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Kemppainen J, Gissinger JR, Gowtham S, Odegard GM. LUNAR: Automated Input Generation and Analysis for Reactive LAMMPS Simulations. J Chem Inf Model 2024; 64:5108-5126. [PMID: 38926930 PMCID: PMC11234336 DOI: 10.1021/acs.jcim.4c00730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 06/18/2024] [Accepted: 06/18/2024] [Indexed: 06/28/2024]
Abstract
Generating simulation-ready molecular models for the LAMMPS molecular dynamics (MD) simulation software package is a difficult task and impedes the more widespread and efficient use of MD in materials design and development. Fixed-bond force fields generally require manual assignment of atom types, bonded interactions, charges, and simulation domain sizes. A new LAMMPS pre- and postprocessing toolkit (LUNAR) is presented that efficiently builds molecular systems for LAMMPS. LUNAR automatically assigns atom types, generates bonded interactions, assigns charges, and provides initial configuration methods to generate large molecular systems. LUNAR can also incorporate chemical reactivity into simulations by facilitating the use of the REACTER protocol. Additionally, LUNAR provides postprocessing for free volume calculations, cure characterization calculations, and property predictions from LAMMPS thermodynamic outputs. LUNAR has been validated via building and simulation of pure epoxy and cyanate ester polymer systems with a comparison of the corresponding predicted structures and properties to benchmark values, including experimental results from the literature. LUNAR provides the tools for the computationally driven development of next-generation composite materials in the Integrated Computational Materials Engineering (ICME) and Materials Genome Initiative (MGI) frameworks. LUNAR is written in Python with the usage of NumPy and can be used via a graphical user interface, a command line interface, or an integrated design environment. LUNAR is freely available via GitHub.
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Affiliation(s)
- Josh Kemppainen
- Michigan
Technological University, Houghton, Michigan 49931, United States
| | - Jacob R. Gissinger
- Stevens
Institute of Technology, Hoboken, New Jersey 07030, United States
| | - S. Gowtham
- Michigan
Technological University, Houghton, Michigan 49931, United States
| | - Gregory M. Odegard
- Michigan
Technological University, Houghton, Michigan 49931, United States
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2
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Chen J, Xiao J, Han X, Sima X, Guo W. An HA/PEEK scaffold with modified crystallinity via 3D-bioprinting for multiple applications in hard tissue engineering. Biomed Mater 2023; 18:065021. [PMID: 37852224 DOI: 10.1088/1748-605x/ad0476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 10/18/2023] [Indexed: 10/20/2023]
Abstract
Hard tissues, especially teeth and bones, are highly mineralized and the large-scale defect or total loss of them is irreversible. There is still no ideal strategy for the reconstruction of various hard tissue defects that can achieve the balance between biological and mechanical properties. Polyether ether ketone (PEEK) has the potential to substitute for natural hard tissue in defect areas but is limited by its biological inertness. The addition of hydroxyapatite (HA) can significantly improve the osteogenic properties and osteointegration of PEEK materials. But the mechanical properties of HA/PEEK scaffolds are far from satisfaction making scaffolds easy to fracture. We put forward a strategy to balance the mechanical and biological properties of HA/PEEK scaffolds via the regulation of the inner crystallinity and HA mixing ratio and we systematically evaluated the modified HA/PEEK scaffolds through material characterization,in vitroandin vivoexperiments. And we found that the 20%HA/PEEK scaffolds with low crystallinity achieved the required strength and elasticity, and exhibited the characteristics of promoting the proliferation, migration and osteogenic differentiation of bone marrow mesenchymal stem cells. The results of the implantation of beagles' teeth, mandible and rib showed that the 20%HA/PEEK scaffold with low crystallinity could well withstand the local complex force in the defect area and combine well with natural bone tissue, which made it a candidate for a practical versatile hard tissue engineering scaffold.
