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Spitzmüller L, Berson J, Schimmel T, Kohl T, Nitschke F. Temperature stability and enhanced transport properties by surface modifications of silica nanoparticle tracers for geo-reservoir exploration. Sci Rep 2024; 14:19222. [PMID: 39160197 PMCID: PMC11333493 DOI: 10.1038/s41598-024-70132-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Accepted: 08/13/2024] [Indexed: 08/21/2024] Open
Abstract
Tracer tests are an important tool for characterizing and monitoring subsurface reservoir properties. However, they are limited both because of the tracer molecules constraining factors such as irreversible adsorption, retention, and degradations, i.e. interaction processes of fluorophore molecule with surrounding media resulting in a large variation in transport properties. Elaborate tests utilizing more than one tracer to distinguish time or location of injection are complex and interpretation is ambiguous because each tracer interacts differently. In this study, we present an approach to increase tracer stability and enhance the transport uniformity of different tracers, thus making tests utilizing multiple tracers simpler and more feasible. We present this concept of tracer multiplicity by encapsulating an anionic, cationic or amphoteric fluorophore inside mesoporous silica nanoparticle carriers coated with a protective titania layer. Upon encapsulation, increased thermal resistance and drastically lowered sorption affinity towards quartz sand was detected in batch and flow-through experiments. An additional advantage of the presented nanoparticle tracers over molecular tracers is their modularity, which is demonstrated by surface modifications and application of additives that greatly reduce sorption and increase recovery rates in the flow experiments. With the here presented concept of tracer multiplicity, we introduce a new approach for colloidal tracer design that has the potential to expand and enhance measurable parameters, measurement accuracy and simplicity of analysis.
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Affiliation(s)
- Laura Spitzmüller
- Geothermal Energy and Reservoir Technology, Institute of Applied Geosciences, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany.
- Material Research Center for Energy Systems (MZE), Institute of Nanotechnology, Institute of Applied Physics, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany.
| | - Jonathan Berson
- Material Research Center for Energy Systems (MZE), Institute of Nanotechnology, Institute of Applied Physics, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany
| | - Thomas Schimmel
- Material Research Center for Energy Systems (MZE), Institute of Nanotechnology, Institute of Applied Physics, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany
| | - Thomas Kohl
- Geothermal Energy and Reservoir Technology, Institute of Applied Geosciences, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany
| | - Fabian Nitschke
- Geothermal Energy and Reservoir Technology, Institute of Applied Geosciences, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany
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2
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Mondo GB, Cathcarth M, Longo GS, Picco AS, Cardoso MB. Short Zwitterionic Sulfobetaine-Modified Silica Nanoparticles: Is Neutrality Possible? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10856-10867. [PMID: 38683600 DOI: 10.1021/acs.langmuir.4c00036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Zwitterionic coatings are an efficient strategy for preventing biomolecule adsorption and enhancing nanoparticle stability in solution. The properties of zwitterions and other antifouling materials, including suppression of nonspecific adsorption and improved colloidal stability of nanoparticles, are believed to derive from their electroneutral and highly hydrophilic nature. Among different zwitterions, short sulfobetaines have been demonstrated to be effective in preventing protein adsorption onto several nanoparticles and providing enhanced colloidal stability. Although zwitterionic sulfobetaine silane (ZS) is electrically neutral, the negatively charged zwitterionic sulfobetaine-functionalized silica nanoparticles (ZS@SiO2NPs) exhibit a similar ζ-potential to nonfunctionalized silica nanoparticles (SiO2NPs). In this work, we present a thorough comprehension of the surface properties of ZS@SiO2NPs, which encompasses the development of meticulous functionalization procedures, detailed characterization approaches, and cutting-edge modeling to address the questions that persist regarding the surface features of ZS@SiO2NPs. The negative charge of ZS@SiO2NPs is due to the stabilization of siloxide from residual surface silanols by the quaternary amine in the sulfobetaine structure. Consequently, we infer that zero-charge ZS@SiO2NPs are unlikely to be obtained since this stabilization increases the dissociation degree of surface silanols, increasing the overall structure negative charge. Additionally, colloidal stability was evaluated in different pH and ionic strength conditions, and it was found that ZS@SiO2NPs are more stable at higher ionic strengths. This suggests that the interaction between ZS and salt ions prevents the aggregation of ZS@SiO2NPs. Together, these results shed light on the nature of the ZS@SiO2NP negative charge and possible sources for the remarkable colloidal stability of zwitterionic nanoparticles in complex media.
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Affiliation(s)
- Gabriela Borba Mondo
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, Brazil
- Institute of Chemistry (IQ), University of Campinas (UNICAMP), P.O. Box 6154, 13083-970 Campinas, Brazil
| | - Marilina Cathcarth
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Faculdad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Diagonal 113 y 64, 1900 La Plata, Argentina
| | - Gabriel S Longo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Faculdad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Diagonal 113 y 64, 1900 La Plata, Argentina
| | - Agustín S Picco
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Faculdad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Diagonal 113 y 64, 1900 La Plata, Argentina
| | - Mateus Borba Cardoso
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, Brazil
- Institute of Chemistry (IQ), University of Campinas (UNICAMP), P.O. Box 6154, 13083-970 Campinas, Brazil
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3
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Aldakkan BS, Chalmpes N, Qi G, Hammami MA, Kanj MY, Giannelis EP. Synthesis of Raspberry-like Nanoparticles via Surface Grafting of Positively Charged Polyelectrolyte Brushes: Colloidal Stability and Surface Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5837-5849. [PMID: 38457691 DOI: 10.1021/acs.langmuir.3c03713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/10/2024]
Abstract
A method to synthesize stable, raspberry-like nanoparticles (NPs), using surface grafting of poly(glycidyl methacrylate) (PGMA) brushes on a polystyrene (PS) core with varying grafting densities, is reported. A two-step functionalization reaction of PGMA epoxide groups comprising an amination step first using ethylene diamine and then followed by a quaternization using glycidyltrimethylammonium chloride generates permanently and positively charged polyelectrolyte brushes, which result in both steric and electrostatic stabilization. The dispersion stability of the brush-bearing NPs is dramatically improved compared to that of the pristine PS core in salt solutions at ambient (25 °C) and elevated temperatures (60 °C). Additionally, the grafted polyelectrolyte chains undergo a reversible swelling in the presence of different ionic strength (IS) salts, which modulate the surface properties, including roughness, stiffness, and adhesion. An atomic force microscope under both dry and wet conditions was used to image conformational changes of the polyelectrolyte chains during the swelling and deswelling transitions as well as to probe the nanomechanical properties by analyzing the corresponding force-sample separation curves. The quaternized polyelectrolyte brushes undergo a conformational transition from a collapsed state to a swelled state in the osmotic brush (OB) regime triggered by the osmotic gradient of mobile ions to the interior of the polymer chain. At IS ∼ 1 M, the brushes contract and the globules reform (salted brush state) as evidenced by an increase in the surface roughness and a reduction in the adhesion of the brushes. Beyond IS ∼ 1 M, quartz crystal microbalance with dissipation monitoring measurements show that salt uptake continues to take place predominantly on the exterior surface of the brush since salt adsorption is not accompanied by a size increase as measured by dynamic light scattering. The study adds new insights into our understanding of the behavior of NPs bearing salt-responsive polyelectrolyte brushes with adaptive swelling thresholds that can ultimately modulate surface properties.
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Affiliation(s)
- Bashayer Saad Aldakkan
- Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Nikolaos Chalmpes
- Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Genggeng Qi
- Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Mohamed Amen Hammami
- Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Mazen Yousef Kanj
- College of Petroleum Engineering & Geosciences, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
| | - Emmanuel P Giannelis
- Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
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4
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Hosny R, Zahran A, Abotaleb A, Ramzi M, Mubarak MF, Zayed MA, Shahawy AE, Hussein MF. Nanotechnology Impact on Chemical-Enhanced Oil Recovery: A Review and Bibliometric Analysis of Recent Developments. ACS OMEGA 2023; 8:46325-46345. [PMID: 38107971 PMCID: PMC10720301 DOI: 10.1021/acsomega.3c06206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/09/2023] [Accepted: 11/14/2023] [Indexed: 12/19/2023]
Abstract
Oil and gas are only two industries that could change because of nanotechnology, a rapidly growing field. The chemical-enhanced oil recovery (CEOR) method uses chemicals to accelerate oil flow from reservoirs. New and enhanced CEOR compounds that are more efficient and eco-friendly can be created using nanotechnology. One of the main research areas is creating novel nanomaterials that can transfer EOR chemicals to the reservoir more effectively. It was creating nanoparticles that can be used to change the viscosity and surface tension of reservoir fluids and constructing nanoparticles that can be utilized to improve the efficiency of the EOR compounds that are already in use. The assessment also identifies some difficulties that must be overcome before nanotechnology-based EOR can become widely used in industry. These difficulties include the requirement for creating mass-producible, cost-effective nanomaterials. There is a need to create strategies for supplying nanomaterials to the reservoir without endangering the formation of the reservoir. The requirement is to evaluate the environmental effects of CEOR compounds based on nanotechnology. The advantages of nanotechnology-based EOR are substantial despite the difficulties. Nanotechnology could make oil production more effective, profitable, and less environmentally harmful. An extensive overview of the most current advancements in nanotechnology-based EOR is provided in this paper. It is a useful resource for researchers and business people interested in this area. This review's analysis of current advancements in nanotechnology-based EOR shows that this area is attracting more and more attention. There have been a lot more publications on this subject in recent years, and a lot of research is being done on many facets of nanotechnology-based EOR. The scientometric investigation discovered serious inadequacies in earlier studies on adopting EOR and its potential benefits for a sustainable future. Research partnerships, joint ventures, and cutting-edge technology that consider assessing current changes and advances in oil output can all benefit from the results of our scientometric analysis.
