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Pameté E, Wang Z, Béguin F. A Binary Ionogel Electrolyte for the Realization of an All Solid-State Electrical Double-Layer Capacitor Performing at Low Temperature. CHEMSUSCHEM 2024:e202400596. [PMID: 38797710 DOI: 10.1002/cssc.202400596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/20/2024] [Accepted: 05/21/2024] [Indexed: 05/29/2024]
Abstract
Over the last years, solid-state electrolytes made of an ionic liquid (IL) confined in a solid (inorganic or polymer) matrix, also known as ionogels, have been proposed to solve the leakage problems occurring at high temperatures in classical electrical double-layer capacitors (EDLCs) with an organic electrolyte, and thereof improve the safety. However, making ionogel-based EDLCs perform with reasonable power at low temperature is still a major challenge due to the high melting point of the confined IL. To overcome these limitations, the present contribution discloses ionogel films prepared in a totally oxygen/moisture-free atmosphere by encapsulating 70 wt % of an equimolar mixture of 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide and 1-ethyl-3-methylimidazolium tetrafluoroborate - [EMIm][BF4]0.5[FSI]0.5 - into a poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) network. The further called "binary ionogel" films demonstrated a high flexibility and a good ionic conductivity of 5.8 mS cm-1 at 20 °C. Contrary to the ionogels prepared from either [EMIm][FSI] or [EMIm][BF4], displaying melting at Tm=-16 °C and -7 °C, respectively, the crystallization of confined [EMIm][BF4]0.5[FSI]0.5 is quenched in the binary ionogel, which shows only a glass transition at -101 °C. This quenching enables an increased ionicity and ionic diffusion at the interface with the PVdF host network, leading the binary ionogel membrane to display higher ionic conductivity below -20 °C than the parent binary [EMIm][BF4]0.5[FSI]0.5 liquid. Laminate EDLCs were built with a 100 μm thick binary ionogel separator and electrodes made from a hierarchical micro-/mesoporous MgO-templated carbon containing a reasonable proportion of mesopores to enhance the mass transport of ions, especially at low temperature where the ionic diffusion noticeably decreases. The EDLCs operated up to 3.0 V with ideal EDL characteristics from -40 °C to room temperature. Their output specific energy under a discharge power of 1 kW kg-1 is ca. 4 times larger than with a cell implementing the same carbon electrodes together with the binary [EMIm][BF4]0.5[FSI]0.5 liquid. Hence, this binary ionogel electrolyte concept paves the road for developing safe and flexible solid-state energy storage devices operating at subambient temperatures in extreme environments.
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Affiliation(s)
- Emmanuel Pameté
- Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, 60-965, Poznan, Poland
| | - Zhuanpei Wang
- Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, 60-965, Poznan, Poland
| | - François Béguin
- Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, 60-965, Poznan, Poland
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Yempally S, Magadia P, Ponnamma D. Effect of Zn-Fe 2O 3 nanomaterials on the phase separated morphologies of polyvinylidene fluoride piezoelectric nanogenerators. RSC Adv 2023; 13:33863-33874. [PMID: 38020024 PMCID: PMC10658217 DOI: 10.1039/d3ra03745b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 11/02/2023] [Indexed: 12/01/2023] Open
Abstract
Self-powered devices based on piezoelectric nanogenerators (PENGs) are becoming crucial in the upcoming smart societies as they can integrate multifunctional applications, especially sensing, energy storage, etc. In this work, we explore the piezoelectric voltage generation happening in polyvinylidene fluoride (PVDF) nanocomposites developed by phase separation. The simple method adopted for the nanocomposite synthesis rules out the high voltage required for the normal electrospun PENGs and adds to their cost-effectiveness. Zinc-doped iron oxide (Zn-Fe2O3) nanomaterials influence the piezoelectric properties by enhancing the crystallinity and structural properties of the polymer. The phase separation process causes structural rearrangements within the PVDF by inducing the directional alignment of -CH2- and -CF2-chains and is the major reason for electroactive phase enhancement. Layers of Zn-Fe2O3 were uniformly distributed in the phase-separated PVDF without being negatively influenced by the solvent-non-solvent interactions during phase separation. At 3 wt%, the Zn-Fe2O3 induced an open circuit voltage of 0.41 volts, about 12 times greater than that of the neat PVDF film. Nanoparticles affected the thermal degradation and crystallinity of the polymer composites most effectively, and the dielectric properties of the PVDF/Zn-Fe2O3 composite microfilms were also pronounced. The proposed simple and cost-effective approach to flexible microfilm fabrication suggests significant applications in wearable electronics.
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Affiliation(s)
- Swathi Yempally
- Center for Advanced Materials, Qatar University P.O. Box 2713 Doha Qatar
| | - Patricia Magadia
- Chemical Engineering Department, College of Engineering, Qatar University 2713 Doha Qatar
| | - Deepalekshmi Ponnamma
- Materials Science and Technology Program, Department of Mathematics, Statistics and Physics, College of Arts and Sciences, Qatar University 2713 Doha Qatar +974-50182442
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3
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Wu Q, Luo W, Du Y, Yang Y, Xiao Y, Cheng N, Tang B, Li H, Wang L, Wang D, Wang C, Guan J, Shen X. Engineered and Durable Antimicrobial Polymer via Controllable Immobilization of Ionic Liquids onto the Poly(lactic acid) Chains. Biomacromolecules 2023; 24:3522-3531. [PMID: 37285477 DOI: 10.1021/acs.biomac.3c00282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nowadays, the development of effective modification methods for PLA has gained significant interest because of the wide application of antimicrobial PLA materials in the medical progress. Herein, the ionic liquid (IL) 1-vinyl-3-butylimidazolium bis(trifluoromethylsulfonyl)imide, has been grafted onto the PLA chains successfully in the PLA/IL blending films via electron beam (EB) radiation for the miscibility between PLA and IL. It was found that the existence of IL in the PLA matrix can significantly improve the chemical stability under EB radiation. The Mn of PLA-g-IL copolymer did not change obviously but was just decreased from 6.80 × 104 g/mol to 5.20 × 104 g/mol after radiation with 10 kGy. The obtained PLA-g-IL copolymers showed excellent filament forming property during electrospinning process. The spindle structure on the nanofibers can be completely eliminated after feeding only 0.5 wt % ILs for the improvement of ionic conductivity. Specially, the prepared PLA-g-IL nonwovens exhibited outstanding and durable antimicrobial activity for the enrichment of immobilized ILs on the nanofiber surface. This work provides a feasible strategy to realize the modification of functional ILs onto PLA chains with low EB radiation doses, which may have huge potential application in the medical and packaging industry.
