1
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Nabipour H, Wang X, Kandola B, Song L, Kan Y, Chen J, Hu Y. A bio-based intrinsically flame-retardant epoxy vitrimer from furan derivatives and its application in recyclable carbon fiber composites. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.110206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2
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Nguyen Thi TB, Ata S, Morimoto T, Kato Y, Horibe M, Yamada T, Okazaki T, Hata K. Annealing-induced enhancement of electrical conductivity and electromagnetic interference shielding in injection-molded CNT polymer composites. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Vegetable Oil-Based Resins Reinforced with Spruce Bark Powder and with Its Hydrochar Lignocellulosic Biomass. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112210649] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A bio-based polymeric matrix was developed by the copolymerization of a vegetable oil-based epoxy, epoxidized linseed oil (ELO), with dodecenyl succinic anhydride (DDSA). To obtain eco-friendly bio-composites, this matrix was combined with a natural filler: spruce bark powder (SB) with its hydrochar (HC) in various proportions ranged from 1 to 30 wt.%. The reactivities of these formulations were studied by DSC analysis that highlighted that both fillers have a high catalytic effect on the ELO–DDSA crosslinking reaction. The complementary studies by TGA, DMA, tensile tests, water absorption and Shore tests had shown that both HC and SB bring improvements to the mechanical properties of the composites, fulfilling multiple roles: (i) Both act as co-reactants in the copolymerization mechanism; (ii) HC acts as reinforcement, consolidating the network and providing stiffness and rigidity; and (iii) SB acts as plasticizer for reducing the brittle character of the epoxy resins.
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4
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Pandey RR, Chusuei CC. Carbon Nanotubes, Graphene, and Carbon Dots as Electrochemical Biosensing Composites. Molecules 2021; 26:6674. [PMID: 34771082 PMCID: PMC8587008 DOI: 10.3390/molecules26216674] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 10/27/2021] [Accepted: 10/28/2021] [Indexed: 12/20/2022] Open
Abstract
Carbon nanomaterials (CNMs) have been extensively used as electrochemical sensing composites due to their interesting chemical, electronic, and mechanical properties giving rise to increased performance. Due to these materials' unknown long-term ecological fate, care must be given to make their use tractable. In this review, the design and use of carbon nanotubes (CNTs), graphene, and carbon dots (CDs) as electrochemical sensing electrocatalysts applied to the working electrode surface are surveyed for various biosensing applications. Graphene and CDs are readily biodegradable as compared to CNTs. Design elements for CNTs that carry over to graphene and CDs include Coulombic attraction of components and using O or N atoms that serve as tethering points for attaching electrocatalytically active nanoparticles (NPs) and/or other additives.
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Affiliation(s)
| | - Charles C. Chusuei
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, TN 37132, USA;
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5
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Tabarsa M, ZareNezhad B. Humid air plasma-assisted surface treatment as a green functionalization technique to enhance the multi-walled carbon nanotubes dispersion and stability in aqueous solutions. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1964989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Masoud Tabarsa
- Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran
| | - Bahman ZareNezhad
- Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran
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6
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Abdel-Ghafar HM, Song X, Jiang H. Enhanced solar-driven evaporation process via f-MWCNTs/PVDF photothermal membrane for forward osmosis draw solution recovery. NANOTECHNOLOGY 2021; 32:375703. [PMID: 34087808 DOI: 10.1088/1361-6528/ac084b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 06/04/2021] [Indexed: 06/12/2023]
Abstract
Product water recovery and draw solution (DS) reuse is the most energy-intensive stage in forward osmosis (FO) technology. Sucrose solution is the most suitable DS for FO application in food and beverages. However, sucrose DS recovery by conventional pressure-driven or thermal-driven concentration techniques consumes high energy. Herein, we developed a spontaneous and sustainable solar-driven evaporation process based on a photothermal membrane for the concentration and recovery of sucrose solution. The photothermal membrane composed of multi-walled carbon nanotubes (f-MWCNTs) phtotothermal layer on a hydrophilic polyvinylidene fluoride (PVDF) substrate. The f-MWCNTs photothermal layer with rough surface and interconnected network structures not only improves the light harvesting and light-to-heat conversion performance, but also facilitates the transport of water molecules. The hydrophilic PVDF substrate can promote the rapid transport of water for adequate water supply to photothermal layer. As a result, the optimized f-MWCNTs/PVDF photothermal membrane exhibits an excellent light absorption of 95%, and a high surface temperature of 74 °C at 1 kW m-2. Besides, it realizes an evaporation rate of 1.17 kg m-2h-1for 5% (w/v) of sucrose solution, which is about 5 times higher than that of the natural evaporation. The designed photothermal evaporation process is capable of concentrating sucrose solution efficiently from 5% to 75% (w/v), which has great potential in FO process and juice concentration.
