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Applications of Spectroscopic Techniques for Characterization of Polymer Nanocomposite: A Review. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02461-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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2
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Comparative Study of Metal Substrates for Improved Carbonization of Electrospun PAN Nanofibers. Polymers (Basel) 2022; 14:polym14040721. [PMID: 35215634 PMCID: PMC8877959 DOI: 10.3390/polym14040721] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/07/2022] [Accepted: 02/11/2022] [Indexed: 02/06/2023] Open
Abstract
Carbon nanofibers are used for a broad range of applications, from nano-composites to energy storage devices. They are typically produced from electrospun poly(acrylonitrile) nanofibers by thermal stabilization and carbonization. The nanofiber mats are usually placed freely movable in an oven, which leads to relaxation of internal stress within the nanofibers, making them thicker and shorter. To preserve their pristine morphology they can be mechanically fixated, which may cause the nanofibers to break. In a previous study, we demonstrated that sandwiching the nanofiber mats between metal sheets retained their morphology during stabilization and incipient carbonization at 500 °C. Here, we present a comparative study of stainless steel, titanium, copper and silicon substrate sandwiches at carbonization temperatures of 500 °C, 800 °C and 1200 °C. Helium ion microscopy revealed that all metals mostly eliminated nanofiber deformation, whereas silicone achieved the best results in this regard. The highest temperatures for which the metals were shown to be applicable were 500 °C for silicon, 800 °C for stainless steel and copper, and 1200 °C for titanium. Fourier transform infrared and Raman spectroscopy revealed a higher degree of carbonization and increased crystallinity for higher temperatures, which was shown to depend on the substrate material.
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3
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Enhancing mechanical and interfacial properties of PEEK/epoxy/SWCNT composites employing aromatic hydroxyl and amine-functionalized SWCNTs. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Yang B, Gao L, Xue M, Wang H, Hou Y, Luo Y, Xiao H, Hu H, Cui C, Wang H, Zhang J, Li YF, Xie G, Tong X, Xie Y. Experimental and Simulation Research on the Preparation of Carbon Nano-Materials by Chemical Vapor Deposition. MATERIALS 2021; 14:ma14237356. [PMID: 34885507 PMCID: PMC8658281 DOI: 10.3390/ma14237356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 11/10/2021] [Accepted: 11/18/2021] [Indexed: 11/17/2022]
Abstract
Carbon nano-materials have been widely used in many fields due to their electron transport, mechanics, and gas adsorption properties. This paper introduces the structure and properties of carbon nano-materials the preparation of carbon nano-materials by chemical vapor deposition method (CVD)—which is one of the most common preparation methods—and reaction simulation. A major factor affecting the material structure is its preparation link. Different preparation methods or different conditions will have a great impact on the structure and properties of the material (mechanical properties, electrical properties, magnetism, etc.). The main influencing factors (precursor, substrate, and catalyst) of carbon nano-materials prepared by CVD are summarized. Through simulation, the reaction can be optimized and the growth mode of substances can be controlled. Currently, numerical simulations of the CVD process can be utilized in two ways: changing the CVD reactor structure and observing CVD chemical reactions. Therefore, the development and research status of computational fluid dynamics (CFD) for CVD are summarized, as is the potential of combining experimental studies and numerical simulations to achieve and optimize controllable carbon nano-materials growth.
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Affiliation(s)
- Bo Yang
- Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; (B.Y.); (Y.H.)
- School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550014, China
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Lanxing Gao
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Miaoxuan Xue
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Haihe Wang
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
- Guizhou Ecological and Environment Monitoring Center, Guiyang 550014, China
| | - Yanqing Hou
- Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; (B.Y.); (Y.H.)
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Yingchun Luo
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Han Xiao
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Hailiang Hu
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Can Cui
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Huanjiang Wang
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Jianhui Zhang
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
| | - Yu-Feng Li
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (Y.L.); (G.X.); (X.T.); (Y.X.)
| | - Gang Xie
- Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; (B.Y.); (Y.H.)