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Affiliation(s)
- Qingsong Wu
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
| | - Wentao Luo
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
| | - Yanqiu Du
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing University, Jiaxing 314001, China
| | - Yaru Yang
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing University, Jiaxing 314001, China
| | - Yunchao Xiao
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing University, Jiaxing 314001, China
| | - Na Cheng
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing University, Jiaxing 314001, China
| | - Bolin Tang
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing University, Jiaxing 314001, China
| | - Haidong Li
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing University, Jiaxing 314001, China
| | - Lei Wang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Deshen Wang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Chunyu Wang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Jipeng Guan
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing University, Jiaxing 314001, China
| | - Xiaojun Shen
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing University, Jiaxing 314001, China
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4
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Asaftei M, Lucidi M, Cirtoaje C, Holban AM, Charitidis CA, Yang F, Wu A, Stanciu GA, Sağlam Ö, Lazar V, Visca P, Stanciu SG. Fighting bacterial pathogens with carbon nanotubes: focused review of recent progress. RSC Adv 2023; 13:19682-19694. [PMID: 37396836 PMCID: PMC10308885 DOI: 10.1039/d3ra01745a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 06/13/2023] [Indexed: 07/04/2023] Open
Abstract
The fast and global spread of bacterial resistance to currently available antibiotics results in a great and urgent need for alternative antibacterial agents and therapeutic strategies. Recent studies on the application of nanomaterials as antimicrobial agents have demonstrated their potential for the management of infectious diseases. Among the diverse palette of nanomaterials currently used in biomedical applications, carbon nanotubes (CNTs) have gained massive interest given their many valuable properties, such as high thermal and electrical conductivity, tensile strength, flexibility convenient aspect ratio, and low fabrication costs. All these features are augmented by facile conjugation with functional groups. CNTs are currently available in many configurations, with two main categories being single-walled and multi-walled CNTs, depending on the number of rolled-up single-layer carbon atoms sheets making up the nanostructure. Both classes have been identified over the past years as promising antibacterial agents but the current level of understanding of their efficiency still harbors many pending questions. This mini-review surveys recent progress on the topic of antibacterial effects of CNTs and examines the proposed mechanisms of action(s) of different CNT typologies, placing the main focus on past studies addressing the antibacterial activity on Staphylococcus aureus and Escherichia coli, two prototypical Gram-positive and Gram-negative pathogens, respectively.
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Affiliation(s)
- Mihaela Asaftei
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest Romania
- Department of Microbiology, University of Bucharest Romania
| | - Massimiliano Lucidi
- Department of Science, Roma Tre University Rome 00146 Italy
- NBFC, National Biodiversity Future Center Palermo 90133 Italy
| | | | | | - Costas A Charitidis
- Research Lab of Advanced, Composite, Nano-Materials and Nanotechnology, School of Chemical Engineering, National Technical University of Athens Greece
| | - Fang Yang
- CIXI Institute for Biomedical Engineering, Ningbo Institute for Materials Technology and Engineering, Chinese Academy of Sciences China
| | - Aiguo Wu
- CIXI Institute for Biomedical Engineering, Ningbo Institute for Materials Technology and Engineering, Chinese Academy of Sciences China
| | - George A Stanciu
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest Romania
| | - Özge Sağlam
- Department of Mechanical Engineering, İzmir University of Economics Turkey
| | - Veronica Lazar
- Department of Microbiology, University of Bucharest Romania
| | - Paolo Visca
- Department of Science, Roma Tre University Rome 00146 Italy
- Santa Lucia Foundation IRCCS Rome 00179 Italy
| | - Stefan G Stanciu
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest Romania
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5
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Saleh AA, Melenka GW, Leung SN. Processing‐structure–property
relationships in the fabrication of extrusion electroactive poly(vinylidenefluoride) filaments. J Appl Polym Sci 2023. [DOI: 10.1002/app.53885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Orduna L, Otaegi I, Aranburu N, Guerrica-Echevarría G. Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:725. [PMID: 36839093 PMCID: PMC9966306 DOI: 10.3390/nano13040725] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Good dispersion of carbon nanotubes (CNTs) together with effective curing were obtained in epoxy/CNT nanocomposites (NCs) using three different ionic liquids (ILs). Compared to conventional amine-cured epoxy systems, lower electrical percolation thresholds were obtained in some of the IL-based epoxy systems. For example, the percolation threshold of the trihexyltetradecylphosphonium dicyanamide (IL-P-DCA)-based system was 0.001 wt.%. The addition of CNTs was not found to have any significant effect on the thermal or low-strain mechanical properties of the nanocomposites, but it did improve their adhesive properties considerably compared to the unfilled systems. This study demonstrates that ILs can be used to successfully replace traditional amine-based curing agents for the production of electrically conductive epoxy/CNT NCs and adhesives, as a similar or better balance of properties was achieved. This represents a step towards greater sustainability given that the vapor pressure of ILs is low, and the amount needed to effectively cure epoxy resins is significantly lower than any of their counterparts.
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Ahmad A, Mansor N, Mahmood H, Sharif F, Safdar R, Moniruzzaman M. Evaluation thermal degradation kinetics of ionic liquid assisted polyetheretherketone‐multiwalled carbon nanotubes composites. J Appl Polym Sci 2023. [DOI: 10.1002/app.53647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Aqeel Ahmad
- Department of Chemical Engineering Universiti Teknologi PETRONAS Seri Iskandar Malaysia
- Center of Research in Ionic Liquids (CORIL) Universiti Teknologi PETRONAS Seri Iskandar Malaysia
| | - Nurlidia Mansor
- Centre for Student Development Universiti Teknologi PETRONAS Seri Iskandar Malaysia
| | - Hamayoun Mahmood
- Department of Chemical, Polymer and Composite Materials Engineering University of Engineering and Technology (UET) Lahore Pakistan
| | - Faiza Sharif
- Interdisciplinary Research Centre in Biomedical Materials COMSATS University Islamabad Lahore Pakistan
| | - Rizwan Safdar
- Chemical Engineering in Advanced Materials and Renewable Energy Research Group, School of Engineering and Technology Van Lang University Ho Chi Minh City Vietnam
| | - Muhammad Moniruzzaman
- Department of Chemical Engineering Universiti Teknologi PETRONAS Seri Iskandar Malaysia
- Center of Research in Ionic Liquids (CORIL) Universiti Teknologi PETRONAS Seri Iskandar Malaysia
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8
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Lapp AS, Merrill LC, Wygant BR, Ashby DS, Bhandarkar AS, Zhang AC, Fuller EJ, Harrison KL, Lambert TN, Talin AA. Room-Temperature Pseudo-Solid-State Iron Fluoride Conversion Battery with High Ionic Conductivity. ACS APPLIED MATERIALS & INTERFACES 2023; 15:893-902. [PMID: 36538758 DOI: 10.1021/acsami.2c16332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Li-metal batteries (LMBs) employing conversion cathode materials (e.g., FeF3) are a promising way to prepare inexpensive, environmentally friendly batteries with high energy density. Pseudo-solid-state ionogel separators harness the energy density and safety advantages of solid-state LMBs, while alleviating key drawbacks (e.g., poor ionic conductivity and high interfacial resistance). In this work, a pseudo-solid-state conversion battery (Li-FeF3) is presented that achieves stable, high rate (1.0 mA cm-2) cycling at room temperature. The batteries described herein contain gel-infiltrated FeF3 cathodes prepared by exchanging the ionic liquid in a polymer ionogel with a localized high-concentration electrolyte (LHCE). The LHCE gel merges the benefits of a flexible separator (e.g., adaptation to conversion-related volume changes) with the excellent chemical stability and high ionic conductivity (∼2 mS cm-1 at 25 °C) of an LHCE. The latter property is in contrast to previous solid-state iron fluoride batteries, where poor ionic conductivities necessitated elevated temperatures to realize practical power levels. The stable, room-temperature Li-FeF3 cycling performance obtained with the LHCE gel at high current densities paves the way for exploring a range of architectures including flexible, three-dimensional, and custom shape batteries.
