1
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Qi J, Shao Z, Sun Y, Wang Z, Chen Q, Wang J, Huang D, Liu J, Shen J, Cao D, Zeng X, Chen J. Remarkable Toughening of Plastic with Monodispersed Nano-CaCO 3: From Theoretical Predictions to Experimental Validation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 38902198 DOI: 10.1021/acs.langmuir.4c01435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
The structure-property relationship of poly(vinyl chloride) (PVC)/CaCO3 nanocomposites is investigated by all-atom molecular dynamics (MD) simulations. MD simulation results indicate that the dispersity of nanofillers, interfacial bonding, and chain mobility are imperative factors to improve the mechanical performance of nanocomposites, especially toughness. The tensile behavior and dissipated work of the PVC/CaCO3 model demonstrate that 12 wt % CaCO3 modified with oleate anion and dodecylbenzenesulfonate can impart high toughness to PVC due to its good dispersion, favorable interface interaction, and weak migration of PVC chains. Under the guidance of MD simulation, we experimentally prepared a transparent PVC/CaCO3 nanocomposite with good mechanical properties by in situ polymerization of monodispersed CaCO3 in vinyl chloride monomers. Interestingly, experimental tests indicate that the optimum toughness of a nanocomposite (a 368% increase in the elongation at break and 204% improvement of the impact strength) can be indeed realized by adding 12 wt % CaCO3 modified with oleic acid and dodecylbenzenesulfonic acid, which is remarkably consistent with the MD simulation prediction. In short, this work provides a proof-of-concept of using MD simulation to guide the experimental synthesis of PVC/CaCO3 nanocomposites, which can be considered as an example to develop other functional nanocomposites.
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Affiliation(s)
- Jiajia Qi
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhengxuan Shao
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yujun Sun
- Xinjiang Tianye (Group) Co., Ltd, Xinjiang 832099, China
| | - Zhirong Wang
- Xinjiang Tianye (Group) Co., Ltd, Xinjiang 832099, China
| | - Qionghai Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jiexin Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Dong Huang
- Xinjiang Tianye (Group) Co., Ltd, Xinjiang 832099, China
| | - Jun Liu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
- Department of Polymer Science and Engineering, Jiaxing University, Jiaxing 314001, China
| | - Jianxiang Shen
- Department of Polymer Science and Engineering, Jiaxing University, Jiaxing 314001, China
| | - Dapeng Cao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaofei Zeng
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jianfeng Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China
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2
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Bačová P, Gkolfi E, Harmandaris V. Soft Character of Star-Like Polymer Melts: From Linear-Like Chains to Impenetrable Nanoparticles. NANO LETTERS 2023; 23:1608-1614. [PMID: 36621897 PMCID: PMC9951242 DOI: 10.1021/acs.nanolett.2c04213] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/29/2022] [Indexed: 06/17/2023]
Abstract
The importance of microscopic details in the description of the behavior of polymeric nanostructured systems, such as hairy nanoparticles, has been lately discussed via experimental and theoretical approaches. Here we focus on star polymers, which represent well-defined soft nano-objects. By means of atomistic molecular dynamics simulations, we provide a quantitative study about the effect of chemistry on the penetrability of star polymers in a melt, which cannot be considered by generic coarse-grained models. The "effective softness" estimated for two dissimilar polymers is confronted with available literature data. A consistent picture about the star penetrability can be drawn when the star internal packing is taken into consideration besides the number and the length of the star arms. These findings, together with the recently introduced two-layer model, represent a step forward in providing a fundamental understanding of the soft character of stars and guiding their design toward advanced applications, such as in all-polymer nanocomposites.