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Affiliation(s)
- Jiahao Chen
- State Key Laboratory of Oral Disease & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- Frontier Innovation Center for Dental Medicine Plus, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Jingyi Xiao
- State Key Laboratory of Oral Disease & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- Frontier Innovation Center for Dental Medicine Plus, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Xue Han
- State Key Laboratory of Oral Disease & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- Frontier Innovation Center for Dental Medicine Plus, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Xiutian Sima
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
| | - Weihua Guo
- State Key Laboratory of Oral Disease & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- Frontier Innovation Center for Dental Medicine Plus, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
- Yunnan Key Laboratory of Stomatology, Affiliated Hospital of Stomatology, School of Stomatology, Kunming Medical University, Kunming, People's Republic of China
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3
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Raj A, Alvi SMAA, Islam K, Motalab M, Xu S. An Atomistic Study of the Tensile Deformation of Carbon Nanotube-Polymethylmethacrylate Composites. Polymers (Basel) 2023; 15:2956. [PMID: 37447601 DOI: 10.3390/polym15132956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/29/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
There has been growing interest in polymer/carbon nanotube (CNT) composites due to an exceptional enhancement in mechanical, structural, thermal, and electronic properties resulting from a small percentage of CNTs. However, the performance of these composites is influenced by the type of polymer used. PMMA is a polymer of particular interest among many other polymers because of its biomaterial applications due to its biocompatibility, non-toxicity, and non-biodegradability. In this research, we utilized a reactive force field to conduct molecular dynamics simulations to investigate changes in the mechanical properties of single-walled carbon nanotube (SWCNT)-reinforced Poly (methyl methacrylate) (PMMA) matrix composites. To explore the potential of SWCNT-reinforced PMMA composites in these applications, we conducted simulations with varying CNT diameters (0.542-1.08 nm), CNT volume fractions (8.1-16.5%), and temperatures (100 K-700 K). We also analyzed the dependence of Young's modulus and interaction energy with different CNT diameters, along with changes in fracture toughness with varying temperatures. Our findings suggest that incorporating a small amount of SWCNT into the PMMA polymer matrix could significantly enhance the mechanical properties of the resulting composite. It is also found that the double-walled carbon nanotube has roughly twice the tensile strength of SWCNT, while maintaining the same simulation cell dimensions.
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Affiliation(s)
- Anshu Raj
- School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019, USA
| | - Sk Md Ahnaf Akif Alvi
- Department of Materials Science and Engineering, Texas A & M University, College Station, TX 77843, USA
| | - Khayrul Islam
- Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, USA
| | - Mohammad Motalab
- Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Shuozhi Xu
- School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019, USA
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4
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Nepal D, Kang S, Adstedt KM, Kanhaiya K, Bockstaller MR, Brinson LC, Buehler MJ, Coveney PV, Dayal K, El-Awady JA, Henderson LC, Kaplan DL, Keten S, Kotov NA, Schatz GC, Vignolini S, Vollrath F, Wang Y, Yakobson BI, Tsukruk VV, Heinz H. Hierarchically structured bioinspired nanocomposites. NATURE MATERIALS 2023; 22:18-35. [PMID: 36446962 DOI: 10.1038/s41563-022-01384-1] [Citation(s) in RCA: 69] [Impact Index Per Article: 69.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
Next-generation structural materials are expected to be lightweight, high-strength and tough composites with embedded functionalities to sense, adapt, self-repair, morph and restore. This Review highlights recent developments and concepts in bioinspired nanocomposites, emphasizing tailoring of the architecture, interphases and confinement to achieve dynamic and synergetic responses. We highlight cornerstone examples from natural materials with unique mechanical property combinations based on relatively simple building blocks produced in aqueous environments under ambient conditions. A particular focus is on structural hierarchies across multiple length scales to achieve multifunctionality and robustness. We further discuss recent advances, trends and emerging opportunities for combining biological and synthetic components, state-of-the-art characterization and modelling approaches to assess the physical principles underlying nature-inspired design and mechanical responses at multiple length scales. These multidisciplinary approaches promote the synergetic enhancement of individual materials properties and an improved predictive and prescriptive design of the next era of structural materials at multilength scales for a wide range of applications.
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Affiliation(s)
- Dhriti Nepal
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, OH, USA.
| | - Saewon Kang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Katarina M Adstedt
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Krishan Kanhaiya
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, CO, USA
| | - Michael R Bockstaller
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - L Catherine Brinson
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, USA
| | - Markus J Buehler
- Department of Civil and Environmental Engineering, MIT, Cambridge, MA, USA
| | - Peter V Coveney
- Department of Chemistry, University College London, London, UK
| | - Kaushik Dayal
- Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Jaafar A El-Awady
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Luke C Henderson
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, Australia
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA
| | - Sinan Keten
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Nicholas A Kotov
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - George C Schatz
- Department of Chemistry, Northwestern University, Evanston, IL, USA
| | - Silvia Vignolini
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | | | - Yusu Wang
- Halıcıoğlu Data Science Institute, University of California San Diego, La Jolla, CA, USA
| | - Boris I Yakobson
- Department of Materials Science and Nanoengineering, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
| | - Hendrik Heinz
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, CO, USA.