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Affiliation(s)
- Hamdy Maamoun Abdel-Ghafar
- Central Metallurgical Research and Development Institute (CMRDI), PO Box 87 Helwan, Cairo 11421, Egypt
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, People's Republic of China
| | - Xiangju Song
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, People's Republic of China
| | - Heqing Jiang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, People's Republic of China
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7
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Bejenari I, Dinu R, Montes S, Volf I, Mija A. Hydrothermal Carbon as Reactive Fillers to Produce Sustainable Biocomposites with Aromatic Bio-Based Epoxy Resins. Polymers (Basel) 2021; 13:polym13020240. [PMID: 33445728 PMCID: PMC7828177 DOI: 10.3390/polym13020240] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/04/2021] [Accepted: 01/07/2021] [Indexed: 11/25/2022] Open
Abstract
Thiswork is focused on the development of sustainable biocomposites based on epoxy bioresin reinforced with a natural porous material (hydrochar, HC) that is the product of spruce bark wastes subjected to hydrothermal decomposition. To identify the influence of hydrochar as a reinforcing material on the designed composites, seven formulations were prepared and tested. An aromatic epoxy monomer derived from wood biomass was used to generate the polymeric matrix, and the formulations were prepared varying the filler concentration from 0 to 30 wt %. The reactivity of these formulations, together with the structural, thermal, and mechanical properties of bio-based resin and biocomposites, are investigated. Surprisingly, the reactivity study performed by differential scanning calorimetry (DSC) revealed that HC has a strong impact on polymerization, leading to an important increase in reaction enthalpy and to a decrease of temperature range. The Fourier Transform Infrared Spectroscopy (FT-IR) investigations confirmed the chemical bonding between the resin and the HC, while the dynamic mechanical analysis (DMA) showed increased values of crosslink density and of storage moduli in the biocomposites products compared to the neat bioresin. Thermogravimetric analysis (TGA) points out that the addition of hydrochar led to an improvement of the thermal stability of the biocomposites compared with the neat resorcinol diglycidyl ether (RDGE)-based resin (T5% = 337 °C) by ≈2–7 °C. Significantly, the biocomposites with 15–20 wt % hydrochar showed a higher stiffness value compared to neat epoxy resin, 92SD vs. 82SD, respectively.
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Affiliation(s)
- Iuliana Bejenari
- Institute of Chemistry of Nice, University Côte d’Azur, UMR CNRS 7272, 06108 Nice, France; (I.B.); (R.D.)
- Faculty of Chemical Engineering and Environmental Protection, Gheorghe Asachi Technical University of Iasi, 73 Prof. D. Mangeron Street, 700050 Iasi, Romania;
| | - Roxana Dinu
- Institute of Chemistry of Nice, University Côte d’Azur, UMR CNRS 7272, 06108 Nice, France; (I.B.); (R.D.)
| | - Sarah Montes
- CIDETEC, Basque Research and Technology Alliance (BRTA), Po. Miramón 196, 20014 Donostia-San Sebastián, Spain;
| | - Irina Volf
- Faculty of Chemical Engineering and Environmental Protection, Gheorghe Asachi Technical University of Iasi, 73 Prof. D. Mangeron Street, 700050 Iasi, Romania;
| | - Alice Mija
- Institute of Chemistry of Nice, University Côte d’Azur, UMR CNRS 7272, 06108 Nice, France; (I.B.); (R.D.)
- Correspondence:
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8
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Functionalization of carbon nanotubes by combination of controlled radical polymerization and "grafting to" method. Adv Colloid Interface Sci 2020; 278:102126. [PMID: 32114292 DOI: 10.1016/j.cis.2020.102126] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/13/2020] [Accepted: 02/21/2020] [Indexed: 12/25/2022]
Abstract
This paper reviews the recent advances in non-covalent and covalent tethering of small molecules and polymer chains onto carbon nanotube (CNT) and its derivatives. The functionalized CNT has recently attracted great attention because of an increasing number of its potential applications. In non-covalent functionalization of CNT, the sp2-hybridized network plays a crucial role. The non-covalent grafting of small molecules and polymers can mainly be carried out through hydrogen bonding and π-stacking interactions. In covalent functionalization of CNT, condensation, cycloaddition, and addition reactions play a key role. Polymer modification has been reported by using three main methods of "grafting from", "grafting through", and also "grafting to". The "grafting from" and "grafting through" rely on propagation of polymer chains in the presence of CNT modified with initiator and double bond moieties, respectively. In "grafting to" method, which is the main aim of this review, the pre-fabricated polymer chains are mainly grafted onto the surface using coupling reactions. The coupling reactions are used for grafting pre-fabricated polymer chains and also small molecules onto CNT. Recent studies on grafting polymer chains onto CNT via "grafting to" method have focused on the pre-fabricated polymer chains by conventional and controlled radical polymerization (CRP) methods. CRP includes reversible activation, atom transfer, degenerative (exchange) chain transfer, and reversible chain transfer mechanisms, and could result in polymer-grafted CNT with narrow polydispersity index of the grafted polymer chains. Based on the mentioned mechanisms, nitroxide-mediated polymerization, atom transfer radical polymerization, and reversible addition-fragmentation chain transfer are known as the three commonly used CRP methods. Such polymer-modified CNT has lots of applications in batteries, biomedical fields, sensors, filtration, solar cells, etc.