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Affiliation(s)
- Aliya S Lapp
- Materials Physics Department, Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550, United States
| | - Laura C Merrill
- Nanoscale Sciences Department, Sandia National Laboratories, 1515 Eubank Blvd. SE, Albuquerque, New Mexico 87123, United States
| | - Bryan R Wygant
- Photovoltaics and Materials Technology Department, Sandia National Laboratories, 1515 Eubank Blvd. SE, Albuquerque, New Mexico 87123, United States
| | - David S Ashby
- Materials Physics Department, Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550, United States
| | - Austin S Bhandarkar
- Materials Physics Department, Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550, United States
| | - Alan C Zhang
- Materials Physics Department, Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550, United States
| | - Elliot J Fuller
- Materials Physics Department, Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550, United States
| | - Katharine L Harrison
- Nanoscale Sciences Department, Sandia National Laboratories, 1515 Eubank Blvd. SE, Albuquerque, New Mexico 87123, United States
| | - Timothy N Lambert
- Photovoltaics and Materials Technology Department, Sandia National Laboratories, 1515 Eubank Blvd. SE, Albuquerque, New Mexico 87123, United States
| | - A Alec Talin
- Materials Physics Department, Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550, United States
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Gaumond B, Livi S, Gérard JF, Duchet-Rumeau J. Imidazolium Salt for Enhanced Interfacial Shear Strength in Polyphenylene Sulfide/Ex-PAN Carbon Fiber Composites. Polymers (Basel) 2022; 14:polym14173692. [PMID: 36080769 PMCID: PMC9459804 DOI: 10.3390/polym14173692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/30/2022] [Accepted: 08/31/2022] [Indexed: 11/16/2022] Open
Abstract
Processing structural or semi-structural thermoplastic-based composites is a promising solution to solve the environmental issues of the aeronautic industry. However, these composites must withstand high standard specification to ensure safety during transportation. For this reason, there is a real need to develop strong interactions between thermoplastic polymers and reinforcement fibers. This paper investigates relationships between the surface chemistry, microstructure and micromechanical properties between polyphenylene sulfide and ex-PAN carbon fibers. The incorporation of ionic salt such as 1,3-Bis(4-carboxyphenyl)imidazolium chloride into neat polyphenylene sulfide was able to significantly increase the interfacial shear strength measured by microbond micromechanical test combined with different carbon fiber surfaces treatment.
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Huang Z, Wan Z, LU D, Mi Y, Su H. On the characterization of viscoelastic behaviours of ultra-high molecular polyethylene composite with 1-ethyl-3-methylimidazolium ethyl sulfate ionic liquid. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03187-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Simultaneously Improved Dielectric Constant and Breakdown Strength of PVDF-based Composites with Polypyrrole Nanowire Encapsuled Molybdenum Disulfide Nanosheets. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2693-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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12
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Ahmad A, Mansor N, Mahmood H, Iqbal T, Moniruzzaman M. Effect of ionic liquids on thermomechanical properties of polyetheretherketone‐multiwalled carbon nanotubes nanocomposites. J Appl Polym Sci 2022. [DOI: 10.1002/app.51788] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Aqeel Ahmad
- Department of Chemical Engineering, Universiti Teknologi PETRONAS Bandar Seri Iskandar Malaysia
- Center of Research in Ionic Liquids (CORIL), Universiti Teknologi PETRONAS Bandar Seri Iskandar Malaysia
| | - Nurlidia Mansor
- Centre for Student Development, Universiti Teknologi PETRONAS Bandar Seri Iskandar Malaysia
| | - Hamayoun Mahmood
- Department of Chemical Engineering University of Engineering and Technology (UET), New Campus Lahore Pakistan
| | - Tanveer Iqbal
- Department of Chemical Engineering University of Engineering and Technology (UET), New Campus Lahore Pakistan
| | - Muhammad Moniruzzaman
- Department of Chemical Engineering, Universiti Teknologi PETRONAS Bandar Seri Iskandar Malaysia
- Center of Research in Ionic Liquids (CORIL), Universiti Teknologi PETRONAS Bandar Seri Iskandar Malaysia
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13
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Liu Z, Wang H, Liu K, Li H, Sun X, Hu J, Wang S, Yuan C, Yan S. Ionic Liquid Assisted α–γ′ Phase Transition of Poly(vinylidene fluoride) Thin Films. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zixiong Liu
- Shaanxi University of Science and Technology, Xi’an 710021, Shaanxi, China
| | - Haijun Wang
- Shaanxi University of Science and Technology, Xi’an 710021, Shaanxi, China
| | - Kun Liu
- Shaanxi University of Science and Technology, Xi’an 710021, Shaanxi, China
| | - Huihui Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaoli Sun
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jian Hu
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science and Technology, Qingdao City 266042, China
| | - Shaojuan Wang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science and Technology, Qingdao City 266042, China
| | - Chunlei Yuan
- Shaanxi University of Science and Technology, Xi’an 710021, Shaanxi, China
| | - Shouke Yan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science and Technology, Qingdao City 266042, China
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14
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Liu J, Shang Y, Shao Z, Liu X, Zhang C. Three-Dimensional Printing to Translate Simulation to Architecting for Three-Dimensional High Performance Piezoelectric Energy Harvester. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c04433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jingfeng Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China
| | - Yinghao Shang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China
| | - Zhuzhu Shao
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China
| | - Xingang Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China
| | - Chuhong Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China
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15
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Wang TH, Wang WX, Chang HC. Pressure-Dependent Clustering in Ionic-Liquid-Poly (Vinylidene Fluoride) Mixtures: An Infrared Spectroscopic Study. NANOMATERIALS 2021; 11:nano11082099. [PMID: 34443929 PMCID: PMC8400791 DOI: 10.3390/nano11082099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/11/2021] [Accepted: 08/17/2021] [Indexed: 12/03/2022]
Abstract
The nanostructures of ionic liquids (ILs) have been the focus of considerable research attention in recent years. Nevertheless, the nanoscale structures of ILs in the presence of polymers have not been described in detail at present. In this study, nanostructures of ILs disturbed by poly(vinylidene fluoride) (PVdF) were investigated via high-pressure infrared spectra. For 1-(2-hydroxyethyl)-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([HEMIm][TFSI])-PVdF mixtures, non-monotonic frequency shifts of the C4,5-H vibrations upon dilution were observed under ambient pressure. The experimental results suggest the presence of microheterogeneity in the [HEMIm][TFSI] systems. Upon compression, PVdF further influenced the local structure of C4,5–H via pressure-enhanced IL–PVdF interactions; however, the local structures of C2–H and hydrogen-bonded O–H were not affected by PVdF under high pressures. For choline [TFSI]–PVdF mixtures, PVdF may disturb the local structures of hydrogen-bonded O–H. In the absence of the C4,5–H⋯anion and C2–H⋯anion in choline [TFSI]–PVdF mixtures, the O–H group becomes a favorable moiety for pressure-enhanced IL–PVdF interactions. Our results indicate the potential of high-pressure application for designing pressure-dependent electronic switches based on the possible changes in the microheterogeneity and electrical conductivity in IL-PVdF systems under various pressures.
