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Akakuru OU, Martin-Alarcon L, Bryant S, Trifkovic M. Unraveling Water-Based Lubrication with Carbon Dots of Asphaltene Origin. ACS Appl Mater Interfaces 2024; 16:16699-16711. [PMID: 38514399 DOI: 10.1021/acsami.4c00579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Despite the lower toxicity of water-based lubricants over nonrenewable petroleum-based analogues, they face challenges in achieving widespread adoption due to low stability and inadequate friction-reduction performance. To address this, a cost-effective nanoadditive is synthesized by expansive oxidation of asphaltenes to create biocompatible asphaltene-derived carbon dots [(ACDs); 5 nm]. These ACDs exhibit excellent water redispersibility, promoting long-term friction reduction and marking the first use of an asphaltene-based system for friction reduction in water or oil. Even at low loadings (0.2-4.0 wt %), ACDs significantly reduce friction on steel surfaces (>54%) with tribofilm stability surpassing pristine carbon dots, typical carbon-based graphene quantum dots, and inorganic nanomaterials (commercial 5 and 20 nm silica). The ACDs' attributes include high negative zeta potential, considerable water uptake, varied functional groups, biocompatibility, and a nanodisc shape conducive to stable tribofilm formation through effective particle stacking. The scalable synthesis, high yield, and impressive water redispersibility of ACDs position them favorably for commercial water-based lubrication.
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Affiliation(s)
- Ozioma Udochukwu Akakuru
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Alberta T2N 1N4, Canada
| | - Leonardo Martin-Alarcon
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Alberta T2N 1N4, Canada
| | - Steven Bryant
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Alberta T2N 1N4, Canada
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Alberta T2N 1N4, Canada
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2
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Abuhatab S, Pal S, Roberts EPL, Trifkovic M. Electrochemical Regeneration of Highly Stable and Sustainable Cellulose/Graphene Adsorbent Saturated with Dissolved Organic Dye. Langmuir 2024. [PMID: 38316141 DOI: 10.1021/acs.langmuir.3c03265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Electrochemical regeneration of adsorbents presents a cost-effective and environmentally friendly approach. Yet, its application to 3D structured adsorbents such as cellulose/graphene-based aerogels remains largely unexplored. This study introduces a method for producing these aerogels, highlighting their significant adsorption capacity for dissolved organic pollutants and resilience during electrochemical regeneration. By adjusting the ratio of hydrophobized cellulose nanofibers to graphene, the aerogels demonstrate a tunable adsorption capacity, ranging from 56 to 228 mg/g. Hydrophobization using oleic acid is vital for maintaining the aerogels' structural stability in water. Notably, the aerogels maintain structural integrity and efficiency over at least 18 electrochemical regeneration cycles, underscoring their potential for long-term environmental applications. The increase in adsorption capacity observed after regeneration cycles, approximately 10-20% by the fifth cycle, is attributed to electrochemical surface roughening and the creation of new adsorption sites. The tunability and durability of these aerogels offer a sustainable solution for adsorption with electrochemical regeneration technology.
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Affiliation(s)
- Saqr Abuhatab
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, Alberta T2N 1N4, Canada
| | - Sucharita Pal
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, Alberta T2N 1N4, Canada
| | - Edward P L Roberts
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, Alberta T2N 1N4, Canada
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, Alberta T2N 1N4, Canada
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Martin-Alarcon L, Govedarica A, Ewoldt RH, Bryant SL, Jay GD, Schmidt TA, Trifkovic M. Scale-Dependent Rheology of Synovial Fluid Lubricating Macromolecules. Small 2023:e2306207. [PMID: 38161247 DOI: 10.1002/smll.202306207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 11/20/2023] [Indexed: 01/03/2024]
Abstract
Synovial fluid (SF) is the complex biofluid that facilitates the exceptional lubrication of articular cartilage in joints. Its primary lubricating macromolecules, the linear polysaccharide hyaluronic acid (HA) and the mucin-like glycoprotein proteoglycan 4 (PRG4 or lubricin), interact synergistically to reduce boundary friction. However, the precise manner in which these molecules influence the rheological properties of SF remains unclear. This study aimed to elucidate this by employing confocal microscopy and multiscale rheometry to examine the microstructure and rheology of solutions containing recombinant human PRG4 (rhPRG4) and HA. Contrary to previous assumptions of an extensive HA-rhPRG4 network, it is discovered that rhPRG4 primarily forms stiff, gel-like aggregates. The properties of these aggregates, including their size and stiffness, are found to be influenced by the viscoelastic characteristics of the surrounding HA matrix. Consequently, the rheology of this system is not governed by a single length scale, but instead responds as a disordered, hierarchical network with solid-like rhPRG4 aggregates distributed throughout the continuous HA phase. These findings provide new insights into the biomechanical function of PRG4 in cartilage lubrication and may have implications in the development of HA-based therapies for joint diseases like osteoarthritis.
