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Hernández-Cifre JG, Rodríguez-Schmidt R, Almagro-Gómez CM, García de la Torre J. Calculation of the friction, diffusion and sedimentation coefficients of nanoplatelets of arbitrary shape. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125467] [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: 11/09/2022]
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2
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Nguyen MK, Trung LG, Nguyen HH, Tran NT. Preparation of Al(OH)3-based layered structural material by shear alignment from aqueous dispersion of colloidal gibbsite platelets. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Wu Q, Guo H, Hua T, Zhao L, Li L, Qian B. Preparation of graphene oxide liquid crystals with long-range highly-ordered flakes using a coat-hanger die. RSC Adv 2021; 11:15085-15090. [PMID: 35424075 PMCID: PMC8698725 DOI: 10.1039/d1ra01241j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 04/04/2021] [Indexed: 01/14/2023] Open
Abstract
Graphene oxide (GO) was discovered as a liquid crystalline (LC) phase formation in its water dispersion and expanded to a large number of applications, such as highly ordered GO sheets papers, films, and foams. However, there are still few efficient ways to prepare graphene oxide liquid crystals (GOLCs) with long-range highly ordered flakes. In this work, after carefully studying the rheological properties of GO aqueous dispersions at different concentrations, we have provided a new method to prepare holistically-oriented GOLCs through a designed coat-hanger die. Further, by simulating the extrusion process in the slot of the coat-hanger die, the die's dimensional sizes were optimized to apply efficient shear force on GO dispersions. Then, GOLCs with long-range highly ordered flakes of different GO concentrations were prepared using this method. Finally, a GO foam with a highly ordered structure was prepared using a layer-by-layer method, which exhibited improved conductivity compared to that of normal disordered GO foams after chemical reduction.
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Affiliation(s)
- Qixin Wu
- School of Nano Technology and Nano Bionics, University of Science and Technology of China China
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences China
| | - Hao Guo
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences China
| | - Tianxiang Hua
- School of Nano Technology and Nano Bionics, University of Science and Technology of China China
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences China
| | - Lilan Zhao
- School of Nano Technology and Nano Bionics, University of Science and Technology of China China
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences China
| | - Lingying Li
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences China
| | - Bo Qian
- School of Nano Technology and Nano Bionics, University of Science and Technology of China China
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences China
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Li C, Wu Q, Petit S, Gates WP, Yang H, Yu W, Zhou C. Insights into the Rheological Behavior of Aqueous Dispersions of Synthetic Saponite: Effects of Saponite Composition and Sodium Polyacrylate. Langmuir 2019; 35:13040-13052. [PMID: 31513416 DOI: 10.1021/acs.langmuir.9b01805] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Synthetic saponite (Sap) easily delaminates in water to form a transparent sol and hydrogel with excellent rheological performance and is thus widely used in paints, cosmetics, and nanomaterials. The thixotropic property of Sap hydrogels is heavily dependent on the nature of Sap and the external electrolyte and polyelectrolyte; yet, details on the relationship between rheological behaviors of saponite hydrogels and Sap composition and polyelectrolyte remain unclear. In this work, thixotropic rheological behaviors of a series of synthetic Sap hydrogels, with and without added sodium polyacrylate polyelectrolyte (NaPA), were investigated. The Sap samples, with a Si/Al molar ratio from 5 to 25, were successfully synthesized using hydrothermal methods and characterized by powder X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. The rheological performances of aqueous Sap dispersions and particle sizes and ζ-potentials of Sap were measured. The results showed that the crystallinity of the Sap increased with an increasing Si/Al molar ratio. All Sap samples, with the exception of the Sap with a Si/Al molar ratio of 5, dispersed well in water (3 wt %) to form hydrogels. The rheological behaviors of the hydrogels were related to the chemical composition and the layer charge of the Sap. The Sap with a Si/Al molar ratio of 25 had higher viscosity due to improved delamination. The addition of the NaPA, an anionic polyelectrolyte, into the hydrogels decreased the viscosity and altered the thixotropic properties such that the hydrogel becomes a sol. The addition of NaPA facilitated the dispersion and delamination of Sap, because under the electric field of negatively charged Sap particles in the hydrogel, the anionic NaPA was instantaneously polarized and thereby entered the hydration layer of the Sap particles.