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Affiliation(s)
| | | | - Hai-Chou Chang
- Correspondence: ; Tel.: +886-3-8903585; Fax: +886-3-8900162
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Badatya S, Bharti DK, Sathish N, Srivastava AK, Gupta MK. Humidity Sustainable Hydrophobic Poly(vinylidene fluoride)-Carbon Nanotubes Foam Based Piezoelectric Nanogenerator. ACS APPLIED MATERIALS & INTERFACES 2021; 13:27245-27254. [PMID: 34096257 DOI: 10.1021/acsami.1c02237] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Light weight lead free, polymer, and carbon nanotubes based flexible piezoelectric nanogenerators have prompted widespread concern for harvesting mechanical energy and powering next generation electronics devices. Herein, lightweight polyvinylidene fluoride (PVDF)-carbon nanotube (CNT) foam was prepared to fabricate humid resistant hydrophobic flexible piezoelectric nanogenerator to converts mechanical energy into electricity for the first time. Hydrophobic piezoelectric PVDF-CNT foam with density of 0.15 g/cm3 was prepared by solution route. PVDF-CNT foam exhibited crystalline and a well-defined chain likes structure with 65% fraction of β-phase. Self-poled PVDF-CNT foam shows piezoelectric charge coefficient (d33) of 9.4 pC/N. High d33 of PVDF-CNT foam is caused by dipole alignment induced by local electric field of CNT in the microcellular structure of PVDF. The developed foam exhibits ultrahigh dielectric constant (ε') ∼ 3048 at 150 Hz. Flexible piezoelectric PVDF-CNT foam based nanogenerator was fabricated, which generates high output voltage ∼12 V and current density of 30 nA/cm2 at small compressive pressure of 0.02 kgf. Piezoelectric output performance was measured under different humid condition and an output voltage up to 8 V was achieved even under 60% RH condition. PVDF-CNT foam exhibited hydrophobic behavior and high surface water contact angle of 139°. Such high output voltage even under small pressure, without applying electrical poling and under humid condition was originated though CNT induced self-alignment of electric dipoles in PVDF polymer. These excellent performances of developed foam based device confirmed its potential application in organic based ultrasensitive self-powered nanosensors and nanosystems.
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Affiliation(s)
- Simadri Badatya
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Dhiraj Kumar Bharti
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Natarajan Sathish
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Avanish Kumar Srivastava
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Manoj Kumar Gupta
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
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A Succinct Review on the PVDF/Imidazolium-Based Ionic Liquid Blends and Composites: Preparations, Properties, and Applications. Processes (Basel) 2021. [DOI: 10.3390/pr9050761] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Poly(vinylidene fluoride) (PVDF) is a versatile thermoplastic fluoropolymer with intriguing characteristics, which is receiving considerable attention from researchers in many areas. Recently, PVDF and its copolymer, such as poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) have been blended with ionic liquids to produce blend and composite materials for target applications. In this succinct review, two types of ionic liquids that are utilized for the preparation of PVDF and PVDF-HFP blends and composites, namely, hydrophilic and hydrophobic imidazolium-based ionic liquids, are reviewed. In addition, the effect of the ionic liquids on the physicochemical properties of the PVDF and PVDF-HFP blends and composites, is described as well. On top of that, a multitude of applications of the blends and composites are also succinctly reviewed. This review may give inspirations to the polymer blend and composite researchers in diversifying the applications of thermoplastic fluoropolymers through the utilization of ionic liquids.
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Lv X, Liu C, Wu D, Song S, Shao Z, Sun S. Epoxy-based ionic liquid towards multi-walled carbon nanotubes/polybutylene terephthalate composite with excellent dispersion and conductivity behaviors. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02224-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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19
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Pontes K, Indrusiak T, Soares BG. Poly(vinylidene fluoride‐co‐hexafluorpropylene)/polyaniline conductive blends: Effect of the mixing procedure on the electrical properties and electromagnetic interference shielding effectiveness. J Appl Polym Sci 2020. [DOI: 10.1002/app.49705] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ketly Pontes
- PEMM‐COPPE, Centro de Tecnologia Universidade Federal do Rio de Janeiro Rio de Janeiro‐RJ Brazil
| | - Tamara Indrusiak
- PEMM‐COPPE, Centro de Tecnologia Universidade Federal do Rio de Janeiro Rio de Janeiro‐RJ Brazil
| | - Bluma G. Soares
- PEMM‐COPPE, Centro de Tecnologia Universidade Federal do Rio de Janeiro Rio de Janeiro‐RJ Brazil
- Instituto de Macromoléculas Universidade Federal do Rio de Janeiro Rio de Janeiro‐RJ Brazil
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20
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Zhao G, Zhu H. Cation-π Interactions in Graphene-Containing Systems for Water Treatment and Beyond. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1905756. [PMID: 32253804 DOI: 10.1002/adma.201905756] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 01/30/2020] [Indexed: 06/11/2023]
Abstract
Cation-π interactions are common in nature, especially in organisms. Their profound influences in chemistry, physics, and biology have been continuously investigated since they were discovered in 1981. However, the importance of cation-π interactions in materials science, regarding carbonaceous nanomaterials, has just been realized. The interplay between cations and delocalized polarizable π electrons of graphene would bring about significant changes to the intrinsic characteristics of graphene and greatly affect the device performance based on graphene and its derivatives. Here, the cation-π interactions in graphene containing systems for water treatment applications (e.g., separation membranes, adsorbents) are highlighted. The cross-linking effects caused by cation-π interactions contribute to membrane stability and selectivity and enhanced adsorption. Their roles in dominating the performance of graphene-based structures for other specific applications are also discussed. Relevant theoretical modeling and calculations are summarized to offer an in-depth understanding of the underlying mechanisms which can help in designing more functional materials and structures. Perspectives on the potential directions that deserve effort are also presented.
