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Gan Z, Qi R, Chen B, Yuan G, Liao M. Ultra-fast fabrication of MXene/PVA composite films through glutaraldehyde induced microgel framework. Heliyon 2024; 10:e30714. [PMID: 38779331 PMCID: PMC11110175 DOI: 10.1016/j.heliyon.2024.e30714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/31/2024] [Accepted: 05/02/2024] [Indexed: 05/25/2024] Open
Abstract
In this study, Ti3C2Tx/PVA microgels were assembled through the introduction of glutaraldehyde and PVA into Ti3C2Tx colloids. Subsequently, the microgels underwent vacuum-assisted filtration (VAF) and drying processes to fabricate Ti3C2Tx/PVA self-assembled films (MPGF). This research effectively reduced VAF time by introducing a small amount of glutaraldehyde. The findings demonstrate that glutaraldehyde's chemical crosslinking prompts the formation of temporary microgel frameworks between Ti3C2Tx and PVA, enhancing water molecule transfer during VAF and improving film formation efficiency. Further analysis links VAF time is related to the particle size distribution of the microgels. Adjusting crosslinking and PVA quantity alters microgel crystalline structure and -OH hydrogen bonds, affecting particle size and VAF time. Additionally, films produced via rapid VAF exhibit promising mechanical properties for practical applications.
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Affiliation(s)
- Ziwen Gan
- College of Transportation Engineering, Dalian Maritime University,
Dalian, Liaoning, China
| | - Ranran Qi
- College of Transportation Engineering, Dalian Maritime University,
Dalian, Liaoning, China
| | - Bowen Chen
- College of Transportation Engineering, Dalian Maritime University,
Dalian, Liaoning, China
| | - Gaofei Yuan
- College of Transportation Engineering, Dalian Maritime University,
Dalian, Liaoning, China
| | - Mingyi Liao
- College of Transportation Engineering, Dalian Maritime University,
Dalian, Liaoning, China
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2
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Pickering Emulsions Based in Inorganic Solid Particles: From Product Development to Food Applications. Molecules 2023; 28:molecules28062504. [PMID: 36985475 PMCID: PMC10054141 DOI: 10.3390/molecules28062504] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 03/01/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
Pickering emulsions (PEs) have attracted attention in different fields, such as food, pharmaceuticals and cosmetics, mainly due to their good physical stability. PEs are a promising strategy to develop functional products since the particles’ oil and water phases can act as carriers of active compounds, providing multiple combinations potentiating synergistic effects. Moreover, they can answer the sustainable and green chemistry issues arising from using conventional emulsifier-based systems. In this context, this review focuses on the applicability of safe inorganic solid particles as emulsion stabilisers, discussing the main stabilisation mechanisms of oil–water interfaces. In particular, it provides evidence for hydroxyapatite (HAp) particles as Pickering stabilisers, discussing the latest advances. The main technologies used to produce PEs are also presented. From an industrial perspective, an effort was made to list new productive technologies at the laboratory scale and discuss their feasibility for scale-up. Finally, the advantages and potential applications of PEs in the food industry are also described. Overall, this review gathers recent developments in the formulation, production and properties of food-grade PEs based on safe inorganic solid particles.
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Huang Z, Calicchia E, Jurewicz I, Muñoz E, Garriga R, Portale G, Howlin BJ, Keddie JL. Two-Dimensional Triblock Peptide Assemblies for the Stabilization of Pickering Emulsions with pH Responsiveness. ACS APPLIED MATERIALS & INTERFACES 2022; 14:53228-53240. [PMID: 36378993 PMCID: PMC9716523 DOI: 10.1021/acsami.2c17558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
A variety of two-dimensional (2D) nanomaterials, including graphene oxide and clays, are known to stabilize Pickering emulsions to fabricate structures for functions in sensors, catalysts, and encapsulation. We introduce here a novel Pickering emulsion using self-assembled amphiphilic triblock oligoglycine as the emulsifier. Peptide amphiphiles are more responsive to environmental changes (e.g., pH, temperature, and ionic strength) than inorganic 2D materials, which have a chemically rigid, in-plane structure. Noncovalent forces between the peptide molecules change with the environment, thereby imparting responsiveness. We provide new evidence that the biantennary oligoglycine, Gly4-NH-C10H20-NH-Gly4, self-assembles into 2D platelet structures, denoted as tectomers, in solution at a neutral buffered pH using small-angle X-ray scattering and molecular dynamics simulations. The molecules are stacked in the platelets with a linear conformation, rather than in a U-shape. We discovered that the lamellar oligoglycine platelets adsorbed at an oil/water interface and stabilized oil-in-water emulsions. This is the first report of 2D oligoglycine platelets being used as a Pickering stabilizer. The emulsions showed a strong pH response in an acidic environment. Thus, upon reducing the pH, the protonation of the terminal amino groups of the oligoglycine induced disassembly of the lamellar structure due to repulsive electrostatic forces, leading to emulsion destabilization. To demonstrate the application of the material, we show that a model active ingredient, β-carotene, in the oil is released upon decreasing the pH. Interestingly, in pH 9 buffer, the morphology of the oil droplets evolved over time, as the oligoglycine stabilizer created progressively a thicker interfacial layer. This demonstration opens a new route to use self-assembled synthetic peptide amphiphiles to stabilize Pickering emulsions, which can be significant for biomedical and pharmaceutical applications.
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Affiliation(s)
- Zhiwei Huang
- Department
of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, GuildfordGU2 7XH, U.K.
| | - Eleonora Calicchia
- Groningen
Research Institute of Pharmacy, University
of Groningen, A. Deusinglaan 1, Groningen9713 AV, The Netherlands
- Zernike
Institute for Advanced Materials, Faculty of Mathematics and Natural
Sciences, University of Groningen, Nijenborgh 4, Groningen9747AG, The
Netherlands
| | - Izabela Jurewicz
- Department
of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, GuildfordGU2 7XH, U.K.
| | - Edgar Muñoz
- Instituto
de Carboquímica ICB-CSIC, Miguel Luesma Castán 4, 50018Zaragoza, Spain
| | - Rosa Garriga
- Departamento
de Química Física, Universidad
de Zaragoza, 50009Zaragoza, Spain
| | - Giuseppe Portale
- Zernike
Institute for Advanced Materials, Faculty of Mathematics and Natural
Sciences, University of Groningen, Nijenborgh 4, Groningen9747AG, The
Netherlands
| | - Brendan J. Howlin
- Department
of Chemistry, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, U.K.
| | - Joseph L. Keddie
- Department
of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, GuildfordGU2 7XH, U.K.
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Alberto Arenas-Blanco B, Muñoz-Rugeles L, Cabanzo-Hernández R, Mejía-Ospino E. Molecular Dynamics study of the effect on the interfacial activity of Alkylamine-Modified graphene oxide. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Spontaneous formation of a self-healing carbon nanoskin at the liquid-liquid interface. Nat Commun 2022; 13:4950. [PMID: 35999197 PMCID: PMC9399178 DOI: 10.1038/s41467-022-31277-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 06/13/2022] [Indexed: 11/08/2022] Open
Abstract
Biological membranes exhibit the ability to self-repair and dynamically change their shape while remaining impermeable. Yet, these defining features are difficult to reconcile with mechanical robustness. Here, we report on the spontaneous formation of a carbon nanoskin at the oil-water interface that uniquely combines self-healing attributes with high stiffness. Upon the diffusion-controlled self-assembly of a reactive molecular surfactant at the interface, a solid elastic membrane forms within seconds and evolves into a continuous carbon monolayer with a thickness of a few nanometers. This nanoskin has a stiffness typical for a 2D carbon material with an elastic modulus in bending of more than 40-100 GPa; while brittle, it shows the ability to self-heal upon rupture, can be reversibly reshaped, and sustains complex shapes. We anticipate such an unusual 2D carbon nanomaterial to inspire novel approaches towards the formation of synthetic cells with rigid shells, additive manufacturing of composites, and compartmentalization in industrial catalysis.