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Affiliation(s)
- Petra Bačová
- Departamento
de Ciencia de los Materiales e Ingeniería Metalúrgica
y Química Inorgánica, Facultad de Ciencias, IMEYMAT, Campus Universitario Río San Pedro s/n., 11510Puerto Real,
Cádiz, Spain
- Computation-based
Science and Technology Research Center, The Cyprus Institute, 20 Constantinou Kavafi Str., 2121Nicosia, Cyprus
- Institute
of Applied and Computational Mathematics, Foundation for Research and Technology Hellas, GR-70013Heraklion, Crete, Greece
| | - Eirini Gkolfi
- Computation-based
Science and Technology Research Center, The Cyprus Institute, 20 Constantinou Kavafi Str., 2121Nicosia, Cyprus
- Institute
of Applied and Computational Mathematics, Foundation for Research and Technology Hellas, GR-70013Heraklion, Crete, Greece
- Department
of Mathematics and Applied Mathematics, University of Crete, GR-71409Heraklion, Crete, Greece
| | - Vagelis Harmandaris
- Computation-based
Science and Technology Research Center, The Cyprus Institute, 20 Constantinou Kavafi Str., 2121Nicosia, Cyprus
- Institute
of Applied and Computational Mathematics, Foundation for Research and Technology Hellas, GR-70013Heraklion, Crete, Greece
- Department
of Mathematics and Applied Mathematics, University of Crete, GR-71409Heraklion, Crete, Greece
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3
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Wang S, Luo Z, Liang J, Hu J, Jiang N, He J, Li Q. Polymer Nanocomposite Dielectrics: Understanding the Matrix/Particle Interface. ACS NANO 2022; 16:13612-13656. [PMID: 36107156 DOI: 10.1021/acsnano.2c07404] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Polymer nanocomposite dielectrics possess exceptional electric properties that are absent in the pristine dielectric polymers. The matrix/particle interface in polymer nanocomposite dielectrics is suggested to play decisive roles on the bulk material performance. Herein, we present a critical overview of recent research advances and important insights in understanding the matrix/particle interfacial characteristics in polymer nanocomposite dielectrics. The primary experimental strategies and state-of-the-art characterization techniques for resolving the local property-structure correlation of the matrix/particle interface are dissected in depth, with a focus on the characterization capabilities of each strategy or technique that other approaches cannot compete with. Limitations to each of the experimental strategy are evaluated as well. In the last section of this Review, we summarize and compare the three experimental strategies from multiple aspects and point out their advantages and disadvantages, critical issues, and possible experimental schemes to be established. Finally, the authors' personal viewpoints regarding the challenges of the existing experimental strategies are presented, and potential directions for the interface study are proposed for future research.
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Affiliation(s)
- Shaojie Wang
- State Key Laboratory of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Zhen Luo
- State Key Laboratory of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Jiajie Liang
- State Key Laboratory of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Jun Hu
- State Key Laboratory of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Naisheng Jiang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jinliang He
- State Key Laboratory of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
| | - Qi Li
- State Key Laboratory of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
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4
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Lteif S, Akkaoui K, Abou Shaheen S, Chaaban M, Weigand S, Schlenoff JB. Gummy Nanoparticles with Glassy Shells in Electrostatic Nanocomposites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9611-9620. [PMID: 35877784 DOI: 10.1021/acs.langmuir.2c01019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nanocomposites with unusual and superior properties often contain well-dispersed nanoparticles. Polydimethylsiloxane, PDMS, offers a fluidlike or rubbery (when cross-linked) response, which complements the high-modulus nature of inorganic nanofillers. Systems using PDMS as the nanoparticulate, rather than the continuous, phase are rare because it is difficult to make PDMS nanoparticles. Aqueous dispersions of hydrophobic polymer nanoparticles must survive the considerable contrast in hydrophobicity between water and the polymer component. This challenge is often met with a shell of hydrophilic polymer or by adding surfactant. In the present work, two critical advances for making and using aqueous colloidal dispersions of PDMS are reported. First, PDMS nanoparticles with charged amino end groups were prepared by flash nanoprecipitation in aqueous solutions. Adding a negative polyelectrolyte, poly(styrene sulfonate), PSS, endowed the nanoparticles with a glassy shell, stabilizing them against aggregation. Second, when compressed into a nanocomposite, the small amount of PSS leads to a large increase in bulk modulus. X-ray scattering studies revealed the hierarchical nanostructuring within the composite, with a 4 nm PDMS micelle as the smallest unit. This class of nanoparticle and nanocomposite presents a new paradigm for stabilizing liquidlike building blocks for nanomaterials.
