Geraldo J da Silva
- Instituto de Física, UnB-Universidade de Brasília, 70.919-970 Brasília DF, Brazil
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15
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Li X, Li Q, Yang S, Yang G. Swelling of clay minerals: dual characteristics of K + ions and exploration of critical influencing factors. Phys Chem Chem Phys 2019; 21:1963-1971. [PMID: 30633276 DOI: 10.1039/c8cp07567k] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Clay swelling occurs frequently and is closely relevant to a number of engineering and industrial processes, while the underlying mechanisms remain elusive. In this study, K+-bearing clay systems with different charge amounts and charge locations have been simulated by molecular dynamics, showing that swelling is unfavorable for lower charge amounts (1.00 and 1.25 e uc-1) while it relies on charge locations for higher charge amounts (1.50 and 1.75 e uc-1): inhibited when tetrahedrally charged and favored when octahedrally charged. Accordingly, K+ shows dual characteristics and is not always a swelling inhibitor as generally thought. The various influencing factors are inspected and only the hydration effect interprets satisfactorily the swelling behaviors for all K+-bearing clay systems. The critical role of hydration effect during clay swelling is corroborated by the results of residence time, distribution of interlayer water and divergent swelling behaviors from Na+-bearing clay systems. Although water participates in a wide spectrum of physical and chemical processes, hydration is not necessarily among the most important influencing factors. Hydration effect has been evidenced as critical for clay swelling, and the results provide new insights into unraveling the complex swelling processes and resolving the associated engineering and industrial problems.
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Affiliation(s)
- Xiong Li
- College of Resources and Environment & Chongqing Key Laboratory of Soil Multi-scale Interfacial Process, Southwest University, Chongqing 400715, China.
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16
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Cheng P, Chen Y, Yan X, Wang Y, Lang WZ. Highly Stable and Antibacterial Two-Dimensional Tungsten Disulfide Lamellar Membrane for Water Filtration. CHEMSUSCHEM 2019; 12:275-282. [PMID: 30430758 DOI: 10.1002/cssc.201802235] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/12/2018] [Indexed: 06/09/2023]
Abstract
Two-dimensional (2D) lamellar membranes consisting of restacked WS2 nanosheets have shown excellent separation properties for water filtration. The stability, antifouling properties, and antibacterial activities of the WS2 laminar membranes were investigated for practical application. We discovered that the separation properties of the WS2 laminar membranes changed slightly after soaking in water for 28 days as well as that of a 45 h-cross-flow filtration, demonstrating an extraordinary operational stability of the WS2 laminar membranes. The remarkable stability is related to the dominant van der Waals interactions between WS2 nanosheets. In addition, the WS2 laminar membranes exhibited excellent antibacterial properties against S. aureus and E. coli with antibacterial rates of 91.3 % and 89.7 %, respectively. These properties of the WS2 laminar membranes make them promising candidates for application in water filtration.
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Affiliation(s)
- Peng Cheng
- The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Department of Chemistry and Chemical Engineering, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, P.R. China
| | - Yan Chen
- The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Department of Chemistry and Chemical Engineering, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, P.R. China
| | - Xi Yan
- The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Department of Chemistry and Chemical Engineering, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, P.R. China
| | - Yanjie Wang
- School of Materials Science and Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou, 510640, P.R. China
| | - Wan-Zhong Lang
- The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Department of Chemistry and Chemical Engineering, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, P.R. China
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17
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Honorio T, Brochard L, Vandamme M, Lebée A. Flexibility of nanolayers and stacks: implications in the nanostructuration of clays. SOFT MATTER 2018; 14:7354-7367. [PMID: 30187051 DOI: 10.1039/c8sm01359d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The basic structural units of adsorbing microporous materials such as clays and cementitious materials are flexible nanolayers. The flexibility of these layers is reported to play a crucial role in the structuration of these materials, potentially affecting therefore the thermo-mechanical behavior of such materials. Adsorbed fluids are structured in a discrete number of layers within the space between the nanolayers in these materials. This discrete nature of adsorption states may lead to micro-instabilities due to non-convex energy profiles. The transition between adsorption states may involve the bending of layers. Bending contributes to metastability, which is reported to be a potential source of the irreversibilities notably in clay behavior. In this paper, we determine the bending modulus of clay nanolayers by the combination of plate theory with molecular simulations of sodium montmorillonite. The case of clays is illustrative of the behavior of phyllosilicates (i.e. sheet-silicates) which are ubiquitous minerals in the Earth's crust. We discuss the conditions in which clay particles, i.e. a stack of nanolayers, can be viewed as thin plates. Estimations of the bending modulus according to the hydration state and dimensions of clay particles are provided. We analyze the implications of the flexibility of the layers in the behavior of a stack of layers as well as in the transitions between adsorption states. The energy barrier associated with bending of clay layers and the characteristic length of bending in such transitions are provided. Our results contribute to a better understanding of the nanostructure of layered adsorbing materials.