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Study of the water-oil interfacial activity of amino-modified graphene oxide. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129034] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Kim H, Park D, Jiang Z, Wei Y, Woong Kim J. Microfluidic macroemulsion stabilization through in situ interfacial coacervation of associative nanoplatelets and polyelectrolytes. J Colloid Interface Sci 2022; 614:574-582. [PMID: 35121516 DOI: 10.1016/j.jcis.2022.01.082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/11/2022] [Accepted: 01/12/2022] [Indexed: 11/24/2022]
Abstract
HYPOTHESIS Since macroemulsions tend to break down to lower free energy, they hardly retain their initial drop state. Therefore, studies are being conducted to overcome this based on advanced interface engineering techniques, but it is still challenging. Herein we hypothesize that the stability of giant droplets can be secured without chemical bonding through the interfacial coacervation of polyelectrolyte and associative nanoplatelets. EXPERIMENTS We synthesized associative silica nanoplates (ASNPs) via polypeptide-templated silicification and consecutive wettability adjustment. To produce monodisperse macrodroplets, the inner fluid containing partially positively charged ASNPs and the outer fluid dissolving negatively charged polyacrylic acid (PAA) were coflowed through a capillary-based microfluidic channel. FINDINGS Dynamic interfacial tension and interfacial rheology measurements revealed that the migration of ASNPs and PAA from each phase to the interface led to the formation of a complex bilayered thin membrane with an enhanced interfacial modulus. In addition, we demonstrated that adjusting the surface properties of ASNPs by coupling a fluorochemical enabled the production of monodisperse fluorocarbon-in-oil-in-water double macroemulsions. These results highlighted the applicability of our microfluidics-based interfacial coacervation technology in the development of complex fluid products with visual differentiation and drug encapsulation.
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Affiliation(s)
- Hajeong Kim
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Daehwan Park
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Zhiting Jiang
- BASF Advanced Chemicals CO., Ltd., Shanghai 200137, China
| | - Ying Wei
- BASF Advanced Chemicals CO., Ltd., Shanghai 200137, China
| | - Jin Woong Kim
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
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A nanosheet-based combination emulsifier system for bulk-scale production of emulsions with elongated droplets and long-term stability. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Kong D, Peng L, Bosch-Fortea M, Chrysanthou A, Alexis CVM, Matellan C, Zarbakhsh A, Mastroianni G, del Rio Hernandez A, Gautrot JE. Impact of the multiscale viscoelasticity of quasi-2D self-assembled protein networks on stem cell expansion at liquid interfaces. Biomaterials 2022; 284:121494. [DOI: 10.1016/j.biomaterials.2022.121494] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/23/2022] [Accepted: 03/28/2022] [Indexed: 11/02/2022]
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11
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Razavi L, Raissi H, Farzad F. Insights into glyphosate removal efficiency using a new 2D nanomaterial. RSC Adv 2022; 12:10154-10161. [PMID: 35424903 PMCID: PMC8968191 DOI: 10.1039/d2ra00385f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 03/23/2022] [Indexed: 12/29/2022] Open
Abstract
Glyphosate (GLY) is a nonselective herbicide that has been widely used in agriculture for weed control. However, there are potential genetic, development and reproduction risks to humans and animals associated with exposure to GLY. Therefore, the removal of this type of environmental pollutants has become a significant challenge. Some of the two-dimensional nanomaterials, due to the characteristics of hydrophilic nature, abundant highly active surficial sites and, large specific surface area are showed high removal efficiency for a wide range of pollutants. The present study focused on the adsorption behavior of GLY on silicene nanosheets (SNS). In order to provide more detailed information about the adsorption mechanism of contaminants on the adsorbent's surface, molecular dynamics (MD) and well-tempered metadynamics simulations are performed. The MD results are demonstrated that the contribution of the L-J term in pollutant/adsorbent interactions is more than coulombic energy. Furthermore, the simulation results demonstrated the lowest total energy value for system-A (with the lowest pollutant concentration), while system-D (contains the highest concentration of GLY) had the most total energy (E tot: -78.96 vs. -448.51 kJ mol-1). The well-tempered metadynamics simulation is accomplished to find the free energy surface of the investigated systems. The free energy calculation for the SNS/GLY system indicates a stable point in which the distance of GLY from the SNS surface is 1.165 nm.
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Affiliation(s)
- Leila Razavi
- Department of Chemistry, University of Birjand Birjand Iran +98 5632502064
| | - Heidar Raissi
- Department of Chemistry, University of Birjand Birjand Iran +98 5632502064
| | - Farzaneh Farzad
- Department of Chemistry, University of Birjand Birjand Iran +98 5632502064
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Ma R, Zeng M, Huang D, Wang Q. Zwitterionic Graphene Quantum Dots to Stabilize Pickering Emulsions for Controlled-Release Applications. ACS APPLIED MATERIALS & INTERFACES 2022; 14:7486-7492. [PMID: 35080854 DOI: 10.1021/acsami.1c23226] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Graphene quantum dots (GQDs) are a subset of the nanocarbon material family, which promise a wide spectrum of applications. Herein, we describe amphiphilic graphene quantum dots with zwitterionic features (ZGQDs), which are able to stabilize the oil/water interface. ZGQDs were fabricated by modifying GQDs with tertiary amine groups and alkyl groups. Moreover, the blocking and unblocking behavior of ZGQDs at the oil/water interface could be tuned by adjusting pH values in the aqueous phase. It would provide a flexible and adjustable method to manipulate interfacial properties of ZGQDs, which enabled a switchable molecular diffusion through a fluid-fluid interface. ZGQDs have shown well-controlled interfacial behavior under different pH conditions, indicating great potential for applications in controlled molecular diffusion based on nanoparticles demonstrated in this work.
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Affiliation(s)
- Rong Ma
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Minxiang Zeng
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Dali Huang
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Qingsheng Wang
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
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13
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Stable dispersion of graphene oxide–copolymer nanocomposite for enhanced oil recovery application in high-temperature offshore reservoirs. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Barison S, Cabaleiro D, Rossi S, Kovtun A, Melucci M, Agresti F. Paraffin–graphene oxide hybrid nano emulsions for thermal management systems. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127132] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Oily Wastewater Treatment: Overview of Conventional and Modern Methods, Challenges, and Future Opportunities. WATER 2021. [DOI: 10.3390/w13070980] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Industrial developments in the oil and gas, petrochemical, pharmaceutical and food sector have contributed to the large production of oily wastewater worldwide. Oily wastewater pollution affects drinking water and groundwater resources, endangers aquatic life and human health, causes atmospheric pollution, and affects crop production. Several traditional and conventional methods were widely reported, and the advantages and limitations were discussed. However, with the technology innovation, new trends of coupling between techniques, use of new materials, optimization of the cleaning process, and multiphysical approach present new paths for improvement. Despite these trends of improvement and the encouraging laboratory results of modern and green methods, many challenges remain to be raised, particularly the commercialization and the global aspect of these solutions and the reliability to reduce the system’s maintenance and operational cost. In this review, the well-known oily wastewater cleaning methods and approaches are being highlighted, and the obstacles faced in the practical use of these technologies are discussed. A critical review on the technologies and future direction as the road to commercialization is also presented to persevere water resources for the benefit of mankind and all living things.