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Affiliation(s)
- Sandrine Lteif
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States
| | - Khalil Akkaoui
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States
| | - Samir Abou Shaheen
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States
| | - Maya Chaaban
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States
| | - Steven Weigand
- DND-CAT Synchrotron Research Center, Northwestern University, APS/ANL 432-A005, 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
| | - Joseph B Schlenoff
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States
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5
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Zhu Y, Giuntoli A, Zhang W, Lin Z, Keten S, Starr FW, Douglas JF. The Effect of Nanoparticle Softness on the Interfacial Dynamics of a Model Polymer Nanocomposite. J Chem Phys 2022; 157:094901. [DOI: 10.1063/5.0101551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The introduction of soft organic nanoparticles (NPs) into polymer melts has recently expanded the material design space for polymer nanocomposites, compared to traditional nanocomposites that utilize rigid NPs, such as silica, metallic and other inorganic NPs. Despite advances in the fabrication and characterization of this new class of materials, the effect of NP stiffness on the polymer structure and dynamics has not been systematically investigated. Here, we use molecular dynamics to investigate the segmental dynamics of the polymer interfacial region of isolated NPs of variable stiffness in a polymer matrix. When the polymer-NP interactions are stronger than the polymer-polymer interactions, we find that the slowing of segmental dynamics in the interfacial region is more pronounced for stiff NPs. In contrast, when the polymer-NP interaction strength is smaller than the matrix interaction, the NP stiffness has relatively little impact on the changes in the polymer interfacial dynamics. We also find that the segmental relaxation time t a of segments in the NP interfacial region changes from values lower than to higher than the bulk material when the polymer-NP interaction strength is increased beyond a 'critical' strength, reminiscent of a binding-unbinding transition. Both the NP stiffness and the polymer-surface interaction strength can thus greatly influence the relative segmental of the interfacial mobility in comparison to the bulk material.
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Affiliation(s)
- Yuwen Zhu
- Shanghai Jiao Tong University State Key Laboratory of Mechanical System and Vibration, China
| | - Andrea Giuntoli
- Zernike Institute for Advanced Materials, University of Groningen Zernike Institute for Advanced Materials, Netherlands
| | - Wengang Zhang
- Materials Science and Engineering Division, NIST, United States of America
| | | | - Sinan Keten
- Civil and Environmental Engineering, Mechanical Engineering, Northwestern University, United States of America
| | - Francis W. Starr
- Physics Department, Wesleyan University, United States of America
| | - Jack F. Douglas
- Materials Science and Engineering Division, National Institute of Standards and Technology, United States of America
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6
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Rheological properties of crosslinked unentangled and entangled Poly(methyl acrylate) nanocomposite networks. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Senses E, Kitchens CL, Faraone A. Viscosity reduction in polymer nanocomposites: Insights from dynamic neutron and X‐ray scattering. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20210320] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Erkan Senses
- Department of Chemical and Biological Engineering Koc University Istanbul Turkey
| | - Christopher L. Kitchens
- Department of Chemical and Biomolecular Engineering Clemson University Clemson South Carolina USA
| | - Antonio Faraone
- Center for Neutron Research National Institute of Standards and Technology Gaithersburg Maryland USA
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8
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Maiz J, Verde-Sesto E, Asenjo-Sanz I, Mangin-Thro L, Frick B, Pomposo JA, Arbe A, Colmenero J. Disentangling Component Dynamics in an All-Polymer Nanocomposite Based on Single-Chain Nanoparticles by Quasielastic Neutron Scattering. Macromolecules 2022; 55:2320-2332. [PMID: 35355834 PMCID: PMC8945772 DOI: 10.1021/acs.macromol.1c02382] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 02/11/2022] [Indexed: 11/30/2022]
Abstract
![]()
We
have investigated an all-polymer nanocomposite (NC) consisting
of single-chain nanoparticles (SCNPs) immersed in a matrix of linear
chains of their precursors (25/75% composition in weight). The SCNPs
were previously synthesized via “click” chemistry, which
induces intramolecular cross-links in the individual macromolecules
accompanied by a slight shift (5–8 K) of the glass transition
temperature toward higher values and a broadening of the dynamic response
with respect to the raw precursor material. The selective investigation
of the dynamics of the NC components has been possible by using properly
isotopically labeled materials and applying quasielastic neutron scattering
techniques. Results have been analyzed in the momentum transfer range
where the coherent scattering contribution is minimal, as determined
by complementary neutron diffraction experiments with polarization
analysis. We observe the development of dynamic heterogeneity in the
intermediate scattering function of the NC components, which grows
with increasing time. Local motions in the precursor matrix of the
NC are accelerated with respect to the reference bulk behavior, while
the displacements of SCNPs’ hydrogens show enhanced deviations
from Gaussian and exponential behavior compared with the pure melt
of SCNPs. The resulting averaged behavior in the NC coincides with
that of the pure precursor, in accordance with the macroscopic observations
by differential scanning calorimetry (DSC) experiments.