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Affiliation(s)
- Tulio Honorio
- Université Paris-Est, Laboratoire Navier (UMR 8205), CNRS, ENPC, IFSTTAR, 6 & 8 Avenue Blaise Pascal, 77455 Marne-la-Vallée, France.
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18
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Cavalcanti LP, Kalantzopoulos GN, Eckert J, Knudsen KD, Fossum JO. A nano-silicate material with exceptional capacity for CO 2 capture and storage at room temperature. Sci Rep 2018; 8:11827. [PMID: 30087394 PMCID: PMC6081458 DOI: 10.1038/s41598-018-30283-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 07/26/2018] [Indexed: 11/09/2022] Open
Abstract
In order to mitigate climate change driven by the observed high levels of carbon dioxide (CO2) in the atmosphere, many micro and nano-porous materials are being investigated for CO2 selectivity, capture and storage (CCS) purposes, including zeolites, metal organic frameworks (MOFs), functionalized polymers, activated carbons and nano-silicate clay minerals. Key properties include availability, non-toxicity, low cost, stability, energy of adsorption/desorption, sorbent regeneration, sorption kinetics and CO2 storage capacity. Here, we address the crucial point of the volumetric capture and storage capacity for CO2 in a low cost material which is natural, non-toxic, and stable. We show that the nano-silicate Nickel Fluorohectorite is able to capture 0.79 metric tons of CO2 per m3 of host material - one of the highest capacities ever achieved - and we compare volumetric and gravimetric capacity of the best CO2 sorbent materials reported to date. Our results suggest that the high capture capacity of this fluorohectorite clay is strongly coupled to the type and valence of the interlayer cation (here Ni2+) and the high charge density, which is almost twice that of montmorillonite, resulting in the highest reported CO2 uptake among clay minerals.
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Affiliation(s)
| | - Georgios N Kalantzopoulos
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, Oslo, Norway
| | | | - Kenneth D Knudsen
- Institute for Energy Technology (IFE), Kjeller, Norway.,Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Jon Otto Fossum
- Norwegian University of Science and Technology (NTNU), Trondheim, Norway.
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19
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Wang Z, Tu Q, Zheng S, Urban JJ, Li S, Mi B. Understanding the Aqueous Stability and Filtration Capability of MoS 2 Membranes. NANO LETTERS 2017; 17:7289-7298. [PMID: 29160714 DOI: 10.1021/acs.nanolett.7b02804] [Citation(s) in RCA: 151] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Membranes made of layer-stacked two-dimensional molybdenum disulfide (MoS2) nanosheets have recently shown great promise for water filtration. At present, the reported water fluxes vary significantly, while the accountable structure and properties of MoS2 nanochannels are largely unknown. This paper aims to mechanistically relate the performance of MoS2 membranes to the size of their nanochannels in different hydration states. We discovered that fully hydrated MoS2 membranes retained a 1.2 nm interlayer spacing (or 0.9 nm free spacing), leading to high water permeability and moderate-to-high ionic and molecular rejection. In comparison, completely dry MoS2 membranes had a 0.62 nm interlayer spacing (or 0.3 nm free spacing) due to irreversible nanosheet restacking and were almost impermeable to water. Furthermore, we revealed that the interlayer spacing of MoS2 membranes in aqueous solution is maintained by comparable van der Waals and hydration forces, thereby ensuring the aqueous stability of MoS2 membranes without the need of cross-linking. In addition, we attributed the high water flux (30-250 L m-2 h-1 bar-1) of MoS2 membranes to the low hydraulic resistance of smooth, rigid MoS2 nanochannels. We also concluded that compaction of MoS2 membranes with a high pressure helps create a more neatly stacked nanostructure with minimum voids or looseness, leading to stable water flux and separation performance. Besides, this paper systematically compares MoS2 membranes with the widely studied graphene oxide membranes to highlight the uniqueness and advantages of MoS2 membranes for water-filtration applications.