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16
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Biomolecule-based pickering food emulsions: Intrinsic components of food matrix, recent trends and prospects. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106303] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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17
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Assembly and mechanical response of amphiphilic Janus nanosheets at oil-water interfaces. J Colloid Interface Sci 2021; 583:214-221. [DOI: 10.1016/j.jcis.2020.09.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/03/2020] [Accepted: 09/04/2020] [Indexed: 01/11/2023]
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Interfacial jamming reinforced Pickering emulgel for arbitrary architected nanocomposite with connected nanomaterial matrix. Nat Commun 2021; 12:111. [PMID: 33397908 PMCID: PMC7782697 DOI: 10.1038/s41467-020-20299-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 11/24/2020] [Indexed: 11/28/2022] Open
Abstract
Three-dimensional (3D) nanocomposite (NC) printing has emerged as a major approach to translate nanomaterial physical properties to 3D geometries. However, 3D printing of conventional NCs with polymer matrix lacks control over nanomaterial connection that facilitates maximizing nanomaterial advantages. Thus, a printable NC that features nanomaterials matrix necessitates development, nevertheless, faces a challenge in preparation because of the trade-off between viscosity and interfacial stability. Here, we develop viscoelastic Pickering emulgels as NC inks through jamming nanomaterials on interfaces and in continuous phase. Emulgel composed of multiphases allow a vast range of composition options and superior printability. The excellent attributes initiate NC with spatial control over geometrics and functions through 3D printing of graphene oxide/phase-change materials emulgel, for instance. This versatile approach provides the means for architecting NCs with nanomaterial continuous phase whose performance does not constrain the vast array of available nanomaterials and allows for arbitrary hybridization and patterns. Nanocomposite (NC) printing emerged as a major approach to translate nanomaterial properties to 3D geometries but printing of conventional NCs lacks control over nanomaterial connection. Here, the authors develop viscoelastic Pickering emulgels as NC inks through jamming nanomaterials on interfaces and in continuous phase
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Creighton MA, Yuen MC, Morris NJ, Tabor CE. Graphene-based encapsulation of liquid metal particles. NANOSCALE 2020; 12:23995-24005. [PMID: 33104147 DOI: 10.1039/d0nr05263a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Liquid metals are a promising functional material due to their unique combination of metallic properties and fluidity at room temperature. They are of interest in wide-ranging fields including stretchable and flexible electronics, reconfigurable devices, microfluidics, biomedicine, material synthesis, and catalysis. Transformation of bulk liquid metal into particles has enabled further advances by allowing access to a broader palette of fabrication techniques for device manufacture or by increasing area available for surface-based applications. For gallium-based liquid metal alloys, particle stabilization is typically achieved by the oxide that forms spontaneously on the surface, even when only trace amounts of oxygen are present. The utility of the particles formed is governed by the chemical, electrical, and mechanical properties of this oxide. To overcome some of the intrinsic limitations of the native oxide, it is demonstrated here for the first time that 2D graphene-based materials can encapsulate liquid metal particles during fabrication and imbue them with previously unattainable properties. This outer encapsulation layer is used to physically stabilize particles in a broad range of pH environments, modify the particles' mechanical behavior, and control the electrical behavior of resulting films. This demonstration of graphene-based encapsulation of liquid metal particles represents a first foray into the creation of a suite of hybridized 2D material coated liquid metal particles.
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Affiliation(s)
- Megan A Creighton
- Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, OH, USA.
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20
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Chen XW, Sun SD, Ma CG, Yang XQ. Oil-Water Interfacial-Directed Spontaneous Self-Assembly of Natural Quillaja Saponin for Controlling Interface Permeability in Colloidal Emulsions. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:13854-13862. [PMID: 33166459 DOI: 10.1021/acs.jafc.0c04431] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Assembly of amphiphiles at the interface of two immiscible fluids is of great scientific and technological interest in offering efficient routes to smart vehicles for functional deliveries. Natural Quillaja saponin (QS) has gathered widespread interest within the scientific community as a result of its unique interfacial properties. Herein, spontaneously interface-driven self-assembly (SIDSA) of QS at the oil-water interface was systematically studied by morphology and spectroscopy. It was found to self-assemble into a micrometer-scale network in helical fibers by combined intermolecular π-π stacking and hydrogen bonding among saponins at the liquid-liquid interface. From SIDSA, multilayer films on the surfaces of dispersed droplets were formed and enhanced emulsion stability. Interfacial QS-based films on droplet surfaces were also shown to confine interfacial diffusion processes by serving as transport barriers. Furthermore, they can be exploited to control the release of volatiles from the dispersed liquid phase by regulating the interface film, which is shown by molecular dynamics to occur through a hydrogen-bonded mechanism. These results provide new insight into the interfacial assembly structure that can enable unique controllable release in a broad range of applications in food, beverages, pharmaceuticals, and cosmetics.
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Affiliation(s)
- Xiao-Wei Chen
- Lipid Technology and Engineering, College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, PR China
- Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Shang-De Sun
- Lipid Technology and Engineering, College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Chuan-Guo Ma
- Lipid Technology and Engineering, College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Xiao-Quan Yang
- Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
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PolyHIPE foams from pristine graphene: Strong, porous, and electrically conductive materials templated by a 2D surfactant. J Colloid Interface Sci 2020; 580:700-708. [PMID: 32712476 DOI: 10.1016/j.jcis.2020.07.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 11/20/2022]
Abstract
Graphene is attractive as a functional 2D surfactant for polymerized high internal phase emulsions (polyHIPEs) due to its remarkable mechanical and electrical properties. We have developed polyHIPEs stabilized by pristine, unoxidized graphene via the spontaneous exfoliation of graphite at high-energy aqueous/organic interfaces. The exfoliated graphene self-assembles into a percolating network and incorporates into the polyHIPE cell walls as verified by TEM. The resulting composites showed compressive strengths of 7.0 MPa at densities of 0.22 g/cm3 and conductivities up to 0.36 S/m. Systematically reducing the concentration of monomer in the oil phase by dilution with a porogenic-acting solvent increased the porosity and lowered the density of the polyHIPEs. Characterization of these composites indicated that graphene's high compressive strength and modulus was transferred to the polyHIPEs and provided mechanical reinforcement even at low polymer content. SEM showed that the morphology of the polymer changed with decreasing monomer content while the graphene lined cells retained their shape. Moreover, we show that the polyHIPEs contain a continuous graphene percolating network resulting in electrically conductive materials at low graphene loading.
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Mayr L, Breu J. Encapsulation of Fragrance in Aqueous Emulsions by Delaminated Synthetic Hectorite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11061-11067. [PMID: 32882135 DOI: 10.1021/acs.langmuir.0c02025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Fragrance emulsions are used in many applications in daily life. Since a lot of fragrances are quite volatile substances, their release rate from emulsions is a crucial factor. Since in most cases a mixture of fragrances is applied, the olfactory impression might change over time if the release rates of individual components differ significantly. For such applications, encapsulation with barrier materials is sought to retard release in an unselective manner. Stable fragrance-in-water emulsions were made by applying a synthetic hectorite as Pickering emulsifier which was fixed as a multilayer stack at the oil-water interface by adding poly(ethylene imine). The release of different fragrance molecules (eucalyptol, limonene, α-pinene, and ethyl-2-methylbutyrate) from these emulsions was studied as the ratio between hectorite and poly(ethylene imine) was varied. While the release rates of all fragrances were retarded by the hybrid capsule acting as a nonselective barrier, the relative release was determined by the solubility of individual fragrances in the capsule material. Fragrance release could be further reduced by additional chemical cross-linking of poly(ethylene imine).
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Affiliation(s)
- Lina Mayr
- 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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Lyu R, Xia T, Liang C, Zhang C, Li Z, Wang L, Wang Y, Wu M, Luo X, Ma J, Wang C, Xu C. MPEG grafted alkylated carboxymethyl chitosan as a high-efficiency demulsifier for O/W crude oil emulsions. Carbohydr Polym 2020; 241:116309. [DOI: 10.1016/j.carbpol.2020.116309] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 04/04/2020] [Accepted: 04/13/2020] [Indexed: 10/24/2022]
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24
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Huang D, Xu H, Jacob B, Ma R, Yuan S, Zhang L, Mannan MS, Cheng Z. Microwave-assisted preparation of two-dimensional amphiphilic nanoplate herding surfactants for offshore oil spill treatment. J Loss Prev Process Ind 2020. [DOI: 10.1016/j.jlp.2020.104213] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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Qu M, Hou J, Liang T, Xiao L, Yang J, Raj I, Shao Y. Preparation and Interfacial Properties of Ultralow Concentrations of Amphiphilic Molybdenum Disulfide Nanosheets. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00217] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ming Qu
- China University of Petroleum-Beijing, Changping, Beijing 102249, P. R. China
| | - Jirui Hou
- China University of Petroleum-Beijing, Changping, Beijing 102249, P. R. China
| | - Tuo Liang
- China University of Petroleum-Beijing, Changping, Beijing 102249, P. R. China
| | - Lixiao Xiao
- China University of Petroleum-Beijing, Changping, Beijing 102249, P. R. China
| | - Jingbin Yang
- China University of Petroleum-Beijing, Changping, Beijing 102249, P. R. China
| | - Infant Raj
- China University of Petroleum-Beijing, Changping, Beijing 102249, P. R. China
- Harvard SEAS-CUPB Joint Laboratory on Petroleum Science, 29 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Yuchen Shao
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
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26
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Lee JY, Choi KH, Hwang J, Sung M, Kim JE, Park BJ, Kim JW. Janus amphiphilic nanoplatelets as smart colloid surfactants with complementary face-to-face interactions. Chem Commun (Camb) 2020; 56:6031-6034. [DOI: 10.1039/d0cc02231d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new type of colloidal surfactant that not only has a nanoscale platelet geometry, but can also induce complementary face-to-face interactions among Pickering emulsion droplets is introduced.