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Affiliation(s)
- Cunjun Li
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310032 , China
- College of Materials Science and Engineering , Guilin University of Technology , Guilin 541004 , China
| | - Qiqi Wu
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310032 , China
| | - Sabine Petit
- Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), UMR 7285 CNRS , Université de Poitiers , Poitiers Cedex 9 86073 , France
| | - Will P Gates
- Institute for Frontier Materials , Deakin University Melbourne-Burwood , Burwood , Victoria 3125 , Australia
| | - Huimin Yang
- Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province , China National Bamboo Research Center , Hangzhou 310012 , China
| | - Weihua Yu
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310032 , China
- Zhijiang College , Zhejiang University of Technology , Shaoxing 312030 , China
| | - Chunhui Zhou
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310032 , China
- Qing Yang Institute for Industrial Minerals , You Hua, Qing Yang , Chi Zhou 242804 , China
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Abedin MJ, Gamot TD, Martin ST, Ali M, Hassan KI, Mirshekarloo MS, Tabor RF, Green MJ, Majumder M. Graphene Oxide Liquid Crystal Domains: Quantification and Role in Tailoring Viscoelastic Behavior. ACS Nano 2019; 13:8957-8969. [PMID: 31314988 DOI: 10.1021/acsnano.9b02830] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Graphene oxide liquid crystals (GOLCs) were exfoliated in a wide variety of solvents (water, ethylene glycol (EG), N-methyl-2-pyrrolidone (NMP), and dimethylformamide (DMF)) by high-speed shearing of graphite oxide. Quantitative polarized light imaging of the equilibrium nematic phases of the lyotropic GOLCs gives insights into the extent of aggregation and quantifiable textural features such as domain size, d. Large nematic domains >100 μm with a high overall degree of order were obtained in water and ethylene glycol, in contrast to ∼5-50 μm domains in NMP and DMF at comparable volume fractions. Comprehensive rheological studies of these GOLCs indicate that larger domains correlate with higher viscosity and higher elasticity, and scaling analysis shows a power-law dependence of the Ericksen number (Er) with domain size (Er ∝ d3.09). The improved understanding of the relationship between the microstructure and flow properties of GOLCs leads us to an approach of mixed solvent-based GOLCs as a means to tune viscoelastic properties. We demonstrate this approach for the formation of shear-aligned GOLC films for advanced flexible electronic applications such as all-carbon conductive films and thermal heaters.
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Affiliation(s)
| | | | | | | | | | | | | | - Micah J Green
- Artie McFerrin Department of Chemical Engineering , Texas A&M University , College Station , Texas 77843 , United States
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Magzoub MI, Hussein IA, Nasser MS, Mahmoud M, Sultan AS, Benamor A. An Investigation of the Swelling Kinetics of Bentonite Systems Using Particle Size Analysis. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1612758] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Musaab I. Magzoub
- Gas Processing Center, College of Engineering, Qatar University, Doha, Qatar
| | | | - Mustafa S. Nasser
- Gas Processing Center, College of Engineering, Qatar University, Doha, Qatar
| | - Mohamed Mahmoud
- Petroleum Engineering Department, College of Petroleum and Geosciences, KFUPM, Dhahran, Saudi Arabia
| | - Abdullah S. Sultan
- Petroleum Engineering Department, College of Petroleum and Geosciences, KFUPM, Dhahran, Saudi Arabia
| | - Abdelbaki Benamor
- Gas Processing Center, College of Engineering, Qatar University, Doha, Qatar
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Gruhn T, Pogorelov E, Seiferling F, Emmerich H. Analyzing spinodal decomposition of an anisotropic fluid mixture. J Phys Condens Matter 2017; 29:055103. [PMID: 27941222 DOI: 10.1088/1361-648x/aa4de0] [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: 06/06/2023]
Abstract
Spinodal decomposition leads to spontaneous fluctuations of the local concentration. In the early stage, the resulting pattern provides explicit information about the material properties of the mixture. In the case of two isotropic fluids, the static structure factor shows the characteristic ring shape. If one component is a liquid crystal, the pattern is typically anisotropic and the structure factor is more complex. Using numerical methods, we investigate how structure factors can be used to extract information about material properties like the diffusion constant or the isotropic and the anisotropic contributions to the interfacial tension. The method is based on momenta taken from structure factors in the early stage of the spinodal demixing. We perform phase field calculations for an isotropic and an anisotropic spinodal decomposition. A comparison of the extracted results with analytic values is made. The calculations show that linear modes dominate in the beginning of the growth process, while non-linear modes grow monotonously in the region of the k-space for which damping is predicted by the linearized theory. As long as non-linear modes are small enough, linearized theory can be applied to extract material properties from the structure factor.