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9
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Basheer BV, George JJ, Siengchin S, Parameswaranpillai J. Polymer grafted carbon nanotubes—Synthesis, properties, and applications: A review. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.nanoso.2020.100429] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Tiwari M, Billing BK, Bedi HS, Agnihotri PK. Quantification of carbon nanotube dispersion and its correlation with mechanical and thermal properties of epoxy nanocomposites. J Appl Polym Sci 2019. [DOI: 10.1002/app.48879] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mayank Tiwari
- Department of Mechanical EngineeringIndian Institute of Technology Ropar Rupnagar Punjab 140001 India
| | - Beant K. Billing
- Department of Mechanical EngineeringIndian Institute of Technology Ropar Rupnagar Punjab 140001 India
| | - Harpreet S. Bedi
- Department of Mechanical EngineeringIndian Institute of Technology Ropar Rupnagar Punjab 140001 India
| | - Prabhat K. Agnihotri
- Department of Mechanical EngineeringIndian Institute of Technology Ropar Rupnagar Punjab 140001 India
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11
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Pang X, Chen M, Fu J, Lin Z, Li Y, Wu J, Yan J, Chen X, Ge J. Eugenol Polysiloxane-Polycarbonate/Graphene Nanocomposite: Enhanced in Thermostability and Barrier Property. NANOMATERIALS 2019; 9:nano9121747. [PMID: 31818009 PMCID: PMC6955688 DOI: 10.3390/nano9121747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 12/05/2019] [Accepted: 12/06/2019] [Indexed: 12/02/2022]
Abstract
Graphene (GR) was used to blend with eugenol polysiloxane-polycarbonate (Si-PC) copolymer to prepare a Si-PC/GR nanocomposite via a solution blending method and the impact of graphene on the properties of Si-PC/GR nanocomposite was investigated. The morphology and structure of the Si-PC/GR nanocomposite were characterized. Combining morphology and property analysis, the result showed that when the graphene dispersed uniformly in the Si-PC matrix, the mechanical properties, thermostability and barrier property of Si-PC/GR nanocomposite were enhanced. Compared with Si-PC copolymer, the pyrolytic temperature of Si-PC/2.5%GR nanocomposite at 5% weight loss was 434.3 °C, which was 20.6 °C higher than Si-PC copolymer; and the oxygen barrier value of Si-PC/1.5%GR nanocomposite decreased to 160.2 cm3/m2 24 h 0.1 MPa, which was 53.2 less than pure Si-PC. The mechanical properties of Si-PC/GR nanocomposite were enhanced with an appropriate additive amount of graphene. The hydrophobicity also had been enhanced at the meantime.
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12
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Chen S, Chen L, Wang Y, Wang C, Miao M, Zhang D. Load transfer of thiol-ended hyperbranched polymers to improve simultaneously strength and longation of CNTs/epoxy nanocomposites. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109254] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Irzhak VI, Dzhardimalieva GI, Uflyand IE. Structure and properties of epoxy polymer nanocomposites reinforced with carbon nanotubes. JOURNAL OF POLYMER RESEARCH 2019. [DOI: 10.1007/s10965-019-1896-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Krishnamurthy A, Tao R, Senses E, Doshi SM, Burni FA, Natarajan B, Hunston D, Thostenson ET, Faraone A, Forster AL, Forster AM. Multiscale Polymer Dynamics in Hierarchical Carbon Nanotube Grafted Glass Fiber Reinforced Composites. ACS APPLIED POLYMER MATERIALS 2019; 1:10.1021/acsapm.9b00464. [PMID: 32166225 PMCID: PMC7067277 DOI: 10.1021/acsapm.9b00464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Carbon nanotube (CNT) grafted glass fiber reinforced epoxy nanocomposites (GFRP) present a range of stiffnesses (MPa to GPa) and length scales (μm to nm) at the fiber-matrix interface. The contribution of functionalized CNT networks to the local and bulk polymer dynamics is studied here by using a combination of torsion dynamical mechanical thermal analysis (DMTA), positron annihilation lifetime spectroscopy (PALS), and neutron scattering (NS) measurements. DMTA measurements highlight a reduction in the storage modulus (G') in the rubbery region and an asymmetric broadening of the loss modulus (G″) peak in the α-transition region. NS measurements show a suppressed hydrogen mean-square displacement (MSD) in the presence of glass fibers but a higher hydrogen MSD after grafting functionalized CNTs onto fiber surfaces. PALS measurements show greater free volume characteristics in the presence of the functionalized CNT modified composites, supporting the view that these interface layers increase polymer mobility. While NS and DMTA are sensitive to different modes of chain dynamics, the localization of functionalized nanotubes at the fiber interface is found to affect the distribution of polymer relaxation modes without significantly altering the thermally activated relaxation processes.