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Affiliation(s)
- Jin Yong Lee
- Department of Bionano Technology, Hanyang University
- Ansan
- Republic of Korea
| | - Kyu Hwan Choi
- Department of Chemical Engineering
- Kyung Hee University
- Yongin
- Republic of Korea
| | - Jaemin Hwang
- School of Chemical Engineering, Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Minchul Sung
- School of Chemical Engineering, Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Ji Eun Kim
- Department of Bionano Technology, Hanyang University
- Ansan
- Republic of Korea
| | - Bum Jun Park
- Department of Chemical Engineering
- Kyung Hee University
- Yongin
- Republic of Korea
| | - Jin Woong Kim
- School of Chemical Engineering, Sungkyunkwan University
- Suwon
- Republic of Korea
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27
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Yu T, Swientoniewski LT, Omarova M, Li MC, Negulescu II, Jiang N, Darvish OA, Panchal A, Blake DA, Wu Q, Lvov YM, John VT, Zhang D. Investigation of Amphiphilic Polypeptoid-Functionalized Halloysite Nanotubes as Emulsion Stabilizer for Oil Spill Remediation. ACS APPLIED MATERIALS & INTERFACES 2019; 11:27944-27953. [PMID: 31306577 DOI: 10.1021/acsami.9b08623] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Halloysite nanotubes (HNTs), naturally occurring and environmental benign clay nanoparticles, have been successfully functionalized with amphiphilic polypeptoid polymers by surface-initiated polymerization methods and investigated as emulsion stabilizers toward oil spill remediation. The hydrophilicity and lipophilicity balance (HLB) of the grafted polypeptoids was shown to affect the wettability of functionalized HNTs and their performance as stabilizers for oil-in-water emulsions. The functionalized HNTs having relatively high hydrophobic content (HLB = 12.0-15.0) afforded the most stable oil-in-water emulsions containing the smallest oil droplet sizes. This has been attributed to the augmented interfacial activities of polypeptoid-functionalized HNTs, resulting in more effective reduction of interfacial tension, enhancement of thermodynamic propensity of the HNT particles to partition at the oil-water interface, and increased emulsion viscosity relative to the pristine HNTs. Cell culture studies have revealed that polypeptoid-functionalized HNTs are noncytotoxic toward Alcanivorax borkumensis, a dominant alkane degrading bacterium found in the ocean after oil spill. Notably, the functionalized HNTs with higher hydrophobic polypeptoid content (HLB = 12.0-14.3) were shown to induce more cell proliferation than either pristine HNTs or those functionalized with less hydrophobic polypeptoids. It was postulated that the functionalized HNTs with higher hydrophobic polypeptoid content may promote the bacterial proliferation by providing larger oil-water interfacial area and better anchoring of bacteria at the interface.
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Affiliation(s)
| | - Lauren T Swientoniewski
- Department of Biochemistry and Molecular Biology , Tulane University School of Medicine , New Orleans , Louisiana 70112 , United States
| | - Marzhana Omarova
- Department of Chemical and Biomolecular Engineering , Tulane University , New Orleans , Louisiana 70118 , United States
| | - Mei-Chun Li
- School of Renewable Natural Resources , Louisiana State University Agricultural Center , Baton Rouge , Louisiana 70803 , United States
| | | | | | | | - Abhishek Panchal
- Institute for Micromanufacturing , Louisiana Tech University , Ruston , Louisiana 71272 , United States
| | - Diane A Blake
- Department of Biochemistry and Molecular Biology , Tulane University School of Medicine , New Orleans , Louisiana 70112 , United States
| | - Qinglin Wu
- School of Renewable Natural Resources , Louisiana State University Agricultural Center , Baton Rouge , Louisiana 70803 , United States
| | - Yuri M Lvov
- Institute for Micromanufacturing , Louisiana Tech University , Ruston , Louisiana 71272 , United States
| | - Vijay T John
- Department of Chemical and Biomolecular Engineering , Tulane University , New Orleans , Louisiana 70118 , United States
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28
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Zhao Q, Yang W, Zhang H, He F, Yan H, He R, Zhang K, Fan J. Graphene oxide Pickering phase change material emulsions with high thermal conductivity and photo-thermal performance for thermal energy management. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.05.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Thickett SC, Hamilton E, Yogeswaran G, Zetterlund PB, Farrugia BL, Lord MS. Enhanced Osteogenic Differentiation of Human Fetal Cartilage Rudiment Cells on Graphene Oxide-PLGA Hybrid Microparticles. J Funct Biomater 2019; 10:E33. [PMID: 31366056 PMCID: PMC6787757 DOI: 10.3390/jfb10030033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/15/2019] [Accepted: 07/25/2019] [Indexed: 11/16/2022] Open
Abstract
Poly(d,l-lactide-co-glycolide) (PLGA) has been extensively explored for bone regeneration applications; however, its clinical use is limited by low osteointegration. Therefore, approaches that incorporate osteoconductive molecules are of great interest. Graphene oxide (GO) is gaining popularity for biomedical applications due to its ability to bind biological molecules and present them for enhanced bioactivity. This study reports the preparation of PLGA microparticles via Pickering emulsification using GO as the sole surfactant, which resulted in hybrid microparticles in the size range of 1.1 to 2.4 µm based on the ratio of GO to PLGA in the reaction. Furthermore, this study demonstrated that the hybrid GO-PLGA microparticles were not cytotoxic to either primary human fetal cartilage rudiment cells or the human osteoblast-like cell line, Saos-2. Additionally, the GO-PLGA microparticles promoted the osteogenic differentiation of the human fetal cartilage rudiment cells in the absence of exogenous growth factors to a greater extent than PLGA alone. These findings demonstrate that GO-PLGA microparticles are cytocompatible, osteoinductive and have potential as substrates for bone tissue engineering.
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Affiliation(s)
- Stuart C Thickett
- School of Natural Sciences (Chemistry), University of Tasmania, Hobart, TAS 7001, Australia.
| | - Ella Hamilton
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Gokulan Yogeswaran
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Per B Zetterlund
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Brooke L Farrugia
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Megan S Lord
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia.
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31
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Mo S, Pan T, Wu F, Zeng M, Huang D, Zhang L, Jia L, Chen Y, Cheng Z. Facile one-step microwave-assisted modification of kaolinite and performance evaluation of pickering emulsion stabilization for oil recovery application. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 238:257-262. [PMID: 30852402 DOI: 10.1016/j.jenvman.2019.03.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 02/18/2019] [Accepted: 03/02/2019] [Indexed: 06/09/2023]
Abstract
A facile one-step microwave-assisted method was proposed for kaolinite intercalation and grafting. The structure, morphology, composition, and size distribution of kaolinite sheets were investigated using various methods, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric (TG) analysis. The potential application of the modified kaolinite as an oil/water emulsion stabilizer was studied. The results verified that intact kaolinite sheets were obtained. The dodecane/water emulsion stabilized by the modified kaolinite remained stable for more than 60 days. The effective performance suggests that the effectiveness of the proposed kaolinite modification method may be useful for Pickering emulsion stabilization in oil recovery applications.