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5
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Kaewnu K, Boonna S, Kongkaew S, Phonchai A, Chaisiwamongkhol K, Thongprajukaew K, Limbut W. A portable colorimetric device based on PVDF indicator gel for formaldehyde detection in food and wood products. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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6
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Abbasi Moud A. Advanced cellulose nanocrystals (CNC) and cellulose nanofibrils (CNF) aerogels: Bottom-up assembly perspective for production of adsorbents. Int J Biol Macromol 2022; 222:1-29. [PMID: 36156339 DOI: 10.1016/j.ijbiomac.2022.09.148] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/04/2022] [Accepted: 09/16/2022] [Indexed: 12/25/2022]
Abstract
The most common and abundant polymer in nature is the linear polysaccharide cellulose, but processing it requires a new approach since cellulose degrades before melting and does not dissolve in ordinary organic solvents. Cellulose aerogels are exceptionally porous (>90 %), have a high specific surface area, and have low bulk density (0.0085 mg/cm3), making them suitable for a variety of sophisticated applications including but not limited to adsorbents. The production of materials with different qualities from the nanocellulose based aerogels is possible thanks to the ease with which other chemicals may be included into the structure of nanocellulose based aerogels; despite processing challenges, cellulose can nevertheless be formed into useful, value-added products using a variety of traditional and cutting-edge techniques. To improve the adsorption of these aerogels, rheology, 3-D printing, surface modification, employment of metal organic frameworks, freezing temperature, and freeze casting techniques were all investigated and included. In addition to exploring venues for creation of aerogels, their integration with CNC liquid crystal formation were also explored and examined to pursue "smart adsorbent aerogels". The objective of this endeavour is to provide a concise and in-depth evaluation of recent findings about the conception and understanding of nanocellulose aerogel employing a variety of technologies and examination of intricacies involved in enhancing adsorption properties of these aerogels.
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Affiliation(s)
- Aref Abbasi Moud
- Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada.
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7
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Caro-Briones R, García-Pérez BE, Martín-Martínez ES, Báez-Medina H, Cruz-Reyes IG, del Río JM, Martínez-Gutiérrez H, Corea M. Influence of Carbon Nanotubes Concentration on Mechanical and Electrical Properties of Poly(styrene-co-acrylonitrile) Composite Yarns Electrospun. Polymers (Basel) 2021; 13:polym13213655. [PMID: 34771212 PMCID: PMC8587041 DOI: 10.3390/polym13213655] [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: 10/07/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 11/16/2022] Open
Abstract
In this work, the influence of carbon nanotubes (CNTs) content on the mechanical and electrical properties of four series of polymeric matrix were made and their cytotoxicity on cells was evaluated to consider their use as a possible artificial muscle. For that, polymer composite yarns were electrospun using polymeric solutions at 10 wt.%. of poly(styrene-co-acrylonitrile) P(S:AN) and P(S:AN-acrylic acid) P(S:AN-AA) at several monomeric concentrations, namely 0:100, 20:80, 40:60, 50:50 (wt.%:wt.%), and 1 wt.% of AA. Carbon nanotubes (CNTs) were added to the polymeric solutions at two concentrations, 0.5 and 1.0 wt.%. PMCs yarns were collected using a blade collector. Mechanical and electrical properties of polymeric yarns indicated a dependence of CNTs content into yarns. Three areas could be found in fibers: CNTs bundles zones, distributed and aligned CNTs zones, and polymer-only zones. PMCs yarns with 0.5 wt.% CNTs concentration were found with a homogenous nanotube dispersion and axial alignment in polymeric yarn, ensuring load transfer on the polymeric matrix to CNTs, increasing the elastic modulus up to 27 MPa, and a maximum electrical current of 1.8 mA due to a good polymer–nanotube interaction.