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Affiliation(s)
- Leonardo Martin-Alarcon
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Aleksandra Govedarica
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Randy H Ewoldt
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Steven L Bryant
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Gregory D Jay
- Department of Emergency Medicine - Warren Alpert Medical School & School of Engineering, Brown University, Providence, RI, 02912, USA
| | - Tannin A Schmidt
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
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Fuladpanjeh-Hojaghan B, Shah RS, Roberts EPL, Trifkovic M. Effect of polarity reversal on floc formation and rheological properties of a sludge formed by the electrocoagulation process. Water Res 2023; 242:120201. [PMID: 37336184 DOI: 10.1016/j.watres.2023.120201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/21/2023] [Accepted: 06/07/2023] [Indexed: 06/21/2023]
Abstract
Anode fouling is one of the key limiting factors to the widespread application of electrocoagulation (EC) for treatment of different types of contaminated water. Promising mitigation strategy to fouling is to operate the process under polarity reversal (PR) instead of direct current (DC). However, the PR operation comes at the cost of process complexity due to the alternation of electrochemical and chemical reactions. In this study, we systematically investigated the link between evolving fouling layer during DC and PR close to iron and aluminum electrodes and morphological and rheological properties of the formed sludge. By operando visualization of EC process, we demonstrate that during PR operation, precipitation of the iron and aluminum species occurs close to the anode interface, resulting in flocs with higher porosity and lower density than those formed under DC conditions. However, rheological investigation revealed that the PR conditions resulted in a sludge with more pronounced solid-like signature, but this enhancement in its viscoelastic properties is closely related to a period of the current's polarity reversal. We attribute this unexpected result to higher shear rate and collision of particles during PR conditions.
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Elsutohy MM, Fuladpanjeh-Hojaghan B, Roberts EPL, Trifkovic M. Mechanistic Insight into Electrode Processes by Operando Visualization of Interfacial pH Using Fluorescent Nanosensors. Environ Sci Technol 2023. [PMID: 37343244 DOI: 10.1021/acs.est.2c08763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/23/2023]
Abstract
Operando visualization of interfacial pH is crucial, yet challenging in electrochemical processes. Herein, we report the fabrication and utilization of ratiometric, fluorescent pH-sensitive nanosensors for operando quantification of fast-dynamic, interfacial pH changes in electrochemical processes and environments where unprotected fluorescent dyes would be degraded. Spatio-temporal pH changes were detected using an electrochemically coupled laser scanning confocal microscope (EC-LSCM) during the electrocoagulation treatment of model and field samples of oil-sands-produced water. Operando visualization of interfacial pH provided new insights into the electrode processes, including ion speciation, electrode fouling, and Faradaic efficiency. We provide compelling evidence that formed metal complexes precipitate at the edge of the pH boundary layer and that there is a strong coupling between the thickness of the interfacial pH layer and the electrode fouling. Furthermore, these findings provide a powerful pathway for optimizing the operating conditions, minimizing electrode passivation, and enhancing the efficiency of electrochemical processes, e.g., electrocoagulation, flow batteries, capacitive deionization, and electrolyzes.
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Affiliation(s)
- Mohamed M Elsutohy
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Behzad Fuladpanjeh-Hojaghan
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Edward P L Roberts
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta T2N 1N4, Canada
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Soltannia B, Martin-Alarcon L, Uhryn J, Govedarica A, Egberts P, Trifkovic M. Enhanced rheological and tribological properties of nanoenhanced greases by tuning interparticle contacts. J Colloid Interface Sci 2023; 645:560-569. [PMID: 37163802 DOI: 10.1016/j.jcis.2023.04.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/20/2023] [Accepted: 04/23/2023] [Indexed: 05/12/2023]
Abstract
HYPOTHESIS Despite the wide spectrum of available nanoparticles, their utilization in lubricant and grease formulations remains challenging. To enhance their performance, an improved link between the interparticle contacts, brittleness of the resulting particle network, time-dependent rheology and tribology is required. EXPERIMENTS We systematically changed interparticle contacts and examined their effect on the colloidal stability, microstructure, rheological and tribological behavior of model greases by investigating four types of nanoclays: montmorillonite (Cloisite Na+), oleic-acid functionalized Cloisite Na+ (OA-Cloisite Na+), organomodified montmorillonite (C20A) and oleic-acid functionalized C20A (C20A-OA). FINDINGS We observed a range of behaviors, starting from the lack of colloidal stability in greases derived with Cloisite Na+ and OA-Cloisite Na+ to semi-solid type systems with C20A and C20A-OA. Consistent with previous studies, the rheological and tribological properties of C20A systems scale with nanoclay loadings. Surprisingly, the functionalized C20A-OA system exhibited a delayed transition towards hydrodynamic lubrication, and enhanced lubrication properties, both of which were largely independent of nanoclay loadings. Coupled microstructural investigation and time-dependent rheology reveal that this behavior is governed by increasing repulsive forces, decreasing inter-particle friction between C20A-OA nanoparticles, and faster reorganization of the C20A-OA nanoparticle network under shear. Increased interparticle repulsion enables C20A-OA nanoclays to pass each other under shear and align in direction of shear, which reduces the overall viscosity, while the presence of OA on nanoclays decreases inter-particle friction and particle-steel surface friction.