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Affiliation(s)
- Songping Mo
- Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China; Artie McFerrin Department of Chemical Engineering, Texas A &M University, College Station, TX, 77843-3122, USA
| | - Ting Pan
- Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China
| | - Fan Wu
- Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China
| | - Minxiang Zeng
- Artie McFerrin Department of Chemical Engineering, Texas A &M University, College Station, TX, 77843-3122, USA
| | - Dali Huang
- Artie McFerrin Department of Chemical Engineering, Texas A &M University, College Station, TX, 77843-3122, USA
| | - Lecheng Zhang
- Artie McFerrin Department of Chemical Engineering, Texas A &M University, College Station, TX, 77843-3122, USA
| | - Lisi Jia
- Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China
| | - Ying Chen
- Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Zhengdong Cheng
- Artie McFerrin Department of Chemical Engineering, Texas A &M University, College Station, TX, 77843-3122, USA.
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Gamot TD, Bhattacharyya AR, Sridhar T, Fulcher AJ, Beach F, Tabor RF, Majumder M. Enhanced Thermal Conductivity of High Internal Phase Emulsions with Ultra-Low Volume Fraction of Graphene Oxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2738-2746. [PMID: 30652872 DOI: 10.1021/acs.langmuir.8b04116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Thermal conductivity enhancement in a multiphase fluid such as water-in-oil emulsion can substantially improve efficacies in a broad range of applications. However, nanoparticle additives that are often used to do so can catastrophically destabilize a delicate emulsion system, in our case, a high internal phase emulsion (HIPE), whereas large concentration of additives can adversely impact practical processing aspects. Therefore, means to enhance the thermal conductivity of emulsions with a minute concentration of additives (<1 wt %) is a major scientific challenge. We report the enhancement in thermal conductivity of HIPE, by consigning either lipophilic GO (fGO) in the oil phase or hydrophilic GO in the water phase in combination with a well-known emulsifier. The rheological properties of fGO-HIPE showed non-Newtonian viscoelastic behavior similar to that of the original emulsion but with lower elastic modulus and viscosity, indicating that GO incorporation has enhanced processability. The thermal conductivity enhancements can be predicted by thermal circuit models, and the HIPEs with fGO and GO demonstrated 21 and 13% enhancements over the parent emulsion with a minor 0.1 w/w addition, respectively. A possible role of ordered colloidal structures of GO and fGO underlining this prepercolation behavior is inferred from comprehensive imaging and thermal studies.
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Affiliation(s)
| | | | | | | | - Fiona Beach
- Orica Mining Services , George Booth Drive , Kurri Kurri , New South Wales 2327 , Australia
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33
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McCoy TM, Turpin G, Teo BM, Tabor RF. Graphene oxide: a surfactant or particle? Curr Opin Colloid Interface Sci 2019. [DOI: 10.1016/j.cocis.2019.01.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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34
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Pickering emulsions stabilized with two-dimensional (2D) materials: A comparative study. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.12.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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35
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Zhang L, Lei Q, Luo J, Zeng M, Wang L, Huang D, Wang X, Mannan S, Peng B, Cheng Z. Natural Halloysites-Based Janus Platelet Surfactants for the Formation of Pickering Emulsion and Enhanced Oil Recovery. Sci Rep 2019; 9:163. [PMID: 30655562 PMCID: PMC6336865 DOI: 10.1038/s41598-018-36352-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 11/05/2018] [Indexed: 11/23/2022] Open
Abstract
Janus colloidal surfactants with opposing wettabilities are receiving attention for their practical application in industry. Combining the advantages of molecular surfactants and particle-stabilized Pickering emulsions, Janus colloidal surfactants generate remarkably stable emulsions. Here we report a straightforward and cost-efficient strategy to develop Janus nanoplate surfactants (JNPS) from an aluminosilicate nanoclay, halloysite, by stepwise surface modification, including an innovative selective surface modification step. Such colloidal surfactants are found to be able to stabilize Pickering emulsions of different oil/water systems. The microstructural characterization of solidified polystyrene emulsions indicates that the emulsion interface is evenly covered by JNPS. The phase behaviors of water/oil emulsion generated by these novel platelet surfactants were also investigated. Furthermore, we demonstrate the application of JNPS for enhanced oil recovery with a microfluidic flooding test, showing a dramatic increase of oil recovery ratio. This research provides important insights for the design and synthesis of two-dimensional Janus colloidal surfactants, which could be utilized in biomedical, food and mining industries, especially for circumstances where high salinity and high temperature are involved.
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Affiliation(s)
- Lecheng Zhang
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843-3122, USA.,Mary Kay O'Connor Process Safety Center, Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843-3122, USA
| | - Qun Lei
- Research Institute of Petroleum Exploration & Development (RIPED), PetroChina, Beijing, 100083, China
| | - Jianhui Luo
- Research Institute of Petroleum Exploration & Development (RIPED), PetroChina, Beijing, 100083, China.,Key Laboratory of Nano Chemistry (KLNC), CNPC, Beijing, 100083, China
| | - Minxiang Zeng
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843-3122, USA
| | - Ling Wang
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843-3122, USA
| | - Dali Huang
- Department of Materials Science & Engineering, Texas A&M University, College Station, TX, 77843-3003, USA
| | - Xuezhen Wang
- Mary Kay O'Connor Process Safety Center, Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843-3122, USA
| | - Sam Mannan
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843-3122, USA.,Mary Kay O'Connor Process Safety Center, Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843-3122, USA
| | - Baoliang Peng
- Research Institute of Petroleum Exploration & Development (RIPED), PetroChina, Beijing, 100083, China. .,Key Laboratory of Nano Chemistry (KLNC), CNPC, Beijing, 100083, China.
| | - Zhengdong Cheng
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843-3122, USA. .,Mary Kay O'Connor Process Safety Center, Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843-3122, USA. .,Department of Materials Science & Engineering, Texas A&M University, College Station, TX, 77843-3003, USA.
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36
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Self-assembling GO/modified HEC hybrid stabilized pickering emulsions and template polymerization for biomedical hydrogels. Carbohydr Polym 2018; 207:694-703. [PMID: 30600055 DOI: 10.1016/j.carbpol.2018.12.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 11/29/2018] [Accepted: 12/12/2018] [Indexed: 02/02/2023]
Abstract
Graphene oxide(GO), as an amphiphilic and biocompatible material, is often used to prepare Pickering emulsion. However, the preparation of stable Pickering emulsion by a low concentration of GO is very challenging. In this research, we prepared the hydrophobic modified hydroxyethyl cellulose (mHEC) which contained quaternary ammonium group and GO which the water contact angle was 84°-86°. A stable, low cost, and biocompatible Pickering emulsion was fabricated by a low concentration of GO and different contents of mHEC. The effects of mHEC concentration, electrolyte concentration, pH, and oil/water ratio on the stability of Pickering emulsion were investigated. What's more, we prepared the biomedical macroporous polyacrylamide hydrogel by the GO/mHEC composite stabilized emulsion template for drug controlled-release. The composite hydrogel by Pickering emulsion template is a potential drug controlled-release delivery platforms. Furthermore, our strategy is extremely versatile, as Pickering particles, polymer and the monomer of hydrogel can all be varied.
