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Zhang W, Hu Z, Lu Y, Zhou T, Zhang H, Zhao X, Liu L, Zhang L, Gao Y. Molecular Dynamics Simulation on the Heat Transfer in the Cross-Linked Poly(dimethylsiloxane). J Phys Chem B 2023; 127:10243-10251. [PMID: 37975617 DOI: 10.1021/acs.jpcb.3c06476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
In this work, the effect of cross-linking degree and stretching on the thermal conductivity of poly(dimethylsiloxane) (PDMS) is explored by performing a molecular dynamics simulation. Our results demonstrate that the thermal conductivity of PDMS exhibits a monotonous rise with an increase in the cross-linking degree. By decomposing the total heat flux into three microscopic heat transfer modes, the high cross-linking degree improves the contribution from bonding interactions to the heat transfer more than that from the nonbonding interactions. An analysis of the vibrational density of states shows a blue-shift of the vibrational modes at low frequencies, indicating a large phonon group velocity due to the strong interchain bonding interaction. From the spectral distribution of heat flux, the spectral contributions are shifted toward the higher frequencies with the increasing cross-linking degree, which reflects more contribution from the high-frequency modes to the heat transfer. Stretching can improve the thermal conductivity parallel to the tensile direction with the increase in strain. This is mainly due to the further improved contribution of bonding interactions or high-frequency modes to heat transfer. Interestingly, the anisotropy of the thermal conductivity first decreases and then increases with the increasing cross-linking degree. Our study conducts a detailed investigation of the thermal conductivity of cross-linked PDMS, providing guidance on the application of thermal interface materials.
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Affiliation(s)
- Wenfeng Zhang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Zoumeng Hu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Yonglai Lu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Tianhang Zhou
- College of Carbon Neutrality Future Technology, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, People's Republic of China
| | - Huan Zhang
- Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, People's Republic of China
| | - Xiuying Zhao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Li Liu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, 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
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Yangyang Gao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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2
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Wei X, Hernandez R. Heat Transfer Enhancement in Tree-Structured Polymer Linked Gold Nanoparticle Networks. J Phys Chem Lett 2023; 14:9834-9841. [PMID: 37890034 PMCID: PMC10642580 DOI: 10.1021/acs.jpclett.3c02367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023]
Abstract
Human brains use a tree-like neuron network for information processing at high efficiency and low energy consumption. Tree-like structures have also been engineered to enhance mass and heat transfer in various applications. In this work, we reveal the heat transfer mechanism in tree-structured polymer linked gold nanoparticle (AuNP) networks using atomistic simulations. We report both upward and downward heat fluxes between root and leaf nodes in tree-structured polyethylene (PE) and poly(p-phenylene) (PPP) linked AuNP networks at tree levels from 1 to 5. We found that the heat conductance increases with an increasing polymer tree level. The heat transfer enhancement is due to the resulting increase in the low-frequency vibrational modes. This and other thermal properties are affected by the location of the AuNPs in the tree. Moreover, complex tree structures with at least five levels were found to be robust in the sense that disabling half of the leaves did not change the overall heat conductance.
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Affiliation(s)
- Xingfei Wei
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Rigoberto Hernandez
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Department
of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Department
of Materials Science and Engineering, Johns
Hopkins University, Baltimore, Maryland 21218, United States
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3
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Darkwah WK, Appiagyei AB, Puplampu JB. Transforming the Petroleum Industry through Catalytic Oxidation Reactions vis-à-vis Preceramic Polymer Catalyst Supports. ACS OMEGA 2023; 8:34215-34234. [PMID: 37780012 PMCID: PMC10536879 DOI: 10.1021/acsomega.2c07562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 04/21/2023] [Indexed: 10/03/2023]
Abstract
Preceramic polymers, for instance, are used in a variety of chemical processing industries and applications. In this contribution, we report on the catalytic oxidation reactions generated using preceramic polymer catalyst supports. Also, we report the full knowledge of the use of the remarkable catalytic oxidation, and the excellent structures of these preceramic polymer catalyst supports are revealed. This finding, on the other hand, focuses on the functionality and efficacy of future applications of catalytic oxidation of preceramic polymer nanocrystals for energy and environmental treatment. The aim is to design future implementations that can address potential environmental impacts associated with fuel production, particularly in downstream petroleum industry processes. As a result, these materials are being considered as viable candidates for environmentally friendly applications such as refined fuel production and related environmental treatment.