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Affiliation(s)
- Rubén Caro-Briones
- Escuela Superior de Ingeniería Química e Industrias Extractivas, Instituto Politécnico Nacional, Av. Luis Enrique Erro S/N, Unidad Profesional Adolfo López Mateos, Zacatenco, Alcaldía Gustavo A. Madero, Ciudad de México C.P. 07738, Mexico;
| | - Blanca Estela García-Pérez
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Unidad Profesional Lázaro Cárdenas Prolongación de Carpio y Plan de Ayala S/N Col. Santo Tomas, Alcaldía Miguel Hidalgo, Ciudad de México C.P. 11340, Mexico; (B.E.G.-P.); (I.G.C.-R.)
| | - Eduardo San Martín-Martínez
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Instituto Politécnico Nacional, Calzada Legaria No. 694 Col. Irrigación, Alcaldía Miguel Hidalgo, Ciudad de México C.P. 11500, Mexico;
| | - Héctor Báez-Medina
- Centro de Investigación en Computación, Instituto Politécnico Nacional, Av. Juan de Dios Bátiz, Esq. Miguel Othón de Mendizábal, Col. Nueva Industrial Vallejo, Alcaldía Gustavo A. Madero, Ciudad de México C.P. 07738, Mexico;
| | - Irlanda Grisel Cruz-Reyes
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Unidad Profesional Lázaro Cárdenas Prolongación de Carpio y Plan de Ayala S/N Col. Santo Tomas, Alcaldía Miguel Hidalgo, Ciudad de México C.P. 11340, Mexico; (B.E.G.-P.); (I.G.C.-R.)
| | - José Manuel del Río
- Departamento en Ingeniería en Metalurgia y Materiales, ESIQIE, Instituto Politécnico Nacional. Av. Luis Enrique Erro S/N, Unidad Profesional Adolfo López Mateos, Zacatenco, Alcaldía Gustavo A. Madero, Ciudad de México C.P. 07738, Mexico;
| | - Hugo Martínez-Gutiérrez
- Centro de Nanociencias y Micro y Nanotecnologías, Instituto Politécnico Nacional, Av. Luis Enrique Erro S/N, Unidad Profesional Adolfo López Mateos, Zacatenco, Alcaldía Gustavo A. Madero, Ciudad de México C.P. 07738, Mexico
- Correspondence: (H.M.-G.); or (M.C.)
| | - Mónica Corea
- Escuela Superior de Ingeniería Química e Industrias Extractivas, Instituto Politécnico Nacional, Av. Luis Enrique Erro S/N, Unidad Profesional Adolfo López Mateos, Zacatenco, Alcaldía Gustavo A. Madero, Ciudad de México C.P. 07738, Mexico;
- Correspondence: (H.M.-G.); or (M.C.)
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8
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Revealing the High-Modulus Mechanism of Polyimide Films Prepared with 3,4'-ODA. Polymers (Basel) 2021; 13:polym13183175. [PMID: 34578077 PMCID: PMC8473375 DOI: 10.3390/polym13183175] [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: 08/18/2021] [Revised: 09/12/2021] [Accepted: 09/16/2021] [Indexed: 12/02/2022] Open
Abstract
To prepare PIs (polyimides) with desirable thermal and mechanical properties is highly demanded due to their widespread applications in flexible optoelectronic devices and printed circuit boards. Here, the PI films of BPDA/4,4′-ODA, BPDA/3,4′-ODA, PMDA/4,4′-ODA, PMDA/3,4′-ODA systems were prepared, and it was found that the PIs with 3,4′-ODA always exhibit a high modulus compared with the PIs with 4,4′-ODA. To disclose the mechanism of high-modulus PI films with 3,4′-ODA, amorphous PI models and uniaxial drawing PI models were established and calculated based on MD simulation. The PI structural deformations at different length scales, i.e., molecular chain cluster scale and repeat unit scale, under the same stress were detailed and analyzed, including the variation of chain conformation, bond length, bond angle, internal rotation energy, and torsion angle. The results indicate that PIs with 3,4-ODA have higher internal rotation energy and smaller deformation with the same stress, consistent with the high modulus.
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9
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Zhang L, Zhang Y, Zhu F, Zhao Z, Yang Y, Sheng H, Hou X, Li H. SiC Nanowire-Si 3N 4 Nanobelt Interlocking Interfacial Enhancement of Carbon Fiber Composites with Boosting Mechanical and Frictional Properties. ACS APPLIED MATERIALS & INTERFACES 2021; 13:20746-20753. [PMID: 33896188 DOI: 10.1021/acsami.1c04682] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Carbon fiber composites composed of carbon fiber and pyrolytic carbon (PyC) matrix have great potential application in the brakes of aircrafts, where the combination of high mechanical strength and excellent frictional properties are required. In this work, two-component silicon-based interlocking enhancements were designed and constructed into carbon fiber composites for boosting the mechanical and frictional properties. Specially, silicon carbide nanowires (SiCnws) and silicon nitride nanobelts (Si3N4nbs) could form interlocking architectures, where SiCnws are rooted firmly on the carbon fiber surface in the radial direction and Si3N4nbs integrate the PyC matrix with carbon fibers together via a networked shape. SiCnws-Si3N4nbs not only refine the PyC matrix but also promote the bonding of the fiber/matrix interface and the cohesion strength of the PyC matrix, thus enhancing the mechanical and frictional properties. Benefiting from the SiCnws-Si3N4nbs synergistic effect and interlocking enhancement mechanism, the interlaminar shear strength and compressive strength of carbon fiber composites increased by 88.41% and 73.40%, respectively. In addition, the friction coefficient and wear rate of carbon fiber composites decreased by 39.50% and 69.88%, respectively. This work could open up an interlocking enhancement strategy for efficiently fabricating carbon fiber composites and promoting mechanical and frictional properties that could be used in the brakes of aircrafts.