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37
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Luo Q, Wang Y, Yoo E, Wei P, Pentzer E. Ionic Liquid-Containing Pickering Emulsions Stabilized by Graphene Oxide-Based Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10114-10122. [PMID: 30060669 DOI: 10.1021/acs.langmuir.8b02011] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Emulsions stabilized by particles (i.e., Pickering emulsions) are complementary to those stabilized by small molecules or polymers and most commonly consist of oil droplets dispersed in a continuous water phase, with particles assembled at the fluid-fluid interface. New particle surfactants and different fluid-fluid interfaces are critical for developing next-generation systems for a number of advanced applications. Herein we report the preparation of IL-containing emulsions stabilized by graphene oxide (GO)-based nanoparticles using the IL [Bmim][PF6]: GO nanosheets stabilize IL-in-water emulsions, and alkylated GO nanosheets (C18-GO) stabilize IL-in-oil emulsions. The impact of particle concentration, fluid-fluid ratio, and addition of acid or base on emulsion formation and stability is studied, with distinct effects for the water and oil systems observed. We then illustrate the broad applicability of GO-based particle surfactants by preparing emulsions with different ILs and preparing inverted emulsions (water-in-IL and oil-in-IL emulsions). The latter systems were accessed by tuning the polarity of GO nanosheets by functionalization with a perfluorinated alkyl chain such that they were dispersible in IL. This work provides insight into the preparation of different IL-containing emulsions and lays a foundation for the architecture of dissimilar materials into composite systems.
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Affiliation(s)
- Qinmo Luo
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
| | - Yifei Wang
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
| | - Esther Yoo
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
| | - Peiran Wei
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
| | - Emily Pentzer
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
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38
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Wei P, Luo Q, Edgehouse KJ, Hemmingsen CM, Rodier BJ, Pentzer EB. 2D Particles at Fluid-Fluid Interfaces: Assembly and Templating of Hybrid Structures for Advanced Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:21765-21781. [PMID: 29897230 DOI: 10.1021/acsami.8b07178] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Fluid-fluid interfaces have widespread applications in personal care products, the food industry, oil recovery, mineral processes, etc. and are also important and versatile platforms for generating advanced materials. In Pickering emulsions, particles stabilize the fluid-fluid interface, and their presence reduces the interfacial energy between the two fluids. To date, most Pickering emulsions stabilized by 2D particles make use of clay platelets or GO nanosheets. These systems have been used to template higher order hybrid, functional materials, most commonly, armored polymer particles, capsules, and Janus nanosheets. This review discusses the experimental and computational study of the assembly of sheet-like 2D particles at fluid-fluid interfaces, with an emphasis on the impact of chemical composition, and the use of these assemblies to prepare composite structures of dissimilar materials. The review culminates in a perspective on the future of Pickering emulsions using 2D particle surfactants, including new chemical modification and types of particles as well as the realization of properties and applications not possible with currently accessible systems, such as lubricants, porous structures, delivery, coatings, etc.
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Affiliation(s)
- Peiran Wei
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
| | - Qinmo Luo
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
| | - Katelynn J Edgehouse
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
| | - Christina M Hemmingsen
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
| | - Bradley J Rodier
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
| | - Emily B Pentzer
- Department of Chemistry , Case Western Reserve University , 10900 Euclid Avenue , Cleveland , Ohio 44106 , United States
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39
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Ermakova EV, Ezhov AA, Baranchikov AE, Gorbunova YG, Kalinina MA, Arslanov VV. Interfacial self-assembly of functional bilayer templates comprising porphyrin arrays and graphene oxide. J Colloid Interface Sci 2018; 530:521-531. [PMID: 29990788 DOI: 10.1016/j.jcis.2018.06.086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/23/2018] [Accepted: 06/26/2018] [Indexed: 01/27/2023]
Abstract
Fabricating of solid-supported hybrid nanostructures remains a challenging problem because it is difficult to control all interfacial interactions influencing the structure and stability of these systems. The most widely used approach to solving this problem is a bottom-up assembly on the surface templates such as self-assembled monolayers (SAMs). Herein we suggest an alternative approach to tailoring solid surfaces by a formation of an interlayer anchoring the nanostructured film to the solid substrate. We formed a multifunctional bilayer template (MBT), comprising an adhesive monolayer of graphene oxide and a functional ordered monolayer of metal organic compound (Zinc-tetra(4-pyridyl)porphyrin) directing further bottom-up growth of the nanostructures. The one-step assembly of MBT proceeded spontaneously at the air/water interface and was monitored by an in-situ fiber optic absorption and fluorescence spectroscopy in a Langmuir trough. Dilatation surface rheology was applied to study the evolution of molecular organization of the monolayers upon adding the zinc ions, GO and their mixture into the subphase. The MBT templates were used for the assembly of porphyrin-based SURMOFs with two different structures. Our strategy makes it possible to assemble surface-anchored nanostructures avoiding the use of SAMs and it can be extended to other types of ultrathin hybrid systems.
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Affiliation(s)
- Elizaveta V Ermakova
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Pr. 31, Moscow 119071, Russia
| | - Alexander A Ezhov
- Faculty of Physics, M. V. Lomonosov Moscow State University, Leninskiye Gory 1-2, GSP-1, Moscow 119991, Russia; A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Pr. 29, Moscow 119991, Russia
| | - Alexander E Baranchikov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Pr. 31, Moscow 119991, Russia
| | - Yuliya G Gorbunova
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Pr. 31, Moscow 119071, Russia; Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Pr. 31, Moscow 119991, Russia
| | - Maria A Kalinina
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Pr. 31, Moscow 119071, Russia
| | - Vladimir V Arslanov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Pr. 31, Moscow 119071, Russia.
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Abbasi A, Bothun GD, Bose A. Attachment of Alcanivorax borkumensis to Hexadecane-In-Artificial Sea Water Emulsion Droplets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5352-5357. [PMID: 29656641 DOI: 10.1021/acs.langmuir.8b00082] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Alcanivorax borkumensis (AB) is a marine bacterium that dominates bacterial communities around many oil spills because it enzymatically degrades the oil while using it as a nutrient source. Several dispersants have been used to produce oil-in-water emulsions following a spill. Compared to surface slicks, the additional oil-water surface area produced by emulsification provides greater access to the oil and accelerates its degradation. We deliberately cultured AB cells using hexadecane as the only nutrient source. We then examined the first critical step of the biodegradation process, the attachment of these AB cells to hexadecane-water interfaces, using fluorescence microscopy and cryogenic scanning electron microscopy. The hexadecane-in-artificial sea water (ASW) emulsions were produced by gentle shaking and were stabilized either by AB alone, by Corexit 9500, by Tween 20, or by carbon black particles. When no dispersants were used, AB stabilizes the emulsion, and bacterial cells attach to the hexadecane droplets within the first 3 days. When Corexit 9500 was used as the dispersant, AB did not attach to the hexadecane droplets over 3 days, and many AB cells in the aqueous phase appeared dead. Only limited attachment was observed after 7 days. No AB attachment was observed over 3 days when Tween 20 was used as the dispersant. However, the bacteria used Tween 20 in the ASW as a nutrient. Large amounts of AB attached to carbon black stabilized hexadecane droplets within 3 days. An analysis that accounts for van der Waals and electrostatic interactions is unable to predict all of these observations, indicating that the attachment of AB to the hexadecane is a complex phenomenon that goes beyond simple physiochemical effects. While these experiments do not mimic conditions in the open ocean where the large amount of water dilutes any emulsion stabilizer, they provide important insights on bacteria adhesion to oil, a critical step in the oil degradation process following a marine spill.