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Affiliation(s)
- Williams Kweku Darkwah
- School
of Chemical Engineering, Faculty of Engineering, The University of New South Wales, Sydney, 2052 NSW, Australia
- Department
of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast 4P48+59H, Ghana
| | - Alfred Bekoe Appiagyei
- Department
of Chemical and Biological Engineering, Monash University, Wellington Road, Clayton, Melbourne, Victoria 3800, Australia
| | - Joshua B. Puplampu
- Department
of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast 4P48+59H, Ghana
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4
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Analysis of the Structure and the Thermal Conductivity of Semi-Crystalline Polyetheretherketone/Boron Nitride Sheet Composites Using All-Atom Molecular Dynamics Simulation. Polymers (Basel) 2023; 15:polym15020450. [PMID: 36679330 PMCID: PMC9862992 DOI: 10.3390/polym15020450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/09/2023] [Accepted: 01/12/2023] [Indexed: 01/19/2023] Open
Abstract
Thermal transport simulations were performed to investigate the important factors affecting the thermal conductivity based on the structure of semi-crystalline polyetheretherketone (PEEK), and the addition of boron nitride (BN) sheets. The molecular-level structural analysis facilitated the prediction of the thermal conductivity of the optimal structure of PEEK reflecting the best parameter value of the length of amorphous chains, and the ratio of linkage conformations, such as loops, tails, and bridges. It was found that the long heat transfer paths of polymer chains were induced by the addition of BN sheets, which led to the improvement of the thermal conductivities of the PEEK/BN composites. In addition, the convergence of the thermal conductivities of the PEEK/BN composites in relation to BN sheet size was verified by the disconnection of the heat transfer path due to aggregation of the BN sheets.
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5
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Wei X, Harazinska E, Zhao Y, Zhuang Y, Hernandez R. Thermal Transport through Polymer-Linked Gold Nanoparticles. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:18511-18519. [PMID: 36366755 PMCID: PMC9639611 DOI: 10.1021/acs.jpcc.2c05816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 09/28/2022] [Indexed: 06/16/2023]
Abstract
Polymer-nanoparticle networks have potential applications in molecular electronics and nanophononics. In this work, we use all-atom molecular dynamics to reveal the fundamental mechanisms of thermal transport in polymer-linked gold nanoparticle (AuNP) dimers at the molecular level. Attachment of the polymers to AuNPs of varying sizes allows the determination of effects from the flexibility of the chains when their ends are not held fixed. We report heat conductance (G) values for six polymers-viz. polyethylene, poly(p-phenylene), polyacene, polyacetylene, polythiophene, and poly(3,4-ethylenedioxythiophene)-that represent a broad range of stiffness. We address the multimode effects of polymer type, AuNP size, polymer chain length, polymer conformation, system temperature, and number of linking polymers on G. The combination of the mechanisms for phonon boundary scattering and intrinsic phonon scattering has a strong effect on G. We find that the values of G are larger for conjugated polymers because of the stiffness in their backbones. They are also larger in the low-temperature region for all polymers owing to the quenching of segmental rotations at low temperature. Our simulations also suggest that the total G is additive as the number of linking polymers in the AuNP dimer increases from 1 to 2 to 3.
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Affiliation(s)
- Xingfei Wei
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland21218, United States
| | - Ewa Harazinska
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland21218, United States
| | - Yinong Zhao
- Department
of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland21218, United States
| | - Yi Zhuang
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland21218, United States
| | - Rigoberto Hernandez
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland21218, United States
- Department
of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland21218, United States
- Department
of Materials Science and Engineering, Johns
Hopkins University, Baltimore, Maryland21218, United States
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6
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Klonos PA, Lazaridou M, Samiotaki C, Kyritsis A, Bikiaris DN. Dielectric and calorimetric study in renewable polymer blends based on poly(ethylene adipate) and poly(lactic acid) with microphase separation. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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7
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Gharib-Zahedi MR, Koochaki A, Alaghemandi M. Tuning the polymer thermal conductivity through structural modification induced by MoS 2 bilayers. SOFT MATTER 2022; 18:6927-6933. [PMID: 36052767 DOI: 10.1039/d2sm00660j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The present work refers to a physical and structural study of nanoconfined polymers in polymer-MoS2 nanocomposites as a function of MoS2-MoS2 interlayer distance. We applied reverse nonequilibrium molecular dynamics (RNEMD) simulations to investigate the thermal conductivity (λ) of polyamide oligomers confined by MoS2 bilayers. The results of this study indicate that thermal conductivity of polymer can be considerably enhanced when polymer chains are confined by MoS2 sheets, this behavior is more pronounced by charged surfaces. The presence of MoS2 surfaces leads to elongation as well as preferential alignment of polymer chains parallel to the MoS2 surfaces, which in turn results in higher order and denser packing of polymer content and hence larger thermal conductivity in comparison to the bulk polymer. Additionally, the analysis of the number of hydrogen bonds (HBs) in confined polymer chains suggests that a combined effect of the mentioned structural modification and enlarged values of HBs may cooperatively contribute to high polymer thermal conductivity, facilitating phonon transport. The results reported here suggest a significant way to design confined polymer-MoS2 composites for significantly improving thermal conductivity for a wide variety of applications.