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
- State Key Laboratory of Common Associated Non-Ferrous Metal Resources Pressure Hydrometallurgy Technology, Kunming 650503, China
- Correspondence: (Y.L.); (G.X.); (X.T.); (Y.X.)
| | - Xin Tong
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550014, China
- Correspondence: (Y.L.); (G.X.); (X.T.); (Y.X.)
| | - Yadian Xie
- Key Laboratory of Low-Dimensional Materials and Big Data, School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China; (L.G.); (M.X.); (H.W.); (Y.L.); (H.X.); (H.H.); (C.C.); (H.W.); (J.Z.)
- Correspondence: (Y.L.); (G.X.); (X.T.); (Y.X.)
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5
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Metallic Supports Accelerate Carbonization and Improve Morphological Stability of Polyacrylonitrile Nanofibers during Heat Treatment. MATERIALS 2021; 14:ma14164686. [PMID: 34443208 PMCID: PMC8401406 DOI: 10.3390/ma14164686] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/13/2021] [Accepted: 08/17/2021] [Indexed: 02/06/2023]
Abstract
Electrospun poly(acrylonitrile) (PAN) nanofibers are typical precursors of carbon nanofibers. During stabilization and carbonization, however, the morphology of pristine PAN nanofibers is not retained if the as-spun nanofiber mats are treated without an external mechanical force, since internal stress tends to relax, causing the whole mats to shrink significantly, while the individual fibers thicken and curl. Stretching the nanofiber mats during thermal treatment, in contrast, can result in fractures due to inhomogeneous stress. Previous studies have shown that stabilization and carbonization of PAN nanofibers electrospun on an aluminum substrate are efficient methods to retain the fiber mat dimensions without macroscopic cracks during heat treatment. In this work, we studied different procedures of mechanical fixation via metallic substrates during thermal treatment. The influence of the metallic substrate material as well as different methods of double-sided covering of the fibers, i.e., sandwiching, were investigated. The results revealed that sandwich configurations with double-sided metallic supports not only facilitate optimal preservation of the original fiber morphology but also significantly accelerate the carbonization process. It was found that unlike regularly carbonized nanofibers, the metal supports allow complete deoxygenation at low treatment temperature and that the obtained carbon nanofibers exhibit increased crystallinity.
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Ferdousi S, Chen Q, Soltani M, Zhu J, Cao P, Choi W, Advincula R, Jiang Y. Characterize traction-separation relation and interfacial imperfections by data-driven machine learning models. Sci Rep 2021; 11:14330. [PMID: 34253831 PMCID: PMC8275573 DOI: 10.1038/s41598-021-93852-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 06/23/2021] [Indexed: 02/06/2023] Open
Abstract
Interfacial mechanical properties are important in composite materials and their applications, including vehicle structures, soft robotics, and aerospace. Determination of traction-separation (T-S) relations at interfaces in composites can lead to evaluations of structural reliability, mechanical robustness, and failures criteria. Accurate measurements on T-S relations remain challenging, since the interface interaction generally happens at microscale. With the emergence of machine learning (ML), data-driven model becomes an efficient method to predict the interfacial behaviors of composite materials and establish their mechanical models. Here, we combine ML, finite element analysis (FEA), and empirical experiments to develop data-driven models that characterize interfacial mechanical properties precisely. Specifically, eXtreme Gradient Boosting (XGBoost) multi-output regressions and classifier models are harnessed to investigate T-S relations and identify the imperfection locations at interface, respectively. The ML models are trained by macroscale force-displacement curves, which can be obtained from FEA and standard mechanical tests. The results show accurate predictions of T-S relations (R2 = 0.988) and identification of imperfection locations with 81% accuracy. Our models are experimentally validated by 3D printed double cantilever beam specimens from different materials. Furthermore, we provide a code package containing trained ML models, allowing other researchers to establish T-S relations for different material interfaces.
