1
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Ishraaq R, Das S. All-atom molecular dynamics simulations of polymer and polyelectrolyte brushes. Chem Commun (Camb) 2024; 60:6093-6129. [PMID: 38819435 DOI: 10.1039/d4cc01557f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Densely grafted polymer and polyelectrolyte (PE) brushes, owing to their significant abilities to functionalize surfaces for a plethora of applications in sensing, diagnostics, current rectification, surface wettability modification, drug delivery, and oil recovery, have attracted significant attention over the past several decades. Unfortunately, most of the attention has primarily focused on understanding the properties of the grafted polymer and the PE chains with little attention devoted to studying the behavior of the brush-supported ions (counterions needed to screen the PE chains) and water molecules. Over the past few years, our group has been at the forefront of addressing this gap: we have employed all-atom molecular dynamics (MD) simulations for studying a wide variety of polymer and PE brush systems with specific attention to unraveling the properties and behavior of the brush-supported water molecules and ions. Our findings have revealed some of the most fascinating properties of such brush-supported ions and water molecules, including the most remarkable control of nanofluidic transport afforded by the specific ion and water responses induced by the PE brushes grafted on the inner walls of the nanochannel. This feature article aims to summarize some of our key contributions associated with such atomistic simulations of polymer and PE brushes and brush-supported water molecules and counterions.
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Affiliation(s)
- Raashiq Ishraaq
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA.
| | - Siddhartha Das
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA.
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2
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Zhao JQ, Gao T, Du JJ, Shi J. Future Trends in Obolodiplosis robiniae Distribution across Eurasian Continent under Global Climate Change. INSECTS 2023; 14:48. [PMID: 36661975 PMCID: PMC9861275 DOI: 10.3390/insects14010048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/31/2022] [Accepted: 01/01/2023] [Indexed: 06/17/2023]
Abstract
Obolodiplosis robiniae was discovered in Eurasia at the beginning of the 21st century. In this study, we explore the present and future (in the years 2050 and 2070) trends in the potential distribution of O. robiniae in Eurasia under diverse climate change scenarios based on a maximum entropy model. Our findings indicated that the current potential distribution area of O. robiniae is within the range of 21°34' and 65°39' N in the Eurasian continent. The primary factor controlling the distribution of O. robiniae is temperature. The highly and moderately suitable areas are mainly distributed in the semi-humid and semi-arid regions, which also happen to be the locations where the host black locust (Robinia pseudoacacia L.) grows at its fastest rate. The forecast of the potential distribution area of O. robiniae revealed that the species would benefit from global warming. The region suitable for the habitat of O. robiniae is characterized by a large-scale northward expansion trend and an increase in temperature. This information would help the forestry quarantine departments of Asian and European countries provide early warnings on the probable distribution areas of O. robiniae and provide a scientific basis for the prevention and control of O. robiniae spread and outbreaks.
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Affiliation(s)
- Jia-Qiang Zhao
- Sino-French Joint Laboratory for Invasive Forest Pests in Eurasia, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory for Forest Pest Control, Beijing Forestry University, Beijing 100083, China
| | - Tai Gao
- State Key Laboratory of Rice Biology, Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jing-Jing Du
- Sino-French Joint Laboratory for Invasive Forest Pests in Eurasia, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory for Forest Pest Control, Beijing Forestry University, Beijing 100083, China
| | - Juan Shi
- Sino-French Joint Laboratory for Invasive Forest Pests in Eurasia, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory for Forest Pest Control, Beijing Forestry University, Beijing 100083, China
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3
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Santo KP, Neimark AV. Dissipative particle dynamics simulations in colloid and Interface science: a review. Adv Colloid Interface Sci 2021; 298:102545. [PMID: 34757286 DOI: 10.1016/j.cis.2021.102545] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 12/31/2022]
Abstract
Dissipative particle dynamics (DPD) is one of the most efficient mesoscale coarse-grained methodologies for modeling soft matter systems. Here, we comprehensively review the progress in theoretical formulations, parametrization strategies, and applications of DPD over the last two decades. DPD bridges the gap between the microscopic atomistic and macroscopic continuum length and time scales. Numerous efforts have been performed to improve the computational efficiency and to develop advanced versions and modifications of the original DPD framework. The progress in the parametrization techniques that can reproduce the engineering properties of experimental systems attracted a lot of interest from the industrial community longing to use DPD to characterize, help design and optimize the practical products. While there are still areas for improvements, DPD has been efficiently applied to numerous colloidal and interfacial phenomena involving phase separations, self-assembly, and transport in polymeric, surfactant, nanoparticle, and biomolecules systems.
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Affiliation(s)
- Kolattukudy P Santo
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, United States
| | - Alexander V Neimark
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, United States.