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Affiliation(s)
| | - Amin Koochaki
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Republic of Ireland
| | - Mohammad Alaghemandi
- Department of Computer Science, Metropolitan College, Boston University, Boston, MA, USA
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8
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Kumar Rawat A, Chakraborty S, Kumar Mishra A, Goswami D. Achieving molecular distinction in alcohols with femtosecond thermal lens spectroscopy. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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9
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Reinforcing effects of carbon nanotubes on graphene/trans-1,4-polyisoprene/natural rubber composites. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03231-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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10
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Zhou T, Qiu D, Wu Z, Alberti SAN, Bag S, Schneider J, Meyer J, Gámez JA, Gieler M, Reithmeier M, Seidel A, Müller-Plathe F. Compatibilization Efficiency of Graft Copolymers in Incompatible Polymer Blends: Dissipative Particle Dynamics Simulations Combined with Machine Learning. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00821] [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)
- Tianhang Zhou
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Dejian Qiu
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Zhenghao Wu
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Simon A. N. Alberti
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Saientan Bag
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Jurek Schneider
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Jan Meyer
- Covestro Deutschland AG, Kaiser-Wilhelm-Allee 60, 51373 Leverkusen, Germany
| | - José A. Gámez
- Covestro Deutschland AG, Kaiser-Wilhelm-Allee 60, 51373 Leverkusen, Germany
| | - Mandy Gieler
- Covestro Deutschland AG, Kaiser-Wilhelm-Allee 60, 51373 Leverkusen, Germany
| | - Marina Reithmeier
- Covestro Deutschland AG, Kaiser-Wilhelm-Allee 60, 51373 Leverkusen, Germany
| | - Andreas Seidel
- Covestro Deutschland AG, Kaiser-Wilhelm-Allee 60, 51373 Leverkusen, Germany
| | - Florian Müller-Plathe
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
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11
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Yang X, Tao J, Liu Q, Zhang X, Cao B. Molecular dynamics simulation of thermophysical properties of binary RP-3 surrogate fuel mixtures containing trimethylbenzene, n-decane, and n-dodecane. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119258] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Song L, Zhang Y, Zhan J, An Y, Yang W, Tan J, Cheng L. Interfacial thermal resistance in polymer composites: a molecular dynamic perspective. MOLECULAR SIMULATION 2022. [DOI: 10.1080/08927022.2022.2071874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Lijian Song
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, People’s Republic of China
| | - Youchen Zhang
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, People’s Republic of China
| | - Jin Zhan
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, People’s Republic of China
| | - Ying An
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, People’s Republic of China
| | - Weimin Yang
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, People’s Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, People’s Republic of China
| | - Jing Tan
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, People’s Republic of China
| | - Lisheng Cheng
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, People’s Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, People’s Republic of China
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13
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Nagoya A, Kikkawa N, Ohba N, Baba T, Kajita S, Yanai K, Takeno T. Autonomous Search for Polymers with High Thermal Conductivity Using a Rapid Green–Kubo Estimation. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02267] [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)
- Akihiro Nagoya
- Quantum Computing Research Division, Toyota Central R&D Laboratories, Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Nobuaki Kikkawa
- Quantum Computing Research Division, Toyota Central R&D Laboratories, Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Nobuko Ohba
- Quantum Computing Research Division, Toyota Central R&D Laboratories, Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Takeshi Baba
- Quantum Computing Research Division, Toyota Central R&D Laboratories, Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Seiji Kajita
- Quantum Computing Research Division, Toyota Central R&D Laboratories, Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Kazuma Yanai