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Affiliation(s)
- Zhongying Wang
- Department of Civil and Environmental Engineering, University of California, Berkeley , Berkeley, California 94720, United States
| | - Qingsong Tu
- Department of Civil and Environmental Engineering, University of California, Berkeley , Berkeley, California 94720, United States
| | - Sunxiang Zheng
- Department of Civil and Environmental Engineering, University of California, Berkeley , Berkeley, California 94720, United States
| | - Jeffrey J Urban
- The Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Shaofan Li
- Department of Civil and Environmental Engineering, University of California, Berkeley , Berkeley, California 94720, United States
| | - Baoxia Mi
- Department of Civil and Environmental Engineering, University of California, Berkeley , Berkeley, California 94720, United States
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20
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Valdés L, Pérez I, de Ménorval LC, Altshuler E, Fossum JO, Rivera A. A simple way for targeted delivery of an antibiotic: In vitro evaluation of a nanoclay-based composite. PLoS One 2017; 12:e0187879. [PMID: 29149176 PMCID: PMC5693412 DOI: 10.1371/journal.pone.0187879] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 10/28/2017] [Indexed: 11/29/2022] Open
Abstract
The sodium-modified form of fluorohectorite nanoclay (NaFh) is introduced as a potential drug carrier, demonstrating its ability for the controlled release of the broad-spectrum antibiotic Ciprofloxacin through in vitro tests. The new clay-drug composite is designed to target the local infections in the large intestine, where it delivers most of the incorporated drug thanks to its pH-sensitive behavior. The composite has been conceived to avoid the use of coating technology and to decrease the side-effects commonly associated to the burst-release of the ciprofloxacin at the stomach level. NaFh was obtained from lithium-fluorohectorite by ion exchange, and its lack of toxicity was demonstrated by in vivo studies. Ciprofloxacin hydrochloride (Cipro) was encapsulated into the clay at different values of the pH, drug initial concentration, temperature and time. Systematic studies by X-ray diffraction (XRD), infrared and visible spectrophotometry (FT-IR and UV-vis), and thermal analysis (TGA) indicated that the NaFh host exhibits a high encapsulation efficiency for Cipro, which reaches a 90% of the initial Cipro in solution at 65 oC, with initial concentration of drug in solution of 1.36 x 10-2 mol L-1 at acid pH. XRD revealed that a true intercalation of Cipro takes place between clay layers. TG showed an increased thermal stability of the drug when intercalated into the clay, as compared to the "free" Cipro. IR suggested a strong clay-Cipro interaction via ketone group, as well as the establishment of hydrogen bonds between the two materials. In vitro drug release tests revealed that NaFh is a potentially efficient carrier to deliver Cipro in the large intestine, where the release process is mediated by more than just one mechanism.