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Affiliation(s)
- Sanjida Ferdousi
- grid.266869.50000 0001 1008 957XDepartment of Mechanical Engineering, University of North Texas, Denton, TX 76207 USA
| | - Qiyi Chen
- grid.135519.a0000 0004 0446 2659Center for Nanophase Materials and Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37830 USA
| | - Mehrzad Soltani
- grid.266869.50000 0001 1008 957XDepartment of Mechanical Engineering, University of North Texas, Denton, TX 76207 USA
| | - Jiadeng Zhu
- grid.135519.a0000 0004 0446 2659Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
| | - Pengfei Cao
- grid.135519.a0000 0004 0446 2659Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
| | - Wonbong Choi
- grid.266869.50000 0001 1008 957XDepartment of Mechanical Engineering, University of North Texas, Denton, TX 76207 USA ,grid.266869.50000 0001 1008 957XDepartment of Materials Science and Engineering, University of North Texas, Denton, TX 76207 USA
| | - Rigoberto Advincula
- grid.135519.a0000 0004 0446 2659Center for Nanophase Materials and Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37830 USA ,grid.411461.70000 0001 2315 1184Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996 USA
| | - Yijie Jiang
- grid.266869.50000 0001 1008 957XDepartment of Mechanical Engineering, University of North Texas, Denton, TX 76207 USA
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7
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Stabilization and Incipient Carbonization of Electrospun Polyacrylonitrile Nanofibers Fixated on Aluminum Substrates. FIBERS 2020. [DOI: 10.3390/fib8090055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Polyacrylonitrile (PAN) nanofibers, prepared by electrospinning, are often used as a precursor for carbon nanofibers. The thermal carbonization process necessitates a preceding oxidative stabilization, which is usually performed thermally, i.e., by carefully heating the electrospun nanofibers in an oven. One of the typical problems occurring during this process is a strong deformation of the fiber morphologies—the fibers become thicker and shorter, and show partly undesired conglutinations. This problem can be solved by stretching the nanofiber mat during thermal treatment, which, on the other hand, can lead to breakage of the nanofiber mat. In a previous study, we have shown that the electrospinning of PAN on aluminum foils and the subsequent stabilization of this substrate is a simple method for retaining the fiber morphology without breaking the nanofiber mat. Here, we report on the impact of different aluminum foils on the physical and chemical properties of stabilized PAN nanofibers mats, and on the following incipient carbonization process at a temperature of max. 600 °C, i.e., below the melting temperature of aluminum.
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Ahmed KS, Ibrahim I, Keng AK. Advanced nanoindentation simulations for carbon nanotube reinforced nanocomposites. Heliyon 2020; 6:e04575. [PMID: 32775747 PMCID: PMC7404541 DOI: 10.1016/j.heliyon.2020.e04575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/19/2020] [Accepted: 07/24/2020] [Indexed: 10/31/2022] Open
Abstract
Mechanical properties of Carbon Nanotube (CNT) reinforced composites are obtained utilizing finite element (FE) method-based indentation simulations considering large strain elasto-plastic behavior of elements. This study includes nanoindentation simulations for chemically non-bonded CNT/matrix interface, including the length scale effect of nanocomposites. In order to investigate the mechanical properties of CNT reinforced nanocomposites, a number of FE models for nanoindentation tests have been simulated. Sample nanocomposites are examined to determine the suitable types of CNTs and their effectiveness as a reinforcement of different potential matrices. The Parametric study is conducted to obtain the influence of wall thickness, relative positioning, and volume fraction of CNT and strain hardening parameter of matrix on the mechanical properties of nanocomposites. The obtained results indicate that, properties such as modulus of elasticity and hardness of the nanocomposites are largely dependent on wall thickness of CNT and strain hardening parameter of the matrix. This study also suggests, the minimum wall thickness of CNT to avoid local buckling in nanocomposite which is required to be at least 0.2 nm for a diameter to thickness ratio of 5.0. Moreover, a matrix having a value of strain hardening parameter near 0.1 is expected to be significantly effective for nanocomposite.
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Affiliation(s)
- Khondaker Sakil Ahmed
- Department of Civil Engineering, Military Institute of Science and Technology, Dhaka, 1216, Bangladesh
| | - Ibriju Ibrahim
- Department of Civil Engineering, Military Institute of Science and Technology, Dhaka, 1216, Bangladesh
| | - Ang Kok Keng
- Department of Civil and Environmental Engineering, National University of Singapore, 1, Engineering Drive 2, 117576, Singapore
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9
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Abstract
Electrospinning can be used to produce nanofiber mats. One of the often used polymers for electrospinning is polyacrylonitrile (PAN), especially for the production of carbon nanofibers, but also for a diverse number of other applications. For some of these applications—e.g., creation of nano-filters—the dimensional stability of the nanofiber mats is crucial. While relaxation processes—especially dry, wet and washing relaxation—are well-known and often investigated for knitted fabrics, the dimensional stability of nanofiber mats has not yet been investigated. Here we report on the wet relaxation of PAN nanofiber mats, which are dependent on spinning and solution parameters such as: voltage, electrode distance, nanofiber mat thickness, and solid content in the solution. Our results show that wet relaxation has a significant effect on the samples, resulting in a dimensional change that has to be taken into account for nanofiber mats in wet applications. While the first and second soaking in pure water resulted in an increase of the nanofiber mat area up to approximately 5%, the dried sample, after the second soaking, conversely showed an area reduced by a maximum of 5%. For soaking in soap water, small areal decreases between approximately 1–4% were measured.