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Affiliation(s)
| | | | | | | | | | - Hongchao Sheng
- Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Xianghui Hou
- Faculty of Engineering, The University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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10
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Liu J, Zeng J, Zhu C, Miao J, Huang Y, Heinz H. Interpretable molecular models for molybdenum disulfide and insight into selective peptide recognition. Chem Sci 2020; 11:8708-8722. [PMID: 34094188 PMCID: PMC8162032 DOI: 10.1039/d0sc01443e] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 07/16/2020] [Indexed: 12/14/2022] Open
Abstract
Molybdenum disulfide (MoS2) is a layered material with outstanding electrical and optical properties. Numerous studies evaluate the performance in sensors, catalysts, batteries, and composites that can benefit from guidance by simulations in all-atom resolution. However, molecular simulations remain difficult due to lack of reliable models. We introduce an interpretable force field for MoS2 with record performance that reproduces structural, interfacial, and mechanical properties in 0.1% to 5% agreement with experiments. The model overcomes structural instability, deviations in interfacial and mechanical properties by several 100%, and empirical fitting protocols in earlier models. It is compatible with several force fields for molecular dynamics simulation, including the interface force field (IFF), CVFF, DREIDING, PCFF, COMPASS, CHARMM, AMBER, and OPLS-AA. The parameters capture polar covalent bonding, X-ray structure, cleavage energy, infrared spectra, bending stability, bulk modulus, Young's modulus, and contact angles with polar and nonpolar solvents. We utilized the models to uncover the binding mechanism of peptides to the MoS2 basal plane. The binding strength of several 7mer and 8mer peptides scales linearly with surface contact and replacement of surface-bound water molecules, and is tunable in a wide range from -86 to -6 kcal mol-1. The binding selectivity is multifactorial, including major contributions by van-der-Waals coordination and charge matching of certain side groups, orientation of hydrophilic side chains towards water, and conformation flexibility. We explain the relative attraction and role of the 20 amino acids using computational and experimental data. The force field can be used to screen and interpret the assembly of MoS2-based nanomaterials and electrolyte interfaces up to a billion atoms with high accuracy, including multiscale simulations from the quantum scale to the microscale.
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Affiliation(s)
- Juan Liu
- Department of Chemical and Biological Engineering, University of Colorado- Boulder Boulder CO 80309 USA
| | - Jin Zeng
- Department of Chemical and Biological Engineering, University of Colorado- Boulder Boulder CO 80309 USA
| | - Cheng Zhu
- Department of Chemical and Biological Engineering, University of Colorado- Boulder Boulder CO 80309 USA
| | - Jianwei Miao
- Department of Physics and Astronomy, University of California Los Angeles California 90095 USA
- California NanoSystems Institute, University of California, Los Angeles CA 90095 USA
| | - Yu Huang
- California NanoSystems Institute, University of California, Los Angeles CA 90095 USA
- Department of Materials Science and Engineering, University of California, Los Angeles 90095 USA
| | - Hendrik Heinz
- Department of Chemical and Biological Engineering, University of Colorado- Boulder Boulder CO 80309 USA
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11
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Heo SJ, Kim KH, Han B, Chae HG, Lee SG. Defect structure evolution of polyacrylonitrile and single wall carbon nanotube nanocomposites: a molecular dynamics simulation approach. Sci Rep 2020; 10:11816. [PMID: 32678215 PMCID: PMC7366919 DOI: 10.1038/s41598-020-68812-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 05/11/2020] [Indexed: 12/03/2022] Open
Abstract
In this study, molecular dynamics simulations were performed to understand the defect structure development of polyacrylonitrile-single wall carbon nanotube (PAN-SWNT) nanocomposites. Three different models (control PAN, PAN-SWNT(5,5), and PAN-SWNT(10,10)) with a SWNT concentration of 5 wt% for the nanocomposites were tested to study under large extensional deformation to the strain of 100% to study the corresponding mechanical properties. Upon deformation, the higher stress was observed in both nanocomposite systems as compared to the control PAN, indicating effective reinforcement. The higher Young’s (4.76 ± 0.24 GPa) and bulk (4.19 ± 0.25 GPa) moduli were observed when the smaller-diameter SWNT(5,5) was used, suggesting that SWNT(5,5) resists stress better. The void structure formation was clearly observed in PAN-SWNT(10,10), while the nanocomposite with smaller diameter SWNT(5,5) did not show the development of such a defect structure. In addition, the voids at the end of SWNT(10,10) became larger in the drawing direction with increasing deformation.