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4
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Kadre D, Iyer BVS. Modeling Local Oscillatory Shear Dynamics of Functionalized Polymer Grafted Nanoparticles. MACROMOL THEOR SIMUL 2021. [DOI: 10.1002/mats.202100005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Diksha Kadre
- Department of Chemical Engineering Indian Institute of Technology Hyderabad 502285 India
| | - Balaji V. S. Iyer
- Department of Chemical Engineering Indian Institute of Technology Hyderabad 502285 India
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5
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Paiva FL, Secchi AR, Calado V, Maia J, Khani S. Shear Flow and Relaxation Behaviors of Entangled Viscoelastic Nanorod-Stabilized Immiscible Polymer Blends. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00030] [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)
- Felipe L. Paiva
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, Ohio 44106, United States
- School of Chemistry, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rua Horácio Macedo 2030, Rio de Janeiro, RJ 21941-909, Brazil
| | - Argimiro R. Secchi
- Chemical Engineering Graduate Program (COPPE), Universidade Federal do Rio de Janeiro, Cidade Universitária, Rua Horácio Macedo 2030, Rio de Janeiro, RJ 21941-909, Brazil
| | - Verônica Calado
- School of Chemistry, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rua Horácio Macedo 2030, Rio de Janeiro, RJ 21941-909, Brazil
| | - João Maia
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, Ohio 44106, United States
| | - Shaghayegh Khani
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, Ohio 44106, United States
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6
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Goujon F, Martzel N, Dequidt A, Latour B, Garruchet S, Devémy J, Blaak R, Munch É, Malfreyt P. Backbone oriented anisotropic coarse grains for efficient simulations of polymers. J Chem Phys 2020; 153:214901. [PMID: 33291912 DOI: 10.1063/5.0019945] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Despite the fact that anisotropic particles have been introduced to describe molecular interactions for decades, they have been poorly used for polymers because of their computing time overhead and the absence of a relevant proof of their impact in this field. We first report a method using anisotropic beads for polymers, which solves the computing time issue by considering that beads keep their principal orientation alongside the mean local backbone vector of the polymer chain, avoiding the computation of torques during the dynamics. Applying this method to a polymer bulk, we study the effect of anisotropic interactions vs isotropic ones for various properties such as density, pressure, topology of the chain network, local structure, and orientational order. We show that for different classes of potentials traditionally used in molecular simulations, those backbone oriented anisotropic beads can solve numerous issues usually encountered with isotropic interactions. We conclude that the use of backbone oriented anisotropic beads is a promising approach for the development of realistic coarse-grained potentials for polymers.
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Affiliation(s)
- Florent Goujon
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France
| | - Nicolas Martzel
- Manufacture Française des Pneumatiques Michelin, Site de Ladoux, 23 Place des Carmes Déchaux, France Cedex 9, 63040 Clermont-Ferrand, France
| | - Alain Dequidt
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France
| | - Benoit Latour
- Manufacture Française des Pneumatiques Michelin, Site de Ladoux, 23 Place des Carmes Déchaux, France Cedex 9, 63040 Clermont-Ferrand, France
| | - Sébastien Garruchet
- Manufacture Française des Pneumatiques Michelin, Site de Ladoux, 23 Place des Carmes Déchaux, France Cedex 9, 63040 Clermont-Ferrand, France
| | - Julien Devémy
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France
| | - Ronald Blaak
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France
| | - Étienne Munch
- Manufacture Française des Pneumatiques Michelin, Site de Ladoux, 23 Place des Carmes Déchaux, France Cedex 9, 63040 Clermont-Ferrand, France
| | - Patrice Malfreyt
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France
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7
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Shear-induced microstructures and dynamics processes of phospholipid cylinders in solutions. Sci Rep 2019; 9:15393. [PMID: 31659204 PMCID: PMC6817888 DOI: 10.1038/s41598-019-51933-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 10/09/2019] [Indexed: 11/08/2022] Open
Abstract
Shear-induced microstructures and their corresponding dynamic processes are investigated for phospholipid cylinders in aqueous solution by dissipative particle dynamic simulation. Various phospholipid cylinders with cross-sections, which are formed under shear-free flow, are selected to examine the effects of shear flow on their structures and dynamic processes. Shear flow induces the transition from cylinders into vesicles at weak rate and the transition into vesicle–lamella mixtures with increased shear rate and lamella structures at the strong shear rate. Then, the average radius of gyration and shape factors of the polymer chains in the dynamic processes are discussed in detail. Results show that shear flow causes the structure of the polymer chains to be elongated along the shear direction, and the configuration of the polymer chain can be rapidly transformed into an ellipsoid structure under strong shear.