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Affiliation(s)
- Babak Soltannia
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, T2N 1Y4, Alberta, Canada; Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, T2N 1Y4, Alberta, Canada
| | - Leonardo Martin-Alarcon
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, T2N 1Y4, Alberta, Canada
| | - Jackson Uhryn
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, T2N 1Y4, Alberta, Canada; Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, T2N 1Y4, Alberta, Canada
| | - Aleksandra Govedarica
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, T2N 1Y4, Alberta, Canada
| | - Philip Egberts
- Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, T2N 1Y4, Alberta, Canada.
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, T2N 1Y4, Alberta, Canada.
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Ganjeh-Anzabi P, Jahandideh H, Kedzior SA, Trifkovic M. Precise quantification of nanoparticle surface free energy via colloidal probe atomic force microscopy. J Colloid Interface Sci 2023; 641:404-413. [PMID: 36940596 DOI: 10.1016/j.jcis.2023.03.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 02/01/2023] [Accepted: 03/09/2023] [Indexed: 03/17/2023]
Abstract
Interfacial interactions of nanoparticles (NPs) in colloids are greatly influenced by the NP surface free energy (SFE). Due to the intrinsic physical and chemical heterogeneity of the NP surface, measuring SFE is nontrivial. The use of direct force measurement methods, such as colloidal probe atomic force microscopy (CP-AFM), have been proven to be effective for the determination of SFE on relatively smooth surfaces, but fail to provide reliable measurements for rough surfaces generated by NPs. Here, we developed a reliable approach to determine the SFE of NPs by adopting Persson's contact theory to include the effect of surface roughness on the measurements in CP-AFM experiments. We obtain the SFE for a range of materials varying in surface roughness and surface chemistry. The reliability of the proposed method is verified by the SFE determination of polystyrene. Subsequently, the SFE of bare and functionalized silica, graphene oxide, and reduced graphene oxide were quantified and validity of the results was demonstrated. The presented method unlocks the potential of CP-AFM as a robust and reliable method of the SFE determination of nanoparticles with a heterogeneous surface, which is challenging to obtain with conventionally implemented experimental techniques.
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Affiliation(s)
- Pejman Ganjeh-Anzabi
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
| | - Heidi Jahandideh
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
| | - Stephanie A Kedzior
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
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Bobrov G, Kedzior SA, Pervez SA, Govedarica A, Kloker G, Fichtner M, Michaelis VK, Bernard GM, Veelken PM, Hausen F, Trifkovic M. Coupling Particle Ordering and Spherulitic Growth for Long-Term Performance of Nanocellulose/Poly(ethylene oxide) Electrolytes. ACS Appl Mater Interfaces 2023; 15:1996-2008. [PMID: 36592370 DOI: 10.1021/acsami.2c16402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Development of lithium-ion batteries with composite solid polymer electrolytes (CPSEs) has attracted attention due to their higher energy density and improved safety compared to systems utilizing liquid electrolytes. While it is well known that the microstructure of CPSEs affects the ionic conductivity, thermal stability, and mechanical integrity/long-term stability, the bridge between the microscopic and macroscopic scales is still unclear. Herein, we present a systematic investigation of the distribution of TEMPO-oxidized cellulose nanofibrils (t-CNFs) in two different molecular weights of poly(ethylene oxide) (PEO) and its effect on Li+ ion mobility, bulk conductivity, and long-term stability. For the first time, we link local Li-ion mobility at the nanoscale level to the morphology of CPSEs defined by PEO spherulitic growth in the presence of t-CNF. In a low-MW PEO system, spherulites occupy a whole volume of the derived CPSE with t-CNF being incorporated in between lamellas, while their nuclei remain particle-free. In a high-MW PEO system, spherulites are scarce and their growth is arrested in a non-equilibrium cubic shape due to the strong t-CNF network surrounding them. Electrochemical strain microscopy and solid-state 7Li nuclear magnetic resonance spectroscopy confirm that t-CNF does not partake in Li+ ion transport regardless of its distribution within the polymer matrix. Free-standing CSPE films with low-MW PEO have higher conductivity but lack long-term stability due to the existence of uniformly distributed, particle-free, spherulite nuclei, which have very little resistance to Li dendrite growth. On the other hand, high-MW PEO has lower conductivity but demonstrates a highly stable Li cycling response for more than 1000 h at 0.2 mA/cm2 and 65 °C and more than 100 h at 85 °C. The study provides a direct link between the microscopic dynamic, Li-ion transport, bulk mechanical properties and long-term stability of the derived CPSE and, and as such, offers a pathway towards design of robust all-solid-state Li-metal batteries.