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Affiliation(s)
- So Jeong Heo
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology, 50 Unist-gil, Ulsan, 44919, Republic of Korea.,Department of Organic Material Science and Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Kwang Ho Kim
- School of Materials Science and Engineering, Pusan National University, 2, Busandaehak-ro 63 Beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Byungchan Han
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Han Gi Chae
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology, 50 Unist-gil, Ulsan, 44919, Republic of Korea.
| | - Seung Geol Lee
- Department of Organic Material Science and Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea.
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12
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Gao Z, Zhu J, Rajabpour S, Joshi K, Kowalik M, Croom B, Schwab Y, Zhang L, Bumgardner C, Brown KR, Burden D, Klett JW, van Duin ACT, Zhigilei LV, Li X. Graphene reinforced carbon fibers. SCIENCE ADVANCES 2020; 6:eaaz4191. [PMID: 32494642 PMCID: PMC7182419 DOI: 10.1126/sciadv.aaz4191] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 02/06/2020] [Indexed: 05/28/2023]
Abstract
The superlative strength-to-weight ratio of carbon fibers (CFs) can substantially reduce vehicle weight and improve energy efficiency. However, most CFs are derived from costly polyacrylonitrile (PAN), which limits their widespread adoption in the automotive industry. Extensive efforts to produce CFs from low cost, alternative precursor materials have failed to yield a commercially viable product. Here, we revisit PAN to study its conversion chemistry and microstructure evolution, which might provide clues for the design of low-cost CFs. We demonstrate that a small amount of graphene can minimize porosity/defects and reinforce PAN-based CFs. Our experimental results show that 0.075 weight % graphene-reinforced PAN/graphene composite CFs exhibits 225% increase in strength and 184% enhancement in Young's modulus compared to PAN CFs. Atomistic ReaxFF and large-scale molecular dynamics simulations jointly elucidate the ability of graphene to modify the microstructure by promoting favorable edge chemistry and polymer chain alignment.
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Affiliation(s)
- Zan Gao
- Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904, USA
| | - Jiadeng Zhu
- Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904, USA
| | - Siavash Rajabpour
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Kaushik Joshi
- Department of Materials Science and Engineering, University of Virginia, 395 McCormick Road, Charlottesville, VA 22904-4745, USA
| | - Małgorzata Kowalik
- Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Brendan Croom
- Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904, USA
| | - Yosyp Schwab
- Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904, USA
| | - Liwen Zhang
- Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904, USA
| | - Clifton Bumgardner
- Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904, USA
| | - Kenneth R. Brown
- Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904, USA
| | - Diana Burden
- Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904, USA
| | | | - Adri C. T. van Duin
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Leonid V. Zhigilei
- Department of Materials Science and Engineering, University of Virginia, 395 McCormick Road, Charlottesville, VA 22904-4745, USA
| | - Xiaodong Li
- Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904, USA
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13
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Islam K, Saha S, Masud AKM. Molecular dynamics simulation of the mechanical properties of CNT-polyoxymethylene composite with a reactive forcefield. MOLECULAR SIMULATION 2020. [DOI: 10.1080/08927022.2020.1711904] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Khayrul Islam
- Department of Industrial and Production Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
| | - Sourav Saha
- Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
- Theoretical and Applied Mechanics Program, Northwestern University, Evanston, IL, USA
| | - A. K. M. Masud
- Department of Industrial and Production Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
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14
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Pan X, Shen L, Schenning APHJ, Bastiaansen CWM. Transparent, High-Thermal-Conductivity Ultradrawn Polyethylene/Graphene Nanocomposite Films. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1904348. [PMID: 31441142 DOI: 10.1002/adma.201904348] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Indexed: 05/22/2023]
Abstract
Transparent, ultradrawn, ultrahigh molecular weight polyethylene (UHMWPE)/graphene nanocomposite films with a high thermal conductivity are successfully fabricated by solution-casting and solid-state drawing. It is found that the low optical transmittance (<75%) of the ultradrawn UHMWPE/graphene composite films is drastically improved (>90%) by adding 2-(2H-benzontriazol-2-yl)-4,6-ditertpentylphenol (BZT) as a second additive. This high transmission is interpreted in terms of a reduced void content in the composite films and the improved dispersion of graphene both of which decrease light scattering. The high thermal conductivity is attributed to the π-π interaction between BZT and graphene. In addition, a high specific thermal conductivity of ≈75 W m-1 K-1 ρ-1 of the ultradrawn UHMWPE/graphene/BZT composite films is obtained, which is higher than most metals and polymer nanocomposite. These transparent films are potentially excellent candidates for thermal management in various applications due to a combination of low density, ease of processing, and high thermal conductivity.