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8
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Karatrantos A, Composto RJ, Winey KI, Kröger M, Clarke N. Modeling of Entangled Polymer Diffusion in Melts and Nanocomposites: A Review. Polymers (Basel) 2019; 11:E876. [PMID: 31091725 PMCID: PMC6571671 DOI: 10.3390/polym11050876] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/06/2019] [Accepted: 05/09/2019] [Indexed: 11/29/2022] Open
Abstract
This review concerns modeling studies of the fundamental problem of entangled (reptational) homopolymer diffusion in melts and nanocomposite materials in comparison to experiments. In polymer melts, the developed united atom and multibead spring models predict an exponent of the molecular weight dependence to the polymer diffusion very similar to experiments and the tube reptation model. There are rather unexplored parameters that can influence polymer diffusion such as polymer semiflexibility or polydispersity, leading to a different exponent. Models with soft potentials or slip-springs can estimate accurately the tube model predictions in polymer melts enabling us to reach larger length scales and simulate well entangled polymers. However, in polymer nanocomposites, reptational polymer diffusion is more complicated due to nanoparticle fillers size, loading, geometry and polymer-nanoparticle interactions.
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Affiliation(s)
- Argyrios Karatrantos
- Materials Research and Technology, Luxembourg Institute of Science and Technology, 5, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg.
| | - Russell J Composto
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Karen I Winey
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Martin Kröger
- Polymer Physics, Department of Materials, ETH Zurich, Leopold-Ruzicka-Weg 4, CH-8093 Zurich, Switzerland.
| | - Nigel Clarke
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK.
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9
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The role of solvent quality, inhomogeneous polymer brush composition, grafting density and number of free chains on the viscosity, friction between surfaces, and their scaling laws. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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10
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Nguyen VP, Phi PQ, Choi ST. Tribological Behavior of Grafted Nanoparticle on Polymer-Brushed Walls: A Dissipative Particle Dynamics Study. ACS APPLIED MATERIALS & INTERFACES 2019; 11:11988-11998. [PMID: 30821436 DOI: 10.1021/acsami.8b19001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Two contacting surfaces grafted with polymer brushes have potential applications due to their extraordinary lubricating behavior. However, the polymer brushes may have poor mechanical stability under high normal and shear stresses, which is a challenge for practical usage of polymer brush systems. In this study, we propose the use of grafted nanoparticles as nanobearings on polymer-brush-coated surfaces to alleviate the harsh working conditions of polymer brushes and to improve their mechanical stability. We have performed dissipative particle dynamics (DPD) simulations to investigate the tribological interaction between grafted nanoparticle and parallel walls with noncharged polymer brushes in the presence of explicit solvent. The influences of several parameters (solvent quality, brush miscibility, etc.) on the tribological behavior of the system are investigated. The grafted nanoparticle obviously acts as a nanobearing that partially replaces the sliding contact between two brushed walls with rolling contact between the grafted nanoparticle and two brushed walls and reduces the number of DPD particles withstanding high force. Although the introduction of the grafted nanoparticle into polymer-brushed walls increases the friction coefficient by 20-30%, it does not greatly decrease lubrication of the brushed walls, while still helping in stabilizing the system of polymer brushes to be used with liquids with low viscosity, such as water. The DPD simulation results and analysis performed in this study would be beneficial in designing systems with polymer-brushed surfaces and grafted nanoparticles.
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Affiliation(s)
- Vinh Phu Nguyen
- School of Mechanical Engineering , Chung-Ang University , 84 Heukseok-Ro , Dongjak-Gu, Seoul 06974 , Republic of Korea
| | - Phuoc Quang Phi
- School of Mechanical Engineering , Chung-Ang University , 84 Heukseok-Ro , Dongjak-Gu, Seoul 06974 , Republic of Korea
| | - Seung Tae Choi
- School of Mechanical Engineering , Chung-Ang University , 84 Heukseok-Ro , Dongjak-Gu, Seoul 06974 , Republic of Korea
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11
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Shan Y, Wang X, Ji Y, He L, Li S. Self-assembly of phospholipid molecules in solutions under shear flows: Microstructures and phase diagrams. J Chem Phys 2019; 149:244901. [PMID: 30599738 DOI: 10.1063/1.5056229] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Shear-induced microstructures and their phase diagrams were investigated for phospholipid molecules in aqueous solution by dissipative particle dynamic simulation. Self-assembled microstructures, including spherical and cylindrical micelles, spherical vesicles, lamellae, undulated lamellae, perforated lamellae, and continuous networks, were observed under various shear flows and phospholipid concentrations, where the spatial inhomogeneity and symmetry were analysed. A series of phase diagrams were constructed based on the chain lengths under various phospholipid concentrations. The phase distributions showed that the structures with spherical symmetry could be shear-induced to structures with cylindrical symmetry in the dilute solutions. In the semi-concentrated solutions, the lamellae were located in most spaces under zero shear flows, which could be shear-induced into undulated lamellae and then into cylindrical micelles. For the concentrated solutions, the strong shear flows oriented the directions of multilayer lamellae and phase transitions appeared between several cylindrical network structures. These observations on shear-induced microstructures and their distributions revealed a promising approach that could be used to design bio-microstructures based on phospholipid molecules under shear flows.