- Advanced Research and Innovation Center, DENSO Corporation, 500-1, Miyamiyama, Komenoki-cho, Nisshin, Aichi 470-0111, Japan
| | - Takanori Takeno
- Advanced Research and Innovation Center, DENSO Corporation, 500-1, Miyamiyama, Komenoki-cho, Nisshin, Aichi 470-0111, Japan
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14
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Ma R, Zhang H, Luo T. Exploring High Thermal Conductivity Amorphous Polymers Using Reinforcement Learning. ACS APPLIED MATERIALS & INTERFACES 2022; 14:15587-15598. [PMID: 35344333 DOI: 10.1021/acsami.1c23610] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Developing amorphous polymers with desirable thermal conductivity has significant implications, as they are ubiquitous in applications where thermal transport is critical. Conventional Edisonian approaches are slow and without guarantee of success in material development. In this work, using a reinforcement learning scheme, we design polymers with thermal conductivity above 0.400 W/m·K. We leverage a machine learning model trained against 469 thermal conductivity data calculated from high-throughput molecular dynamics (MD) simulations as the surrogate for thermal conductivity prediction, and we use a recurrent neural network trained with around one million virtual polymer structures as a polymer generator. For all generated polymers with thermal conductivity ≥0.400 W/m·K, we have evaluated their synthesizability by calculating the synthetic accessibility score and validated the thermal conductivity of selected polymers using MD simulations. The best thermally conductive polymer designed has an MD-calculated thermal conductivity of 0.693 W/m·K, which is also estimated to be easily synthesizable. Our demonstrated inverse design scheme based on reinforcement learning may advance polymer development with target properties, and the scheme can also be generalized to other material development tasks for different applications.
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Affiliation(s)
- Ruimin Ma
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Hanfeng Zhang
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Tengfei Luo
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
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15
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Wei X, Luo T. Effect of Side-Chain π-π Stacking on the Thermal Conductivity Switching in Azobenzene Polymers: A Molecular Dynamics Simulation Study. Phys Chem Chem Phys 2022; 24:10272-10279. [DOI: 10.1039/d2cp01325h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The light switchable thermal conductivity displayed by some polymers makes them promising for applications like data storage, temperature regulation and light switchable devices. In this study, the mechanism of thermal...
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16
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Guo Y, Zhou Y, Xu Y. Engineering polymers with metal-like thermal conductivity—Present status and future perspectives. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124168] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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17
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18
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Zhou T, Wu Z, Chilukoti HK, Müller-Plathe F. Sequence-Engineering Polyethylene-Polypropylene Copolymers with High Thermal Conductivity Using a Molecular-Dynamics-Based Genetic Algorithm. J Chem Theory Comput 2021; 17:3772-3782. [PMID: 33949863 DOI: 10.1021/acs.jctc.1c00134] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Polymer sequence engineering is emerging as a potential tool to modulate material properties. Here, we employ a combination of a genetic algorithm (GA) and atomistic molecular dynamics (MD) simulation to design polyethylene-polypropylene (PE-PP) copolymers with the aim of identifying a specific sequence with high thermal conductivity. PE-PP copolymers with various sequences at the same monomer ratio are found to have a broad distribution of thermal conductivities. This indicates that the monomer sequence has a crucial effect on thermal energy transport of the copolymers. A non-periodic and non-intuitive optimal sequence is indeed identified by the GA, which gives the highest thermal conductivity compared with any regular block copolymers, for example, diblock, triblock, and hexablock. In comparison to the bulk density, chain conformations, and vibrational density of states, the monomer sequence has the strongest impact on the efficiency of thermal energy transport via inter- and intra-molecular interactions. Our work highlights polymer sequence engineering as a promising approach for tuning the thermal conductivity of copolymers, and it provides an example application of integrating atomistic MD modeling with the GA for computational material design.