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Affiliation(s)
- Ajay Krishnamurthy
- Theiss Research, La Jolla, California 92037, United States
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Ran Tao
- Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Erkan Senses
- Department of Chemical and Biological Engineering, Koç University, Istanbul 34450, Turkey
| | - Sagar M. Doshi
- Center for Composite Materials and Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Faraz Ahmed Burni
- Department of Chemical Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Bharath Natarajan
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Department of Physics, Georgetown University, Washington, D.C. 20057, United States
- ExxonMobil Research and Engineering Company, Annandale, New Jersey 08801, United States
| | - Donald Hunston
- Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Erik T. Thostenson
- Center for Composite Materials and Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Antonio Faraone
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Amanda L. Forster
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Aaron M. Forster
- Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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15
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Han X, Wang T, Owuor PS, Hwang SH, Wang C, Sha J, Shen L, Yoon J, Wang W, Salvatierra RV, Ajayan PM, Shahsavari R, Lou J, Zhao Y, Tour JM. Ultra-Stiff Graphene Foams as Three-Dimensional Conductive Fillers for Epoxy Resin. ACS NANO 2018; 12:11219-11228. [PMID: 30408411 DOI: 10.1021/acsnano.8b05822] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Conductive epoxy composites are of great interest due to their applications in electronics. They are usually made by mixing powdered conductive fillers with epoxy. However, the conductivity of the composite is limited by the low filler content because increasing filler content causes processing difficulties and reduces the mechanical properties of the epoxy host. We describe here the use of ultra-stiff graphene foams (uGFs) as three-dimensional (3D) continuous conductive fillers for epoxy resins. The powder metallurgy method was used to produce the dense uGFs monoliths that resulted in a very high filler content of 32 wt % in the uGF-epoxy composite, while the density of epoxy was only increased by 0.09 g/cm3. The composite had an electrical conductivity of 41.0 ± 6.3 S/cm, which is among the highest of all of the polymer-based composites with non-conductive polymer matrices and comparable with the conductive polymer matrices reported to date. The compressive modulus of the composite showed a remarkable improvement of >1700% compared to pure epoxy. We have demonstrated that the 3D uGF filler substantially improves the conductivity and reinforces the polymer matrix with a high filler content while retaining a density similar to that of the epoxy alone.
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Affiliation(s)
- Xiao Han
- School of Materials Science and Engineering , Beihang University , Beijing 100191 , China
| | | | | | | | - Chao Wang
- Center for Composite Materials and Structures , Harbin Institute of Technology , Harbin 150080 , China
| | - Junwei Sha
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , China
| | | | | | | | | | | | | | | | - Yan Zhao
- School of Materials Science and Engineering , Beihang University , Beijing 100191 , China
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16
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Beneš H, Popelková D, Šturcová A, Popelka Š, Jůza J, Pop-Georgievski O, Konefał M, Hrubý M. Aqueous-Based Functionalizations of Titanate Nanotubes: A Straightforward Route to High-Performance Epoxy Composites with Interfacially Bonded Nanofillers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Hynek Beneš
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Daniela Popelková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Adriana Šturcová
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Štěpán Popelka
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Josef Jůza
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Ognen Pop-Georgievski
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Magdalena Konefał
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Martin Hrubý
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
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17
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18
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Billing BK, Dhar P, Singh N, Agnihotri PK. Augmenting static and dynamic mechanical strength of carbon nanotube/epoxy soft nanocomposites via modulation of purification and functionalization routes. SOFT MATTER 2018; 14:291-300. [PMID: 29243760 DOI: 10.1039/c7sm01768e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A detailed experimental investigation was carried out to establish the relationship between CNT purification and functionalization routes and the average response of CNT/epoxy nanocomposites under static and dynamic loading. It was shown that the relative improvement in the mechanical properties of the epoxy matrix due to the addition of CNTs depends on the choice of purification and functionalization steps. A better dispersion of CNTs was recorded for the functionalized CNTs as compared to the oxidized and CVD grown CNTs. Moreover, tensile, 3-point bending and nanoDMA testing performed on nanocomposites processed with CVD-grown, oxidized and functionalized CNTs revealed that COOH functionalization after the oxidation of CNTs at 350 °C is the optimized processing route to harness the excellent properties of CNTs in CNT/epoxy nanocomposites.