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Affiliation(s)
- Guoke Zhao
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Hongwei Zhu
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
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21
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Asai H, Zheng W, Nakane K. Effects of ionic liquid/water addition and electrospinning conditions on the crystal structures of poly(vinylidene fluoride) nanofibers. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122478] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Bains D, Singh G, Bhinder J, Agnihotri PK, Singh N. Ionic Liquid-Functionalized Multiwalled Carbon Nanotube-Based Hydrophobic Coatings for Robust Antibacterial Applications. ACS APPLIED BIO MATERIALS 2020; 3:2092-2103. [PMID: 35025261 DOI: 10.1021/acsabm.9b01217] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In recent years, the biomimetic superhydrophobic coatings have received tremendous attention, owing to their potential in fabricating self-cleaning surfaces, in environmental applications. Consequently, extensive research has been devoted to create a superhydrophobic surface using the oxidized derivatives of CNTs and graphene. Thus, the design and development of a self-cleaning/superhydrophobic surface with good biocompatibility are an effective approach to deal with the bacterial infections related to biomedical devices used in hospitals. In this context, herein, we have developed the material based on ionic liquid (IL)-functionalized multiwalled carbon nanotubes (MWCNTs) for hydrophobic coatings, which was fully characterized with various techniques such as Fourier transform infrared, powder X-ray diffraction, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. We have evaluated the synthesized ILs for their antibacterial potential against the pathogenic bacterial strains such as Gram-positive (Staphylococcus aureus and methicillin-resistant S. aureus) and Gram-negative (Escherichia coli) bacterial strains. Further, atomic force and scanning electron microscopic studies have been performed to investigate the morphological changes to unravel the mechanism of action, whereas DNA binding study indicates the binding of IL-1d@MWCNT with DNA (Ka = 2.390 × 104 M-1). Furthermore, the developed material (IL-1d@MWCNT) is coated onto the surface of polyvinyl chloride (PVC) and evaluated for hydrophobicity through water contact angle measurements and possesses long-term antibacterial efficiency against both under-investigating pathogenic strains. For the biocompatibility assay, the obtained coated PVC material has also been evaluated for its cytotoxicity, and results reveal no toxicity against viable cells. These all results are taken together, indicating that by coating with the developed material IL-1d@MWCNT, a robust self-sterilizing surface has achieved, which helps in maintaining a bacteria-free surface.
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Affiliation(s)
- Deepak Bains
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Gagandeep Singh
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Jasdeep Bhinder
- Department of Mechanical Engineering, Indian Institute of Technology Ropar (IIT Ropar) Rupnagar, Punjab 140001, India
| | - Prabhat K Agnihotri
- Department of Mechanical Engineering, Indian Institute of Technology Ropar (IIT Ropar) Rupnagar, Punjab 140001, India
| | - Narinder Singh
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
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23
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Ultrahigh Energy Storage Capacitance and High Breakdown Strength in Biaxially Oriented Poly(vinylidene fluoride) Using a High-Electric-Induced Technique. Macromol Res 2020. [DOI: 10.1007/s13233-020-8073-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
In this study, a simple method to obtain pure β-phase directly from the melt process is proposed. A series of PVDF and ionic liquid (IL) was prepared by a solvent casting method with appropriate associated with the subsequent annealing treatment. IL plays a role of filler, which can create strong electrostatic interaction with PVDF matrix and directly induce β-phase crystallization on the PVDF during the melt. PVDF film sample is immersed in hot water for annealing treatment at different temperatures (25 °C to 70 °C). We found that annealing in high temperatures especially can not only increase more IL inserted into the amorphous region of polymer matrix to make more phase transformation, but also accelerate IL removal. Characteristics and performance of the PVDF films were investigated by use of FTIR, XRD, SEM, and AFM. Piezoelectric coefficient d33 as well as d31, degree of crystallinity, and sensitivity are measured in experiment to verify the performance of PVDF film.
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Guo F, Zhao J, Li F, Kong D, Guo H, Wang X, Hu H, Zong L, Xu J. Polar crystalline phases of PVDF induced by interaction with functionalized boron nitride nanosheets. CrystEngComm 2020. [DOI: 10.1039/d0ce01001d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The PVDF/OH-BNNS nanocomposites mainly form a non-polar phase, while polar crystalline phases are the majority in the PVDF/NH2-BNNS nanocomposites.
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Affiliation(s)
- Fuhai Guo
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao 266042
- China
- China and School of Materials Science and Engineering
| | - Jian Zhao
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao 266042
- China
- China and School of Materials Science and Engineering
| | - Feixiang Li
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao 266042
- China
- China and School of Materials Science and Engineering
| | - Deyu Kong
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao 266042
- China
- China and School of Materials Science and Engineering
| | - Hongge Guo
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao 266042
- China
- China and School of Materials Science and Engineering
| | - Xin Wang
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao 266042
- China
- China and School of Materials Science and Engineering
| | - Haiqing Hu
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao 266042
- China
- China and School of Materials Science and Engineering
| | - Lingbo Zong
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao 266042
- China
- China and School of Materials Science and Engineering
| | - Junting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou
- China
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26
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Multiple-Step Melting/Irradiation: A Strategy to Fabricate Thermoplastic Polymers with Improved Mechanical Performance. Polymers (Basel) 2019; 11:polym11111812. [PMID: 31694160 PMCID: PMC6918411 DOI: 10.3390/polym11111812] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 10/29/2019] [Accepted: 10/29/2019] [Indexed: 01/23/2023] Open
Abstract
To fabricate thermoplastic polymers exhibiting improved ductility without the loss of strength, a novel multiple-step melting/irradiation (MUSMI) strategy was developed by taking poly(vinylidene fluoride)/triallyl isocyanate (PVDF/TAIC) as an example, in which alternate melting and irradiation were adopted and repeated for several times. The initial irradiation with a low dose produced some local crosslinked points (not 3-dimensional network). When the specimen was reheated above the melting temperature, they redistributed in the PVDF matrix, which is an efficient way to avoid the high crosslinking density at certain positions and the disappearance of thermoplastic properties. During the subsequent cooling process, the crosslinked domains in the thermoplastic polymer matrix is expected to play double roles in turning crystal structures for enhancing the ductility without reducing strength. On one hand, they can act as heterogeneous nucleation agents, resulting in higher nucleation density and smaller spherulites; on the other hand, the existence of crosslinked structures restricts the lamellar thickening, accounting for the thinner crystal lamellae. Both smaller spherulites and thinner lamellae contribute to better ductility. At the same time, these local crosslinked points enhance the connectivity of crystal structures (including lamellae and spherulites), which is beneficial to the improvement of strength. Based on the influence of local crosslinked points on the ductility and strength, thermoplastic PVDF with much higher elongation at break and comparable yielding stress (relative to the reference specimen upon strong irradiation only once) was prepared via MUSMI successfully.