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Affiliation(s)
- Rasha Hosny
- Department
of Production, Egyptian Petroleum Research
Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Ahmed Zahran
- Department
of Production, Egyptian Petroleum Research
Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Ahmed Abotaleb
- Department
of Civil Engineering, Faculty of Engineering, Suez Canal University, Ismailia 41522, Egypt
| | - Mahmoud Ramzi
- Department
of Production, Egyptian Petroleum Research
Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Mahmoud F. Mubarak
- Department
of Petroleum Application, Egyptian Petroleum
Research Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Mohamed A. Zayed
- Chemistry
Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Abeer El Shahawy
- Department
of Civil Engineering, Faculty of Engineering, Suez Canal University, Ismailia 41522, Egypt
| | - Modather F. Hussein
- Chemistry
Department, College of Science, Al-Jouf
University, Sakakah 74331, Saudi Arabia
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5
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Zhang P, Zhang Y, Wang L, Qiu K, Tang X, Gibson JK, Liu X, Mei L, An S, Huang Z, Ren P, Wang Y, Chai Z, Shi W. Bioinspired Macrocyclic Molecule Supported Two-Dimensional Lamellar Membrane with Robust Interlayer Structure for High-Efficiency Nanofiltration. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206516. [PMID: 36541746 PMCID: PMC9929118 DOI: 10.1002/advs.202206516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Indexed: 06/17/2023]
Abstract
2D lamellar membranes (2DLMs) are used for efficient desalination and nanofiltration. However, weak interactions between adjacent stacked nanosheets result in susceptibility to swelling that limits practical applicability. Inspired by the super adhesion of multi-point suction cups on octopus tentacles, a 2DLM is constructed from Ti3 C2 Tx MXene supported by the macrocyclic "multi-point" molecule cucurbit[5]uril (CB5) and demonstrated for nanofiltration of methyl blue (MB) and enrichment of uranyl carbonate. Experimental results and density functional theory calculations indicate that CB5 rivets to the surface of the nanoflakes through strong stable interactions between its multiple binding sites and surface hydroxyl functional groups on MXene nanosheets. This novel 2DLM exhibits excellent nanofiltration performance (69 L m-2 h-1 bar-1 permeance with 93.6% rejection for MB) and can be recycled at least 30 times without significant degradation. The 2DLM exhibits excellent swelling resistance at high salinity, with a demonstration of selective enrichment of uranyl carbonate from artificial water and natural seawater. The results provide a new strategy for constructing highly stable 2DLMs with interlayer spacing controllable from sub-nano to nanometer scales, for size-selective sieving of molecules and ions, high-efficiency nanofiltration, and other applications.
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Affiliation(s)
- Pengcheng Zhang
- Laboratory of Nuclear Energy ChemistryInstitute of High Energy PhysicsChinese Academy of SciencesBeijing100049China
- Radiochemistry LaboratorySchool of Nuclear Science and TechnologyLanzhou UniversityLanzhou730000China
- Engineering Laboratory of Advanced Energy MaterialsNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo315201China
| | - Yujuan Zhang
- School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China
| | - Lin Wang
- Laboratory of Nuclear Energy ChemistryInstitute of High Energy PhysicsChinese Academy of SciencesBeijing100049China
| | - Kaikai Qiu
- School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China
| | - Xiaoyi Tang
- Laboratory of Nuclear Energy ChemistryInstitute of High Energy PhysicsChinese Academy of SciencesBeijing100049China
| | - John K. Gibson
- Chemical Sciences DivisionLawrence Berkeley National LaboratoryBerkeleyCA94720USA
| | - Xue Liu
- State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an710049China
| | - Lei Mei
- Laboratory of Nuclear Energy ChemistryInstitute of High Energy PhysicsChinese Academy of SciencesBeijing100049China
| | - Shuwen An
- Laboratory of Nuclear Energy ChemistryInstitute of High Energy PhysicsChinese Academy of SciencesBeijing100049China
| | - Zhiwei Huang
- Radiochemistry LaboratorySchool of Nuclear Science and TechnologyLanzhou UniversityLanzhou730000China
- Engineering Laboratory of Advanced Energy MaterialsNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo315201China
| | - Peng Ren
- School of Nuclear Science and EngineeringEast China University of TechnologyNanchang330013China
| | - Yi Wang
- State Key Laboratory of NBC Protection for CivilianBeijing102205China
| | - Zhifang Chai
- Engineering Laboratory of Advanced Energy MaterialsNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo315201China
| | - Weiqun Shi
- Laboratory of Nuclear Energy ChemistryInstitute of High Energy PhysicsChinese Academy of SciencesBeijing100049China
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6
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Hatchell D, Chen X, Daigle H, Hartmann M, Ordonez‐Varela J, Blondeau C, Johnston K. Stable
CO
2
/water foam stabilized by dilute surface‐modified nanoparticles and cationic surfactant at high temperature and salinity. J SURFACTANTS DETERG 2023. [DOI: 10.1002/jsde.12656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Daniel Hatchell
- Hildebrand Department of Petroleum and Geosystems Engineering University of Texas at Austin Austin Texas USA
| | - Xiongyu Chen
- McKetta Department of Chemical Engineering University of Texas at Austin Austin Texas USA
| | - Hugh Daigle
- Hildebrand Department of Petroleum and Geosystems Engineering University of Texas at Austin Austin Texas USA
| | - Matthew Hartmann
- McKetta Department of Chemical Engineering University of Texas at Austin Austin Texas USA
| | | | | | - Keith Johnston
- McKetta Department of Chemical Engineering University of Texas at Austin Austin Texas USA
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7
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Comprehensive study upon physicochemical properties of bio-ZnO NCs. Sci Rep 2023; 13:587. [PMID: 36631546 PMCID: PMC9834250 DOI: 10.1038/s41598-023-27564-w] [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: 09/09/2022] [Accepted: 01/04/2023] [Indexed: 01/12/2023] Open
Abstract
In this study, for the first time, the comparison of commercially available chemical ZnO NCs and bio-ZnO NCs produced extracellularly by two different probiotic isolates (Latilactobacillus curvatus MEVP1 [OM736187] and Limosilactobacillus fermentum MEVP2 [OM736188]) were performed. All types of ZnO formulations were characterized by comprehensive interdisciplinary approach including various instrumental techniques in order to obtain nanocomposites with suitable properties for further applications, i.e. biomedical. Based on the X- ray diffraction analysis results, all tested nanoparticles exhibited the wurtzite structure with an average crystalline size distribution of 21.1 nm (CHEM_ZnO NCs), 13.2 nm (1C_ZnO NCs) and 12.9 nm (4a_ZnO NCs). The microscopy approach with use of broad range of detectors (SE, BF, HAADF) revealed the core-shell structure of bio-ZnO NCs, compared to the chemical one. The nanoparticles core of 1C and 4a_ZnO NCs are coated by the specific organic deposit coming from the metabolites produced by two probiotic strains, L. fermentum and L. curvatus. Vibrational infrared spectroscopy, photoluminescence (PL) and mass spectrometry (LDI-TOF-MS) have been used to monitor the ZnO NCs surface chemistry and allowed for better description of bio-NCs organic coating composition (amino acids residues). The characterized ZnO formulations were then assessed for their photocatalytic properties against methylene blue (MB). Both types of bio-ZnO NCs exhibited good photocatalytic activity, however, the effect of CHEM_ZnO NCs was more potent than bio-ZnO NCs. Finally, the colloidal stability of the tested nanoparticles were investigated based on the zeta potential (ZP) and hydrodynamic diameter measurements in dependence of the nanocomposites concentration and investigation time. During the biosynthesis of nano-ZnO, the increment of pH from 5.7 to around 8 were observed which suggested possible contribution of zinc aquacomplexes and carboxyl-rich compounds resulted in conversion of zinc tetrahydroxy ion complex to ZnO NCs. Overall results in present study suggest that used accessible source such us probiotic strains, L. fermentum and L. curvatus, for extracellular bio-ZnO NCs synthesis are of high interest. What is important, no significant differences between organic deposit (e.g. metabolites) produced by tested strains were noticed-both of them allowed to form the nanoparticles with natural origin coating. In comparison to chemical ZnO NCs, those synthetized via microbiological route are promising material with further biological potential once have shown high stability during 7 days.
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8
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Babakhani P, Phenrat T, Baalousha M, Soratana K, Peacock CL, Twining BS, Hochella MF. Potential use of engineered nanoparticles in ocean fertilization for large-scale atmospheric carbon dioxide removal. NATURE NANOTECHNOLOGY 2022; 17:1342-1351. [PMID: 36443601 PMCID: PMC9747614 DOI: 10.1038/s41565-022-01226-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 09/05/2022] [Indexed: 06/06/2023]
Abstract
Artificial ocean fertilization (AOF) aims to safely stimulate phytoplankton growth in the ocean and enhance carbon sequestration. AOF carbon sequestration efficiency appears lower than natural ocean fertilization processes due mainly to the low bioavailability of added nutrients, along with low export rates of AOF-produced biomass to the deep ocean. Here we explore the potential application of engineered nanoparticles (ENPs) to overcome these issues. Data from 123 studies show that some ENPs may enhance phytoplankton growth at concentrations below those likely to be toxic in marine ecosystems. ENPs may also increase bloom lifetime, boost phytoplankton aggregation and carbon export, and address secondary limiting factors in AOF. Life-cycle assessment and cost analyses suggest that net CO2 capture is possible for iron, SiO2 and Al2O3 ENPs with costs of 2-5 times that of conventional AOF, whereas boosting AOF efficiency by ENPs should substantially enhance net CO2 capture and reduce these costs. Therefore, ENP-based AOF can be an important component of the mitigation strategy to limit global warming.