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Affiliation(s)
- Gleb Bobrov
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, ABT2N 1N4, Canada
| | - Stephanie A Kedzior
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, ABT2N 1N4, Canada
| | | | - Aleksandra Govedarica
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, ABT2N 1N4, Canada
| | - Gabriele Kloker
- Helmholtz Institute Ulm, Helmholtzstraße 11, Ulm89081, Germany
| | | | - Vladimir K Michaelis
- Faculty of Science - Chemistry, University of Alberta, 11227 Saskatchewan Drive NW, Edmonton, ABT6G 2G2, Canada
| | - Guy M Bernard
- Faculty of Science - Chemistry, University of Alberta, 11227 Saskatchewan Drive NW, Edmonton, ABT6G 2G2, Canada
| | - Philipp M Veelken
- Institute of Energy and Climate Research, IEK9, Forschungszentrum Juelich, Juelich52425, Germany
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, Aachen52074, Germany
| | - Florian Hausen
- Institute of Energy and Climate Research, IEK9, Forschungszentrum Juelich, Juelich52425, Germany
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, Aachen52074, Germany
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, ABT2N 1N4, Canada
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Kalyanaraman G, Rostami Najafabadi Z, Soares J, Trifkovic M. Flocculation Efficiency and Spatial Distribution of Water in Oil Sands Tailings Flocculated with a Partially Hydrophobic Graft Copolymer. ACS Appl Mater Interfaces 2021; 13:43726-43733. [PMID: 34473464 DOI: 10.1021/acsami.1c12546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This work investigates the effect of partially hydrophobic grafted polymers on flocculation and dewatering of oil sands mature fine tailings. Here, we combine confocal microscopy and rheology to investigate how the graft density of ethylene-propylene-diene grafted with hydrolyzed poly(methyl acrylate) (EPDM-g-HPMA) affects its dispersion in water and flocculation efficiency in terms of sediment solids content and long-term dewatering of oil sands tailings. Increasing the graft density from 30 to 50% makes the flocculant easier to disperse, increases the rate of initial dewatering, and also enhances the viscoelastic response of the flocculated sediments. Conversely, the long-term rheological properties of the flocculated sediments were similar for all flocculants. Tri-dimensional microscopic details of the spatial distribution of water within the flocculated sludge provide novel insights into the performance of the flocculants. Increasing the graft density in EPDM-g-HPMA traps more water within the individual flocs and, consequently, decreases the post-flocculation dewatering rate. Our systematic approach confirms the importance of the spatial distribution of water in the flocculated sediment, which depends on how the flocculant is dispersed and how it retains water in the flocs.
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Affiliation(s)
- Gayathri Kalyanaraman
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive, Calgary, Alberta T2N 1N4, Canada
| | - Zahra Rostami Najafabadi
- Department of Chemical and Materials Engineering, Donadeo Innovation Centre for Engineering, University of Alberta, 9211-116 Street NW, Edmonton, Alberta T6G 1H9, Canada
| | - João Soares
- Department of Chemical and Materials Engineering, Donadeo Innovation Centre for Engineering, University of Alberta, 9211-116 Street NW, Edmonton, Alberta T6G 1H9, Canada
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive, Calgary, Alberta T2N 1N4, Canada
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Mitra A, Trifkovic M, Ponnurangam S. Surface Functionalization-Induced Effects on Nanoparticle Dispersion and Associated Changes in the Thermophysical Properties of Polymer Nanocomposites. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00184] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Anindya Mitra
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Sathish Ponnurangam
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N 1N4, Canada
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Kumar S, Pandey A, Trifkovic M, Bryant SL. A facile and economical configuration for continuous generation and separation of oil in water emulsions. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117849] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Pan ZZ, Govedarica A, Nishihara H, Tang R, Wang C, Luo Y, Lv W, Kang FY, Trifkovic M, Yang QH. pH-Dependent Morphology Control of Cellulose Nanofiber/Graphene Oxide Cryogels. Small 2021; 17:e2005564. [PMID: 33350120 DOI: 10.1002/smll.202005564] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 11/23/2020] [Indexed: 06/12/2023]
Abstract
The precise control of the ice crystal growth during a freezing process is of essential importance for achieving porous cryogels with desired architectures. The present work reports a systematic study on the achievement of multi-structural cryogels from a binary dispersion containing 50 wt% 2,2,6,6-tetramethylpiperidin-1-oxyl, radical-mediated oxidized cellulose nanofibers (TOCNs), and 50 wt% graphene oxide (GO) via the unidirectional freeze-drying (UDF) approach. It is found that the increase in the sol's pH imparts better dispersion of the two components through increased electrostatic repulsion, while also causing progressively weaker gel networks leading to micro-lamella cryogels from the UDF process. At the pH of 5.2, an optimum between TOCN and GO self-aggregation and dispersion is achieved, leading to the strongest TOCN-GO interactions and their templating into the regular micro-honeycomb structures. A two-faceted mechanism for explaining the cryogel formation is proposed and it is shown that the interplay of the maximized TOCN-GO interactions and the high affinity of the dispersoid complexes for the ice crystals are necessary for obtaining a micro-honeycomb morphology along the freezing direction. Further, by linking the microstructure and rheology of the corresponding precursor sols, a diagram for predicting the microstructure of TOCN-GO cryogels obtained through the UDF process is proposed.