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Affiliation(s)
- Beant Kaur Billing
- Department of Mechanical Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India.
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19
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Rengaswamy K, Sakthivel DK, Muthukaruppan A, Natesan B, Venkatachalam S, Kannaiyan D. Electromagnetic interference (EMI) shielding performance of lightweight metal decorated carbon nanostructures dispersed in flexible polyvinylidene fluoride films. NEW J CHEM 2018. [DOI: 10.1039/c8nj02460j] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work demonstrates the enhanced EMI shielding performance of metal/carbon nanomaterials incorporated in a PVDF matrix with better electrical properties.
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Affiliation(s)
- Kumaran Rengaswamy
- Department of Chemical Engineering
- Anna University
- Chennai 600 025
- India
- Department of Chemistry & Research Institute
| | - Dinesh Kumar Sakthivel
- Microwave Laboratory
- Department of Physics
- Indian Institute of Technology Madras
- Chennai 600036
- India
| | - Alagar Muthukaruppan
- Centre of Excellence for Advanced Materials Manufacturing, Processing and Characterisation (CoExAMMPC)
- Vignan's University
- Guntur-522 213
- India
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20
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Janas D, Stando G. Unexpectedly strong hydrophilic character of free-standing thin films from carbon nanotubes. Sci Rep 2017; 7:12274. [PMID: 28947791 PMCID: PMC5612993 DOI: 10.1038/s41598-017-12443-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 09/11/2017] [Indexed: 11/09/2022] Open
Abstract
We report on the development of a method of formation of hydrophilic carbon nanotube (CNT) films. The technique is simple, straightforward and does not require specialized equipment or use of harsh chemical compounds. Elimination of the need for oxidizing agents has paramount implications because it preserves the inherent CNT properties. A reference study, in which the traditional method of oxidation of CNTs was used to introduce functional groups, gave smaller reduction of water contact angle and made a negative influence on the surface chemistry. From the practical point of view, this method is an important step towards implementation of CNTs in the real life by making them more compatible with interface materials. Interestingly, the method gives high level of control over the surface character of CNT films and hydrophilic character can be precisely patterned where required.
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Affiliation(s)
- Dawid Janas
- Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland.
| | - Grzegorz Stando
- Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland
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21
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Carbon fiber/epoxy composites: effect of zinc sulphide coated carbon nanotube on thermal and mechanical properties. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2115-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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22
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Khobragade PS, Hansora DP, Naik JB, Njuguna J, Mishra S. Physico-mechanical properties of nano-polystyrene-decorated graphene oxide-epoxy composites. POLYM INT 2017. [DOI: 10.1002/pi.5392] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Prashant S Khobragade
- University Institute of Chemical Technology; North Maharashtra University; Jalgaon India
| | - Dharmesh P Hansora
- University Institute of Chemical Technology; North Maharashtra University; Jalgaon India
| | - Jitendra B Naik
- University Institute of Chemical Technology; North Maharashtra University; Jalgaon India
| | - James Njuguna
- School of Engineering; Robert Gordon University; Aberdeen UK
| | - Satyendra Mishra
- University Institute of Chemical Technology; North Maharashtra University; Jalgaon India
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23
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Lin ZI, Lou CW, Pan YJ, Hsieh CT, Huang CL, Huang CH, Chen YS, Lin JH. The effects of MWCNT length on the mechanical, crystallization and electromagnetic interference shielding effectiveness of PP/MWCNT composites. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-016-1121-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Garate H, Bianchi M, Pietrasanta LI, Goyanes S, D'Accorso NB. High-Energy Dissipation Performance in Epoxy Coatings by the Synergistic Effect of Carbon Nanotube/Block Copolymer Conjugates. ACS APPLIED MATERIALS & INTERFACES 2017; 9:930-943. [PMID: 28004915 DOI: 10.1021/acsami.6b13212] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Hierarchical assembly of hard/soft nanoparticles holds great potential as reinforcements for polymer nanocomposites with tailored properties. Here, we present a facile strategy to integrate polystyrene-grafted carbon nanotubes (PSgCNT) (0.05-0.3 wt %) and poly(styrene-b-[isoprene-ran-epoxyisoprene]-b-styrene) block copolymer (10 wt %) into epoxy coatings using an ultrasound-assisted noncovalent functionalization process. The method leads to cured nanocomposites with core-shell block copolymer (BCP) nanodomains which are associated with carbon nanotubes (CNT) giving rise to CNT-BCP hybrid structures. Nanocomposite energy dissipation and reduced Young's Modulus (E*) is determined from force-distance curves by atomic force microscopy operating in the PeakForce QNM imaging mode and compared to thermosets modified with BCP and purified carbon nanotubes (pCNT). Remarkably, nanocomposites bearing PSgCNT-BCP conjugates display an increase in energy dissipation of up to 7.1-fold with respect to neat epoxy and 53% more than materials prepared with pCNT and BCP at the