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Affiliation(s)
- Peyman Babakhani
- Earth Surface Science Institute, School of Earth and Environment, University of Leeds, Leeds, UK
| | - Tanapon Phenrat
- Research Unit for Integrated Natural Resources Remediation and Reclamation (IN3R), Department of Civil Engineering, Faculty of Engineering, Naresuan University, Phitsanulok, Thailand
- Center of Excellence for Sustainability of Health, Environment and Industry (SHE&I), Faculty of Engineering, Naresuan University, Phitsanulok, Thailand
| | - Mohammed Baalousha
- Center for Environmental Nanoscience and Risk, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | - Kullapa Soratana
- Faculty of Logistics and Digital Supply Chain, Naresuan University, Phitsanulok, Thailand
| | - Caroline L Peacock
- Earth Surface Science Institute, School of Earth and Environment, University of Leeds, Leeds, UK
| | | | - Michael F Hochella
- Earth Systems Science Division, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.
- Department of Geosciences, Virginia Tech, Blacksburg, VA, USA.
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9
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Dandamudi CB, Iqbal M, Lyon-Marion BA, Han JJL, Fei Y, Lee J, Ellison CJ, Pennell KD, Johnston KP. Mobility of Sub-50 nm Iron Oxide Nanoparticles with Ultrahigh Initial Magnetic Susceptibility in Intact Berea Sandstone at High Salinity. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chola Bhargava Dandamudi
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Muhammad Iqbal
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Bonnie A. Lyon-Marion
- Department of Civil and Environmental Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Jae Jin Lisa Han
- Department of Civil and Environmental Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Yunping Fei
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Joohyung Lee
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Christopher J. Ellison
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Kurt D. Pennell
- Department of Civil and Environmental Engineering, Tufts University, Medford, Massachusetts 02155, United States
- School of Engineering, Brown University, Providence, Rhode Island 02192, United States
| | - Keith P. Johnston
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
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10
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Zhong X, Chen J, Xu F, Chen X. Experimental investigation of zwitterionic surfactant-based silica nanofluid spontaneous imbibition at high salinity and elevated temperature conditions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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11
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Shi R, Ow H, Cox JR, Kmetz AA, Chen H. Optimizing Colloidal Stability and Transport of Polysaccharide-Coated Magnetic Nanoparticles for Reservoir Management: Effects of Ion Specificity. FRONTIERS IN NANOTECHNOLOGY 2022. [DOI: 10.3389/fnano.2022.864644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this work we explore the mechanisms of ion-specific stabilization of a polysaccharide-based coating for colloidal nanomaterials used within the oil & gas industry. While nanotechnology has wide prevalence across multiple industries, its utility within this sector is largely undeveloped but has potential applications in areas including (but not limited to) exploration, drilling and production processes. For example, reservoir contrast agents in the form of superparamagnetic nanoparticles could be used to accurately determine the residual oil saturation distribution in a reservoir and thus advise enhanced oil recovery (EOR) efforts. However, deployment of such materials in oil reservoirs proves challenging in cases where high salinity subsurface environments induce nanoparticle aggregation, leading to loss of mobility. Here, we report the synthesis and characterization of dextran-coated superparamagnetic iron oxide nanoparticles (Dex-SPIONs), the colloidal stability of which was evaluated in various brine formulations at elevated temperatures. Initial dynamic light scattering (DLS) measurements reveal a lack of contingency between particle stability and total electrolyte concentration for samples comprised of synthetic seawater and low-salinity brine, the latter fluid of which possesses higher ionic strength yet preserves colloidal integrity to a much greater extent than its seawater counterpart. Further experiments point to a calcium (Ca2+) ion-specific stabilization effect wherein surface complexation of Ca2+ ions to the dextran periphery improves carbohydrate hydration and thus enhances colloidal stability. Ion selective electrode (ISE) measurements provide additional evidence of the Ca2+ - dextran binding interaction, the role of which also factors significantly into mitigation of polysaccharide degradation [as demonstrated through gel permeation chromatography (GPC)]. Finally, we assess the transport of Dex-SPIONs through porous media, including examination of retention properties with respect to variances in ionic composition.
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12
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Li T, Xia X, Wu G, Cai Q, Lyu X, Ning J, Wang J, Kuang M, Yang Y, Pica Ciamarra M, Ni R, Yang D, Dong A. Mismatched ligand density enables ordered assembly of mixed-dimensional, cross-species materials. SCIENCE ADVANCES 2022; 8:eabq0969. [PMID: 35776790 PMCID: PMC10883371 DOI: 10.1126/sciadv.abq0969] [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
The ordered coassembly of mixed-dimensional species-such as zero-dimensional (0D) nanocrystals and 2D microscale nanosheets-is commonly deemed impracticable, as phase separation almost invariably occurs. Here, by manipulating the ligand grafting density, we achieve ordered coassembly of 0D nanocrystals and 2D nanosheets under standard solvent evaporation conditions, resulting in macroscopic, freestanding hybrid-dimensional superlattices with both out-of-plane and in-plane order. The key to suppressing the notorious phase separation lies in hydrophobizing nanosheets with molecular ligands identical to those of nanocrystals but having substantially lower grafting density. The mismatched ligand density endows the two mixed-dimensional components with a molecular recognition-like capability, driving the spontaneous organization of densely capped nanocrystals at the interlayers of sparsely grafted nanosheets. Theoretical calculations reveal that the intercalation of nanocrystals can substantially reduce the short-range repulsions of ligand-grafted nanosheets and is therefore energetically favorable, while subsequent ligand-ligand van der Waals attractions induce the in-plane order and kinetically stabilize the laminate superlattice structure.
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Affiliation(s)
- Tongtao Li
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Xiuyang Xia
- Chemical Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Guanhong Wu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Qingfu Cai
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Xuanyu Lyu
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Jing Ning
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Jing Wang
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Min Kuang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Yuchi Yang
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Massimo Pica Ciamarra
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Ran Ni
- Chemical Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Dong Yang
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Angang Dong
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
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13
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Effect of interparticle forces on the stability and droplet diameter of Pickering emulsions stabilized by PEG-coated silica nanoparticles. J Colloid Interface Sci 2022; 626:824-835. [DOI: 10.1016/j.jcis.2022.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/13/2022] [Accepted: 07/01/2022] [Indexed: 11/19/2022]
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14
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Zhu J, Da C, Chen J, Johnston KP. Ultrastable N 2/Water Foams Stabilized by Dilute Nanoparticles and a Surfactant at High Salinity and High Pressure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5392-5403. [PMID: 35439013 DOI: 10.1021/acs.langmuir.1c03347] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The rapid development of unconventional oil and gas resources presents challenges for foam flooding for reservoirs with high salinity and high heterogeneity at elevated temperatures. In this study, hydrophilic anionic sulfonate-modified nanoparticles (NPs) exhibited a synergistic effect with a cationic surfactant in stabilizing N2/water foam in the presence of concentrated divalent ions from ambient temperature up to 70 °C. With low concentrations of both the sulfonated NPs (SNPs) and cationic surfactant, the foams remained stable for 4 days at 50 °C and atmospheric pressure, while the surfactant-stabilized foams collapsed completely in 1 day. This stability mechanism of foams by the SNPs and cationic surfactant is described in terms of phase behavior, bulk shear rheology of the aqueous phase, and the dilational modulus of the gas-brine interface. The high surface elastic dilational modulus E' observed upon addition of the SNP provided stability against coarsening according to the Gibbs criteria. The cryo-SEM images also showed the compact bubble structure of foams provided by the SNPs. Consequently, very minor changes in the foam bubble size were observed at 208 bar (3000 psi) and 50 °C for up to 48 h with only 0.1 wt % or 0.3 wt % SNPs and 0.01 wt % Arquad 12-50, indicating excellent foam stability. The ability of the surfactant and NPs to stabilize foams at low concentrations broadens the application of foams in subsurface reservoirs at high temperatures and salinities.
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Affiliation(s)
- Jingyi Zhu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Chang Da
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Jessie Chen
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Keith P Johnston
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
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15
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Cosert KM, Kim S, Jalilian I, Chang M, Gates BL, Pinkerton KE, Van Winkle LS, Raghunathan VK, Leonard BC, Thomasy SM. Metallic Engineered Nanomaterials and Ocular Toxicity: A Current Perspective. Pharmaceutics 2022; 14:pharmaceutics14050981. [PMID: 35631569 PMCID: PMC9145553 DOI: 10.3390/pharmaceutics14050981] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/06/2022] [Accepted: 04/18/2022] [Indexed: 02/01/2023] Open
Abstract
The ocular surface, comprised of the transparent cornea, conjunctiva, and protective tear film, forms a protective barrier defending deeper structures of the eye from particulate matter and mechanical trauma. This barrier is routinely exposed to a multitude of naturally occurring and engineered nanomaterials (ENM). Metallic ENMs are particularly ubiquitous in commercial products with a high risk of ocular exposure, such as cosmetics and sunscreens. Additionally, there are several therapeutic uses for metallic ENMs owing to their attractive magnetic, antimicrobial, and functionalization properties. The increasing commercial and therapeutic applications of metallic ENMs come with a high risk of ocular exposure with poorly understood consequences to the health of the eye. While the toxicity of metallic ENMs exposure has been rigorously studied in other tissues and organs, further studies are necessary to understand the potential for adverse effects and inform product usage for individuals whose ocular health may be compromised by injury, disease, or surgical intervention. This review provides an update of current literature on the ocular toxicity of metallic ENMs in vitro and in vivo, as well as the risks and benefits of therapeutic applications of metallic ENMs in ophthalmology.
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Affiliation(s)
- Krista M. Cosert
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA; (K.M.C.); (S.K.); (I.J.); (M.C.); (B.L.G.); (B.C.L.)
| | - Soohyun Kim
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA; (K.M.C.); (S.K.); (I.J.); (M.C.); (B.L.G.); (B.C.L.)
| | - Iman Jalilian
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA; (K.M.C.); (S.K.); (I.J.); (M.C.); (B.L.G.); (B.C.L.)
| | - Maggie Chang
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA; (K.M.C.); (S.K.); (I.J.); (M.C.); (B.L.G.); (B.C.L.)
| | - Brooke L. Gates
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA; (K.M.C.); (S.K.); (I.J.); (M.C.); (B.L.G.); (B.C.L.)
| | - Kent E. Pinkerton
- Center for Health and the Environment, University of California Davis, Davis, CA 95616, USA; (K.E.P.); (L.S.V.W.)
- Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA
| | - Laura S. Van Winkle
- Center for Health and the Environment, University of California Davis, Davis, CA 95616, USA; (K.E.P.); (L.S.V.W.)
- Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA
| | - Vijay Krishna Raghunathan
- Department of Basic Sciences, College of Optometry, University of Houston, Houston, TX 77004, USA;
- The Ocular Surface Institute, College of Optometry, University of Houston, Houston, TX 77004, USA
- Department of Biomedical Engineering, Cullen College of Engineering, University of Houston, Houston, TX 77204, USA
| | - Brian C. Leonard
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA; (K.M.C.); (S.K.); (I.J.); (M.C.); (B.L.G.); (B.C.L.)
| | - Sara M. Thomasy
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA; (K.M.C.); (S.K.); (I.J.); (M.C.); (B.L.G.); (B.C.L.)
- Department of Ophthalmology & Vision Science, School of Medicine, University of California Davis, Davis, CA 95616, USA
- Correspondence: ; Tel.: +1-530-752-0926
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16
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Fouling Behavior and Dispersion Stability of Nanoparticle-Based Refrigeration Fluid. ENERGIES 2022. [DOI: 10.3390/en15093059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Nanofluids as heat transfer fluids have been acquiring popularity ever since their beginning. Therefore, the refrigeration research could not keep itself away from the ever-rising horizon of nanofluid applications. On the other hand, nanofluid stability remains the critical bottleneck for use. A significant reduction in nanofluids’ performance can derivate from instability phenomena. Looking to industrial applications, nanofluid long-term stability and reusability are crucial requisites. Nanoparticles’ deposits induce microchannel circuit obstruction, limiting the proper functioning of the device and negating the beneficial characteristics of the nanofluid. The aggregation and sedimentation of the particles may also determine the increased viscosity and pumping cost, and reduced thermal properties. So, there is a need to address the features of nanofluid starting from realization, evaluation, stabilization methods, and operational aspects. In this review, investigations of nanorefrigerants are summarized. In particular, a description of the preparation procedures of nanofluids was reported, followed by a deep elucidation of the mechanism of nanofluid destabilization and sedimentation, and finally, the literature results in this field were reviewed.
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17
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Faisal W, Almomani F. A critical review of the development and demulsification processes applied for oil recovery from oil in water emulsions. CHEMOSPHERE 2022; 291:133099. [PMID: 34848221 DOI: 10.1016/j.chemosphere.2021.133099] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/19/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
The formation of stable emulsions is a fundamental problem in oil industry that can result in a sequence of environmental and operational problems. Chemical demulsification is extensively applied for the recovery of oil from water as well as water from oil. This review introduces different chemical demulsifiers applied for the demulsification and recovery of oil from oil in water (O/W) emulsions. Main types of surfactants (anionic, cationic, nonionics and amphoteric) involved in the formation of emulsions and enhances their stability were discussed. Promising demulsifiers such as nanoparticle (NP), hyperbranched polymers, and ionic liquids (IL), which achieved high oil recovery rate, parameters influencing demulsification efficiency and demulsification mechanisms were explored. Lastly, improvements, challenges, and new changes being made to chemical demulsifiers were underlined. Functionalized magnetic nanoparticles and hyperbranched polymers were very effective in recovering oil from O/W emulsions with an efficiency >95%. Polymers with highly hydrophilic content and high molecular weight can achieve excellent oil recovery rates due to higher interfacial activity, higher dispersion, and presence of specific functional groups. Although ionic liquids could achieve oil recovery up to 90%, high cost limits their applications. NPs showed excellent oil recovery behavior at low concentrations and ambient temperature. Demulsification efficiency of NPs can be enhanced by functionalize with other components (e.g., polymers and surfactants), while service life can be extend by silica coating. Future challenges include scaling up the use of NPs in oil recovery process and highlighting contrasts between lab-scale and field-scale applications.
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Affiliation(s)
- Wamda Faisal
- College of Engineering, Department of Chemical Engineering, Qatar University, P.O. Box: 2713, Doha, Qatar
| | - Fares Almomani
- College of Engineering, Department of Chemical Engineering, Qatar University, P.O. Box: 2713, Doha, Qatar.
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18
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Da C, Chen X, Zhu J, Alzobaidi S, Garg G, Johnston KP. Elastic gas/water interface for highly stable foams with modified anionic silica nanoparticles and a like-charged surfactant. J Colloid Interface Sci 2022; 608:1401-1413. [PMID: 34749135 DOI: 10.1016/j.jcis.2021.10.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 10/10/2021] [Accepted: 10/11/2021] [Indexed: 10/20/2022]
Abstract
HYPOTHESIS Surface active anionic nanoparticles (NPs) with strategically designed covalent ligands may be combined with a liked-charged surfactant to form a highly elastic gas-water interface leading to highly stable gas/water foams. EXPERIMENTS The colloidal stability of the NPs was determined by dynamic light scattering, and the surface elastic dilational modulus E' of the interface by sinusoidal oscillation of a pendant droplet at 0.1 Hz, which was superimposed on large-amplitude compression-expansion cycles. The foam stability was measured with optical microscopy of the bubble size distribution and from the macroscopic foam height. FINDINGS The NPs played the key role the formation of a highly elastic air-water interface with a high E' despite a surfactant level well above the critical micelle concentration. Unlike the case for most previous studies, the NP amphiphilicity was essentially independent of the surfactant given the very low adsorption of the surfactant on the like-charged NP surfaces. With high E' values, both coalescence and coarsening were reduced leading to highly foam up to 80 °C. However, the surfactant facilitated foam generation at much lower shear rates than with NPs alone. The tuning of NP surfaces with ligands for colloidal stability in brine and simultaneously high amphiphilicity at the gas-water interface, over a wide range in surfactant concentration, is of broad interest for enabling the design of highly stable foams.
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Affiliation(s)
- Chang Da
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, TX, USA
| | - Xiongyu Chen
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, TX, USA
| | - Jingyi Zhu
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, TX, USA
| | - Shehab Alzobaidi
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, TX, USA
| | - Gaurav Garg
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, TX, USA
| | - Keith P Johnston
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, TX, USA.
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19
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Examining the role of salinity on the dynamic stability of Pickering emulsions. J Colloid Interface Sci 2022; 608:2321-2329. [PMID: 34809989 DOI: 10.1016/j.jcis.2021.10.154] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 10/23/2021] [Accepted: 10/25/2021] [Indexed: 11/22/2022]
Abstract
HYPOTHESIS The effect of salinity on Pickering emulsion stability to coalescence under dynamic forces present during flow in porous media for applications including enhanced oil recovery is poorly understood. Recent work suggests the absence of significant electrostatic repulsion in brine prompts unattached particles to assemble into inter-droplet networks that increase emulsion stability. We hypothesize that emulsions stabilized by nanoparticles coated with (3-glycidyloxypropyl)trimethoxysilane (GLYMO) will generate particle networks in brine and exhibit greater stability to coalescence than in deionized water (DI). EXPERIMENTS We stabilized decane-in-water emulsions with GLYMO-coated silica nanoparticles at various particle concentrations using brine and DI as the aqueous phase. We imaged the emulsions to calculate droplet diameters, then centrifuged the emulsions and weighed the volume of decane released to determine the extent of coalescence. We compared these measurements to evaluate the effect of salinity on emulsion stability. FINDINGS Emulsions demonstrate greater dynamic stability and smaller droplet diameters with increasing nanoparticle concentration and salinity. Controlling for differences in droplet size, we observe that brine reduces the emulsion coalescence rate by a factor of 78 ± 23 relative to DI. This difference supports and quantifies past work suggesting that unattached nanoparticles aggregate in brine and increase overall emulsion stability, whereas nanoparticles in DI remain separated.
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20
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Ahmed ST, Leckband DE. Forces between mica and end-grafted statistical copolymers of sulfobetaine and oligoethylene glycol in aqueous electrolyte solutions. J Colloid Interface Sci 2022; 608:1857-1867. [PMID: 34752975 DOI: 10.1016/j.jcis.2021.09.175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/26/2021] [Accepted: 09/27/2021] [Indexed: 11/17/2022]
Abstract
This study quantified the interfacial forces associated with end-grafted, statistical (AB) co-polymers of sulfobetaine methacrylate (SBMA) and oligoethylene glycol methacrylate (OEGMA) (poly(SBMA-co-OEGMA)). Surface force apparatus measurements compared forces between mica and end-grafted copolymers containing 0, 40, or 80 mol% SBMA. Studies compared forces measured at low grafting density (weakly overlapping chains) and at high density (brushes). At high density, the range of repulsive forces did not change significantly with increasing SBMA content. By contrast, at low density, both the range and the amplitude of the repulsion increased with the percentage of SBMA in the chains. The ionic strength dependence of the film thickness and repulsive forces increased similarly with SBMA content, reflecting the increasing influence of charged monomers and their interactions with ions in solution. The forces could be described by models of simple polymers in good solvent. However, the forces and fitted model parameters change continuously with the SBMA content. The latter behavior suggests that ethyene glycol and sulfobetaine behave as non-interacting, miscible monomers that contribute independently to the interfacial forces. The results suggest that molecular scale properties of statistical poly (SBMA-co-OEGMA) films can be readily tuned by simple variation of the monomer ratios.
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Affiliation(s)
- Syeda Tajin Ahmed
- Department of Chemical and Biomolecular Engineering, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA
| | - Deborah E Leckband
- Department of Chemical and Biomolecular Engineering, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA; Department of Chemistry, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA.