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Affiliation(s)
- Tianhang Zhou
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Street 8, 64287 Darmstadt, Germany
| | - Zhenghao Wu
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Street 8, 64287 Darmstadt, Germany
| | - Hari Krishna Chilukoti
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Street 8, 64287 Darmstadt, Germany.,Department of Mechanical Engineering, National Institute of Technology Warangal, Warangal, 506004 Telangana, India
| | - Florian Müller-Plathe
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Street 8, 64287 Darmstadt, Germany
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19
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Wang Y, Chang Z, Gao K, Li Z, Hou G, Liu J, Zhang L. Designing high thermal conductivity of polydimethylsiloxane filled with hybrid h-BN/MoS2 via molecular dynamics simulation. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123697] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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Zheng H, Wu K, Chen W, Nan B, Qu Z, Lu M. High Intrinsic Thermal Conductivity of Polythiophene by Reducing Steric Hindrance and Enhancing p‐π Conjugation. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202000418] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Haoting Zheng
- Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou 510650 P.R. China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics Guangzhou 510650 P.R. China
- CAS Engineering Laboratory for Special Fine Chemicals Guangzhou 510650 P.R. China
| | - Kun Wu
- Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou 510650 P.R. China
- University of Chinese Academy of Sciences Beijing 10049 P.R. China
| | - Weilong Chen
- Department of Chemistry City University of Hong Kong Hong Kong
| | - Bingfei Nan
- CASH GCC (Nanxiong) Research Institute of New Materials Co., Ltd Guangzhou 510650 P.R. China
| | - Zhencai Qu
- CAS Engineering Laboratory for Special Fine Chemicals Guangzhou 510650 P.R. China
| | - Mangeng Lu
- Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou 510650 P.R. China
- Department of Chemistry City University of Hong Kong Hong Kong
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21
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He J, Zhang L, Liu L. The hydrogen-bond configuration modulates the energy transfer efficiency in helical protein nanotubes. NANOSCALE 2021; 13:991-999. [PMID: 33367447 DOI: 10.1039/d0nr06031c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Energy transport in proteins is critical to a variety of physical, chemical, and biological processes in living organisms. While strenuous efforts have been made to study vibrational energy transport in proteins, thermal transport processes across the most fundamental building blocks of proteins, i.e. helices, are not well understood. This work studies energy transport in a group of "isomer" helices. The π-helix is shown to have the highest thermal conductivity, 110% higher than that of the α-helix and 207% higher than that of the 310-helix. The H-bond connectivity is found to govern thermal transport mechanisms including the phonon spectral energy density, dispersion, mode-specific transport, group velocity, and relaxation time. The energy transport is strongly correlated with the H-bond strength which is also modulated by the H-bond connectivity. These fundamental insights provide a novel perspective for understanding energy transfer in proteins and guiding a rational molecule-level design of novel materials with configurable H-bonds.
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Affiliation(s)
- Jinlong He
- Department of Mechanical Engineering, Temple University, Philadelphia, PA 19122, USA. and Department of Mechanical and Aerospace Engineering, Utah State University, Logan, Utah 84322, USA
| | - Lin Zhang
- Department of Engineering Mechanics, School of Civil Engineering, Shandong University, Jinan, 250061, P.R. China and Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Ling Liu
- Department of Mechanical Engineering, Temple University, Philadelphia, PA 19122, USA.