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Affiliation(s)
- Xinglong Pan
- Stimuli-responsive Functional Materials and Devices (SFD), Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5600, MB, Eindhoven, The Netherlands
| | - Lihua Shen
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Albertus P H J Schenning
- Stimuli-responsive Functional Materials and Devices (SFD), Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5600, MB, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Den Dolech 2, 5600, MB, Eindhoven, The Netherlands
| | - Cees W M Bastiaansen
- Stimuli-responsive Functional Materials and Devices (SFD), Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5600, MB, Eindhoven, The Netherlands
- School of Engineering and Materials Science, Queen Mary, University of London, London, E1 4NS, UK
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15
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Cai F, You G, Zhao X, Hu H, Wu S. The Relationship between Specific Structure and Gas Permeability of Bromobutyl Rubber: A Combination of Experiments and Molecular Simulations. MACROMOL THEOR SIMUL 2019. [DOI: 10.1002/mats.201900025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Fei Cai
- State Key Laboratory of Organic‐Inorganic CompositesBeijing University of Chemical Technology Beijing 100029 P. R. China
| | - Guohua You
- College of Information Science and TechnologyBeijing University of Chemical Technology Beijing 100029 China
| | - Xiuying Zhao
- State Key Laboratory of Organic‐Inorganic CompositesBeijing University of Chemical Technology Beijing 100029 P. R. China
| | - Haihua Hu
- Petrochemical Research Institute PetroChina, Gan Su Lanzhou 730060 P. R. China
| | - Sizhu Wu
- State Key Laboratory of Organic‐Inorganic CompositesBeijing University of Chemical Technology Beijing 100029 P. R. China
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16
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Lei H, Qi S, Wu D. Hierarchical multiscale analysis of polyimide films by molecular dynamics simulation: Investigation of thermo-mechanical properties. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121645] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Wang P, Gulgunje P, Ghoshal S, Odeh IN, Verghese N, Kumar S. Effect of interfacial chemistry on crystallization of polypropylene/multiwall carbon nanotube nanocomposites. POLYM ENG SCI 2019. [DOI: 10.1002/pen.25155] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Po‐Hsiang Wang
- School of Materials Science and EngineeringGeorgia Institute of Technology Atlanta Georgia 30332
| | - Prabhakar Gulgunje
- School of Materials Science and EngineeringGeorgia Institute of Technology Atlanta Georgia 30332
| | - Sushanta Ghoshal
- School of Materials Science and EngineeringGeorgia Institute of Technology Atlanta Georgia 30332
| | | | | | - Satish Kumar
- School of Materials Science and EngineeringGeorgia Institute of Technology Atlanta Georgia 30332
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18
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Liu J, Li W, Cheng R, Wu Q, Zhao J, He D, Mu S. Stabilizing Pt Nanocrystals Encapsulated in N-Doped Carbon as Double-Active Sites for Catalyzing Oxygen Reduction Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2580-2586. [PMID: 30682889 DOI: 10.1021/acs.langmuir.8b03947] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Polypropylene fiber, a cheap source of nitrogen-doped carbon, is introduced to design robust nitrogen-doped carbon-encapsulated small Pt nanocrystals with Pt and nitrogen-carbon double-active centers toward oxygen reduction reaction (ORR). Ascribed to the separation effect of the polypropylene fiber, even suffering from a high-temperature carbonization treatment at 720 °C for 90 min, the polypropylene fiber-derived carbon-encapsulated Pt nanocrystal maintains a small particle size (3 nm diameter on average). As expected, its ORR mass activity is up to 116.5 mA/mg at 0.9 V. After 8000 cycles, the half-wave potential of the prepared catalyst declines only by 14 mV compared with 43 mV for the commercial Pt/C catalyst. The significantly improved electrochemical properties of the as-prepared catalyst are resulted from the nitrogen-doped carbon-encapsulated Pt nanocrystal structure, which is benefited to adsorption and activation of oxygen due to the presence of nitrogen-doped carbon as the important active site for ORR besides Pt metal. In addition, the migration, aggregation, and growth of Pt nanoparticles are prohibited in terms of the outer nitrogen-doped carbon protection layer, greatly enhancing the stability of the catalyst.