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Affiliation(s)
- Jon Maiz
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
- IKERBASQUE-Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
| | - Ester Verde-Sesto
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
| | - Isabel Asenjo-Sanz
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
| | - Lucile Mangin-Thro
- Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - Bernhard Frick
- Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - José A. Pomposo
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
- IKERBASQUE-Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Universidad del País Vasco-Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia-San Sebastián, Spain
| | - Arantxa Arbe
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
| | - Juan Colmenero
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Universidad del País Vasco-Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia-San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizábal 4, 20018 Donostia-San Sebastián, Spain
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9
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Hou G, Li S, Liu J, Weng Y, Zhang L. Designing high performance polymer nanocomposites by incorporating robustness-controlled polymeric nanoparticles: insights from molecular dynamics. Phys Chem Chem Phys 2022; 24:2813-2825. [PMID: 35043809 DOI: 10.1039/d1cp04254h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Introducing polymeric nanoparticles into polymer matrices is an interesting topic, and the robustness of the polymeric nanoparticles is crucial for the properties of the polymer nanocomposites (PNCs). In this study, by incorporating star-shaped polymeric nanoparticles (SSPNs) into the polymer, the effect of the sphericity (η) and arm length (L) of the SSPNs on the mechanical properties of PNCs is systematically investigated, using a coarse-grained molecular dynamics simulation. In addition, the linear and spherical nanoparticles (NPs) are compared with SSPNs by fixing the approximate diameter and mass fraction of the NPs. The radial distribution function, the second virial coefficient, mean-squared displacement, bond autocorrelation function, and primitive path analysis are employed to systematically characterize the structure and dynamics of these new PNCs. It is found that the dispersion of the NPs is enhanced with the increase of η, and the entanglement density reaches maximum, which both contribute to the greatest mechanical reinforcing effect. More significantly, it is found that the classical Payne effect, namely the storage as a function of the strain amplitude, decreases remarkably, and with a much smaller loss factor for these SSPN filled polymer nanocomposites, compared to conventional PNCs filled with rigid NPs. Furthermore, the change of the arm length of the SSPNs is found to exhibit the same effect on the mechanical and viscoelastic properties, as the variation of the number of the arms. In general, this work shows that these new SSPN filled polymer nanocomposites can exceed conventional PNCs, by manipulating the robustness of the SSPNs using, for example, the number and length of the arms. This research may provide guidelines for the investigation of the structure-property relationships of the topological structure of polymeric nanoparticles.
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Affiliation(s)
- Guanyi Hou
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing, 100048, People's Republic of China
| | - Sai Li
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China. .,Center of Advanced Elastomer Materials, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Jun Liu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China. .,Center of Advanced Elastomer Materials, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Yunxuan Weng
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing, 100048, People's Republic of China
| | - Liqun Zhang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China. .,Center of Advanced Elastomer Materials, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
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10
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Bonini M, Fratini E, Faraone A. Dynamics of Water and Other Molecular Liquids Confined Within Voids and on Surface of Lignin Aggregates in Aging Bio Crude Oils. Front Chem 2022; 9:753958. [PMID: 34976946 PMCID: PMC8718914 DOI: 10.3389/fchem.2021.753958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 10/26/2021] [Indexed: 11/14/2022] Open
Abstract
Neutron scattering methods were employed to study the microscopic structure and dynamics of Bio Crude Oils (BCOs) and their lignin fractions. The structure of the carbonaceous aggregates was investigated using Small Angle Neutron Scattering to reveal a fractal hierarchy as well as a growth of the aggregates as the aging of the BCO proceeds. Elastic Neutron Scattering measurements indicate that BCO liquid phase, comprised of water and other hydrogenated molecular liquids, is in a state of extreme confinement. Quasi-Elastic Neutron Scattering yields information on the molecular motions, indicating that long range translational diffusion is suppressed and only localized dynamics take place on the tens of picosecond time range. The obtained results provide quantitative information on the molecular activity, as aging proceed, in these reactive materials of relevance as potential renewable energy sources.