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Affiliation(s)
- Zheng-Ze Pan
- Engineering Laboratory for Functionalized Carbon Materials, Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
- School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan
| | - Aleksandra Govedarica
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, T2N1N4, Canada
| | - Hirotomo Nishihara
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan
| | - Rui Tang
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan
| | - Cong Wang
- Engineering Laboratory for Functionalized Carbon Materials, Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
- School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Yi Luo
- Engineering Laboratory for Functionalized Carbon Materials, Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
- School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Wei Lv
- Engineering Laboratory for Functionalized Carbon Materials, Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
| | - Fei-Yu Kang
- Engineering Laboratory for Functionalized Carbon Materials, Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
- School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, China
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, T2N1N4, Canada
| | - Quan-Hong Yang
- Nanoyang Group, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, China
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13
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Kedzior SA, Cranmer-Smith S, Behabtu N, Kim K, Lenges C, Bryant SL, Trifkovic M. Elucidating the effect of enzymatic polymerized polysaccharide particle morphology on emulsion properties. Carbohydr Polym 2021; 251:117112. [DOI: 10.1016/j.carbpol.2020.117112] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 09/11/2020] [Accepted: 09/12/2020] [Indexed: 01/04/2023]
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14
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Affiliation(s)
- Rajas Sudhir Shah
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary T2N 1N4, Canada
| | - Steven Bryant
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary T2N 1N4, Canada
- Canada Excellence Research Chair in Materials Engineering for Unconventional Oil Reservoirs, University of Calgary, Calgary T2N 1N4, Canada
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary T2N 1N4, Canada
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15
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Fuladpanjeh‐Hojaghan B, Elsutohy MM, Kabanov V, Heyne B, Trifkovic M, Roberts EPL. In‐Operando Mapping of pH Distribution in Electrochemical Processes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909238] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | | | - Vladimir Kabanov
- Department of ChemistryUniversity of Calgary 2500 University Drive NW Calgary AB Canada
| | - Belinda Heyne
- Department of ChemistryUniversity of Calgary 2500 University Drive NW Calgary AB Canada
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16
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Fuladpanjeh‐Hojaghan B, Elsutohy MM, Kabanov V, Heyne B, Trifkovic M, Roberts EPL. In‐Operando Mapping of pH Distribution in Electrochemical Processes. Angew Chem Int Ed Engl 2019; 58:16815-16819. [DOI: 10.1002/anie.201909238] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/10/2019] [Indexed: 01/18/2023]
Affiliation(s)
| | | | - Vladimir Kabanov
- Department of ChemistryUniversity of Calgary 2500 University Drive NW Calgary AB Canada
| | - Belinda Heyne
- Department of ChemistryUniversity of Calgary 2500 University Drive NW Calgary AB Canada
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17
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Kedzior SA, Kapadia W, Egberts P, Karan K, Trifkovic M, Bryant SL. In situ monitoring of the morphology evolution of interfacially-formed conductive nanocomposite films and their use as strain sensors. J Colloid Interface Sci 2019; 554:305-314. [PMID: 31302368 DOI: 10.1016/j.jcis.2019.07.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 07/05/2019] [Accepted: 07/07/2019] [Indexed: 10/26/2022]
Abstract
HYPOTHESIS Understanding and monitoring the film formation of interfacially formed layered films allows for the design of conductive nanocomposite films suitable for strain sensing. EXPERIMENTS To understand the mechanism of interfacial film formation, the hexane/water interface was monitored during the evaporation process via confocal laser scanning microscopy. Scanning electron microscopy and atomic force microscopy were utilized to investigate final film morphology. Tensile testing was used to determine their mechanical properties under uniaxial strain. FINDINGS Conductive nanocomposite films were formed at the hexane/water interface. Due to their low colloidal stability in hexane, the Vulcan carbon (VC) nanoparticles settled to the hexane/water interface prior to the onset of paraffin wax precipitation. Consequently, after the evaporation of hexane a two-layer structured film was formed. The bottom (water-facing, VC-rich) layer was conductive due to the existence of a percolated network of nanoparticle aggregates, while the top (hexane facing, paraffin-rich) layer was not conductive. The films showed high sensitivity for strains between 1% and 10%. We propose that the mechanism of strain sensing is similar to that of layer-structured sensors fabricated through embedding conductive nanofillers onto flexible polymeric substrates. The advantage of the films derived by the method proposed here is their ease of fabrication as well as their low cost.