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28
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Zamani M, Gholibegloo E, Aghajanzadeh M, Salehian F, Sadat Ebrahimi SE, Ganjali MR, Mahdavi H, Khoobi M. Polyvinyl alcohol-graphene oxide nanocomposites: evaluation of flame-retardancy, thermal and mechanical properties. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2019.1578617] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Mostafa Zamani
- School of Chemistry, University College of Science, University of Tehran, Tehran, Iran
- School of Pharmacy, Department of Pharmaceutical Biomaterials, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Elham Gholibegloo
- Biomaterials Group, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Mozhgan Aghajanzadeh
- School of Pharmacy, Department of Pharmaceutical Biomaterials, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Fatemeh Salehian
- Biomaterials Group, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Esmaeil Sadat Ebrahimi
- School of Pharmacy, Department of Medical Chemistry, International Campus, Tehran University of Medical Science, Tehran, Iran
| | - Mohammad Reza Ganjali
- Faculty of Chemistry, Center of Excellence in Electrochemistry, University of Tehran, Tehran, Iran
- Biosensor Research Center, Endocrinology & Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Mahdavi
- School of Chemistry, University College of Science, University of Tehran, Tehran, Iran
| | - Mehdi Khoobi
- Biomaterials Group, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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29
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Osaka N, Okauchi K, Eki Y, Noda Y. Unexpected cosolvency of water on poly(propylene glycol) in hydrophobic ionic liquid. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04551-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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30
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Meher D, Suman, Karna N, Sahoo B. Development of Poly (vinylidene fluoride) and Polyaniline blend with high dielectric permittivity, excellent electromagnetic shielding effectiveness and Ultra low optical energy band gap: Effect of ionic liquid and temperature. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121759] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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31
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Kou Y, Zhou W, Li X, Wang Z, Li Y, Cai H, Liu D, Chen F, Wang G, Dang ZM. Enhanced dielectric properties of PVDF nanocomposites with modified sandwich-like GO@PVP hybrids. POLYM-PLAST TECH MAT 2019. [DOI: 10.1080/25740881.2019.1669655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- Yujia Kou
- College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, China
- Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, University of Science and Technology, Harbin, China
| | - Wenying Zhou
- College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, China
- Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, University of Science and Technology, Harbin, China
| | - Xu Li
- College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, China
| | - Zijun Wang
- College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, China
| | - Ying Li
- College of Materials Science and Engineering, Xi’an University of Science & Technology, Xi’an, China
| | - Huiwu Cai
- College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, China
| | - Dengfeng Liu
- College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, China
| | - Fuxin Chen
- College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, China
| | - Guangheng Wang
- College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, China
| | - Zhi-Min Dang
- College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, China
- State Key Laboratory of Power System and Department of Electrical Engineering, Tsinghua University, Beijing, China
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32
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Ke K, Wang Y, Li Y, Yang J, Pötschke P, Voit B. Nuomici-Inspired Universal Strategy for Boosting Piezoresistive Sensitivity and Elasticity of Polymer Nanocomposite-Based Strain Sensors. ACS APPLIED MATERIALS & INTERFACES 2019; 11:35362-35370. [PMID: 31468973 DOI: 10.1021/acsami.9b13510] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Electrically conductive polymer composites (CPCs) are potential alternatives to conventional strain gauges due to their tunable sensitivity and strain ranges. Currently, to achieve very high piezoresistive sensitivity in thermoplastic-based CPCs with Gauge factors GF above 20 at low tensile strains (ε ≤ 5%) is a big challenge, but critical for structural health monitoring application in infrastructures. Here, inspired by the unique structures of a famous Chinese food, nuomici, we coat carbon nanotubes (CNTs) onto sticky acrylic rubber (AR) granules (ARG) to form nuomici-like CNT@ARG composite granules, which are employed as unique conductive filler to fabricate highly piezoresistive and flexible CPCs based on poly(vinylidene fluoride) (PVDF). This strategy of localizing CNTs densely on the surface of touching rubbery particles resulted in a much more sensitive elastic conductive network built by the CNT@AR composite and showed a big gain effect. The resultant PVDF/CNT@AR nanocomposites (AR content ranging from 0 to 10 wt %) show extremely high piezoresistive sensitivity at low strain, depending on the AR content. In particular, the GF value of PVDF with 1.5 wt % CNT@10 wt % AR is 41 at 5% strain, which is more than one magnitude higher than that (ca. 3) of traditional PVDF/CNT nanocomposite sensors. Moreover, the elongation at break increases by about 60% with the addition of 1.5 wt CNT@10 wt % AR. This study introduces a universal effective strategy for tailoring the mechanical properties and strain sensitivity of conductive network in CPCs, which is critical for the fabrication of high-performance strain sensors.
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Affiliation(s)
- Kai Ke
- Leibniz Institute of Polymer Research Dresden (IPF) , Hohe Str. 6 , 01069 Dresden , Germany
- Organic Chemistry of Polymers , Technische Universität Dresden , 01062 Dresden , Germany
| | - Yu Wang
- School of Mechanical and Materials Engineering , Washington State University , Pullman , Washington 99163 , United States
| | - Yilong Li
- Leibniz Institute of Polymer Research Dresden (IPF) , Hohe Str. 6 , 01069 Dresden , Germany
- Organic Chemistry of Polymers , Technische Universität Dresden , 01062 Dresden , Germany
| | - Jinghui Yang
- School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education) , Southwest Jiaotong University , Chengdu 610031 , China
| | - Petra Pötschke
- Leibniz Institute of Polymer Research Dresden (IPF) , Hohe Str. 6 , 01069 Dresden , Germany
| | - Brigitte Voit
- Leibniz Institute of Polymer Research Dresden (IPF) , Hohe Str. 6 , 01069 Dresden , Germany
- Organic Chemistry of Polymers , Technische Universität Dresden , 01062 Dresden , Germany
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The Role of Fluorinated IL as an Interfacial Agent in P(VDF-CTFE)/Graphene Composite Films. NANOMATERIALS 2019; 9:nano9081181. [PMID: 31430868 PMCID: PMC6724409 DOI: 10.3390/nano9081181] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/19/2019] [Accepted: 07/26/2019] [Indexed: 11/17/2022]
Abstract
The incorporation of graphene into a polymer matrix can endow composites with extended functions. However, it is difficult to well disperse pristine graphene into a polymer matrix in order to obtain polymer nanocomposites due to the lack of functional groups on the surface for bonding with a polymer matrix. Herein, we investigated the role of fluorinated ionic liquid (IL) as a new interfacial agent in poly(vinylidene fluoride-co-chlorotrifluoroethylene) (P(VDF-CTFE))/graphene composite films. First, a task-specific IL, perfluorooctyltriphenylphosphonium iodide (IL-C8F13), was synthesized and adsorbed on the surface of graphene oxide (GO) and reduced graphene oxide (rGO) for making functional nanofillers which were capable of being incorporated into the P(VDF-CTFE) matrix. The cation structure of IL combined three phenyls (potential π–π interactions with graphene) and a short fluorinated chain (enhanced miscibility with fluorinated matrix via dipolar interactions) to make a compatible graphene filler and P(VDF-CTFE) matrix at the interface among them. Second, two series of P(VDF-CTFE)/GO-IL and P(VDF-CTFE)/rGO-IL composites with different loading contents were prepared with the goal of providing an understanding of the mechanism of interfacial interactions. This paper investigated the difference in the interaction model between GO with IL and rGO with IL. Subsequently, the interfacial effect of IL on the properties of P(VDF-CTFE)/graphene composites, such as crystallization, chain segmental relaxation behavior, dispersion, and the final dielectric properties will be further studied.