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Affiliation(s)
- Leslie Valdés
- Department of Pharmacy, Institute of Pharmacy and Food (IFAL), University of Havana, Havana, Cuba
| | - Irela Pérez
- Department of Pharmacy, Institute of Pharmacy and Food (IFAL), University of Havana, Havana, Cuba
| | - Louis Charles de Ménorval
- Institut Charles Gerhardt Montpellier, Equipe Agregats, Interface, et Materiaux pour l'Energie (AIME), Université Montpellier 2, Montpellier, France
| | - Ernesto Altshuler
- Group of Complex Systems and Statistical Physics, Physics Faculty, University of Havana, Havana, Cuba
| | - Jon Otto Fossum
- Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Aramis Rivera
- Zeolites Engineering Laboratory, Institute of Materials Science and Technology (IMRE), University of Havana, Havana, Cuba
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21
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Madyan OA, Fan M. Temperature induced nature and behaviour of clay-PVA colloidal suspension and its aerogel composites. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.06.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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22
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Mikkelsen A, Dommersnes P, Rozynek Z, Gholamipour-Shirazi A, Carvalho MDS, Fossum JO. Mechanics of Pickering Drops Probed by Electric Field-Induced Stress. MATERIALS 2017; 10:ma10040436. [PMID: 28772796 PMCID: PMC5506933 DOI: 10.3390/ma10040436] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 03/26/2017] [Accepted: 04/13/2017] [Indexed: 01/08/2023]
Abstract
Fluid drops coated with particles, so-called Pickering drops, play an important role in emulsion and capsule applications. In this context, knowledge of mechanical properties and stability of Pickering drops are essential. Here we prepare Pickering drops via electric field-driven self-assembly. We use direct current (DC) electric fields to induce mechanical stress on these drops, as a possible alternative to the use of, for example, fluid flow fields. Drop deformation is monitored as a function of the applied electric field strength. The deformation of pure silicone oil drops is enhanced when covered by insulating polyethylene (PE) particles, whereas drops covered by conductive clay particles can also change shape from oblate to prolate. We attribute these results to changes in the electric conductivity of the drop interface after adding particles, and have developed a fluid shell description to estimate the conductivity of Pickering particle layers that are assumed to be non-jammed and fluid-like. Retraction experiments in the absence of electric fields are also performed. Particle-covered drops retract slower than particle-free drops, caused by increased viscous dissipation due to the presence of the Pickering particle layer.
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Affiliation(s)
- Alexander Mikkelsen
- Department of Physics, Norwegian University of Science and Technology, Høgskoleringen 5, NO-7491 Trondheim, Norway.
- Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland.
| | - Paul Dommersnes
- Department of Physics, Norwegian University of Science and Technology, Høgskoleringen 5, NO-7491 Trondheim, Norway.
| | - Zbigniew Rozynek
- Department of Physics, Norwegian University of Science and Technology, Høgskoleringen 5, NO-7491 Trondheim, Norway.
- Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland.
| | - Azarmidokht Gholamipour-Shirazi
- Department of Mechanical Engineering, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente, 225, Rio de Janeiro, Brazil.
| | - Marcio da Silveira Carvalho
- Department of Mechanical Engineering, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente, 225, Rio de Janeiro, Brazil.
| | - Jon Otto Fossum
- Department of Physics, Norwegian University of Science and Technology, Høgskoleringen 5, NO-7491 Trondheim, Norway.
- Department of Mechanical Engineering, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente, 225, Rio de Janeiro, Brazil.
- Institut Pierre-Gilles de Gennes, 6-12 rue Jean Calvin, Paris 75005, France.
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23
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dos Santos EC, Rozynek Z, Hansen EL, Hartmann-Petersen R, Klitgaard RN, Løbner-Olesen A, Michels L, Mikkelsen A, Plivelic TS, Bordallo HN, Fossum JO. Ciprofloxacin intercalated in fluorohectorite clay: identical pure drug activity and toxicity with higher adsorption and controlled release rate. RSC Adv 2017. [DOI: 10.1039/c7ra01384a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
We present the use of the synthetic clay fluorohectorite (Fh) as a drug delivery system of the antibiotic ciprofloxacin. The adsorption capacity is very high, and Fh promotes controlled drug release without changing drug effectiveness and toxicity.