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Affiliation(s)
- Stephanie A Kedzior
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| | - Wasim Kapadia
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| | - Philip Egberts
- Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| | - Kunal Karan
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| | - Steven L Bryant
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
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18
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Yoshida S, Trifkovic M. Unraveling the Effect of 3D Particle Localization on Coarsening Dynamics and Rheological Properties in Cocontinuous Polymer Blend Nanocomposites. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01437] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Shohei Yoshida
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
- Films & Film Products Research Laboratories, Toray Industries, Inc., 1-1, Sonoyama 1-chome, Otsu, Shiga 520-8558, Japan
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
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19
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Purkayastha SN, Gates ID, Trifkovic M. Integrated optimal design and scheduling for a bitumen upgrader facility. Comput Chem Eng 2019. [DOI: 10.1016/j.compchemeng.2019.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Lal G, Derakhshandeh M, Akhtar F, Spasyuk DM, Lin JB, Trifkovic M, Shimizu GKH. Mechanical Properties of a Metal–Organic Framework formed by Covalent Cross-Linking of Metal–Organic Polyhedra. J Am Chem Soc 2018; 141:1045-1053. [DOI: 10.1021/jacs.8b11527] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Garima Lal
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Maziar Derakhshandeh
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Farid Akhtar
- Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, Sweden
| | - Denis M. Spasyuk
- Canadian Light Source, 44 Innovation Blvd., Saskatoon, Saskatchewan S7N2V3, Canada
| | - Jian-Bin Lin
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
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21
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Pandey A, Derakhshandeh M, Kedzior SA, Pilapil B, Shomrat N, Segal-Peretz T, Bryant SL, Trifkovic M. Role of interparticle interactions on microstructural and rheological properties of cellulose nanocrystal stabilized emulsions. J Colloid Interface Sci 2018; 532:808-818. [DOI: 10.1016/j.jcis.2018.08.044] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 08/14/2018] [Accepted: 08/16/2018] [Indexed: 11/28/2022]
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22
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Jahandideh H, Ganjeh-Anzabi P, Bryant SL, Trifkovic M. The Significance of Graphene Oxide-Polyacrylamide Interactions on the Stability and Microstructure of Oil-in-Water Emulsions. Langmuir 2018; 34:12870-12881. [PMID: 30266070 DOI: 10.1021/acs.langmuir.8b02288] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The emulsification of oil in water by nanoparticles can be facilitated by the addition of costabilizers, such as polymers and surfactants. The enhanced properties of the resulting emulsions are usually attributed to nanoparticle/costabilizer synergy; however, the mechanism of this synergistic effect and its impacts on emulsion stability and microstructure remain unclear. Here, we study the synergistic interaction of graphene oxide (GO) and a high molecular weight anionic polyacrylamide (PAM) in stabilization of paraffin oil/water emulsion systems. We show that the addition of PAM reduces the amount of GO required to stabilize an emulsion significantly. In order to probe the synergistic effect of GO and PAM, we analytically analyze the oil-free GO and GO-PAM dispersions and directly image their morphology via Cryo-TEM and atomic force microscopy (AFM). X-ray diffraction results confirm the adsorption of PAM molecules onto GO sheets resulting in the formation of ultimate GO-PAM complexes. The adsorption phenomenon is a consequence of hydrogen bonding and acid-base interactions, conceivably leading to a resilient electron-donor-acceptor complex. The microstructure of emulsions is captured with two-color fluorescent microscopy and Cryo-TEM. The acquired images display the localization of GO-PAM complexes at the interface while large amount of GO-PAM flocs coexist at the interface and in between oil droplets. Localization of such complexes and flocs at the interface is found to be responsible for their slow creaming rates compared to their GO counterparts. Mechanical properties of both dispersions and emulsions are studied by shear rheology. Rheological measurements confirm that GO-PAM complexes have a higher desorption energy from the interface resulting in higher critical shear strain of GO-PAM emulsions. The results, with insights into both structure and rheology, form a foundational understanding for integration of other polymers and nanoparticles in emulsion systems, which enables efficient design of these systems for an application of interest.
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Affiliation(s)
- Heidi Jahandideh
- Department of Chemical and Petroleum Engineering , University of Calgary , 2500 University Drive N.W. , Calgary , Canada
| | - Pejman Ganjeh-Anzabi
- Department of Chemical and Petroleum Engineering , University of Calgary , 2500 University Drive N.W. , Calgary , Canada
| | - Steven L Bryant
- Department of Chemical and Petroleum Engineering , University of Calgary , 2500 University Drive N.W. , Calgary , Canada
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering , University of Calgary , 2500 University Drive N.W. , Calgary , Canada
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23
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Derakhshandeh M, Pilapil BK, Workman B, Trifkovic M, Bryant SL. Analysis of network formation and long-term stability in silica nanoparticle stabilized emulsions. Soft Matter 2018; 14:4268-4277. [PMID: 29557446 DOI: 10.1039/c7sm02457f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Emulsions are widely used in industrial applications, including in food sciences, cosmetics, and enhanced oil recovery. For these industries, an in depth understanding of the stability and rheological properties of emulsions under both static and dynamic conditions is vital to their successful application. Presented here is a thorough assessment of a model nanoparticle (NP) stabilized dodecane-in-water emulsion as a route to improved understanding of the relationship between NP properties, microstructure and droplet-droplet interactions on the stability and rheological properties of emulsions. Emulsions are obtained here with low NP loadings without the need for added electrolyte through the use of an optimized silica NP (SNP) surface modification procedure. The prepared emulsions were characterized via optical microscopy, cryo-scanning electron microscopy (cryo-SEM), zeta potential analysis and laser scanning confocal microscopy (LSCM), enabling quantification of the emulsion droplet size, SNP interfacial coverage/morphology and surface charge. The correlation of these properties with the rheology of the emulsions is investigated through small amplitude oscillatory shear experiments which provide significant insight into the origins of the emulsions' rheological behavior and their stability. In addition, long-term stability, droplet-droplet network formation and microstructural evolution are found to be readily detectable shortly after preparation through measured progression of the emulsion's rheological properties.