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19
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Li Z, Song Y, Li A, Xu W, Zhang W. Direct observation of the wrapping/unwrapping of ssDNA around/from a SWCNT at the single-molecule level: towards tuning the binding mode and strength. NANOSCALE 2018; 10:18586-18596. [PMID: 30259027 DOI: 10.1039/c8nr06150e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Complexation of single-stranded DNA (ssDNA) with a chiral single-walled carbon nanotube (SWCNT) exhibits surprising efficacy in CNT dispersion and sorting, optical sensing, and nanoelectronic device design. Studying the wrapping/unwrapping mechanism is challenging because an in situ method at the single-molecule level is required. Here, we developed a method based on single-molecule force spectroscopy to monitor the unwrapping/wrapping of ssDNA from/around a SWCNT. Our results reveal that the wrapping/unwrapping processes are reversible in water, and these processes occur in an equilibrium manner driven mainly by π-π interactions between DNA bases and CNTs. In phosphate buffered saline, the unwrapping process is loading rate-dependent, and ssDNA wrapping around a CNT undergoes two distinct stages dominated by both π-π interactions and hydrogen bonding. In addition, our results show that salts could further stabilize ssDNA/CNT complexes by blocking the electrostatic interactions between adjacent DNA segments and by catalyzing the formation of hydrogen bonds between DNA bases. The stability of ssDNA/CNT is dependent on the DNA sequence and CNT chirality. These results deepen our understanding of ssDNA-CNT interactions and provide effective means to tune the binding mode and strength.
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Affiliation(s)
- Zhandong Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
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20
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Randall JD, Eyckens DJ, Stojcevski F, Francis PS, Doeven EH, Barlow AJ, Barrow AS, Arnold CL, Moses JE, Henderson LC. Modification of Carbon Fibre Surfaces by Sulfur-Fluoride Exchange Click Chemistry. Chemphyschem 2018; 19:3176-3181. [PMID: 30253016 DOI: 10.1002/cphc.201800789] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Indexed: 01/28/2023]
Abstract
Technologies that enable surface modification are in high demand and are critical for the implementation of new functional materials and devices. Here, we describe the first modification of a carbon surface (in this case carbon fiber) using the sulfur-fluoride exchange (SuFEx) reaction. The parent sulfur (VI) fluoride moiety can be installed directly to the surface via electrochemical deposition of the fluorosulfate phenyldiazonium tetrafluoroborate salt, or by 'SuFExing' a phenol on the carbon surface followed by treatment of the material with SO2 F2 ; similar to a 'graft to' or 'graft from' functionalization approach. We demonstrate that these SuFEx-able surfaces readily undergo exchange with aryl silyl ethers, and that the subsequent sulfate linkages are themselves stable under electrochemical redox conditions. Finally, we showcase the utility of the SuFEx chemistry by installing a pendant amino group to the fiber surface resulting in interfacial shear strength improvements of up to 130 % in epoxy resin.
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Affiliation(s)
- James D Randall
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Daniel J Eyckens
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Filip Stojcevski
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Paul S Francis
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Egan H Doeven
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Anders J Barlow
- Centre for Materials and Surface Science and Department of Chemistry and Physics, School of Molecular Sciences, La Trobe University, Melbourne, Victoria, Australia, 3086
| | - Andrew S Barrow
- The Click Chemistry Research Laboratory, La Trobe Institute for Molecular Science, Bundoora, Melbourne, Victoria, Australia, 3083
| | - Chantelle L Arnold
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - John E Moses
- The Click Chemistry Research Laboratory, La Trobe Institute for Molecular Science, Bundoora, Melbourne, Victoria, Australia, 3083
| | - Luke C Henderson
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
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