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21
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Alzobaidi S, Angeles T, Rodriguez G, Johnston KP, Enick RM. Carbon Dioxide-in-Oil (C/O) Emulsions Stabilized by Silica Nanoparticles Functionalized with Oleophilic and CO2-philic Ligands. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shehab Alzobaidi
- McKetta Department of Chemical Engineering, University of Texas at Austin, 200 E. Dean Keeton Street, Austin, Texas 78712, United States
| | - Timothy Angeles
- McKetta Department of Chemical Engineering, University of Texas at Austin, 200 E. Dean Keeton Street, Austin, Texas 78712, United States
| | - Gianfranco Rodriguez
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, 940 Benedum Engineering Hall, Pittsburgh, Pennsylvania 15261, United States
| | - Keith P. Johnston
- McKetta Department of Chemical Engineering, University of Texas at Austin, 200 E. Dean Keeton Street, Austin, Texas 78712, United States
| | - Robert M. Enick
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, 940 Benedum Engineering Hall, Pittsburgh, Pennsylvania 15261, United States
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22
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Ahmed ST, Madinya JJ, Leckband DE. Ionic strength dependent forces between end-grafted Poly(sulfobetaine) films and mica. J Colloid Interface Sci 2022; 606:298-306. [PMID: 34392027 DOI: 10.1016/j.jcis.2021.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/26/2021] [Accepted: 08/01/2021] [Indexed: 12/12/2022]
Abstract
The molecular surface properties of zwitterionic polymer coatings are central to their ultra-low fouling properties and effectiveness as steric stabilizers in concentrated salt solutions. Here, Surface Force Apparatus measurements quantified the molecular forces between end-grafted poly(sulfobetaine) methacrylate thin films and mica, as a function of the chain grafting density and ionic strength. These results demonstrate that, at the ionic strengths considered, end-grafted poly(sulfobetaine) films can be described by models for polymers in good solvent. Parameters determined from data fits to the Milner-Witten-Cates or Dolan and Edwards models for dense or dilute chains, respectively, varied with ionic strength, in ways that reflect poly(sulfobetaine) swelling and the increased excluded volume strength of chain segments. These force measurements provide new insight into how polymer coverage and salt cooperate to regulate repulsive poly(sulfobetaine) steric barriers. These findings have implications for the design of grafted poly(sulfobetaine) as colloidal stabilizers or nonfouling surface coatings.
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Affiliation(s)
- Syeda Tajin Ahmed
- Department of Chemical and Biomolecular Engineering, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA
| | - Jason J Madinya
- Department of Chemical and Biomolecular Engineering, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA
| | - Deborah E Leckband
- Department of Chemical and Biomolecular Engineering, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA; Department of Chemical and Biomolecular Engineering and Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Roger Adams Laboratory, Urbana, IL 61801, USA.
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23
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Zhong X, Chen J, An R, Li K, Chen M. A state-of-the-art review of nanoparticle applications with a focus on heavy oil viscosity reduction. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117845] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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24
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Tran E, Richmond GL. Interfacial Steric and Molecular Bonding Effects Contributing to the Stability of Neutrally Charged Nanoemulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:12643-12653. [PMID: 34662126 DOI: 10.1021/acs.langmuir.1c02020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In cosmetic, pharmaceutical, and food applications, many active ingredients have limited bioavailability in an aqueous environment, and in that context, nanoemulsions provide a mechanism for encapsulation, protection, and transport. These dispersed oil droplets are on the order of 100s of nanometers in diameter and owe their long-term stability to emulsifiers that are commonly charged. More recently, applications have been utilizing nonionic species as stabilizing agents due to their enhanced biosafety. DLVO (named after Derjaguin, Landau, Verwey, and Overbeek) theory has been central in the description of colloid stability, which emphasizes repulsive electrostatic forces, while extended DLVO theory also accounts for steric effects. Past studies of nanoemulsions have largely employed charged surfactants and polyelectrolytes, making it difficult to decouple electrostatic and steric effects as they relate to droplet stability. To better understand steric and molecular factors contributing to the stability of "uncharged" droplets, we have created nanoemulsions with sodium dodecyl sulfate (SDS) and poly(N-vinylacetamide) (PNVA). Though SDS is anionic, with PNVA coating the droplet surfaces, the ζ-potentials of these nanoemulsions are ∼0 mV. Despite minimizing electrostatic contributions, these nanoemulsions are stable for upward of a month with interesting dynamics. By employing dynamic light scattering, vibrational sum frequency scattering spectroscopy, and calculating interaction pair potentials using extended DLVO theory, we learn that the thickness of the PNVA layer plays a critical role in stabilizing these "uncharged" nanoemulsions. Beyond the sterics, the molecular conformation of the PNVA strands also contributes to the droplet stability. The adsorbed PNVA strands are shown to form stratified, rigid polymer networks that prevent the nanoemulsions from rapid destabilization.
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Affiliation(s)
- Emma Tran
- University of Oregon, Eugene, Oregon 97403, United States
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25
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Improved insight on the application of nanoparticles in enhanced oil recovery process. SCIENTIFIC AFRICAN 2021. [DOI: 10.1016/j.sciaf.2021.e00873] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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26
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Improving Fibrin Hydrogels' Mechanical Properties, through Addition of Silica or Chitosan-Silica Materials, for Potential Application as Wound Dressings. Int J Biomater 2021; 2021:9933331. [PMID: 34188685 PMCID: PMC8192204 DOI: 10.1155/2021/9933331] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/22/2021] [Accepted: 05/26/2021] [Indexed: 12/12/2022] Open
Abstract
Fibrin is a protein-based hydrogel formed during blood coagulation. It can also be produced in vitro from human blood plasma, and it is capable of resisting high deformations. However, after each deformation process, it loses high amounts of water, which subsequently makes it mechanically unstable and, finally, difficult to manipulate. The objective of this work was to overcome the in vitro fibrin mechanical instability. The strategy consists of adding silica or chitosan-silica materials and comparing how the different materials electrokinetic-surface properties affect the achieved improvement. The siliceous materials electrostatic and steric stabilization mechanisms, together with plasma protein adsorption on their surfaces, were corroborated by DLS and ζ-potential measurements before fibrin gelling. These properties avoid phase separation, favoring homogeneous incorporation of the solid into the forming fibrin network. Young's modulus of modified fibrin hydrogels was evaluated by AFM to quantitatively measure stiffness. It increased 2.5 times with the addition of 4 mg/mL silica. A similar improvement was achieved with only 0.7 mg/mL chitosan-silica, which highlighted the contribution of hydrophilic chitosan chains to fibrinogen crosslinking. Moreover, these chains avoided the fibroblast growth inhibition onto modified fibrin hydrogels 3D culture observed with silica. In conclusion, 0.7 mg/mL chitosan-silica improved the mechanical stability of fibrin hydrogels with low risks of cytotoxicity. This easy-to-manipulate modified fibrin hydrogel makes it suitable as a wound dressing biomaterial.
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27
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Da C, Zhang X, Alzobaidi S, Hu D, Wu P, Johnston KP. Tuning Surface Chemistry and Ionic Strength to Control Nanoparticle Adsorption and Elastic Dilational Modulus at Air-Brine Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5795-5809. [PMID: 33944565 DOI: 10.1021/acs.langmuir.1c00112] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The relationship between the interfacial rheology of nanoparticle (NP) laden air-brine interfaces and NP adsorption and interparticle interactions is not well understood, particularly as a function of the surface chemistry and salinity. Herein, a nonionic ether diol on the surface of silica NPs provides steric stabilization in bulk brine and at the air-brine interface, whereas a second smaller underlying hydrophobic ligand raises the hydrophobicity to promote NP adsorption. The level of NPs adsorption at steady state is sufficient to produce an interface with a relatively strong elastic dilational modulus E' = dγ/d ln A. However, the interface is ductile with a relatively slow change in E' as the interfacial area is varied over a wide range during compression and expansion. In contrast, for silica NPs stabilized with only a single hydrophobic ligand, the interfaces are often more fragile and may fracture with small changes in area. The presence of concentrated divalent cations improves E' and ductility by screening electrostatic dipolar repulsion and strengthening the attractive forces between nanoparticles. The ability to tune the interfacial rheology with NP surface chemistry is of great interest for designing more stable gas/brine foams.
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Affiliation(s)
- Chang Da
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, Texas 78712, United States
| | - Xuan Zhang
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, Texas 78712, United States
- College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
| | - Shehab Alzobaidi
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, Texas 78712, United States
| | - Dongdong Hu
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, Texas 78712, United States
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Pingkeng Wu
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, Texas 78712, United States
| | - Keith P Johnston
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas, Austin, Texas 78712, United States
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Alzobaidi S, Da C, Wu P, Zhang X, Rabat-Torki NJ, Harris JM, Hackbarth JE, Lu C, Hu D, Johnston KP. Tuning Nanoparticle Surface Chemistry and Interfacial Properties for Highly Stable Nitrogen-In-Brine Foams. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5408-5423. [PMID: 33881323 DOI: 10.1021/acs.langmuir.1c00832] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The design of surface chemistries on nanoparticles (NPs) to stabilize gas/brine foams with concentrated electrolytes, especially with divalent ions, has been elusive. Herein, we tune the surface of 20 nm silica NPs by grafting a hydrophilic and a hydrophobic ligand to achieve two seemingly contradictory goals of colloidal stability in brine and high NP adsorption to yield a viscoelastic gas-brine interface. Highly stable nitrogen/water (N2/brine) foams are formed with CaCl2 concentrations up to 2% from 25 to 90 °C. The viscoelastic gas-brine interface retards drainage of the lamellae, and the high dilational elasticity arrests coarsening (Ostwald ripening) with no observable change in foam bubble size over 48 h. The ability to design NP-laden viscoelastic interfaces for highly stable foams, even with high divalent ion concentrations, is of fundamental mechanistic interest for a broad range of foam applications and in particular foams for CO2 sequestration and enhanced oil recovery.