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Affiliation(s)
- Akram Abbasi
- Department of Chemical Engineering , University of Rhode Island , Kingston , Rhode Island 02881 , United States
| | - Geoffrey D Bothun
- Department of Chemical Engineering , University of Rhode Island , Kingston , Rhode Island 02881 , United States
| | - Arijit Bose
- Department of Chemical Engineering , University of Rhode Island , Kingston , Rhode Island 02881 , United States
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41
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Wang B, Xiao N, Pan C, Shi Y, Hui F, Jing X, Zhu K, Guo B, Villena MA, Miranda E, Lanza M. Experimental Observation and Mitigation of Dielectric Screening in Hexagonal Boron Nitride Based Resistive Switching Devices. CRYSTAL RESEARCH AND TECHNOLOGY 2018. [DOI: 10.1002/crat.201800006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bingru Wang
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
| | - Na Xiao
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
| | - Chengbin Pan
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
| | - Yuanyuan Shi
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
| | - Fei Hui
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
| | - Xu Jing
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
| | - Kaichen Zhu
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
| | - Biyu Guo
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
| | - Marco A. Villena
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
| | - Enrique Miranda
- Electronic Engineering Department; Universitat Autonoma de Barcelona; 08193 Cerdanyola del Vallés Spain
| | - Mario Lanza
- Institute of Functional Nano & Soft Materials; Collaborative Innovation Center of Suzhou Nano Science & Technology; Soochow University; Suzhou 215123 China
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42
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Miyazaki H, Inasawa S. Drying kinetics of water droplets stabilized by surfactant molecules or solid particles in a thin non-volatile oil layer. SOFT MATTER 2017; 13:8990-8998. [PMID: 29160885 DOI: 10.1039/c7sm01989k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We have investigated drying of water droplets stabilized by solid particles or surfactant molecules in a thin oil layer. The surfactant-stabilized droplets isotropically shrink, whereas the droplets stabilized by spherical particles severely deform during drying because of buckling of the particulate shells. However, buckling of the shells hardly affects droplet drying. The drying times for complete evaporation are almost the same for water droplets with the same initial diameter and the drying time is independent of the type of surface stabilizer (particles or surfactant). The drying kinetics of the water droplets is well described by mathematical models, in which diffusion of water molecules in the oil phase to the oil-air interface is proposed as the rate-determining process. Droplets with a diameter comparable with the thickness of the oil layer shrink faster than small droplets because of the short diffusion length from the water droplets to the oil-air interface. We also investigated drying of water droplets stabilized by plate-like mica particles. The droplets also buckled but larger shells of mica particles remained compared with those of spherical particles. In addition, a longer drying time is necessary for some droplets stabilized by mica particles. These results indicate the possible effect of the particle morphology on the buckling and drying kinetics of particle-stabilized water droplets.
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Affiliation(s)
- Hayato Miyazaki
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan.
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43
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Gonzalez Ortiz D, Pochat-Bohatier C, Cambedouzou J, Balme S, Bechelany M, Miele P. Inverse Pickering Emulsion Stabilized by Exfoliated Hexagonal-Boron Nitride (h-BN). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:13394-13400. [PMID: 29087719 DOI: 10.1021/acs.langmuir.7b03324] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The formation of inverse Pickering emulsions using exfoliated hexagonal boron nitride (h-BN) as an effective particulate stabilizer without using any surfactants is reported for the first time. The stability and the type of h-BN Pickering emulsions formulated with different BN concentrations and by varying oil/water (o/w) ratios are studied and discussed. First the emulsion structure is analyzed microscopically through optical and epifluorescence microscopy and macroscopically by the study of the rheological behavior. The average droplet size decreases with h-BN concentration whereas the emulsions achieve good stability at 2 wt % BN concentrations and for a 1:1 o/w ratio. In all formulations, the emulsions are of water-in-oil (w/o) type due mainly to the hydrophobicity of h-BN.
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Affiliation(s)
- Danae Gonzalez Ortiz
- Institut Européen des Membranes, IEM UMR-5635, ENSCM, CNRS, Université de Montpellier , Place Eugene Bataillon, 34095 Montpellier, France
| | - Céline Pochat-Bohatier
- Institut Européen des Membranes, IEM UMR-5635, ENSCM, CNRS, Université de Montpellier , Place Eugene Bataillon, 34095 Montpellier, France
| | - Julien Cambedouzou
- Institut de Chimie Séparative de Marcoule, UMR 5257 CEA CNRS ENSCM, Université de Montpellier , BP17171, F-30207 Bagnols sur Ceze Cedex, France
| | - Sébastien Balme
- Institut Européen des Membranes, IEM UMR-5635, ENSCM, CNRS, Université de Montpellier , Place Eugene Bataillon, 34095 Montpellier, France
| | - Mikhael Bechelany
- Institut Européen des Membranes, IEM UMR-5635, ENSCM, CNRS, Université de Montpellier , Place Eugene Bataillon, 34095 Montpellier, France
| | - Philippe Miele
- Institut Européen des Membranes, IEM UMR-5635, ENSCM, CNRS, Université de Montpellier , Place Eugene Bataillon, 34095 Montpellier, France
- Institut Universitaire de France (IUF)
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44
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Gamot TD, Bhattacharyya AR, Sridhar T, Beach F, Tabor RF, Majumder M. Synthesis and Stability of Water-in-Oil Emulsion Using Partially Reduced Graphene Oxide as a Tailored Surfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10311-10321. [PMID: 28872873 DOI: 10.1021/acs.langmuir.7b02320] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Graphene oxide (GO) is widely known as an amphiphile having hydrophilic oxygen functionality and unoxidized graphitic patches as the hydrophobic domains. Exploiting this amphiphilicity, GO serves as a surfactant to stabilize oil-water interfaces. While there are numerous reports on GO as a surfactant, most of these reports concern oil-in-water (O/W) emulsions, and there are very few on the formation of water-in-oil (W/O) emulsions. We prepared W/O emulsions using partially reduced graphene oxide (prGO) as a surfactant. The partial reduction introduces a subtle hydrophilic-lipophilic balance (HLB), which favors the formation of the W/O emulsion. The morphological features and rheological characteristics of the W/O emulsion with 75:25 water-to-oil ratio were investigated and analyzed in detail. The W/O emulsion was found to have polydispersity with wide range of droplet sizes varying between 2 to 500 μm. Using confocal microscopy, the role of parameters such as extent of reduction, continuous phase volume fraction and the concentration of GO on the stability, microstructure and variation of droplet size distribution of the W/O emulsion were carefully monitored. With prGO concentration as large as 0.05% (w/w), highly concentrated emulsion will form, and are stable up to 20 days from formation; destabilization occurred from sedimentation and subsequent coalescence as the partially reduced GO was limited by its dispersion ability in the oil-phase studied here. Understanding the mechanisms behind the transient stability will enable the development of novel emulsion compositions containing GO as a multifunctional additive.
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Affiliation(s)
- Tanesh D Gamot
- IITB-Monash Research Academy, Indian Institute of Technology Bombay , Main Gate Road, Powai, Mumbai 400076, India
- Department of Metallurgical engineering and Materials Science, Indian Institute of Technology Bombay , Main Gate Road, Powai, Mumbai 400076, India
- Nanoscale Science and Engineering Laboratory (NSEL), Department of Mechanical and Aerospace Engineering, Monash University , Wellington Road, Clayton, Victoria 3800, Australia
| | - Arup Ranjan Bhattacharyya
- Department of Metallurgical engineering and Materials Science, Indian Institute of Technology Bombay , Main Gate Road, Powai, Mumbai 400076, India
| | - Tam Sridhar
- Department of Chemical Engineering, Monash University , Wellington Road, Clayton, Victoria 3800, Australia
| | - Fiona Beach
- Orica Mining Services, George Booth Drive , Newcastle, New South Wales 2327, Australia
| | - Rico F Tabor
- School of Chemistry, Monash University , Wellington Road, Clayton, Victoria 3800, Australia
| | - Mainak Majumder
- Nanoscale Science and Engineering Laboratory (NSEL), Department of Mechanical and Aerospace Engineering, Monash University , Wellington Road, Clayton, Victoria 3800, Australia
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45
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Ali M, McCoy TM, McKinnon IR, Majumder M, Tabor RF. Synthesis and Characterization of Graphene Oxide-Polystyrene Composite Capsules with Aqueous Cargo via a Water-Oil-Water Multiple Emulsion Templating Route. ACS APPLIED MATERIALS & INTERFACES 2017; 9:18187-18198. [PMID: 28492312 DOI: 10.1021/acsami.7b02576] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Graphene oxide/polystyrene (GO/PS) nanocomposite capsules containing a two-compartment cargo have been successfully fabricated using a Pickering emulsion strategy. Highly purified GO sheets with typically micrometer-scale lateral dimensions and amphiphilic characteristics were prepared from the oxidation reaction of graphite with concomitant exfoliation of the graphite structure. These GO sheets were employed as a stabilizer for oil-in-water emulsions where the oil phase comprised toluene or olive oil. The stability and morphology of the emulsions were extensively studied as a function of different parameters including GO concentration, aqueous phase pH, ultrasonication time, effects of added electrolytes and stability to dilution. In selected conditions, the olive oil emulsions showed spontaneous formation of multiple w/o/w emulsions with high stability, whereas toluene formed simple o/w emulsions of lower overall stability. Olive oil emulsions were therefore used to prepare capsules templated from emulsion droplets by surrounding the oil phase with a GO/PS shell. The GO sheets, emulsions and composite capsules were characterized using a variety of physical and spectroscopic techniques in order to unravel the interactions responsible for capsule formation. The ability of the capsules to control the release of a model active agent in the form of a hydrophilic dye was explored, and release kinetics were monitored using UV-visible spectroscopy to obtain rate parameters. The composite capsules showed promising sustained release properties, with release rates 11× lower than the precursor GO-stabilized multiple emulsion droplets.