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Affiliation(s)
- Massimo Bonini
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Sesto Fiorentino, Italy
| | - Emiliano Fratini
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Sesto Fiorentino, Italy
| | - Antonio Faraone
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, United States
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11
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Darvishi S, Nazeer MA, Tyagi M, Zhang Q, Narayanan S, Kizilel S, Senses E. Nonlinear Architectures Can Alter the Dynamics of Polymer–Nanoparticle Composites. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saeid Darvishi
- Department of Chemical and Biological Engineering, Koc University, Sariyer, Istanbul 34450, Turkey
| | - Muhammad Anwaar Nazeer
- Department of Chemical and Biological Engineering, Koc University, Sariyer, Istanbul 34450, Turkey
- School of Engineering and Technology, National Textile University, Faisalabad 37610, Pakistan
| | - Madhusudan Tyagi
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8562, United States
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115, United States
| | - Qingteng Zhang
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Suresh Narayanan
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Seda Kizilel
- Department of Chemical and Biological Engineering, Koc University, Sariyer, Istanbul 34450, Turkey
| | - Erkan Senses
- Department of Chemical and Biological Engineering, Koc University, Sariyer, Istanbul 34450, Turkey
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12
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Bailey EJ, Tyagi M, Winey KI. Correlation between backbone and pyridine dynamics in poly(
2‐vinyl
pyridine)/silica polymer nanocomposites. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Eric J. Bailey
- Department of Materials Science and Engineering University of Pennsylvania Philadelphia Pennsylvania USA
| | - Madhusudan Tyagi
- Center for Neutron Research National Institute of Standards and Technology Gaithersburg Maryland USA
- Department of Materials Science and Engineering University of Maryland College Park Maryland USA
| | - Karen I. Winey
- Department of Materials Science and Engineering University of Pennsylvania Philadelphia Pennsylvania USA
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13
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Kwon NK, Kim H, Shin TJ, Saalwächter K, Park J, Kim SY. Control of Particle Dispersion with Autophobic Dewetting in Polymer Nanocomposites. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00190] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | | | | | - Kay Saalwächter
- Institut für Physik-NMR, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, D-06120 Halle, Germany
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14
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Bailey EJ, Winey KI. Dynamics of polymer segments, polymer chains, and nanoparticles in polymer nanocomposite melts: A review. Prog Polym Sci 2020. [DOI: 10.1016/j.progpolymsci.2020.101242] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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15
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Loo WS, Faraone A, Grundy LS, Gao KW, Balsara NP. Polymer Dynamics in Block Copolymer Electrolytes Detected by Neutron Spin Echo. ACS Macro Lett 2020; 9:639-645. [PMID: 35648570 DOI: 10.1021/acsmacrolett.0c00236] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Polymer chain dynamics of a nanostructured block copolymer electrolyte, polystyrene-block-poly(ethylene oxide) (SEO) mixed with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt, are investigated by neutron spin echo (NSE) spectroscopy on the 0.1-100 ns time scale and analyzed using the Rouse model at short times (t ≤ 10 ns) and the reptation tube model at long times (t ≥ 50 ns). In the Rouse regime, the monomeric friction coefficient increases with increasing salt concentration, as seen previously in homopolymer electrolytes. In the reptation regime, the tube diameters, which represent entanglement constraints, decrease with increasing salt concentration. The normalized longest molecular relaxation time, calculated from the NSE results, increases with increasing salt concentration. We argue that quantifying chain motion in the presence of ions is essential for predicting the behavior of polymer-electrolyte-based batteries operating at large currents.