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Affiliation(s)
- E. C. dos Santos
- Department of Physics
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
- Niels Bohr Institute (NBI)
| | - Z. Rozynek
- Department of Physics
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
- Faculty of Physics
| | - E. L. Hansen
- Department of Physics
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
| | | | - R. N. Klitgaard
- Department of Biology
- University of Copenhagen
- Copenhagen
- Denmark
| | | | - L. Michels
- Department of Physics
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
| | - A. Mikkelsen
- Department of Physics
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
- Faculty of Physics
| | | | - H. N. Bordallo
- Niels Bohr Institute (NBI)
- University of Copenhagen
- Copenhagen
- Denmark
- European Spallation Source ERIC
| | - J. O. Fossum
- Department of Physics
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
- Institute Pierre-Gilles de Gennes pour la microfluidique
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24
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Zarzycki P, Gilbert B. Long-Range Interactions Restrict Water Transport in Pyrophyllite Interlayers. Sci Rep 2016; 6:25278. [PMID: 27118164 PMCID: PMC4846866 DOI: 10.1038/srep25278] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/14/2016] [Indexed: 11/09/2022] Open
Abstract
Water diffusion within smectite clay interlayers is reduced by confinement and hence is highly determined by the interlayer spacings that are adopted during swelling. However, a molecular understanding of the short- and long-range forces governing interlayer water structure and dynamics is lacking. Using molecular dynamics simulations of water intercalated between pyrophyllite (smectite prototype) layers we provide a detailed picture of the variation of interlayered water mobility accompanying smectite expansion. Subtle changes in hydrogen bond network structure cause significant changes in water mobility that is greater for stable hydration states and reduced for intermediate separations. By studying pyrophyllite with and without external water we reveal that long-range electrostatic forces apply a restraining effect upon interlayer water mobility. Our findings are relevant for broad range of confining nanostructures with walls thin enough to permit long-range interactions that could affect the mobility of confined solvent molecules and solute species.
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Affiliation(s)
- Piotr Zarzycki
- Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Benjamin Gilbert
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
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25
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Intercalation and retention of carbon dioxide in a smectite clay promoted by interlayer cations. Sci Rep 2015; 5:8775. [PMID: 25739522 PMCID: PMC4350078 DOI: 10.1038/srep08775] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 01/29/2015] [Indexed: 11/16/2022] Open
Abstract
A good material for CO2 capture should possess some specific properties: (i) a large effective surface area with good adsorption capacity, (ii) selectivity for CO2, (iii) regeneration capacity with minimum energy input, allowing reutilization of the material for CO2 adsorption, and (iv) low cost and high environmental friendliness. Smectite clays are layered nanoporous materials that may be good candidates in this context. Here we report experiments which show that gaseous CO2 intercalates into the interlayer nano-space of smectite clay (synthetic fluorohectorite) at conditions close to ambient. The rate of intercalation, as well as the retention ability of CO2 was found to be strongly dependent on the type of the interlayer cation, which in the present case is Li+, Na+ or Ni2+. Interestingly, we observe that the smectite Li-fluorohectorite is able to retain CO2 up to a temperature of 35°C at ambient pressure, and that the captured CO2 can be released by heating above this temperature. Our estimates indicate that smectite clays, even with the standard cations analyzed here, can capture an amount of CO2 comparable to other materials studied in this context.
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26
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Rozynek Z, Mikkelsen A, Dommersnes P, Fossum JO. Electroformation of Janus and patchy capsules. Nat Commun 2014; 5:3945. [PMID: 24853057 PMCID: PMC4050235 DOI: 10.1038/ncomms4945] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 04/24/2014] [Indexed: 11/08/2022] Open
Abstract
Janus and patchy particles have designed heterogeneous surfaces that consist of two or several patches with different materials properties. These particles are emerging as building blocks for a new class of soft matter and functional materials. Here we introduce a route for forming heterogeneous capsules by producing highly ordered jammed colloidal shells of various shapes with domains of controlled size and composition. These structures combine the functionalities offered by Janus or patchy particles, and those given by permeable shells such as colloidosomes. The simple assembly route involves the synergetic action of electro-hydrodynamic flow and electro-coalescence. We demonstrate that the method is robust and straightforwardly extendable to production of multi-patchy capsules. This forms a starting point for producing patchy colloidosomes with domains of anisotropic chemical surface properties, permeability or mixed liquid-solid phase domains, which could be exploited to produce functional emulsions, light and hollow supra-colloidosome structures, or scaffolds.