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Affiliation(s)
- Shehab Alzobaidi
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
| | - Chang Da
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
| | - Pingkeng Wu
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
| | - Xuan Zhang
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
| | - Nava J Rabat-Torki
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
| | - Justin M Harris
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
| | - Jamie E Hackbarth
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
| | - Congwen Lu
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
| | - Dongdong Hu
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
| | - Keith P Johnston
- McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712-1139, United States
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High Salinity and High Temperature Stable Colloidal Silica Nanoparticles with Wettability Alteration Ability for EOR Applications. NANOMATERIALS 2021; 11:nano11030707. [PMID: 33799757 PMCID: PMC7999990 DOI: 10.3390/nano11030707] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 12/04/2022]
Abstract
The stability of nanoparticles at reservoir conditions is a key for a successful application of nanofluids for any oilfield operations, e.g., enhanced oil recovery (EOR). It has, however, remained a challenge to stabilize nanoparticles under high salinity and high temperature conditions for longer duration (at least months). In this work, we report surface modification of commercial silica nanoparticles by combination of zwitterionic and hydrophilic silanes to improve its stability under high salinity and high temperature conditions. To evaluate thermal stability, static and accelerated stability analyses methods were employed to predict the long-term thermal stability of the nanoparticles in pH range of 4–7. The contact angle measurements were performed on aged sandstone and carbonate rock surfaces to evaluate the ability of the nanoparticles to alter the wettability of the rock surfaces. The results of static stability analysis showed excellent thermal stability in 3.5% NaCl brine and synthetic seawater (SSW) at 60 °C for 1 month. The accelerated stability analysis predicted that the modified nanoparticles could remain stable for at least 6 months. The results of contact angle measurements on neutral-wet Berea, Bentheimer, and Austin Chalk showed that the modified nanoparticles were able to adsorb on these rock surfaces and altered wettability to water-wet. A larger change in contact angle for carbonate surface than in sandstone surface showed that these particles could be more effective in carbonate reservoirs or reservoirs with high carbonate content and help improve oil recovery.
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Alzobaidi S, Wu P, Da C, Zhang X, Hackbarth J, Angeles T, Rabat-Torki NJ, MacAuliffe S, Panja S, Johnston KP. Effect of surface chemistry of silica nanoparticles on contact angle of oil on calcite surfaces in concentrated brine with divalent ions. J Colloid Interface Sci 2021; 581:656-668. [PMID: 32814189 DOI: 10.1016/j.jcis.2020.07.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 11/29/2022]
Abstract
HYPOTHESIS For an oil droplet on calcite with an intervening brine film, the water contact angle θw may be reduced markedly (greater water wetness) with surface modified silica nanoparticles (NP). Modification with cationic, anionic, and nonionic ligands may be used to control the nanoparticle adsorption and interactions at the oil-brine and brine-calcite interfaces to influence the rate and degree of reduction in θw. EXPERIMENTS The colloidal stability at 25 °C was determined in concentrated divalent brine (8 wt% NaCl and 2 wt% CaCl2) with dynamic light scattering, and the NP adsorption was determined on calcite. The NP adsorption at the oil-brine interface was characterized with the elastic dilational modulus. θw was measured for model decane-stearic acid droplets and crude oil droplets on calcite from 25 to 80 °C. FINDINGS The fastest rate and greatest extent of reduction in θw for grafted ligands followed the order: cationic quaternary trimethylamine > sulfonate > methyl phosphonate > gluconamide. New mechanisms for reduction in θw were demonstrated on the basis of changes in interactions from NP adsorption at each interface. The greatest efficacy for the cationic NPs results from the weakest adsorption on calcite, steric repulsion at the three-phase contact line and the greatest desorption of carboxylate surfactants from the calcite.
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Affiliation(s)
- Shehab Alzobaidi
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
| | - PingKeng Wu
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
| | - Chang Da
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
| | - Xuan Zhang
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
| | - Jamie Hackbarth
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
| | - Timothy Angeles
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
| | - Nava J Rabat-Torki
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
| | - Shaye MacAuliffe
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
| | - Sudipta Panja
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
| | - Keith P Johnston
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States.
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Hiebner DW, Barros C, Quinn L, Vitale S, Casey E. Surface functionalization-dependent localization and affinity of SiO 2 nanoparticles within the biofilm EPS matrix. Biofilm 2020; 2:100029. [PMID: 33447814 PMCID: PMC7798476 DOI: 10.1016/j.bioflm.2020.100029] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 05/21/2020] [Accepted: 05/28/2020] [Indexed: 11/30/2022] Open
Abstract
The contribution of the biofilm extracellular polymeric substance (EPS) matrix to reduced antimicrobial susceptibility in biofilms is widely recognised. As such, the direct targeting of the EPS matrix is a promising biofilm control strategy that allows for the disruption of the matrix, thereby allowing a subsequent increase in susceptibility to antimicrobial agents. To this end, surface-functionalized nanoparticles (NPs) have received considerable attention. However, the fundamental understanding of the interactions occurring between engineered NPs and the biofilm EPS matrix has not yet been fully elucidated. An insight into the underlying mechanisms involved when a NP interacts with the EPS matrix will aid in the design of more efficient NPs for biofilm control. Here we demonstrate the use of highly specific fluorescent probes in confocal laser scanning microscopy (CLSM) to illustrate the distribution of EPS macromolecules within the biofilm. Thereafter, a three-dimensional (3D) colocalization analysis was used to assess the affinity of differently functionalized silica NPs (SiNPs) and EPS macromolecules from Pseudomonas fluorescens biofilms. Results show that both the charge and surface functional groups of SiNPs dramatically affected the extent to which SiNPs interacted and localized with EPS macromolecules, including proteins, polysaccharides and DNA. Hypotheses are also presented about the possible physicochemical interactions which may be dominant in EPS matrix-NP interactions. This research not only develops an innovative CLSM-based methodology for elucidating biofilm-nanoparticle interactions but also provides a platform on which to build more efficient NP systems for biofilm control.
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Affiliation(s)
- Dishon Wayne Hiebner
- UCD School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Dublin, Ireland
| | - Caio Barros
- UCD School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Dublin, Ireland
| | - Laura Quinn
- UCD School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Dublin, Ireland
| | - Stefania Vitale
- UCD School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Dublin, Ireland
| | - Eoin Casey
- UCD School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Dublin, Ireland
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Mirzaie Yegane M, Hashemi F, Vercauteren F, Meulendijks N, Gharbi R, Boukany PE, Zitha P. Rheological response of a modified polyacrylamide-silica nanoparticles hybrid at high salinity and temperature. SOFT MATTER 2020; 16:10198-10210. [PMID: 33034307 DOI: 10.1039/d0sm01254h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Water-soluble polyacrylamides have often been used to modify flow response in various water-based technologies and industrial processes, including paints, water treatment, paper manufacturing, and chemical enhanced oil recovery. Polymers are susceptible to degradation at combined high salinity and elevated temperature conditions which limits their overall performance. Hybrid mixtures of hydrophobically modified polyacrylamide (HMPAM) with hydrophobically modified silica nanoparticles (NPs) emerged as a promising strategy for achieving enhanced stability and high viscosity in brines having a high total dissolved solids (TDS) content and high hardness at elevated temperatures (>20 wt% TDS, including >1.5 wt% divalent cations at T > 70 °C). The rheological response of the hybrids at various concentrations of HMPAM and NPs was examined to investigate the synergic effects. Hybridization of HMPAM with NPs led to a higher viscosity at high salinity and elevated temperature. The viscosity improvement was more pronounced when the concentration of HMPAM was in the semi-dilute regime and concentration of NPs was higher than a critical threshold where the viscosity increased roughly by a factor of 1.5. Here we present the mechanisms of improved viscosity behaviour. The rheological data suggest the role of NPs in the bridging between HMPAM molecules, which in turn increases the hydrodynamic radius and consequently the viscosity of the hybrids.
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Affiliation(s)
- Mohsen Mirzaie Yegane
- Department of Geosciences and Engineering, Delft University of Technology, Delft, The Netherlands.
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Chen W, Karde V, Cheng TNH, Ramli SS, Heng JYY. Surface hydrophobicity: effect of alkyl chain length and network homogeneity. Front Chem Sci Eng 2020. [DOI: 10.1007/s11705-020-2003-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AbstractUnderstanding the nature of hydrophobicity has fundamental importance in environmental applications. Using spherical silica nanoparticles (diameter = 369 ± 7 nm) as the model material, the current study investigates the relationship between the alkyl chain network and hydro-phobicity. Two alkyl silanes with different chain length (triethoxymethylsilane (C1) vs. trimethoxy(octyl)silane (C8)) were utilised separately for the functionalisation of the nanoparticles. Water contact angle and inverse gas chromatography results show that the alkyl chain length is essential for controlling hydrophobicity, as the octyl-functionalised nanoparticles were highly hydrophobic (water contact angle = 150.6° ± 6.6°), whereas the methyl-functionalised nanoparticles were hydrophilic (i.e., water contact angle = 0°, similar to the pristine nanoparticles). The homogeneity of the octyl-chain network also has a significant effect on hydrophobicity, as the water contact angle was reduced significantly from 148.4° ± 3.5° to 30.5° ± 1.0° with a methyl-/octyl-silane mixture (ratio = 160:40 µL·g−1 nanoparticles).
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Toledo L, Palacio DA, Urbano BF. Tuning the softness of poly(2-hydroxyethyl methacrylate) nanocomposite hydrogels through the addition of PEG coated nanoparticles. J Colloid Interface Sci 2020; 578:749-757. [PMID: 32570144 DOI: 10.1016/j.jcis.2020.06.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/06/2020] [Accepted: 06/09/2020] [Indexed: 11/29/2022]
Abstract
HYPOTHESIS In nanocomposites, several factors govern the enhancement of properties when a nanofiller is added into a polymer matrix. Previously, our group have demonstrated that stabilizing nanoparticles improves the dispersion of nanoparticles in a hydrogel, but their effect on viscoelastic properties remain unclear. We hypothesized that coating the nanoparticles will block matrix-nanoparticle interactions, which would then affect the transfer of stress when the hydrogel is subjected to stress. EXPERIMENT To this end, we investigated the effects that nanofillers coated with polyethylene glycol (PEG) of variable molar mass have on the properties of physical hydrogels made from poly(2-hydroxyethyl methacrylate). PEG with molar masses of 6, 20, and 35 kDa were used at different concentrations and the viscoelastic properties of the resulting hydrogels were studied and compared with control hydrogels with and without nanofillers. FINDINGS The coated nanofiller resulted in enhanced dispersion stabilization as the molar mass and concentration of the PEG increased. However, there were noticeable changes in viscoelastic properties. In general, the nanocomposite hydrogels exhibited reduced shear modulus, greater creep, and more accentuated shear thinning behaviour. These effects were attributed to hindered matrix-nanoparticle interactions because of the PEG coating, an increased slippage of the PHEMA chains as well as a plasticizing effect.