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Affiliation(s)
- Muthana Ali
- Department of Chemistry, University of Karbala , Karbala 56001, Iraq
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46
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Wang X, Zeng M, Yu YH, Wang H, Mannan MS, Cheng Z. Thermosensitive ZrP-PNIPAM Pickering Emulsifier and the Controlled-Release Behavior. ACS APPLIED MATERIALS & INTERFACES 2017; 9:7852-7858. [PMID: 28032975 DOI: 10.1021/acsami.6b16690] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Asymmetric Janus and Gemini ZrP-PNIPAM monolayer nanoplates were obtained by exfoliation of two-dimensional layered ZrP disks whose surface was covalently modified with thermosensitive polymer PNIPAM. The nanoplates largely reduced interfacial tension (IFT) of the oil/water interface so that they were able to produce stable oil/water emulsions, and the PNIPAM grafting either on the surface or the edge endowed the nanoplates rapid temperature responsivity. The ZrP-PNIPAM nanoplates proved to be thermosensitive Pickering emulsifiers for controlled-release applications.
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Affiliation(s)
- Xuezhen Wang
- Soft matter center, Guangdong Province Key Laboratory on Functional Soft Condensed Matter, School of materials and energy, Guangdong University of Technology , Guangzhou, 510006, China
| | | | | | - Huiliang Wang
- College of Chemistry, Beijing Normal University , Beijing, 100875, China
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47
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Peng B, Zhang L, Luo J, Wang P, Ding B, Zeng M, Cheng Z. A review of nanomaterials for nanofluid enhanced oil recovery. RSC Adv 2017. [DOI: 10.1039/c7ra05592g] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Utilizing nanomaterials in flooding techniques has the potential to enhance oil recovery.
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Affiliation(s)
- Baoliang Peng
- Research Institute of Petroleum Exploration & Development (RIPED)
- PetroChina
- Beijing 100083
- China
- Key Laboratory of Nano Chemistry (KLNC)
| | - Lecheng Zhang
- Artie McFerrin Department of Chemical Engineering
- Texas A&M University
- College Station
- USA
- Mary Kay O'Connor Process Safety Center
| | - Jianhui Luo
- Research Institute of Petroleum Exploration & Development (RIPED)
- PetroChina
- Beijing 100083
- China
- Key Laboratory of Nano Chemistry (KLNC)
| | - Pingmei Wang
- Research Institute of Petroleum Exploration & Development (RIPED)
- PetroChina
- Beijing 100083
- China
- Key Laboratory of Nano Chemistry (KLNC)
| | - Bin Ding
- Research Institute of Petroleum Exploration & Development (RIPED)
- PetroChina
- Beijing 100083
- China
- Key Laboratory of Nano Chemistry (KLNC)
| | - Minxiang Zeng
- Artie McFerrin Department of Chemical Engineering
- Texas A&M University
- College Station
- USA
| | - Zhengdong Cheng
- Artie McFerrin Department of Chemical Engineering
- Texas A&M University
- College Station
- USA
- Mary Kay O'Connor Process Safety Center
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48
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Xiang W, Zhao S, Song X, Fang S, Wang F, Zhong C, Luo Z. Amphiphilic nanosheet self-assembly at the water/oil interface: computer simulations. Phys Chem Chem Phys 2017; 19:7576-7586. [DOI: 10.1039/c6cp08654c] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The self-assembly of amphiphilic Janus triangular-plates at the water/oil interface is simulated for the first time.
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Affiliation(s)
- Wenjun Xiang
- School of Chemistry and Chemical Engineering
- Sichuan University of Arts and Science
- Dazhou
- P. R. China
| | - Shuangliang Zhao
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xianyu Song
- Department of Mechanical and Electrical Engineering
- Dazhou Vocational and Technical College
- Dazhou
- P. R. China
| | - Shenwen Fang
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- P. R. China
| | - Fen Wang
- School of Chemistry and Chemical Engineering
- Sichuan University of Arts and Science
- Dazhou
- P. R. China
| | - Cheng Zhong
- Department of Mechanical and Electrical Engineering
- Dazhou Vocational and Technical College
- Dazhou
- P. R. China
| | - Zhaoyang Luo
- Department of Mechanical and Electrical Engineering
- Dazhou Vocational and Technical College
- Dazhou
- P. R. China
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49
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Wang Z, Wang Y. Tuning Amphiphilicity of Particles for Controllable Pickering Emulsion. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E903. [PMID: 28774029 PMCID: PMC5457260 DOI: 10.3390/ma9110903] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 11/03/2016] [Accepted: 11/04/2016] [Indexed: 01/14/2023]
Abstract
Pickering emulsions with the use of particles as emulsifiers have been extensively used in scientific research and industrial production due to their edge in biocompatibility and stability compared with traditional emulsions. The control over Pickering emulsion stability and type plays a significant role in these applications. Among the present methods to build controllable Pickering emulsions, tuning the amphiphilicity of particles is comparatively effective and has attracted enormous attention. In this review, we highlight some recent advances in tuning the amphiphilicity of particles for controlling the stability and type of Pickering emulsions. The amphiphilicity of three types of particles including rigid particles, soft particles, and Janus particles are tailored by means of different mechanisms and discussed here in detail. The stabilization-destabilization interconversion and phase inversion of Pickering emulsions have been successfully achieved by changing the surface properties of these particles. This article provides a comprehensive review of controllable Pickering emulsions, which is expected to stimulate inspiration for designing and preparing novel Pickering emulsions, and ultimately directing the preparation of functional materials.
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Affiliation(s)
- Zhen Wang
- Department of Chemistry, Renmin University of China, Beijing 100872, China.
| | - Yapei Wang
- Department of Chemistry, Renmin University of China, Beijing 100872, China.
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50
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Fei X, Xia L, Chen M, Wei W, Luo J, Liu X. Preparation and Application of Water-in-Oil Emulsions Stabilized by Modified Graphene Oxide. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E731. [PMID: 28773851 PMCID: PMC5457042 DOI: 10.3390/ma9090731] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 08/20/2016] [Accepted: 08/22/2016] [Indexed: 11/30/2022]
Abstract
A series of alkyl chain modified graphene oxides (AmGO) with different alkyl chain length and content was fabricated using a reducing reaction between graphene oxide (GO) and alkyl amine. Then AmGO was used as a graphene-based particle emulsifier to stabilize Pickering emulsion. Compared with the emulsion stabilized by GO, which was oil-in-water type, all the emulsions stabilized by AmGO were water-in-oil type. The effects of alkyl chain length and alkyl chain content on the emulsion properties of AmGO were investigated. The emulsions stabilized by AmGO showed good stability within a wide range of pH (from pH = 1 to pH = 13) and salt concentrations (from 0.1 to 1000 mM). In addition, the application of water-in-oil emulsions stabilized by AmGO was investigated. AmGO/polyaniline nanocomposite (AmGO/PANi) was prepared through an emulsion approach, and its supercapacitor performance was investigated. This research broadens the application of AmGO as a water-in-oil type emulsion stabilizer and in preparing graphene-based functional materials.
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Affiliation(s)
- Xiaoma Fei
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Lei Xia
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Mingqing Chen
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Wei Wei
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Jing Luo
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Xiaoya Liu
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
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