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Affiliation(s)
- Maziar Derakhshandeh
- University of Calgary, Department of Chemical and Petroleum Engineering, 2500 University Dr NW Calgary, AB T2N 1N4, Canada.
| | - Brandy K Pilapil
- University of Calgary, Department of Chemical and Petroleum Engineering, 2500 University Dr NW Calgary, AB T2N 1N4, Canada.
| | - Ben Workman
- University of Calgary, Department of Chemical and Petroleum Engineering, 2500 University Dr NW Calgary, AB T2N 1N4, Canada.
| | - Milana Trifkovic
- University of Calgary, Department of Chemical and Petroleum Engineering, 2500 University Dr NW Calgary, AB T2N 1N4, Canada.
| | - Steven L Bryant
- University of Calgary, Department of Chemical and Petroleum Engineering, 2500 University Dr NW Calgary, AB T2N 1N4, Canada.
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24
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Affiliation(s)
- Sagar N. Purkayastha
- Dept. of Chemical and Petroleum Engineering; University of Calgary; AB T2N 1N4 Canada
| | - Ian D. Gates
- Dept. of Chemical and Petroleum Engineering; University of Calgary; AB T2N 1N4 Canada
| | - Milana Trifkovic
- Dept. of Chemical and Petroleum Engineering; University of Calgary; AB T2N 1N4 Canada
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25
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Ozhukil Kollath V, Derakhshandeh M, Mayer FD, Mudigonda T, Islam MN, Trifkovic M, Karan K. Fluorescent polycatecholamine nanostructures as a versatile probe for multiphase systems. RSC Adv 2018; 8:31967-31971. [PMID: 35547475 PMCID: PMC9085718 DOI: 10.1039/c8ra05372c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/17/2018] [Indexed: 11/21/2022] Open
Abstract
Shape and size controlled nanostructures are critical for nanotechnology and have versatile applications in understanding interfacial phenomena of various multi-phase systems. Facile synthesis of fluorescent nanostructures remains a challenge from conventional precursors. In this study, bio-inspired catecholamines, dopamine (DA), epinephrine (EP) and levodopa (LDA), were used as precursors and fluorescent nanostructures were synthesized via a simple one pot method in a water–alcohol mixture under alkaline conditions. DA and EP formed fluorescent spheres and petal shaped structures respectively over a broad spectrum excitation wavelength, whereas LDA did not form any particular structure. However, the polyepinephrine (PEP) micropetals were formed by weaker interactions as compared to covalently linked polydopamine (PDA) nanospheres, as revealed by NMR studies. Application of these fluorescent structures was illustrated by their adsorption behavior at the oil/water interface using laser scanning confocal microscopy. Interestingly, PDA nanospheres showed complete coverage of the oil/water interface despite its hydrophilic nature, as compared to hydrophobic PEP micropetals which showed a transient coverage of the oil/water interface but mainly self-aggregated in the water phase. The reported unique fluorescent organic structures will play a key role in understanding various multi-phase systems used in aerospace, biomedical, electronics and energy applications. Shape and size controlled nanostructures are critical for nanotechnology and have versatile applications in understanding interfacial phenomena of various multi-phase systems.![]()
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Affiliation(s)
| | - Maziar Derakhshandeh
- Department of Chemical and Petroleum Engineering
- The University of Calgary
- Calgary
- Canada
| | - Francis D. Mayer
- Department of Chemical and Petroleum Engineering
- The University of Calgary
- Calgary
- Canada
| | - Thanmayee Mudigonda
- Department of Chemical and Petroleum Engineering
- The University of Calgary
- Calgary
- Canada
| | | | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering
- The University of Calgary
- Calgary
- Canada
| | - Kunal Karan
- Department of Chemical and Petroleum Engineering
- The University of Calgary
- Calgary
- Canada
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26
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Hoseini AHA, Arjmand M, Sundararaj U, Trifkovic M. Tunable electrical conductivity of polystyrene/polyamide-6/carbon nanotube blend nanocomposites via control of morphology and nanofiller localization. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.08.037] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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Pilapil BK, Jahandideh H, Bryant SL, Trifkovic M. Stabilization of Oil-in-Water Emulsions with Noninterfacially Adsorbed Particles. Langmuir 2016; 32:7109-7116. [PMID: 27351486 DOI: 10.1021/acs.langmuir.6b00873] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Classical (surfactant stabilized) and Pickering (particle stabilized) type emulsions have been widely studied to elucidate the mechanisms by which emulsion stabilization is achieved. In Pickering emulsions, a key defining factor is that the stabilizing particles reside at the liquid-liquid interface providing a mechanical barrier to droplet coalescence. This interfacial adsorption is achieved through the use of nanoparticles that are partially wet by both liquid phases, often through covalent surface modification of or surfactant adsorption to the nanoparticle surfaces. Herein, we demonstrate particle-induced stabilization of an oil-in-water emulsion with fully water wet nanoparticles (no interfacial adsorption) via synergistic interaction with low concentrations of surfactants. Laser scanning confocal microscopy analysis allows for unique and vital insights into the properties of these emulsions via both three-dimensional imaging and real-time monitoring of particle dynamics at the oil-water interface. Investigation of these "non-Pickering" particle stabilized emulsions suggests that the nonadsorbed particles impart stability to the emulsion primarily via entropic forces imparted by the accumulation of silica nanoparticles in the coherent phase between dispersed oil droplets.