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Affiliation(s)
- Leandro Toledo
- Departmento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile
| | - Daniel A Palacio
- Departmento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile
| | - Bruno F Urbano
- Departmento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile.
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Ghaleh VR, Mohammadi A. The stability and surface activity of environmentally responsive surface-modified silica nanoparticles: the importance of hydrophobicity. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1617733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Vahid Rajabi Ghaleh
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Aliasghar Mohammadi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
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Mikhaylov VI, Kryuchkova AV, Sitnikov PA, Koval LA, Zemskaya NV, Krivoshapkina EF, Krivoshapkin PV. Magnetite Hydrosols with Positive and Negative Surface Charge of Nanoparticles: Stability and Effect on the Lifespan of Drosophila melanogaster. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:4405-4415. [PMID: 32243164 DOI: 10.1021/acs.langmuir.0c00605] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This paper presents sols of uncoated and citric acid-coated Fe3O4 nanoparticles obtained by a combination of coprecipitation and sonochemistry methods. A stable concentrated CA-Fe3O4 sol synthesized by a combination of coprecipitation with an inconvenient Fe2+/Fe3+ ratio, modification with citric acid and US treatment was obtained for the first time. A comparative analysis of the composition and morphology of nanoparticles was performed. The sols are oppositely charged and behave as a typical ferrofluid. The citric acid-modified sol is aggregatively stable over wider ranges of pH and electrolyte concentration, but it becomes less stable with the temperature increase. DLVO calculations showed that steric repulsion forces are a vital factor contributing to increased aggregative stability in a modified Fe3O4 sol. The experiments have revealed the magneto-optical effect in a modified Fe3O4 sol with an electrolyte concentration of 0.025-0.075 M caused by a high potential barrier and a deep secondary minimum in pairwise interaction curves. The "pK spectroscopy" mathematical model to describe the potentiometric curves of synthesized magnetite sols was used for the first time. According to potentiometric titration, the ions of the electrolyte practically do not contribute to formation of a surface charge in modified Fe3O4 with a change in pH due to blocking the magnetite surface by citric acid molecules. Drosophila melanogaster was used as a model to show that Fe3O4 in chronic exposure has a low toxic effect.
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Affiliation(s)
- Vasily I Mikhaylov
- Institute of Chemistry, Federal Research Centre, Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, 48 Pervomayskaya Street, 167000 Syktyvkar, Russia
| | | | - Petr A Sitnikov
- Institute of Chemistry, Federal Research Centre, Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, 48 Pervomayskaya Street, 167000 Syktyvkar, Russia
| | - Liubov A Koval
- Institute of Biology, Federal Research Centre, Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, 28 Kommunisticheskaya Street, 167982 Syktyvkar, Russia
| | - Nadezhda V Zemskaya
- Institute of Biology, Federal Research Centre, Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, 28 Kommunisticheskaya Street, 167982 Syktyvkar, Russia
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Ureña-Benavides EE, Moaseri E, Changalvaie B, Fei Y, Iqbal M, Lyon BA, Kmetz AA, Pennell KD, Ellison CJ, Johnston KP. Polyelectrolyte coated individual silica nanoparticles dispersed in concentrated divalent brine at elevated temperatures for subsurface energy applications. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Fjordbøge AS, Uthuppu B, Jakobsen MH, Fischer SV, Broholm MM. Mobility of electrostatically and sterically stabilized gold nanoparticles (AuNPs) in saturated porous media. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:29460-29472. [PMID: 31401800 DOI: 10.1007/s11356-019-06132-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
The stability of gold nanoparticles (AuNPs) stabilized electrostatically with citrate or (electro)sterically by commercially available amphiphilic block copolymers (PVP-VA or PVA-COOH) was studied under various physicochemical conditions. Subsequently, the mobility of the AuNPs in porous media (sand) was investigated in column studies under environmental relevant physicochemical conditions. Electrostatically stabilized AuNPs were unstable under most physicochemical conditions due to the compression of the electrical double layer. Consequently, aggregation and deposition rapidly immobilized the AuNPs. Sterically stabilized AuNPs showed significantly less sensitivity towards changes in the physicochemical conditions with high stability, high mobility with negligible retardation, and particle deposition rate coefficients ranging an order of magnitude (1.5 × 10-3 to 1.5 × 10-2 min-1) depending on the type and amount of stabilizer, and thereby the surface coverage and attachment affinity. The transport of sterically stabilized AuNPs is facilitated by reversible deposition in shallow energy minima with continuous reentrainment and blocking of available attachment sites by deposited AuNPs. The stability and mobility of NPs in the environment will thereby be highly dependent on the specific stabilizing agent and variations in the coverage on the NP. Under the given experimental conditions, transport distances of the most mobile AuNPs of up to 20 m is expected. Due to their size-specific plasmonic properties, the easily detectable AuNPs are proposed as potential model or tracer particles for studying transport of various stabilized NPs under environmental conditions.
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Affiliation(s)
- Annika S Fjordbøge
- Department of Environmental Engineering, Technical University of Denmark, Miljøvej, Building 113, 2800, Kgs. Lyngby, Denmark.
| | - Basil Uthuppu
- Department of Micro- and Nanotechnology, Technical University of Denmark, Ørsteds Plads, Building 345 East, 2800, Kgs. Lyngby, Denmark
| | - Mogens H Jakobsen
- Department of Micro- and Nanotechnology, Technical University of Denmark, Ørsteds Plads, Building 345 East, 2800, Kgs. Lyngby, Denmark
| | - Søren V Fischer
- Department of Micro- and Nanotechnology, Technical University of Denmark, Ørsteds Plads, Building 345 East, 2800, Kgs. Lyngby, Denmark
| | - Mette M Broholm
- Department of Environmental Engineering, Technical University of Denmark, Miljøvej, Building 113, 2800, Kgs. Lyngby, Denmark
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Lee JG, Cho W, Kim Y, Cho H, Lee H, Kim JH. Formation of a conductive overcoating layer based on hybrid composites to improve the stability of flexible transparent conductive films. RSC Adv 2019; 9:4428-4434. [PMID: 35520190 PMCID: PMC9060591 DOI: 10.1039/c8ra09233h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 01/08/2019] [Indexed: 11/21/2022] Open
Abstract
A protective layer that can be applied on a flat flexible transparent conductive film was prepared by combining silica sol and organic polymer.
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Affiliation(s)
- Jin-geun Lee
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul
- South Korea
| | - Wonseok Cho
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul
- South Korea
| | - Youngno Kim
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul
- South Korea
| | - Hangyeol Cho
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul
- South Korea
| | - Hongjoo Lee
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul
- South Korea
| | - Jung Hyun Kim
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul
- South Korea
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Gbadamosi AO, Junin R, Manan MA, Yekeen N, Agi A, Oseh JO. Recent advances and prospects in polymeric nanofluids application for enhanced oil recovery. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.05.020] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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On the shear stability of water-in-water Pickering emulsions stabilized with silica nanoparticles. J Colloid Interface Sci 2018; 532:83-91. [PMID: 30077068 DOI: 10.1016/j.jcis.2018.07.087] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 07/19/2018] [Accepted: 07/20/2018] [Indexed: 11/22/2022]
Abstract
HYPOTHESIS Water-in-water (w/w) emulsions are known for their low interfacial tensions (IFT) which makes their stability to shear questionable. This is because of low particle attachment energies, which can be just a few kT. Therefore, emulsions stabilized with larger particles should display greater stability to shear because of larger attachment energies (10-100 or more kT). This is typically not an issue with traditional oil-in-water Pickering emulsions because particle attachment energies are much larger due to higher interfacial tensions, even when very small particles are used. EXPERIMENTS Silica nanoparticles were silanized with 2-(methoxy(polyethyleneoxy)6-9propyl)trimethoxysilane (PEG-silane) to aid in emulsion stabilization. The phase behavior of an aqueous, two-phase system consisting of 20,000 g mol-1 polyethylene glycol (PEG) and magnesium sulfate (MgSO4) was characterized. Optical microscopy was used to characterize the static properties of the particle stabilized emulsions and shear rheology was used to study the stability of emulsions stabilized with 6 nm and 50 nm PEG-silane functionalized particles. RESULTS We demonstrated that silica nanoparticles silanized with PEG-silane can stabilize MgSO4 drops to produce MgSO4-in-PEG emulsions. We found emulsions stabilized with 6 wt% particles, regardless of particle size (6 nm or 50 nm), had similar viscosities, emulsion drop size, and were statically stable for one week. Emulsion drops stabilized with 6 wt% 50 nm particles doubled in size after 80 min of shear at 10 s-1 whereas those stabilized with 6 wt% 6 nm particles required only 25 min to double in size. We attribute these differences in doubling time to the larger particle attachment energies associated with the 50 nm particles.
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A State-of-the-Art Review of Nanoparticles Application in Petroleum with a Focus on Enhanced Oil Recovery. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8060871] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Pump E, Bendjeriou-Sedjerari A, Viger-Gravel J, Gajan D, Scotto B, Samantaray MK, Abou-Hamad E, Gurinov A, Almaksoud W, Cao Z, Lesage A, Cavallo L, Emsley L, Basset JM. Predicting the DNP-SENS efficiency in reactive heterogeneous catalysts from hydrophilicity. Chem Sci 2018; 9:4866-4872. [PMID: 29910939 PMCID: PMC5982197 DOI: 10.1039/c8sc00532j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/16/2018] [Indexed: 12/17/2022] Open
Abstract
Identification of surfaces at the molecular level has benefited from progress in dynamic nuclear polarization surface enhanced NMR spectroscopy (DNP SENS).