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Affiliation(s)
- Zbigniew Rozynek
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Alexander Mikkelsen
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
| | - Paul Dommersnes
- Matière et Systèmes Complexes, Université Paris 7 Diderot, 10, rue Alice Domon et Léonie Duquet, F-75205 Paris, France
- Centre for Advanced Study, Norwegian Academy of Science and Letters, Drammensvegen 78, N-0271 Oslo, Norway
| | - Jon Otto Fossum
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
- Centre for Advanced Study, Norwegian Academy of Science and Letters, Drammensvegen 78, N-0271 Oslo, Norway
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27
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Pujala RK, Bohidar HB. Kinetics of anisotropic ordering in Laponite dispersions induced by a water-air interface. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 88:052310. [PMID: 24329267 DOI: 10.1103/physreve.88.052310] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 09/05/2013] [Indexed: 06/03/2023]
Abstract
In this work, we report the kinetics of ordering occurring at the water-air interface of Laponite dispersions. Propagation of such ordering into the bulk and its relaxation dynamics were systematically studied through light scattering measurements. Depolarization ratio D(p), which accounted for the optical anisotropy, was measured as a function of depth from the interface and aging of the samples. The extent of spatial ordering was found to be several decades larger than the typical particle size. Spatial ordering originated from the interface and percolated into the bulk with aging time t(w). Growth in D(p) with waiting time was found to follow power-law behavior given as D(p)~t(w)(n), with n increasing from 0.1 to 4 as one moved away from the interface into the bulk. D(p) decreased exponentially with depth h given as D(p)~e(-(h/h(0))), where h(0) is the decay length, increasing from 0.4 to 0.75 mm with aging time. Dynamic structure factor measurements performed on the samples at various aging times, depths, and temperatures yielded two distinct relaxation times: one fast mode followed by a slow mode. The fast mode remained invariant while slow mode relaxation time followed an exponential decay with depth. This study indicated that the arrested phase nucleated from the interface and propagated into the bulk, which was not observed when the surface was insulated with a layer of hydrophobic liquid. Dilution of the concentrated samples destroyed the aforesaid ordering and made the dispersion homogeneous implying the ordered state was a glass.
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Affiliation(s)
- Ravi Kumar Pujala
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India
| | - H B Bohidar
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India and Special Center for Nanosciences, Jawaharlal Nehru University, New Delhi-110067, India
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28
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Dommersnes P, Rozynek Z, Mikkelsen A, Castberg R, Kjerstad K, Hersvik K, Otto Fossum J. Active structuring of colloidal armour on liquid drops. Nat Commun 2013; 4:2066. [PMID: 23811716 PMCID: PMC4355650 DOI: 10.1038/ncomms3066] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 05/26/2013] [Indexed: 11/17/2022] Open
Abstract
Adsorption and assembly of colloidal particles at the surface of liquid droplets are at the base of particle-stabilized emulsions and templating. Here we report that electrohydrodynamic and electro-rheological effects in leaky-dielectric liquid drops can be used to structure and dynamically control colloidal particle assemblies at drop surfaces, including electric-field-assisted convective assembly of jammed colloidal 'ribbons', electro-rheological colloidal chains confined to a two-dimensional surface and spinning colloidal domains on that surface. In addition, we demonstrate the size control of 'pupil'-like openings in colloidal shells. We anticipate that electric field manipulation of colloids in leaky dielectrics can lead to new routes of colloidosome assembly and design for 'smart armoured' droplets.
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Affiliation(s)
- Paul Dommersnes
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
- Department of Physics, University of Oslo, PO Box 1048, Blindern, N-0316 Oslo, Norway
- Laboratoire Matière et Systèmes Complexes, Université Paris 7 Diderot, 10, rue Alice Domon et Léonie Duquet, F-75205 Paris, France
- Centre for Advanced Study, Norwegian Academy of Science and Letters, Drammensvegen 78, N-0271 Oslo, Norway
- These authors contributed equally to this work
| | - Zbigniew Rozynek
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
- These authors contributed equally to this work
| | - Alexander Mikkelsen
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
| | - Rene Castberg
- Department of Physics, University of Oslo, PO Box 1048, Blindern, N-0316 Oslo, Norway
| | - Knut Kjerstad
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
| | - Kjetil Hersvik
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
| | - Jon Otto Fossum
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
- Centre for Advanced Study, Norwegian Academy of Science and Letters, Drammensvegen 78, N-0271 Oslo, Norway
- These authors contributed equally to this work
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