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Affiliation(s)
- Yue Shan
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Xianghong Wang
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Yongyun Ji
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Linli He
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Shiben Li
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
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12
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Hagita K, Murashima T, Iwaoka N. Thinning Approximation for Calculating Two-Dimensional Scattering Patterns in Dissipative Particle Dynamics Simulations under Shear Flow. Polymers (Basel) 2018; 10:E1224. [PMID: 30961149 PMCID: PMC6290630 DOI: 10.3390/polym10111224] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 10/26/2018] [Accepted: 11/01/2018] [Indexed: 11/16/2022] Open
Abstract
Modifications to improve thinning approximation (TA) were considered in order to calculate two-dimensional scattering patterns (2DSPs) for dissipative particle dynamics (DPD) simulations of polymer melts under a shear flow. We proposed multipoint TA and adaptive TA because the bond lengths in DPD chains vary widely when compared to those in Kremer⁻Grest (KG) chains, and the effectiveness of these two types of TA for the two major DPD parameter sets were investigated. In this paper, we report our findings on the original DPD model with soft bonds and that with rigid bonds. Based on the behavior of the 2DSPs and the distribution of orientations of the bond vectors, two spot patterns originating from the oriented chain correlations were observed when distinct distributions of the highly oriented bond vectors in the shear direction were obtained. For multipoint TA, we concluded that at least two additional midpoints ( n mid ≥ 2 ) are required to clearly observe the two spot patterns. For adaptive TA, a dividing distance of l ATA ≤ 0.4 is sufficient for clear observation, which is consistent with the requirement of n mid ≥ 2 for multipoint TA.
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Affiliation(s)
- Katsumi Hagita
- Department of Applied Physics, National Defense Academy, Yokosuka 239-8686, Japan.
| | | | - Nobuyuki Iwaoka
- Department of Creative Engineering, Tsuruoka College, National Institute of Technology, Yamagata 997-8511, Japan.
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13
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Iwaoka N, Hagita K, Takano H. Multipoint segmental repulsive potential for entangled polymer simulations with dissipative particle dynamics. J Chem Phys 2018; 149:114901. [PMID: 30243288 DOI: 10.1063/1.5046755] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A model is developed for simulating entangled polymers by dissipative particle dynamics (DPD) using the segmental repulsive potential (SRP). In contrast to previous SRP models that define a single-point interaction on each bond, the proposed SRP model applies a dynamically adjustable multipoint on the bond. Previous SRP models could not reproduce the equilibrium properties of Groot and Warren's original DPD model [R. D. Groot and P. B. Warren, J. Chem. Phys. 107, 4423 (1997)] because the introduction of a single SRP induces a large excluded volume, whereas, the proposed multipoint SRP (MP-SRP) introduces a cylindrical effective excluded bond volume. We demonstrate that our MP-SRP model exhibits equilibrium properties similar to those of the original DPD polymers. The MP-SRP model parameters are determined by monitoring the number of topology violations, thermodynamic properties, and the polymer internal structure. We examine two typical DPD polymers with different bond-length distributions; one of them was used in the modified SRP model by Sirk et al. [J. Chem. Phys. 136, 134903 (2012)], whereas the other was used in the original DPD model. We demonstrate that for both polymers, the proposed MP-SRP model captures the entangled behaviors of a polymer melt naturally, by calculating the slowest relaxation time of a chain in the melt and the shear relaxation modulus. The results indicate that the proposed MP-SRP model can be applied to a variety of DPD polymers.