Identification of surfaces at the molecular level has benefited from progress in dynamic nuclear polarization surface enhanced NMR spectroscopy (DNP SENS). However, the technique is limited when using highly sensitive heterogeneous catalysts due to secondary reaction of surface organometallic fragments (SOMFs) with stable radical polarization agents. Here, we observe that in non-porous silica nanoparticles (NPs) (dparticle = 15 nm) some DNP enhanced NMR or SENS characterizations are possible, depending on the metal-loading of the SOMF and the type of SOMF substituents (methyl, isobutyl, neopentyl). This unexpected observation suggests that aggregation of the nanoparticles occurs in non-polar solvents (such as ortho-dichlorobenzene) leading to (partial) protection of the SOMF inside the interparticle space, thereby preventing reaction with bulky polarization agents. We discover that the DNP SENS efficiency is correlated with the hydrophilicity of the SOMF/support, which depends on the carbon and SOMF concentration. Nitrogen sorption measurements to determine the BET constant (CBET) were performed. This constant allows us to predict the aggregation of silica nanoparticles and consequently the efficiency of DNP SENS. Under optimal conditions, CBET > 60, we found signal enhancement factors of up to 30.
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Affiliation(s)
- Eva Pump
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Anissa Bendjeriou-Sedjerari
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Jasmine Viger-Gravel
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - David Gajan
- Institut de Sciences Analytiques (CNRS/ENS-Lyon/UCB-Lyon 1) , Université de Lyon , Centre de RMN à Très Hauts Champs , 69100 Villeurbanne , France
| | - Baptiste Scotto
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Manoja K Samantaray
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Edy Abou-Hamad
- King Abdullah University of Science and Technology (KAUST) , Core Labs , Thuwal , 23955-6900 , Saudi Arabia
| | - Andrei Gurinov
- King Abdullah University of Science and Technology (KAUST) , Core Labs , Thuwal , 23955-6900 , Saudi Arabia
| | - Walid Almaksoud
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Zhen Cao
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Anne Lesage
- Institut de Sciences Analytiques (CNRS/ENS-Lyon/UCB-Lyon 1) , Université de Lyon , Centre de RMN à Très Hauts Champs , 69100 Villeurbanne , France
| | - Luigi Cavallo
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Jean-Marie Basset
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
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48
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Priyananda P, Sabouri H, Jain N, Hawkett BS. Steric Stabilization of γ-Fe 2O 3 Superparamagnetic Nanoparticles in a Hydrophobic Ionic Liquid and the Magnetorheological Behavior of the Ferrofluid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3068-3075. [PMID: 29420049 DOI: 10.1021/acs.langmuir.7b04291] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Hydrophobic ionic liquid ferrofluids (ILFFs) are studied for use in electrospray thrusters for microsatellite propulsion under nonatmospheric and in high-temperature environments. We synthesized a hydrophobic ILFF by dispersing sterically stabilized γ-Fe2O3 nanoparticles (NPs) in the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. A diblock copolymer, C4-RAFT-AA10-DEAm60, was synthesized to facilitate multipoint bidentate anchoring to the NP through the acrylic acid block. The DEAm60 layer was incorporated to generate steric repulsion between particles to protect against the aggregation of magnetized particles arising from dipole-dipole attraction. The effect of shearing and variation in the magnetic field strength on the steric repulsion was examined using the DLVO theory. The effect of varying the magnetic field strength and particle concentration on the viscoelastic properties of the ferrofluid was evaluated using rheometry. The viscosity of the ferrofluid increased with the magnetic field strength, indicating that the magnetized particles assembled into a structure. The level of straining required to break down the structure formed by the magnetized particles increased with the magnetic field strength and particle concentration. The absence of particle interlocking during shearing was indicated by the smooth viscosity versus shear rate traces. The DLVO analysis showed that increasing the magnetic attraction between the particles causes the DEAm60 brush layers on the particles to overlap more, resulting in an increase in the steric repulsion. As overlapping increases, osmotic repulsion is caused before progressing to a strong elastic repulsion. The effect of the polymer solubility and particle interaction due to hydrodynamic forces on the steric repulsion was also analyzed.
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Affiliation(s)
| | - Hadi Sabouri
- University of Sydney , Camperdown , New South Wales 2006 , Australia
| | - Nirmesh Jain
- University of Sydney , Camperdown , New South Wales 2006 , Australia
| | - Brian S Hawkett
- University of Sydney , Camperdown , New South Wales 2006 , Australia
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49
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Liu J, Dai C, Hu Y. Aqueous aggregation behavior of citric acid coated magnetite nanoparticles: Effects of pH, cations, anions, and humic acid. ENVIRONMENTAL RESEARCH 2018; 161:49-60. [PMID: 29101829 DOI: 10.1016/j.envres.2017.10.045] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 09/29/2017] [Accepted: 10/25/2017] [Indexed: 05/26/2023]
Abstract
Improving the colloidal stability of magnetite nanoparticles (MNPs) is essential for their successful applications. In this study, the surface zeta potential and particle size evolutions of citric acid coated magnetite nanoparticles (CA-MNPs) were measured under varied aqueous conditions using dynamic light scattering (DLS). The effects of pH (5.0-9.0), ionic strength (IS), cations (Na+ and Ca2+), anions (phosphate, sulfate, and chloride) and humic acid on the aggregation behaviors of CA-MNPs were explored. Compared with bare MNPs, the stability of CA-MNPs were greatly improved over the typical pH range of natural aquatic environments (pH = 5.0-9.0), as the coated CA-MNPs were highly negatively charged over the pH range due to the low pKa1 value (3.13) of citrate acid. CA-MNPs were more stable in the presence of monovalent cation (Na+) compared with divalent cation (Ca2+), as Ca2+ could neutralize the surface charge of MNPs more significantly than Na+. In the presence of anions, the surface charges of CA-MNPs became more negative, and the stability of CA-MNPs followed the order: in phosphate > sulfate > chloride. The observed aggregation trend could be explained by the differences in the valences of the anions and their adsorption behaviors onto CA-MNPs, which altered the surface charges of CA-MNPs. The measured critical coagulation concentrations (CCC) values of CA-MNPs in these electrolyte solutions agreed well with Derjaguin-Landau-Verwey-Overbeek (DLVO) calculations. With the addition of Humic acid (HA), the aggregation of CA-MNPs was inhibited in all electrolyte solutions even with the critical coagulation concentrations. This is due to the adsorption of HA onto CA-MNPs, which enhanced the electrostatic and steric repulsive forces between CA-MNPs. Considering the good stability of CA-MNPs in solutions with varied pH and electrolyte compositions, as well as with the easy synthesis of CA-MNPs and their non-toxicity, this study suggested CA coating as a good strategy to increase the stability of MNPs.
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Affiliation(s)
- Juanjuan Liu
- Department of Civil & Environmental Engineering, University of Houston, Houston, TX 77004, United States; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chong Dai
- Department of Civil & Environmental Engineering, University of Houston, Houston, TX 77004, United States
| | - Yandi Hu
- Department of Civil & Environmental Engineering, University of Houston, Houston, TX 77004, United States.
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50
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Cao J, Song T, Zhu Y, Wang X, Wang S, Yu J, Ba Y, Zhang J. Aqueous hybrids of amino-functionalized nanosilica and acrylamide-based polymer for enhanced oil recovery. RSC Adv 2018; 8:38056-38064. [PMID: 35558622 PMCID: PMC9089851 DOI: 10.1039/c8ra07076h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 11/02/2018] [Indexed: 11/21/2022] Open
Abstract
Amino-functionalized nanosilica (ANS) was prepared using nanosilica (NS) and 3-aminopropyltriethoxysilane (APTES) aiming to reinforce the interaction between nanoparticles and polymer molecules. The copolymer of acrylamide, 2-acrylamido-2-methyl-1-propane sulfonic acid (PM), and four ANS samples with different NS to APTES ratios were synthesized. A series of nanoparticle/polymer hybrid systems were fabricated by introducing NS or ANS suspension into PM aqueous solution. The rheological properties and surface activities of these hybrid systems were studied in comparison with PM. The results indicate that the salt-tolerance and heat-resistance properties of PM solution were improved by the introduction of ANS particles. Moreover, the structures of ANS samples have a significant effect on the effectiveness of the nanoparticles due to the fact that the amine group density on the ANS surface can affect the strength of intermolecular interaction between nanoparticles and polymer molecules. Additionally, the better ability of the ANS sample with proper amine group density showed in reducing the oil/water interfacial tension over NS and other ANS samples made it a more promising chemical for enhancing oil recovery. The results from core flooding tests show that the PM/ANS system has the greatest oil recovery factor (16.30%), while the values for PM/NS and PM are 10.84% and 6.00%, respectively. The amino-functionalized nanosilica/polymer hybrid systems have better salt tolerance and EOR performance than unmodified nanosilica polymer hybrid systems.![]()
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Affiliation(s)
- Jie Cao
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Tao Song
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Yuejun Zhu
- CNOOC Research Institute
- Beijing 100027
- China
- State Key Lab of Offshore Oil Exploitation
- Beijing 100027
| | - Xiujun Wang
- CNOOC Research Institute
- Beijing 100027
- China
- State Key Lab of Offshore Oil Exploitation
- Beijing 100027
| | - Shanshan Wang
- CNOOC Research Institute
- Beijing 100027
- China
- State Key Lab of Offshore Oil Exploitation
- Beijing 100027
| | - Jingcheng Yu
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Yin Ba
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Jian Zhang
- CNOOC Research Institute
- Beijing 100027
- China
- State Key Lab of Offshore Oil Exploitation
- Beijing 100027
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