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Juhász Junger I, Wehlage D, Böttjer R, Grothe T, Juhász L, Grassmann C, Blachowicz T, Ehrmann A. Dye-Sensitized Solar Cells with Electrospun Nanofiber Mat-Based Counter Electrodes. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1604. [PMID: 30181451 PMCID: PMC6163651 DOI: 10.3390/ma11091604] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/29/2018] [Accepted: 09/02/2018] [Indexed: 11/22/2022]
Abstract
Textile-based dye-sensitized solar cells (DSSCs) can be created by building the necessary layers on a textile fabric or around fibers which are afterwards used to prepare a textile layer, typically by weaving. Another approach is using electrospun nanofiber mats as one or more layers. In this work, electrospun polyacrylonitrile (PAN) nanofiber mats coated by a conductive polymer poly(3,4-ethylenedioxythiopene) polystyrene sulfonate (PEDOT:PSS) were used to produce the counter electrodes for half-textile DSSCs. The obtained efficiencies were comparable with the efficiencies of pure glass-based DSSCs and significantly higher than the efficiencies of DSSCs with cotton based counter electrodes. The efficiency could be further increased by increasing the number of PEDOT:PSS layers on the counter electrode. Additionally, the effect of the post treatment of the conductive layers by HCl, acetic acid, or dimethyl sulfoxide (DMSO) on the DSSC efficiencies was investigated. Only the treatment by HCl resulted in a slight improvement of the energy-conversion efficiency.
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Affiliation(s)
- Irén Juhász Junger
- Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany.
| | - Daria Wehlage
- Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany.
| | - Robin Böttjer
- Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany.
| | - Timo Grothe
- Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany.
| | - László Juhász
- Faculty of Electrical Engineering, Media Technology and Computer Science, Deggendorf Institute of Technology, 94469 Deggendorf, Germany.
| | - Carsten Grassmann
- Faculty of Textile and Clothing Technology, Niederrhein University of Applied Sciences, 41065 Mönchengladbach, Germany.
| | - Tomasz Blachowicz
- Institute of Physics-Center for Science and Education, Silesian University of Technology, 44-100 Gliwice, Poland.
| | - Andrea Ehrmann
- Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany.
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Fixing PAN Nanofiber Mats during Stabilization for Carbonization and Creating Novel Metal/Carbon Composites. Polymers (Basel) 2018; 10:polym10070735. [PMID: 30960660 PMCID: PMC6403840 DOI: 10.3390/polym10070735] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 06/15/2018] [Accepted: 07/01/2018] [Indexed: 11/16/2022] Open
Abstract
Polyacrylonitrile (PAN) is one of the materials most often used for carbonization. PAN nanofiber mats, created by electrospinning, are an especially interesting source to gain carbon nanofibers. A well-known problem in this process is fixing the PAN nanofiber mats during the stabilization process which is necessary to avoid contraction of the fibers, correlated with an undesired increase in the diameter and undesired bending. Fixing this issue typically results in breaks in the nanofiber mats if the tension is too high, or it is not strong enough to keep the fibers as straight as in the original state. This article suggests a novel method to overcome this problem by electrospinning on an aluminum substrate on which the nanofiber mat adheres rigidly, stabilizing the composite and carbonizing afterwards either with or without the aluminum substrate to gain either a pure carbon nanofiber mat or a metal/carbon composite.