same CNT load (0.3 wt %), while reduced Young's Modulus shows no significant change with CNT type and increases up to 25% compared to neat epoxy E* at a CNT load of 0.3 wt %. The energy dissipation performance of nanocomposites is also reflected by the lower wear coefficients of materials with PSgCNT and BCP compared to those with pCNT and BCP, as determined by abrasion tests. Furthermore, scanning electron microscopy (SEM) images taken on wear surfaces show that materials incorporating PSgCNT and BCP exhibit much more surface deformation under shear forces in agreement with their higher ability to dissipate more energy before particle release. We propose that the synergistic effect observed in energy dissipation arises from hierarchical assembly of PSgCNT and BCP within the epoxy matrix and provides clues that the CNT-BCP interface has a significant role in the mechanisms of energy dissipation of epoxy coating modified by CNT-BCP conjugates. These findings provide a means to design epoxy-based coatings with high-energy dissipation performance.
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Affiliation(s)
- Hernan Garate
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Micaela Bianchi
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Lía I Pietrasanta
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Silvia Goyanes
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Norma B D'Accorso
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
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25
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Gao L, Zhang Q, Li H, Yu S, Zhong W, Sui G, Yang X. Effect of epoxy monomer structure on the curing process and thermo-mechanical characteristics of tri-functional epoxy/amine systems: a methodology combining atomistic molecular simulation with experimental analyses. Polym Chem 2017. [DOI: 10.1039/c7py00063d] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A methodology, which combined molecular simulation with experimental research, was established to expound the performance of a tri-functional epoxy/amine system.
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Affiliation(s)
- Liang Gao
- State Key Laboratory of Organic–Inorganic Composites
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Qingjie Zhang
- State Key Laboratory of Organic–Inorganic Composites
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Hao Li
- State Key Laboratory of Organic–Inorganic Composites
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Siruo Yu
- State Key Laboratory of Organic–Inorganic Composites
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Weihong Zhong
- School of Mechanical and Materials Engineering
- Washington State University
- Pullman
- USA
| | - Gang Sui
- State Key Laboratory of Organic–Inorganic Composites
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Xiaoping Yang
- State Key Laboratory of Organic–Inorganic Composites
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
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26
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Varghai D, Maiorana A, Meng Q, Gross RA, Manas-Zloczower I. Sustainable, electrically-conductive bioepoxy nanocomposites. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.11.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Tailored interface resulting in improvement in mechanical properties of epoxy composites containing poly (ether ether ketone) grafted multiwall carbon nanotubes. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.107] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Prediction of strain rate sensitivity of high density polyethylene using integral transform of dynamic mechanical analysis data. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.053] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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29
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Hoepfner JC, Pezzin SH. Functionalization of carbon nanotubes with (3-glycidyloxypropyl)-trimethoxysilane: Effect of wrapping on epoxy matrix nanocomposites. J Appl Polym Sci 2016. [DOI: 10.1002/app.44245] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jean Carlos Hoepfner
- Center of Technological Sciences; Santa Catarina State University; Joinville Santa Catarina Brazil
| | - Sérgio Henrique Pezzin
- Center of Technological Sciences; Santa Catarina State University; Joinville Santa Catarina Brazil
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30
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Wu Y, Gu Z, Chen M, Zhu C, Liao H. Effect of functionalization of multi-walled carbon nanotube on mechanical and viscoelastic properties of polysulfide-modified epoxy nanocomposites. HIGH PERFORM POLYM 2016. [DOI: 10.1177/0954008316632290] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In order to obtain epoxy compounds with excellent mechanical properties without compromising other desired properties, pristine- or carboxyl-functionalized multi-walled carbon nanotube (p-MWCNT or f-MWCNT) along with polysulfide were incorporated into an amine-cured epoxy resin. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses proved the existence of carboxyl groups on the surface of f-MWCNT. Adding 0.1 wt% f-MWCNT significantly improved the tensile strength and impact strength of the epoxy nanocomposites by 104% and 47%, respectively. However, adding p-MWCNT had little effect on the mechanical properties of the nanocomposites. The glass transition temperature of the f-MWCNT/epoxy nanocomposites were also much higher than neat epoxy matrix and p-MWCNT/epoxy nanocomposites. The fracture surface morphology and dynamic mechanical analysis results indicated that the interfacial interactions between f-MWCNT and the epoxy matrix were much stronger than that of p-MWCNT, which ensured the much-improved mechanical properties.