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Xu Y, Xu H, Zheng Q, Song Y. Influence of ionic liquid on glass transition, dynamic rheology, and thermal stability of poly(methyl methacrylate)/silica nanocomposites. J Appl Polym Sci 2019. [DOI: 10.1002/app.48007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yiting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Huilong Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Yihu Song
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China
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35
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Salehi R, Roohi H. Tuning the physicochemical properties of the single-walled boron nitride nanotube by covalent grafting of triazolium-based [MTZ][X1–3] (X1–3= NTf2−, TfO− and BF4−) ionic liquids in the gas phase and solvent media: A quantum chemical approach. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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36
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Effect of ion-dipole interaction on the formation of polar extended-chain crystals in high pressure-crystallized poly(vinylidene fluoride). POLYMER 2018. [DOI: 10.1016/j.polymer.2018.10.063] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sahrash R, Siddiqa A, Razzaq H, Iqbal T, Qaisar S. PVDF based ionogels: applications towards electrochemical devices and membrane separation processes. Heliyon 2018; 4:e00847. [PMID: 30450432 PMCID: PMC6226564 DOI: 10.1016/j.heliyon.2018.e00847] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 09/10/2018] [Accepted: 10/04/2018] [Indexed: 11/28/2022] Open
Abstract
Ionogels have emerged as one of the most interesting and captivating form of composites which credits to the outstanding characteristics. One of the most important constituent of ionogels is ionic liquid, which show many attractive properties notably non-volatility, in-flammability, negligible vapor pressure, tunability, thermal stability and solvating ability. A large variety of matrix materials have been under consideration for ionogels, presently, polymer/ionic liquid based ionogels have attracted much attention. Numerous polymeric materials such as have been utilized for these polymer/ionic liquids based ionogels. Polyvinylidene fluoride (PVDF) has been on top of the line as a matrix material for polymer based ionogels owing to its stability, aging and chemical resistance and mechanical strength. This review is primarily concerned with the properties of polyvinylidene fluoride based ionogels with an emphasis on their applications in various domains electrochemical devices, gas separation and liquid/liquid separations.
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Affiliation(s)
- Rafida Sahrash
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan.,Department of Physics, University of Gujrat, Gujrat, Pakistan
| | - Asima Siddiqa
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan
| | - Humaira Razzaq
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan
| | - Tahir Iqbal
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan.,Department of Physics, University of Gujrat, Gujrat, Pakistan
| | - Sara Qaisar
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan
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Mani MR, Gebrekrstos A, Madras G, Pötschke P, Bose S. PVDF-MWNT interactions control process induced β-lamellar morphology and orientation in the nanocomposites. Phys Chem Chem Phys 2018; 20:24821-24831. [PMID: 30229767 DOI: 10.1039/c8cp03739f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of methylene blue (MB) modified multiwall carbon nanotubes (MWNTs) on the nucleation and morphology of polyvinylidene fluoride (PVDF) in comparison with the effect of MWNTs was systematically assessed by DSC, 13C NMR, FT-IR, TEM, WAXS and SAXS analysis. TEM analysis of ultra-microtomed samples revealed that MB modification enhanced the dispersibility of MWNTs in PVDF. Further, the nanocomposites were subjected to mechanical rolling and the synergistic effect of processing and fillers on the PVDF morphology (before and after rolling) at different length scales was studied. Both FT-IR and WAXS analyses suggested that mechanical rolling transforms α-PVDF to β-PVDF (ca. 88%). TEM and two-dimensional WAXS analyses revealed that the MWNTs and β-crystallites are oriented preferentially along the rolling direction and the degree of orientation is not influenced by the fillers suggesting that crystallite orientation is fully controlled by mechanical rolling. On the other hand, β-lamellae showed perpendicular orientation with respect to the rolling direction. Unlike β-crystallites, the β-lamellar morphology and orientation are highly governed by the fillers as evident from SAXS analysis. Using MWNTs and the MWNT-MB π-complex, we demonstrate that the β-lamellar morphology and degree of orientation are controlled by the extent of interaction of fillers with PVDF. Interestingly, both β-lamellar morphology and degree of orientation correlate well with the mechanical properties of the rolled PVDF. More specifically, the dynamic storage modulus of the samples in the rolling direction increases with increasing β-lamellar morphology and degree of orientation. The present work demonstrates that the polymer-filler interaction plays a crucial role in regulating the processed polymer morphology and can be tuned by appropriately modifying the surface of fillers through either covalent or non-covalent interactions.
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Affiliation(s)
- Mohan Raj Mani
- Department of Materials Engineering, Institute of Science, Bangalore 560012, India.
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Chen Y, Yao L, Yang C, Zhang L, Zheng P, Liu A, Shen QD. In-depth understanding of interfacial crystallization via Flash DSC and enhanced energy storage density in ferroelectric P(VDF-CTFE)/Au NRs nanocomposites for capacitor application. SOFT MATTER 2018; 14:7714-7723. [PMID: 30187063 DOI: 10.1039/c8sm01496e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
High-capacity or high-power-density capacitors are being actively investigated for portable electronics, electric vehicles, and electric power systems. We describe the filler system in dielectric nanocomposites with a small loading of Au nanorods [NRs] to elucidate the mechanism of interfacial crystallization behavior including the crystallization kinetics, and crystalline morphology and structure, and to investigate the intrinsic causes for concurrent great improvements in the dielectric constant and energy density in the nanocomposite system. Remarkly, at high crystallization temperature, the addition of Au NRs, which are used as heterogeneous nucleators, can reduce the nucleation barrier, resulting in accelerating the crystallization rate. However, the crystallization rate slows down at low temperatures because the addition of Au NRs limited the mobility of poly(vinylidene fluoride-chlorotrifluoroethylene) [P(VDF-CTFE)] chains, and thus enhanced the diffusion barrier. Furthermore, the addition of NRs has a huge impact on the crystalline morphology and structure which changes from large paraelectric α-phase spherulites with TGTG' conformations into minor ferroelectric γ-phase spherulites with T3GT3G' conformations, and also produces more exogenous interfaces between the lamellar crystals and amorphous regions, resulting in a higher dielectric constant and higher electric energy density in P(VDF-CTFE)/Au NRs nanocomposites. Our approach provides a facile and straightforward way to design or understand PVDF-based polymers for their practical applications in high-energy-density capacitors.