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12
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Chen J, Liu B, Gao X, Xu D. A review of the interfacial characteristics of polymer nanocomposites containing carbon nanotubes. RSC Adv 2018; 8:28048-28085. [PMID: 35542749 PMCID: PMC9083916 DOI: 10.1039/c8ra04205e] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 07/26/2018] [Indexed: 12/17/2022] Open
Abstract
This paper provides an overview of recent advances in research on the interfacial characteristics of carbon nanotube–polymer nanocomposites. The state of knowledge about the chemical functionalization of carbon nanotubes as well as the interaction at the interface between the carbon nanotube and the polymer matrix is presented. The primary focus of this paper is on identifying the fundamental relationship between nanocomposite properties and interfacial characteristics. The progress, remaining challenges, and future directions of research are discussed. The latest developments of both microscopy and scattering techniques are reviewed, and their respective strengths and limitations are briefly discussed. The main methods available for the chemical functionalization of carbon nanotubes are summarized, and particular interest is given to evaluation of their advantages and disadvantages. The critical issues related to the interaction at the interface are discussed, and the important techniques for improving the properties of carbon nanotube–polymer nanocomposites are introduced. Additionally, the mechanism responsible for the interfacial interaction at the molecular level is briefly described. Furthermore, the mechanical, electrical, and thermal properties of the nanocomposites are discussed separately, and their influencing factors are briefly introduced. Finally, the current challenges and opportunities for efficiently translating the remarkable properties of carbon nanotubes to polymer matrices are summarized in the hopes of facilitating the development of this emerging area. Potential topics of oncoming focus are highlighted, and several suggestions concerning future research needs are also presented. The state of research on the characteristics at the interface in polymer nanocomposites is reviewed. Special emphasis is placed on the recent advances in the fundamental relationship between interfacial characteristics and nanocomposite properties.![]()
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Affiliation(s)
- Junjie Chen
- Department of Energy and Power Engineering
- School of Mechanical and Power Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Baofang Liu
- Department of Energy and Power Engineering
- School of Mechanical and Power Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Xuhui Gao
- Department of Energy and Power Engineering
- School of Mechanical and Power Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Deguang Xu
- Department of Energy and Power Engineering
- School of Mechanical and Power Engineering
- Henan Polytechnic University
- Jiaozuo
- China
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Jose J, Varkey T B, Swaminathan N. Insights into traction-separation phenomena of graphene-cis-1,4-polyisoprene interface using molecular dynamics. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.06.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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14
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Electromechanical properties of multi-walled carbon nanotube/gelatin hydrogel composites: Effects of aspect ratios, electric field, and temperature. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 46:281-9. [DOI: 10.1016/j.msec.2014.10.068] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 09/15/2014] [Accepted: 10/23/2014] [Indexed: 11/20/2022]
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15
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Khare KS, Khabaz F, Khare R. Effect of carbon nanotube functionalization on mechanical and thermal properties of cross-linked epoxy-carbon nanotube nanocomposites: role of strengthening the interfacial interactions. ACS APPLIED MATERIALS & INTERFACES 2014; 6:6098-6110. [PMID: 24606164 DOI: 10.1021/am405317x] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We have used amido-amine functionalized carbon nanotubes (CNTs) that form covalent bonds with cross-linked epoxy matrices to elucidate the role of the matrix-filler interphase in the enhancement of mechanical and thermal properties in these nanocomposites. For the base case of nanocomposites of cross-linked epoxy and pristine single-walled CNTs, our previous work (Khare, K. S.; Khare, R. J. Phys. Chem. B 2013, 117, 7444-7454) has shown that weak matrix-filler interactions cause the interphase region in the nanocomposite to be more compressible. Furthermore, because of the weak matrix-filler interactions, the nanocomposite containing dispersed pristine CNTs has a glass transition temperature (Tg) that is ∼66 K lower than the neat polymer. In this work, we demonstrate that in spite of the presence of stiff CNTs in the nanocomposite, the Young's modulus of the nanocomposite containing dispersed pristine CNTs is virtually unchanged compared to the neat cross-linked epoxy. This observation suggests that the compressibility of the matrix-filler interphase interferes with the ability of the CNTs to reinforce the matrix. Furthermore, when the compressibility of the interphase is reduced by the use of amido-amine functionalized CNTs, the mechanical reinforcement due to the filler is more effective, resulting in a ∼50% increase in the Young's modulus compared to the neat cross-linked epoxy. Correspondingly, the functionalization of the CNTs also led to a recovery in the Tg making it effectively the same as the neat polymer and also resulted in a ∼12% increase in the thermal conductivity of the nanocomposite containing functionalized CNTs compared to that containing pristine CNTs. These results demonstrate that the functionalization of the CNTs facilitates the transfer of both mechanical load and thermal energy across the matrix-filler interface.