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Affiliation(s)
- Nobuyuki Iwaoka
- Department of Creative Engineering, Tsuruoka College, National Institute of Technology, 104 Sawada, Inooka, Tsuruoka, Yamagata 997-8511, Japan
| | - Katsumi Hagita
- Department of Applied Physics, National Defense Academy, 1-10-20, Hashirimizu, Yokosuka 239-8686, Japan
| | - Hiroshi Takano
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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14
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Bottlebrush block polymers in solutions: Self-assembled microstructures and interactions with lipid membranes. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.02.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Qiang X, Wang X, Ji Y, Li S, He L. Liquid-crystal self-assembly of lipid membranes on solutions: A dissipative particle dynamic simulation study. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.03.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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16
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Gama Goicochea A, López-Esparza R, Balderas Altamirano M, Rivera-Paz E, Waldo-Mendoza M, Pérez E. Friction coefficient and viscosity of polymer brushes with and without free polymers as slip agents. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.03.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Chennevière A, Cousin F, Boué F, Drockenmuller E, Shull KR, Léger L, Restagno F. Direct Molecular Evidence of the Origin of Slip of Polymer Melts on Grafted Brushes. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02505] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexis Chennevière
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
| | - Fabrice Cousin
- Laboratoire
Léon Brillouin CEA, CNRS, CEA Saclay, 91191 Gif-sur-Yvette, France
| | - François Boué
- Laboratoire
Léon Brillouin CEA, CNRS, CEA Saclay, 91191 Gif-sur-Yvette, France
| | - Eric Drockenmuller
- Ingénierie
des Matériaux Polymères, CNRS, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France
| | - Kenneth R. Shull
- Department
of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Liliane Léger
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
| | - Frédéric Restagno
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
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18
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Sweeney J, Webber GB, Atkin R. Poly(ethylene oxide) Mushrooms Adsorbed at Silica-Ionic Liquid Interfaces Reduce Friction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1947-1954. [PMID: 26844589 DOI: 10.1021/acs.langmuir.5b04503] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The adsorbed layer conformation and lubricity of 35, 100, and 300 kDa PEO adsorbed to ionic liquid (IL)-silica interfaces from 0.01 wt % solutions have been investigated using colloid probe atomic force microscopy. The ILs used were propylammonium nitrate (PAN) and 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]), which are protic and aprotic ILs, respectively. Normal force curves reveal steric interactions consistent with adsorbed polymer layers which are best fit using the mushroom model. Friction measurements show that the adsorbed polymer layer markedly reduces friction compared to surfaces sliding in the pure ILs and that lubricity increases with polymer length. When polymer is adsorbed to the sliding surfaces, friction is controlled by the creation and disruption of intermolecular interactions between entangled chains and the dragging of polymer chains through the interpenetration region. These experiments show that added polymer can reduce friction while maintaining the useful properties of ILs as lubricants.
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Affiliation(s)
- James Sweeney
- Priority Research Centre for Advanced Fluids and Interfaces, Newcastle Institute for Energy and Resources, The University of Newcastle , Callaghan, NSW 2308, Australia
| | - Grant B Webber
- Priority Research Centre for Advanced Fluids and Interfaces, Newcastle Institute for Energy and Resources, The University of Newcastle , Callaghan, NSW 2308, Australia
| | - Rob Atkin
- Priority Research Centre for Advanced Fluids and Interfaces, Newcastle Institute for Energy and Resources, The University of Newcastle , Callaghan, NSW 2308, Australia
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19
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Zheng F, Goujon F, Mendonça ACF, Malfreyt P, Tildesley DJ. Structure and rheology of star polymers in confined geometries: a mesoscopic simulation study. SOFT MATTER 2015; 11:8590-8598. [PMID: 26435466 DOI: 10.1039/c5sm01799h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Mesoscopic simulations of star polymer melts adsorbed onto solid surfaces are performed using the dissipative particle dynamics (DPD) method. A set of parameters is developed to study the low functionality star polymers under shear. The use of a new bond-angle potential between the arms of the star creates more rigid chains and discriminates between different functionalities at equilibrium, but still allows the polymers to deform appropriately under shear. The rheology of the polymer melts is studied by calculating the kinetic friction and viscosity and there is good agreement with experimental properties of these systems. The study is completed with predictive simulations of star polymer solutions in an athermal solvent.
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Affiliation(s)
- Feiwo Zheng
- ICCF, UMR CNRS 6296, Université Blaise Pascal, 63177 Aubière Cedex, France.
| | - Florent Goujon
- ICCF, UMR CNRS 6296, Université Blaise Pascal, 63177 Aubière Cedex, France.
| | | | - Patrice Malfreyt
- ICCF, UMR CNRS 6296, Université Blaise Pascal, 63177 Aubière Cedex, France.
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20
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Maurel G, Goujon F, Schnell B, Malfreyt P. Prediction of structural and thermomechanical properties of polymers from multiscale simulations. RSC Adv 2015. [DOI: 10.1039/c4ra16417b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
We report mesoscale simulations of polymer melts and crosslinked polymer networks by using realistic coarse-grained (CG) models that are developed from atomistic simulations of polymer melts.
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Affiliation(s)
- Gaëtan Maurel
- Clermont Université
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- ICCF
- CNRS
| | - Florent Goujon
- Clermont Université
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- ICCF
- CNRS
| | - Benoit Schnell
- Manufacture Française de Pneumatiques MICHELIN
- Centre de Ladoux
- 63040 Clermont-Ferrand, France
| | - Patrice Malfreyt
- Clermont Université
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- ICCF
- CNRS
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21
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Terrón-Mejía KA, López-Rendón R, Gama Goicochea A. Mesoscopic modeling of structural and thermodynamic properties of fluids confined by rough surfaces. Phys Chem Chem Phys 2015; 17:26403-16. [DOI: 10.1039/c5cp03823e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Simulations show that the ordering of particles confined by rough surfaces induces a structural phase transition while the interfacial tension is insensitive to it.