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Affiliation(s)
- Yingxin Chen
- College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China.
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Song S, Bi X, Jiang S, Lv X, Sun S, Li Q. Enhanced electroactive phase, toughness and dielectric properties of poly(vinylidene fluoride) with addition of MMA-BA-IL copolymer. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1561-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tian R, Xu Q, Lu C, Duan X, Xiong RG. Spontaneous polarization switching and piezoelectric enhancement of PVDF through strong hydrogen bonds induced by layered double hydroxides. Chem Commun (Camb) 2018; 53:7933-7936. [PMID: 28657092 DOI: 10.1039/c7cc04240j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The spontaneous dipole alignment of PVDF has been achieved in the formation process of a film through strong hydrogen bonds between PVDF and layered double hydroxides (LDHs), and the as-prepared composite film exhibits excellent energy conversion and storage ability.
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Affiliation(s)
- Rui Tian
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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Ruan L, Yao X, Chang Y, Zhou L, Qin G, Zhang X. Properties and Applications of the β Phase Poly(vinylidene fluoride). Polymers (Basel) 2018; 10:E228. [PMID: 30966263 PMCID: PMC6415445 DOI: 10.3390/polym10030228] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 02/05/2018] [Accepted: 02/13/2018] [Indexed: 02/04/2023] Open
Abstract
Poly(vinylidene fluoride), PVDF, as one of important polymeric materials with extensively scientific interests and technological applications, shows five crystalline polymorphs with α, β, γ, δ and ε phases obtained by different processing methods. Among them, β phase PVDF presents outstanding electrical characteristics including piezo-, pyro-and ferroelectric properties. These electroactive properties are increasingly important in applications such as energy storage, spin valve devices, biomedicine, sensors and smart scaffolds. This article discusses the basic knowledge and character methods for PVDF fabrication and provides an overview of recent advances on the phase modification and recent applications of the β phase PVDF are reported. This study may provide an insight for the development and utilization for β phase PVDF nanofilms in future electronics.
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Affiliation(s)
- Liuxia Ruan
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Xiannian Yao
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Yufang Chang
- Computer Teaching and Researching Section, Shenyang Conservatory of Music, Shenyang 110818, China.
| | - Lianqun Zhou
- Suzhou Institute of Biomedical, Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China.
| | - Gaowu Qin
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Xianmin Zhang
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China.
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Gebrekrstos A, Sharma M, Bahl S, Madras G, Suwas S, Bose S. Process mediated polymorphism, crystallographic texture and structure-property correlation in crystalline/amorphous blends. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.01.075] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Osaka N, Minematsu Y, Tosaka M. Influence of lithium salt-induced phase separation on thermal behaviors of poly(vinylidene fluoride)/ionic liquid gels and pore/void formation by competition with crystallization. RSC Adv 2018; 8:40570-40580. [PMID: 35557906 PMCID: PMC9091358 DOI: 10.1039/c8ra08514e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 11/15/2018] [Indexed: 11/23/2022] Open
Abstract
The thermal behavior of poly(vinylidene fluoride)/1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide/lithium bis(trifluoromethylsulfonyl)amide (PVDF/[C2mim][TFSA]/LiTFSA) gels, prepared by cooling from the hot solution, was investigated with various concentrations of LiTFSA (CLiTFSA). The peak melting temperature (Tm) of the gels shifted toward higher temperatures with increased CLiTFSA. However, the thickness of lamellar crystal was found to decrease with the increase in CLiTFSA, which meant that the increase in Tm was not caused by the thickening of lamellar crystal. Furthermore, we found the appearance of domains above Tm in the high CLiTFSA region (≥20 wt%), which was a lithium ion-rich phase caused by the phase separation. Therefore, it is considered on the basis of Nishi–Wang equation that an increase in the interaction parameter with increasing CLiTFSA toward the phase separation increased the Tm. The phase-separated domains competed with the subsequent crystallization, which resulted in the formation of micrometer-sized pores and nanometer-sized voids in the spherulites. Spectral measurements revealed that PVDF was not specifically solvated in the solution state above the crystallization temperature, while [TFSA]− anion formed a complex with lithium ion irrespective of the PVDF content. These results led to the consideration that an increase in the interaction parameter might be caused by the strong interaction between lithium ion and [TFSA]− anion to form the complex, which would also lower the interaction between PVDF and [TFSA]− anion. Lithium salt-induced phase separation on thermal behaviors of PVDF/ionic liquid gels and pore/void structures formation by competition with crystallization.![]()
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Affiliation(s)
- Noboru Osaka
- Department of Chemistry
- Faculty of Science
- Okayama University of Science
- Okayama 700-0005
- Japan
| | - Yuichi Minematsu
- Department of Chemistry
- Faculty of Science
- Okayama University of Science
- Okayama 700-0005
- Japan
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Yang JH, Xiao YJ, Yang CJ, Li ST, Qi XD, Wang Y. Multifunctional poly(vinylidene fluoride) nanocomposites via incorporation of ionic liquid coated carbon nanotubes. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2017.11.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Towards Flexible Dielectric Materials with High Dielectric Constant and Low Loss: PVDF Nanocomposites with both Homogenously Dispersed CNTs and Ionic Liquids Nanodomains. Polymers (Basel) 2017; 9:polym9110562. [PMID: 30965866 PMCID: PMC6418540 DOI: 10.3390/polym9110562] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 10/16/2017] [Accepted: 10/26/2017] [Indexed: 11/29/2022] Open
Abstract
Flexible dielectric materials with high dielectric constant and low loss have attracted significant attention. In this work, we fabricated novel polymer-based nanocomposites with both homogeneously dispersed conductive nanofillers and ion-conductive nanodomains within a polymer matrix. An unsaturated ionic liquid (IL), 1-vinyl-3-ethylimidazolium tetrafluoroborate ([VEIM][BF4]), was first coated on the surface of multi-walled carbon nanotubes (CNTs) by the mechanical grinding. The ILs coated CNTs were then well dispersed in poly(vinylidene fluoride) (PVDF) matrix by melt-blending. The ILs on the surface of CNTs were subsequently grafted onto the PVDF chains by electron beam irradiation (EBI). The formed ILs grafted PVDF (PVDF-g-IL) finally aggregated into ionic nanodomains with the size of 20–30 nm in the melt state. Therefore, novel PVDF nanocomposites with both homogenously dispersed CNTs and ionic nanodomains were achieved. Both carbon nanotubes and ionic nanodomains contributed to the enhancement of the dielectric constant of PVDF significantly. At the same time, such homogeneously dispersed CNTs along with the confined ions in the nandomains decreased current leakage effectively and thus led to the low dielectric loss. The final PVDF nanocomposites exhibited high dielectric constant, low dielectric loss and good flexibility, which may be promising for applications in soft/flexible devices.
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Roohi H, Ghauri K, Salehi R. Non-covalent green functionalization of boron nitride nanotubes with tunable aryl alkyl ionic liquids: A quantum chemical approach. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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