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Affiliation(s)
- Ketan S Khare
- Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409-3121, United States
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Chen X, Zheng M, Park C, Ke C. Direct measurements of the mechanical strength of carbon nanotube-poly(methyl methacrylate) interfaces. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:3345-3351. [PMID: 23606544 DOI: 10.1002/smll.201202771] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Indexed: 06/02/2023]
Abstract
Understanding the interfacial stress transfer between carbon nanotubes (CNTs) and polymer matrices is of great importance to the development of CNT-reinforced polymer nanocomposites. In this paper, an experimental study is presented of the interfacial strength between individual double-walled CNTs and poly(methyl methacrylate) (PMMA) using an in situ nanomechanical single-tube pull-out testing scheme inside a high-resolution electron microscope. By pulling out individual tubes with different embedded lengths, this work reveals the shear lag effect on the nanotube-polymer interface and demonstrates that the effective interfacial load transfer occurs only within a certain embedded length. These results show that the CNT-PMMA interface possesses an interfacial fracture energy within 0.054-0.80 J/m(2) and a maximum interfacial strength within 85-372 MPa. This work is useful to better understand the local stress transfer on nanotube-polymer interfaces.
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Affiliation(s)
- Xiaoming Chen
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, NY, 13902, USA
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Wu M, Wang Q, Li K, Wu Y, Liu H. Optimization of stabilization conditions for electrospun polyacrylonitrile nanofibers. Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.05.001] [Citation(s) in RCA: 147] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ganesan Y, Peng C, Lu Y, Loya PE, Moloney P, Barrera E, Yakobson BI, Tour JM, Ballarini R, Lou J. Interface toughness of carbon nanotube reinforced epoxy composites. ACS APPLIED MATERIALS & INTERFACES 2011; 3:129-134. [PMID: 21214196 DOI: 10.1021/am1011047] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Traditional single-fiber pull-out type experiments were conducted on individual multiwalled carbon nanotubes (MWNT) embedded in an epoxy matrix using a novel technique. Remarkably, the results are qualitatively consistent with the predictions of continuum fracture mechanics models. Unstable interface crack propagation occurred at short MWNT embedments, which essentially exhibited a linear load-displacement response prior to peak load. Deep embedments, however, enabled stable crack extension and produced a nonlinear load-displacement response prior to peak load. The maximum pull-out forces corresponding to a wide range of embedments were used to compute the nominal interfacial shear strength and the interfacial fracture energy of the pristine MWNT-epoxy interface.
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Mehdipour H, Ostrikov K, Rider AE. Low- and high-temperature controls in carbon nanofiber growth in reactive plasmas. NANOTECHNOLOGY 2010; 21:455605. [PMID: 20947941 DOI: 10.1088/0957-4484/21/45/455605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A numerical growth model is used to describe the catalyzed growth of carbon nanofibers in the sheath of a low-temperature plasma. Using the model, the effects of variation in the plasma sheath parameters and substrate potential on the carbon nanofiber growth characteristics, such as the growth rate, the effective carbon flux to the catalyst surface, and surface coverages, have been investigated. It is shown that variations in the parameters, which change the sheath width, mainly affect the growth parameters at the low catalyst temperatures, whereas the other parameters such as the gas pressure, ion temperature, and percentages of the hydrocarbon and etching gases, strongly affect the carbon nanofiber growth at higher temperatures. The conditions under which the carbon nanofiber growth can still proceed under low nanodevice-friendly process temperatures have been formulated and summarized. These results are consistent with the available experimental results and can also be used for catalyzed growth of other high-aspect-ratio nanostructures in low-temperature plasmas.
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Affiliation(s)
- H Mehdipour
- Physics Department, Faculty of Science, Sahand University of Technology, Tabriz, Iran
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Sustainable Nanotechnology: Through Green Methods and Life-Cycle Thinking. SUSTAINABILITY 2010. [DOI: 10.3390/su2103323] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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