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Affiliation(s)
- Yeping Wu
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, Sichuan, China
| | - Zhongyun Gu
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, Sichuan, China
| | - Maobin Chen
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, Sichuan, China
| | - Chunhua Zhu
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, Sichuan, China
| | - Hong Liao
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, Sichuan, China
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31
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Tang X, Zhou Y, Peng M. Green Preparation of Epoxy/Graphene Oxide Nanocomposites Using a Glycidylamine Epoxy Resin as the Surface Modifier and Phase Transfer Agent of Graphene Oxide. ACS APPLIED MATERIALS & INTERFACES 2016; 8:1854-66. [PMID: 26720708 DOI: 10.1021/acsami.5b09830] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
In studies of epoxy/graphene oxide (GO) nanocomposites, organic solvents are commonly used to disperse GO, and vigorous mechanical processes and complicated modification of GO are usually required, increasing the cost and hindering the development and application of epoxy nanocomposites. Here, we report a green, facile, and efficient method of preparing epoxy/GO nanocomposites. When triglycidyl para-aminophenol (TGPAP), a commercially available glycidyl amine epoxy resin with one tertiary amine group per molecule, is used as both the surface modifier and phase transfer agent of GO, GO can be directly and rapidly transferred from water to diglycidyl ether of bisphenol A and other types of epoxy resins by manual stirring under ambient conditions, whereas GO cannot be transferred to these epoxy resins in the absence of TGPAP. The interaction between TGPAP and GO and the effect of the TGPAP content on the dispersion of GO in the epoxy matrix were investigated systematically. Superior dispersion and exfoliation of GO nanosheets and remarkably improved mechanical properties, including tensile and flexural properties, toughness, storage modulus, and microhardness, of the epoxy/GO nanocomposites with a suitable amount of TGPAP were demonstrated. This method is organic-solvent-free and technically feasible for large-scale preparation of high-performance nanocomposites; it opens up new opportunities for exploiting the unique properties of graphene or even other nanofillers for a wide range of applications.
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Affiliation(s)
- Xinlei Tang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
| | - Yang Zhou
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
| | - Mao Peng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China
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32
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Ye Y, Yuan L, Liang G, Gu A. Simultaneously toughening and strengthening cyanate ester resin with better dielectric properties by building nanostructures in its crosslinked network using polyimide-block-polysiloxane rod-coil block copolymers. RSC Adv 2016. [DOI: 10.1039/c6ra08229g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The fabrication and origin of high performance cyanate ester resins by building nanostructures in its crosslinked network with polyimide-block-polysiloxane block copolymers.
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Affiliation(s)
- Yayi Ye
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Materials Science and Engineering
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
| | - Li Yuan
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Materials Science and Engineering
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
| | - Guozheng Liang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Materials Science and Engineering
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
| | - Aijuan Gu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Materials Science and Engineering
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
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33
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Konnola R, Joseph K. Effect of side-wall functionalisation of multi-walled carbon nanotubes on the thermo-mechanical properties of epoxy composites. RSC Adv 2016. [DOI: 10.1039/c6ra00080k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sidewall functionalisation of multi-walled carbon nanotubes using liquid rubber results in enhancement in thermo-mechanical properties of epoxy composites.