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Affiliation(s)
- Ketzasmin A. Terrón-Mejía
- Laboratorio de Bioingeniería Molecular a Multiescala
- Facultad de Ciencias
- Universidad Autónoma del Estado de México
- Toluca, Mexico
| | - Roberto López-Rendón
- Laboratorio de Bioingeniería Molecular a Multiescala
- Facultad de Ciencias
- Universidad Autónoma del Estado de México
- Toluca, Mexico
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22
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de Beer S, Müser MH. Friction in (Im-) Miscible Polymer Brush Systems and the Role of Transverse Polymer Tilting. Macromolecules 2014. [DOI: 10.1021/ma501718b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Sissi de Beer
- Jülich
Supercomputing Centre, Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
- Materials
Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente,
P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Martin H. Müser
- Jülich
Supercomputing Centre, Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
- Department
of Materials Science and Engineering, Universität des Saarlandes, 66123 Saarbrücken, Germany
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23
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Kobryn AE, Nikolić D, Lyubimova O, Gusarov S, Kovalenko A. Dissipative Particle Dynamics with an Effective Pair Potential from Integral Equation Theory of Molecular Liquids. J Phys Chem B 2014; 118:12034-49. [DOI: 10.1021/jp503981p] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Alexander E. Kobryn
- National
Institute for Nanotechnology, National Research Council of Canada, 11421
Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
| | - Dragan Nikolić
- National
Institute for Nanotechnology, National Research Council of Canada, 11421
Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
- Department
of Mechanical Engineering, University of Alberta, Edmonton, Alberta T6G 2G8, Canada
| | - Olga Lyubimova
- National
Institute for Nanotechnology, National Research Council of Canada, 11421
Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
- Department
of Mechanical Engineering, University of Alberta, Edmonton, Alberta T6G 2G8, Canada
| | - Sergey Gusarov
- National
Institute for Nanotechnology, National Research Council of Canada, 11421
Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
| | - Andriy Kovalenko
- National
Institute for Nanotechnology, National Research Council of Canada, 11421
Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
- Department
of Mechanical Engineering, University of Alberta, Edmonton, Alberta T6G 2G8, Canada
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24
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Goren T, Spencer ND, Crockett R. Impact of chain morphology on the lubricity of surface-grafted polysaccharides. RSC Adv 2014. [DOI: 10.1039/c4ra01087f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The impact of brush-like structure and disorder on the lubricating ability of dextran chains at low and high loads has been investigated by means of AFM.
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Affiliation(s)
- T. Goren
- Laboratory for Surface Science and Technology
- Department of Materials
- CH-8093 Zurich, Switzerland
| | - N. D. Spencer
- Laboratory for Surface Science and Technology
- Department of Materials
- CH-8093 Zurich, Switzerland
| | - R. Crockett
- Swiss Federal Institute for Materials Science and Technology
- CH-8600 Duebendorf, Switzerland
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25
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Elliott IG, Kuhl TL, Faller R. Compression of High Grafting Density Opposing Polymer Brushes Using Molecular Dynamics Simulations in Explicit Solvent. J Phys Chem B 2013; 117:4134-41. [DOI: 10.1021/jp3118117] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ian G. Elliott
- Department of Chemical Engineering & Materials Science, UC Davis, One Shields Avenue, Davis, California 95616, United States
| | - Tonya L. Kuhl
- Department of Chemical Engineering & Materials Science, UC Davis, One Shields Avenue, Davis, California 95616, United States
| | - Roland Faller
- Department of Chemical Engineering & Materials Science, UC Davis, One Shields Avenue, Davis, California 95616, United States
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26
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He L, Chen Z, Zhang R, Zhang L, Jiang Z. Self-assembly of cyclic rod-coil diblock copolymers. J Chem Phys 2013; 138:094907. [DOI: 10.1063/1.4793406] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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27
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Mendonça ACF, Pádua AAH, Malfreyt P. Nonequilibrium Molecular Simulations of New Ionic Lubricants at Metallic Surfaces: Prediction of the Friction. J Chem Theory Comput 2013; 9:1600-10. [DOI: 10.1021/ct3008827] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Patrice Malfreyt
- Institut de Chimie de Clermont-Ferrand, UMR 6296, Université Blaise Pascal & CNRS, 63171 Aubière, France
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28