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Affiliation(s)
- Thomas Gruhn
- Materials and Process Simulation (MPS), University of Bayreuth, Germany
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Gooneie A, Schuschnigg S, Holzer C. Dissipative Particle Dynamics Models of Orientation of Weakly-Interacting Anisometric Silicate Particles in Polymer Melts under Shear Flow: Comparison with the Standard Orientation Models. MACROMOL THEOR SIMUL 2016. [DOI: 10.1002/mats.201500086] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ali Gooneie
- Chair of Polymer Processing; Department of Polymer Engineering and Science; Montanuniversität Leoben; Otto Glöckel-Straße 2 8700 Leoben Austria
| | - Stephan Schuschnigg
- Chair of Polymer Processing; Department of Polymer Engineering and Science; Montanuniversität Leoben; Otto Glöckel-Straße 2 8700 Leoben Austria
| | - Clemens Holzer
- Chair of Polymer Processing; Department of Polymer Engineering and Science; Montanuniversität Leoben; Otto Glöckel-Straße 2 8700 Leoben Austria
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Gooneie A, Schuschnigg S, Holzer C. Orientation of Anisometric Layered Silicate Particles in Uncompatibilized and Compatibilized Polymer Melts Under Shear Flow: A Dissipative Particle Dynamics Study: Orientation of Anisometric Layered Silicate Particles. MACROMOL THEOR SIMUL 2016; 25:85-98. [DOI: 10.1002/mats.201500045] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ganley WJ, van Duijneveldt JS. Controlling Clusters of Colloidal Platelets: Effects of Edge and Face Surface Chemistries on the Behavior of Montmorillonite Suspensions. Langmuir 2015; 31:4377-4385. [PMID: 25815435 DOI: 10.1021/acs.langmuir.5b00047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The structural and rheological consequences of adsorbing pyrophosphate anions to the edges and polyetheramines to the faces of montmorillonite platelets in aqueous suspension were investigated. Oscillatory rheology and scattering experiments showed that the two surface treatments act in different regions of the phase diagram and that this can be attributed to modifications of local particle interactions resulting in changes to the behavior and morphology of platelet clusters. The polyetheramine was found to neutralize surface charge, reducing electrostatic repulsion between platelets and therefore allowing them to come into closer proximity. This reduces the effective volume fraction of the clusters and reverses jamming in low ionic strength arrested phases. Conversely, the adsorption of pyrophosphate was found to introduce a high concentration of negative charge to the particle edge, resisting the formation of bonded percolating gels at high ionic strength. The two separate surface chemistries can be applied in parallel with no adverse effects and thus have the potential to be applied to dual functionalization of two-dimensional colloids such as platelets. This has implications for finer formulation design where targeted rheology modification could be achieved by careful selection of chemistry at one surface accompanied by an additional function at the other.
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Affiliation(s)
- William J Ganley
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, U.K
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Bailey L, Lekkerkerker HNW, Maitland GC. Smectite clay--inorganic nanoparticle mixed suspensions: phase behaviour and rheology. Soft Matter 2015; 11:222-36. [PMID: 25435312 DOI: 10.1039/c4sm01717j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Smectite clay minerals and their suspensions have long been of both great scientific and applications interest and continue to display a remarkable range of new and interesting behaviour. Recently there has been an increasing interest in the properties of mixed suspensions of such clays with nanoparticles of different size, shape and charge. This review aims to summarize the current status of research in this area focusing on phase behaviour and rheological properties. We will emphasize the rich range of data that has emerged for these systems and the challenges they present for future investigations. The review starts with a brief overview of the behaviour and current understanding of pure smectite clays and their suspensions. We then cover the work on smectite clay-inorganic nanoparticle mixed suspensions according to the shape and charge of the nanoparticles - spheres, rods and plates either positively or negatively charged. We conclude with a summary of the overarching trends that emerge from these studies and indicate where gaps in our understanding need further research for better understanding the underlying chemistry and physics.
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Affiliation(s)
- Louise Bailey
- Schlumberger Gould Research, High Cross, Madingley Road, Cambridge, CB3 0EL, UK.
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De Meirleir N, Pellens L, Broeckx W, van Assche G, De Malsche W. The rheological properties of hydrogenated castor oil crystals. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3298-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Yang X, Guo C, Ji L, Li Y, Tu Y. Liquid crystalline and shear-induced properties of an aqueous solution of graphene oxide sheets. Langmuir 2013; 29:8103-7. [PMID: 23755877 DOI: 10.1021/la401038c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We demonstrated here the lyotropic liquid crystalline behavior of an aqueous solution of graphene oxide (GO) sheets. Scanning electron microscope experiments revealed GO sheets self-assembled into fiber-like or sheet-like structures at different concentrations under flow conditions. As a result, the solution viscosity decreased dramatically with increasing shear stress.
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Affiliation(s)
- Xiaoming Yang
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
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