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Affiliation(s)
- Raneesh Konnola
- Department of Chemistry
- Indian Institute of Space Science and Technology
- Thiruvananthapuram-695547
- India
| | - Kuruvilla Joseph
- Department of Chemistry
- Indian Institute of Space Science and Technology
- Thiruvananthapuram-695547
- India
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34
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Aris A, Shojaei A, Bagheri R. Cure Kinetics of Nanodiamond-Filled Epoxy Resin: Influence of Nanodiamond Surface Functionality. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b01858] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Atousa Aris
- Department
of Chemical and Petroleum Engineering, Sharif University of Technology, P.O. Box 11155-9465, Tehran, Iran
| | - Akbar Shojaei
- Department
of Chemical and Petroleum Engineering, Sharif University of Technology, P.O. Box 11155-9465, Tehran, Iran
| | - Reza Bagheri
- Polymeric
Materials Research Group, Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11155-9466, Tehran, Iran
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35
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Du FP, Yang W, Zhang F, Tang CY, Liu SP, Yin L, Law WC. Enhancing the Heat Transfer Efficiency in Graphene-Epoxy Nanocomposites Using a Magnesium Oxide-Graphene Hybrid Structure. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14397-14403. [PMID: 26075677 DOI: 10.1021/acsami.5b03196] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Composite materials, such as organic matrices doped with inorganic fillers, can generate new properties that exhibit multiple functionalities. In this paper, an epoxy-based nanocomposite that has a high thermal conductivity and a low electrical conductivity, which are required for the use of a material as electronic packaging and insulation, was prepared. The performance of the epoxy was improved by incorporating a magnesium oxide-coated graphene (MgO@GR) nanomaterial into the epoxy matrix. We found that the addition of a MgO coating not only improved the dispersion of the graphene in the matrix and the interfacial bonding between the graphene and epoxy but also enhanced the thermal conductivity of the epoxy while preserving the electrical insulation. By adding 7 wt % MgO@GR, the thermal conductivity of the epoxy nanocomposites was enhanced by 76% compared with that of the neat epoxy, and the electrical resistivity was maintained at 8.66 × 10(14) Ω m.
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Affiliation(s)
- Fei-Peng Du
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Wen Yang
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Fang Zhang
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Chak-Yin Tang
- ‡Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Sheng-Peng Liu
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Le Yin
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Wing-Cheung Law
- ‡Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
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36
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Rohini R, Bose S. Tailored interface and enhanced elastic modulus in epoxy-based composites in presence of branched poly(ethyleneimine) grafted multiwall carbon nanotubes. Phys Chem Chem Phys 2015; 17:7907-13. [PMID: 25721659 DOI: 10.1039/c4cp06085g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, branched poly(ethyleneimine), BPEI, was synthesized from carboxylic acid terminated multi-walled carbon nanotubes (c-MWNTs) and characterized using FTIR, TEM and TGA. The BPEI was then chemically grafted onto MWNTs to enhance the interfacial adhesion with the epoxy matrix. The epoxy composites with c-MWNTs and the BPEI-g-MWNTs were prepared using a sonication and mechanical stirring method, followed by curing at 100 °C and post-curing at 120 °C. The dynamic mechanical thermal analysis showed an impressive 49% increment in the storage elastic modulus in the composites. In addition, the nanoindentation on the composites exhibited significant improvement in the hardness and decrease in the plasticity index in the presence of the BPEI-g-MWNTs. Thus, epoxy composites with BPEI-g-MWNTs can be further explored as self-healing materials.
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Affiliation(s)
- Rani Rohini
- Department of Materials Engineering, Indian Institute of Science, Bangalore-560012, India.
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37
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Zhao L, Yuan L, Liang G, Gu A. Novel tough and thermally stable cyanate ester resins with high flame retardancy, low dielectric loss and constant based on a phenolphthalein type polyarylether sulfone. RSC Adv 2015. [DOI: 10.1039/c5ra10670b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Tough cyanate ester resins with good compatibility, low dielectric loss, high flame retardancy and thermal stability were developed.
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Affiliation(s)
- Lin Zhao
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Li Yuan
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Guozheng Liang
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Aijuan Gu
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
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38
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Akhter T, Mun SC, Saeed S, Park OO, Siddiqi HM. Enhancing the dielectric properties of highly compatible new polyimide/γ-ray irradiated MWCNT nanocomposites. RSC Adv 2015. [DOI: 10.1039/c5ra12109d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Novel polyimide/γ-ray irradiated MWCNT (PI/γ-MWCNT) nanocomposites with improved dielectric properties were fabricated by casting and curing processes.
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Affiliation(s)
- Toheed Akhter
- Department of Chemical and Biomolecular Engineering (BK21+ Graduate Program)
- KAIST
- Daejeon 305-701
- Republic of Korea
| | - Sung Cik Mun
- Department of Chemical and Biomolecular Engineering (BK21+ Graduate Program)
- KAIST
- Daejeon 305-701
- Republic of Korea
| | - Shaukat Saeed
- Department of Metallurgy and Materials Engineering
- Pakistan Institute of Engineering and Applied Sciences (PIEAS)
- Islamabad 45650
- Pakistan
| | - O. Ok Park
- Department of Chemical and Biomolecular Engineering (BK21+ Graduate Program)
- KAIST
- Daejeon 305-701
- Republic of Korea
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