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Nikolić D, Moffat KA, Farrugia VM, Kobryn AE, Gusarov S, Wosnick JH, Kovalenko A. Multi-scale modeling and synthesis of polyester ionomers. Phys Chem Chem Phys 2013; 15:6128-38. [DOI: 10.1039/c3cp44285c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Maurel G, Schnell B, Goujon F, Couty M, Malfreyt P. Multiscale Modeling Approach toward the Prediction of Viscoelastic Properties of Polymers. J Chem Theory Comput 2012; 8:4570-9. [DOI: 10.1021/ct300582y] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- G. Maurel
- Manufacture Française des Pneumatiques MICHELIN, Centre de Ladoux, 23 place
des Carmes, 63000 Clermont-Ferrand, France
- Institut de Chimie de Clermont-Ferrand,
ICCF, UMR CNRS 6296, Université Blaise Pascal, 63177 Aubière Cedex, France
| | - B. Schnell
- Manufacture Française des Pneumatiques MICHELIN, Centre de Ladoux, 23 place
des Carmes, 63000 Clermont-Ferrand, France
| | - F. Goujon
- Institut de Chimie de Clermont-Ferrand,
ICCF, UMR CNRS 6296, Université Blaise Pascal, 63177 Aubière Cedex, France
| | - M. Couty
- Manufacture Française des Pneumatiques MICHELIN, Centre de Ladoux, 23 place
des Carmes, 63000 Clermont-Ferrand, France
| | - P. Malfreyt
- Institut de Chimie de Clermont-Ferrand,
ICCF, UMR CNRS 6296, Université Blaise Pascal, 63177 Aubière Cedex, France
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30
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Elliott IG, Kuhl TL, Faller R. A Molecular Dynamics Technique to Extract Forces in Soft Matter Systems Under Compression With Constant Solvent Chemical Potential. J Chem Theory Comput 2012; 8:1072-7. [DOI: 10.1021/ct2005984] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ian G. Elliott
- Chemical Engineering and Material Science, University
of California, 3112 Bainer Hall, One Shields Avenue, Davis, California,
United States
| | - Tonya L. Kuhl
- Chemical Engineering and Material Science, University
of California, 3112 Bainer Hall, One Shields Avenue, Davis, California,
United States
| | - Roland Faller
- Chemical Engineering and Material Science, University
of California, 3112 Bainer Hall, One Shields Avenue, Davis, California,
United States
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31
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Spirin L, Galuschko A, Kreer T. Response to Shear Inversion of Polymer Brushes with Embedded Colloids. Macromolecules 2011. [DOI: 10.1021/ma2014029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- L. Spirin
- Graduate School of Excellence “Material Science in Mainz”, Mainz, Germany
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
| | - A. Galuschko
- Institut Charles Sadron, 23 rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France
- Institut für Theoretische Physik, Georg-August Universität, 37077 Göttingen, Germany
| | - T. Kreer
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
- Institut Charles Sadron, 23 rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France
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32
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Li N, Zuo C, Cao Q. Nanopores with Solvent-Sensitive Polymer Brushes: A Dissipative Particle Dynamics Simulation. J MACROMOL SCI B 2011. [DOI: 10.1080/00222348.2011.596776] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Nan Li
- a College of Mechanical Science and Engineering, Jilin University , Changchun , P.R. China
| | - Chuncheng Zuo
- a College of Mechanical Science and Engineering, Jilin University , Changchun , P.R. China
| | - Qianqian Cao
- a College of Mechanical Science and Engineering, Jilin University , Changchun , P.R. China
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33
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Rosenberg KJ, Goren T, Crockett R, Spencer ND. Load-induced transitions in the lubricity of adsorbed poly(L-lysine)-g-dextran as a function of polysaccharide chain density. ACS APPLIED MATERIALS & INTERFACES 2011; 3:3020-3025. [PMID: 21749097 DOI: 10.1021/am200521m] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Chain-density gradients of poly(l-lysine)-graft-dextran (PLL-g-dex), a synthetic comblike copolymer with a poly(l-lysine) backbone grafted with dextran side chains, were fabricated on an oxidized silicon substrate. The influence of the changing dextran chain density along the gradient on the local coefficient of friction was investigated via colloidal-probe lateral force microscopy. Both in composition and structure, PLL-g-dex shares many similarities with bottlebrush biomolecules present in natural lubricating systems, while having the advantage of being well-characterized in terms of both architecture and adsorption behavior on negatively charged oxide surfaces. The results indicate that the transition of the dextran chain density from the mushroom into the brush regime coincides with a sharp reduction in friction at low loads. Above a critical load, the friction increases by more than an order of magnitude, likely signaling a pressure-induced change in the brush conformation at the contact area and a corresponding change in the mechanism of sliding. The onset of this higher-friction regime is moved to higher loads as the chain density of the film is increased. While in the low-load (and low-friction) regime, increased chain density leads to lower friction, in the high-load (high-friction) regime, increased chain density was found to lead to higher friction.