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Affiliation(s)
- Whitney S. Loo
- Department of Chemical and Biomolecular Engineering, University of California−Berkeley, Berkeley, California 94720, United States
| | - Antonio Faraone
- National Institute of Standards and Technology Center for Neutron Research, Gaithersburg, Maryland 20899, United States
| | - Lorena S. Grundy
- Department of Chemical and Biomolecular Engineering, University of California−Berkeley, Berkeley, California 94720, United States
| | - Kevin W. Gao
- Department of Chemical and Biomolecular Engineering, University of California−Berkeley, Berkeley, California 94720, United States
| | - Nitash P. Balsara
- Department of Chemical and Biomolecular Engineering, University of California−Berkeley, Berkeley, California 94720, United States
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Swain A, Begam N, Chandran S, Bobji MS, Basu JK. Engineering interfacial entropic effects to generate giant viscosity changes in nanoparticle embedded polymer thin films. SOFT MATTER 2020; 16:4065-4073. [PMID: 32286599 DOI: 10.1039/d0sm00019a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Thin polymer and polymer nanocomposite (PNC) films are being extensively used as advanced functional coating materials in various technological applications. Since it is widely known that various properties of these thin films, especially their thermo-mechanical behavior, can be considerably different from the bulk depending on the thickness as well as interaction with surrounding media, it is imperative to study these properties directly on the films. However, quite often, it becomes difficult to perform these measurements reliably due to a dearth of techniques, especially to measure mechnical or transport properties like the viscosity of thin polymer or PNC films. Here, we demonstrate a new method to study the viscosity of PNC thin films using atomic force microscopy based force-distance spectroscopy. Using this method we investigated viscosity and the glass transition, Tg, of PNC thin films consisting of polymer grafted nanoparticles (PGNPs) embedded in un-entangled homopolymer melt films. The PGNP-polymer interfacial entropic interaction parameter, f, operationally controlled through the ratio of grafted and matrix molecular weight, was systematically tuned while maintaining good dispersion even at very high PGNP loadings, φ. We observed both a significant reduction (low f) and giant enhancement (high f) in the viscosity of the PNC thin films with the effect becoming more prominent with increasing φ. Significantly, none of the established theoretical models for viscosity changes observed earlier in suspensions or polymer nanocomposites can explain the observed viscosity variation. Our results thus not only demonstrate the tunability of the interfacial entropic effect to facilitate a dramatic change in the viscosity of PNC coatings, which could be of great utility in various applications of these materials, but also suggest a new regime of viscosity variation in athermal PNC films indicating the possible need for a new theoretical model.
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Affiliation(s)
- Aparna Swain
- Department of Physics, Indian Institute of Science, Bangalore 560012, India.
| | - Nafisa Begam
- Department of Physics, Indian Institute of Science, Bangalore 560012, India.
| | | | - M S Bobji
- Indian Institute of Science, Department of Mechanical Engineering, Indian Institute of Science, Bangalore, 560012, India
| | - J K Basu
- Department of Physics, Indian Institute of Science, Bangalore 560012, India.
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17
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Abstract
We review recent neutron scattering work and related results from simulation and complementary techniques focusing on the microscopic dynamics of polymers under confinement. Confinement is either realized in model porous materials or in polymer nanocomposites (PNC). The dynamics of such confined polymers is affected on the local segmental level, the level of entanglements as well as on global levels: (i) at the segmental level the interaction with the surface is of key importance. At locally repulsive surfaces compared to the bulk the segmental dynamics is not altered. Attractive surfaces slow down the segmental dynamics in their neighborhood but do not give rise to dead, glassy layers. (ii) Confinement generally has little effect on the inter-chain entanglements: both for weakly as well as for marginally confined polymers the reptation tube size is not changed. Only for strongly confined polymers disentanglement takes place. Similarly, in PNC at higher NP loading disentanglement phenomena are observed; in addition, at very high loading a transition from polymer caused topological constraints to purely geometrical constraints is observed. (iii) On the more global scale NSE experiments revealed important information on the nature of the interphase between adsorbed layer and bulk polymer. (iv) Polymer grafts at NP mutually confine each other, an effect that is most pronounced for one component NP. (v) Global diffusion of entangled polymers both in weakly and strongly attractive PNC is governed by the ratio of bottle-neck to chain size that characterizes the 'entropic barrier' for global diffusion.
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Affiliation(s)
- Dieter Richter
- Jülich Centre for Neutron Science (JCNS-1) and Institute of Complex Systems (ICS-1), Forschungszentrum Jülich GmbH, Jülich, Germany.
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Robles-Hernández B, Monnier X, Pomposo JA, Gonzalez-Burgos M, Cangialosi D, Alegría A. Glassy Dynamics of an All-Polymer Nanocomposite Based on Polystyrene Single-Chain Nanoparticles. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01257] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Beatriz Robles-Hernández
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Xavier Monnier
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | - Jose A. Pomposo
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- IKERBASQUE-Basque Foundation for Science, María Díaz de Haro 3, E-48013 Bilbao, Spain
| | - Marina Gonzalez-Burgos
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Daniele Cangialosi
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | - Angel Alegría
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
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