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22
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Donovan BF, Warzoha RJ, Cosby T, Giri A, Wilson AA, Borgdorff AJ, Vu NT, Patterson EA, Gorzkowski EP. Strained Polymer Thermal Conductivity Enhancement Counteracted by Additional Off-Axis Strain. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01243] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brian F. Donovan
- Department of Physics, The United States Naval Academy, Annapolis, Maryland 21402, United States
| | - Ronald J. Warzoha
- Department of Mechanical and Aerospace Engineering, The United States Naval Academy, Annapolis, Maryland 21402, United States
| | - Tyler Cosby
- Department of Chemistry, The United States Naval Academy, Annapolis, Maryland 21402, United States
| | - Ashutosh Giri
- Department of Mechanical and Aerospace Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Adam A. Wilson
- US Army Research Laboratory, Adelphi, Maryland 20783, United States
| | - Andrew J. Borgdorff
- Department of Physics, The United States Naval Academy, Annapolis, Maryland 21402, United States
| | - Nicholas T. Vu
- Department of Mechanical and Aerospace Engineering, The United States Naval Academy, Annapolis, Maryland 21402, United States
| | - Eric A. Patterson
- Materials Science and Technology Division, Naval Research Labs, Washington, D.C., District of Columbia 20375, United States
| | - Edward P. Gorzkowski
- Materials Science and Technology Division, Naval Research Labs, Washington, D.C., District of Columbia 20375, United States
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23
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Morshedifard A, Moshiri A, Krakowiak KJ, Abdolhosseini Qomi MJ. Spectral attributes of sub-amorphous thermal conductivity in cross-linked organic-inorganic hybrids. NANOSCALE 2020; 12:13491-13500. [PMID: 32555900 DOI: 10.1039/d0nr02657c] [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
Organic-inorganic hybrids have found increasing applications for thermal management across various disciplines. Such materials can achieve thermal conductivities below the so-called "amorphous limit" of their constituents' thermal conductivity. Despite their technological significance, a complete understanding of the origins of this thermal conductivity reduction remains elusive in these materials. In this paper, we develop a prototypical cross-linked organic-inorganic layered system, to investigate the spectral origins of its sub-amorphous thermal conductivity. Initially, we study the atomic structure of the model and find that besides polymer chain length, the relative drift of the layers governs the reduction in computed basal spacing, in agreement with experimental measurements. We, subsequently, find that organic cross-linking results in up to 40% reduction in thermal conductivity compared to inorganic samples. An in-depth investigation of vibrational modes reveals that this reduction is the result of reduced mode diffusivities, which in turn is a consequence of a vibrational mismatch between the organic and inorganic constituents. We also show that the contribution of propagating modes to the total thermal conductivity is not affected by organic cross-linking. Our approach paves the path toward a physics-informed analysis and design of a wide range of multifunctional hybrid nanomaterials for thermal management applications among others.
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Affiliation(s)
- Ali Morshedifard
- Department of Civil and Environmental Engineering, Henry Samueli School of Engineering, E4130 Engineering Gateway, University of California, Irvine, CA 92697-2175, USA.
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24
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Enhancing the Thermo-Mechanical Property of Polymer by Weaving and Mixing High Length-Diameter Ratio Filler. Polymers (Basel) 2020; 12:polym12061255. [PMID: 32486186 PMCID: PMC7361691 DOI: 10.3390/polym12061255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/06/2020] [Accepted: 02/10/2020] [Indexed: 01/28/2023] Open
Abstract
Improving thermo-mechanical characteristics of polymers can efficiently promote their applications in heat exchangers and thermal management. However, a feasible way to enhance the thermo-mechanical property of bulk polymers at low filler content still remains to be explored. Here, we propose mixing high length-diameter ratio filler such as carbon nanotube (CNT), boron nitride (BN) nanotube, and copper (Cu) nanowire, in the woven polymer matrix to meet the purpose. Through molecular dynamics (MD) simulation, the thermal properties of three woven polymers including woven polyethylene (PE), woven poly (p-phenylene) (PPP), and woven polyacetylene (PA) are investigated. Besides, using woven PE as a polymer matrix, three polymer nanocomposites, namely PE-CNT, PE-BN, and PE-Cu, are constructed by mixing CNT, BN nanotube, and Cu nanowire respectively, whose thermo-mechanical characteristics are compared via MD simulation. Morphology and phonons spectra analysis are conducted to reveal the underlying mechanisms. Furthermore, impacts of electron-phonon coupling and electrical field on the thermal conductivity of PE-Cu are uncovered via two temperature model MD simulation. Classical theoretical models are modified to predict the effects of filler and matrix on the thermal conductivity of polymer nanocomposites. This work can provide useful guidelines for designing thermally conductive bulk polymers and polymer nanocomposites.
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25
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Hashimoto M, Imoto H, Matsukawa K, Naka K. Coexistence of Optical Transparency, Hydrophobicity, and High Thermal Conductivity in Beads-on-String-Shaped Polyureas Induced by Disordered Hydrogen-Bond Networks. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00270] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Mari Hashimoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kimihiro Matsukawa
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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26
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Nieto Simavilla D, Sgouros AP, Vogiatzis GG, Tzoumanekas C, Georgilas V, Verbeeten WMH, Theodorou DN. Molecular Dynamics Test of the Stress-Thermal Rule in Polyethylene and Polystyrene Entangled Melts. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David Nieto Simavilla
- Universidad de Burgos, Burgos 09006, Spain
- Basque Center for Applied Mathematics, Bilbao 48009, Spain
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