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Affiliation(s)
- Kenneth J Rosenberg
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich, Switzerland
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34
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Yamanoi M, Pozo O, Maia JM. Linear and non-linear dynamics of entangled linear polymer melts by modified tunable coarse-grained level Dissipative Particle Dynamics. J Chem Phys 2011; 135:044904. [DOI: 10.1063/1.3615504] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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35
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He L, Zhang L, Ye Y, Liang H. Solvent-induced self-assembly of polymer-tethered nanorods. J Phys Chem B 2010; 114:7189-200. [PMID: 20455523 DOI: 10.1021/jp101129p] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Self-assembly behaviors of polymer-tethered nanorods in the selective solvent are systematically investigated via a dissipative particle dynamics (DPD) simulation method. Three types of polymer-tethered nanorods are considered: one end tethered, both ends tethered, and middle tethered. The solvent-induced diverse morphologies and morphological transitions depend on the topology, rod/tether length ratio, solvent selectivity, and mixed solvent content. In the pure rod-selective solvent (solvent I) or the pure tether-selective solvent (solvent II), the ordered micellar structures include: cylinders, hexagonal cylinders, bilayer lamellae, lamellae/cylinder mixed phases, inverted hollow cylinders, and nematic bundles. These micelles are formed by the competition among the stretching of tethers, liquid crystalline of rods, interfacial energy, and solvent selectivity. In the I/II mixed solvent, with varying mixed solvent content in sequence (i.e., changing the solvent quality for the blocks), the reversible morphological transitions and fantastic intermediate phases (e.g., liquid crystalline phase) are observed, which correspond directly to the case of that induced by varying the rod/tether length ratio in the pure solvent. It is concluded that improving the selective solvent content is equivalent to increasing the soluble block ratio. The present study reveals that the morphology and morphological transition of polymer-tethered nanorods could be significantly manipulated through topology, block length, and solvent, especially the selectivity.
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Affiliation(s)
- Linli He
- Department of Physics, Zhejiang University, Hangzhou 310027, P. R. China
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36
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Ghoufi A, Malfreyt P. Calculation of the surface tension from multibody dissipative particle dynamics and Monte Carlo methods. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 82:016706. [PMID: 20866760 DOI: 10.1103/physreve.82.016706] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 06/14/2010] [Indexed: 05/29/2023]
Abstract
We report the calculation of the coexisting densities and surface tensions of the liquid-vapor equilibrium using the multibody dissipative particle dynamics and Monte Carlo (MMC) methods. We focus on the calculation of the surface tension by using the thermodynamic and mechanical routes. It is the first time that the test-area method is applied on the many-body conservative potential. We discuss the mechanical equilibrium of these two-phase systems by analyzing the profiles of the normal and tangential components of the pressure tensor using the Irving-Kirkwood and Kirkwood-Buff approaches. The profile of the configurational temperature is shown to establish the thermal equilibrium of these two-phase simulations carried out with large time steps. We complete this study to show the impact of the range of the many-body repulsive term of the conservative force on the surface tension. We conclude that the MMC method is an efficient sampling scheme to compute the interfacial properties of liquid-vapor interfaces using the multibody soft potential.
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Affiliation(s)
- A Ghoufi
- Institut de Physique de Rennes, UMR 6251 CNRS, Université Rennes 1, Rennes, France
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37
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Ibergay C, Malfreyt P, Tildesley DJ. Mesoscale Modeling of Polyelectrolyte Brushes with Salt. J Phys Chem B 2010; 114:7274-85. [DOI: 10.1021/jp9115832] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cyrille Ibergay
- Laboratoire de Thermodynamique et Interactions Moléculaires, Clermont Université, Université Blaise Pascal, CNRS, UMR 6272, LTIM, F-63177 Aubiere, BP 10448, F-63000 Clermont-Ferrand, and Unilever Research, Port Sunlight, Bebington, Wirral CH63 3JW, U.K
| | - Patrice Malfreyt
- Laboratoire de Thermodynamique et Interactions Moléculaires, Clermont Université, Université Blaise Pascal, CNRS, UMR 6272, LTIM, F-63177 Aubiere, BP 10448, F-63000 Clermont-Ferrand, and Unilever Research, Port Sunlight, Bebington, Wirral CH63 3JW, U.K
| | - Dominic J. Tildesley
- Laboratoire de Thermodynamique et Interactions Moléculaires, Clermont Université, Université Blaise Pascal, CNRS, UMR 6272, LTIM, F-63177 Aubiere, BP 10448, F-63000 Clermont-Ferrand, and Unilever Research, Port Sunlight, Bebington, Wirral CH63 3JW, U.K
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38
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Eslami H, Müller-Plathe F. Viscosity of Nanoconfined Polyamide-6,6 Oligomers: Atomistic Reverse Nonequilibrium Molecular Dynamics Simulation. J Phys Chem B 2009; 114:387-95. [DOI: 10.1021/jp908659w] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hossein Eslami
- Eduard-Zintl Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287, Germany, and Department of Chemistry, College of Sciences, Persian Gulf University, Boushehr 75168, Iran
| | - Florian Müller-Plathe
- Eduard-Zintl Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287, Germany, and Department of Chemistry, College of Sciences, Persian Gulf University, Boushehr 75168, Iran
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