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Affiliation(s)
- Brandy K Pilapil
- Department of Chemical and Petroleum Engineering, University of Calgary , 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
| | - Heidi Jahandideh
- Department of Chemical and Petroleum Engineering, University of Calgary , 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
| | - Steven L Bryant
- Department of Chemical and Petroleum Engineering, University of Calgary , 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
| | - Milana Trifkovic
- Department of Chemical and Petroleum Engineering, University of Calgary , 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
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28
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Huang S, Bai L, Trifkovic M, Cheng X, Macosko CW. Controlling the Morphology of Immiscible Cocontinuous Polymer Blends via Silica Nanoparticles Jammed at the Interface. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00212] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sijia Huang
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Lian Bai
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Milana Trifkovic
- Department
of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Xiang Cheng
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Christopher W. Macosko
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
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29
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30
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Affiliation(s)
- Milana Trifkovic
- Department
of Chemical Engineering and Petroleum Engineering, University of Calgary, Calgary, Alberta Canada T2N 1N4
| | - Aaron T. Hedegaard
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Mehdi Sheikhzadeh
- Instrumentation & Control Engineering Technology, Lambton College, Sarnia, Canada N7S 6K4
| | - Sijia Huang
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Christopher W. Macosko
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
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31
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Affiliation(s)
- Milana Trifkovic
- Dept. of Chemical and Petroleum Engineering; University of Calgary; Calgary AB Canada T2N 1N4
| | - W. Alex Marvin
- Dept. of Chemical Engineering and Materials Science; University of Minnesota; Minneapolis MN 55455
| | - Prodromos Daoutidis
- Dept. of Chemical Engineering and Materials Science; University of Minnesota; Minneapolis MN 55455
| | - Mehdi Sheikhzadeh
- Dept. of Instrumentation and Control; Lambton College; Sarnia ON Canada N7S 6K4
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32
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Thomassin JM, Trifkovic M, Alkarmo W, Detrembleur C, Jérôme C, Macosko C. Poly(methyl methacrylate)/Graphene Oxide Nanocomposites by a Precipitation Polymerization Process and Their Dielectric and Rheological Characterization. Macromolecules 2014. [DOI: 10.1021/ma500164s] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jean-Michel Thomassin
- Center for Education and Research on Macromolecules
(CERM), University of Liege, Sart-Tilman, B6, 4000 Liege, Belgium
| | - Milana Trifkovic
- Chemical and Petroleum
Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Walid Alkarmo
- Center for Education and Research on Macromolecules
(CERM), University of Liege, Sart-Tilman, B6, 4000 Liege, Belgium
| | - Christophe Detrembleur
- Center for Education and Research on Macromolecules
(CERM), University of Liege, Sart-Tilman, B6, 4000 Liege, Belgium
| | - Christine Jérôme
- Center for Education and Research on Macromolecules
(CERM), University of Liege, Sart-Tilman, B6, 4000 Liege, Belgium
| | - Christopher Macosko
- Chemical Engineering
and Material Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
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33
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Affiliation(s)
- Milana Trifkovic
- Department of Chemical Engineering
and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Aaron Hedegaard
- Department of Chemical Engineering
and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Kyle Huston
- Department of Chemical Engineering
and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Mehdi Sheikhzadeh
- Instrumentation & Control Engineering Technology, Lambton College, Sarnia, Canada N7S 6K4
| | - Christopher W. Macosko
- Department of Chemical Engineering
and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
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34
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Trifkovic M, Sheikhzadeh M, Choo K, Rohani S. Experimental and statistical study of the effects of material properties, curing agents, and process variables on the production of thermoplastic vulcanizates. J Appl Polym Sci 2010. [DOI: 10.1002/app.32316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Trifkovic M, Sheikhzadeh M, Choo K, Rohani S. Model identification of a twin screw extruder for thermoplastic vulcanizate (TPV) applications. POLYM ENG SCI 2009. [DOI: 10.1002/pen.21646] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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36
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Trifkovic M, Sheikhzadeh M, Rohani S. Multivariable real-time optimal control of a cooling and antisolvent semibatch crystallization process. AIChE J 2009. [DOI: 10.1002/aic.11868] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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37
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Trifkovic M, Sheikhzadeh M, Rohani S. Kinetics Estimation and Single and Multi-Objective Optimization of a Seeded, Anti-Solvent, Isothermal Batch Crystallizer. Ind Eng Chem Res 2008. [DOI: 10.1021/ie071125g] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Trifkovic
- Department of Chemical and Biochemical Engineering The University of Western Ontario London, Ontario, N6A 5B9, Canada
| | - M. Sheikhzadeh
- Department of Chemical and Biochemical Engineering The University of Western Ontario London, Ontario, N6A 5B9, Canada
| | - S. Rohani
- Department of Chemical and Biochemical Engineering The University of Western Ontario London, Ontario, N6A 5B9, Canada
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38
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40
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Affiliation(s)
- Milana Trifkovic
- Department of Chemical and Biochemical of Engineering, The University of Western Ontario, London, Ontario N6A 5B9, Canada
| | - Sohrab Rohani
- Department of Chemical and Biochemical of Engineering, The University of Western Ontario, London, Ontario N6A 5B9, Canada
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