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All-Polymer Piezo-Composites for Scalable Energy Harvesting and Sensing Devices. Molecules 2022; 27:molecules27238524. [PMID: 36500619 PMCID: PMC9741343 DOI: 10.3390/molecules27238524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/08/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022] Open
Abstract
Silicone elastomer composites with piezoelectric properties, conferred by incorporated polyimide copolymers, with pressure sensors similar to human skin and kinetic energy harvester capabilities, were developed as thin film (<100 micron thick) layered architecture. They are based on polymer materials which can be produced in industrial amounts and are scalable for large areas (m2). The piezoelectric properties of the tested materials were determined using a dynamic mode of piezoelectric force microscopy. These composite materials bring together polydimethylsiloxane polymers with customized poly(siloxane-imide) copolymers (2−20 wt% relative to siloxanes), with siloxane segments inserted into the structure to ensure the compatibility of the components. The morphology of the materials as free-standing films was studied by SEM and AFM, revealing separated phases for higher polyimide concentration (10, 20 wt%). The composites show dielectric behavior with a low loss (<10−1) and a relative permittivity superior (3−4) to pure siloxane within a 0.1−106 Hz range. The composite in the form of a thin film can generate up to 750 mV under contact with a 30 g steel ball dropped from 10 cm high. This capability to convert a pressure signal into a direct current for the tested device has potential for applications in self-powered sensors and kinetic energy-harvesting applications. Furthermore, the materials preserve the known electromechanical properties of pure polysiloxane, with lateral strain actuation values of up to 6.2% at 28.9 V/μm.
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Cazacu M, Dascalu M, Stiubianu GT, Bele A, Tugui C, Racles C. From passive to emerging smart silicones. REV CHEM ENG 2022. [DOI: 10.1515/revce-2021-0089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Amassing remarkable properties, silicones are practically indispensable in our everyday life. In most classic applications, they play a passive role in that they cover, seal, insulate, lubricate, water-proof, weather-proof etc. However, silicone science and engineering are highly innovative, seeking to develop new compounds and materials that meet market demands. Thus, the unusual properties of silicones, coupled with chemical group functionalization, has allowed silicones to gradually evolve from passive materials to active ones, meeting the concept of “smart materials”, which are able to respond to external stimuli. In such cases, the intrinsic properties of polysiloxanes are augmented by various chemical modifications aiming to attach reactive or functional groups, and/or by engineering through proper cross-linking pattern or loading with suitable fillers (ceramic, magnetic, highly dielectric or electrically conductive materials, biologically active, etc.), to add new capabilities and develop high value materials. The literature and own data reflecting the state-of-the art in the field of smart silicones, such as thermoplasticity, self-healing ability, surface activity, electromechanical activity and magnetostriction, thermo-, photo-, and piezoresponsivity are reviewed.
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Affiliation(s)
- Maria Cazacu
- Department of Inorganic Polymers , “Petru Poni” Institute of Macromolecular Chemistry , Aleea Gr. Ghica Voda 41A , 700487 Iasi , Romania
| | - Mihaela Dascalu
- Department of Inorganic Polymers , “Petru Poni” Institute of Macromolecular Chemistry , Aleea Gr. Ghica Voda 41A , 700487 Iasi , Romania
| | - George-Theodor Stiubianu
- Department of Inorganic Polymers , “Petru Poni” Institute of Macromolecular Chemistry , Aleea Gr. Ghica Voda 41A , 700487 Iasi , Romania
| | - Adrian Bele
- Department of Inorganic Polymers , “Petru Poni” Institute of Macromolecular Chemistry , Aleea Gr. Ghica Voda 41A , 700487 Iasi , Romania
| | - Codrin Tugui
- Department of Inorganic Polymers , “Petru Poni” Institute of Macromolecular Chemistry , Aleea Gr. Ghica Voda 41A , 700487 Iasi , Romania
| | - Carmen Racles
- Department of Inorganic Polymers , “Petru Poni” Institute of Macromolecular Chemistry , Aleea Gr. Ghica Voda 41A , 700487 Iasi , Romania
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Bele A, Dascalu M, Tugui C, Farcas A. Silicone elastomers with improved electro-mechanical performance using slide-ring polymers. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03051-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bizhani H, Katbab AA, Maroufkhani M, Verdejo R. Physical and mechanical properties of hybridized elastomeric foam based on ethylene-propylene-diene-monomer, multiwall carbon nanotube, and barium titanate. J CELL PLAST 2022. [DOI: 10.1177/0021955x221085194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The use of hybrid fillers in rubbers can provide additional benefits to rubber foams compared to individual micro- or nano-scale particles due to an optimum packaging and synergic effects. The present work reports the development of vulcanized ethylene-propylene-diene-monomer nanocomposite hybrid foams filled with barium titanate and multiwall carbon nanotube (BT/MWCNT), prepared via a scalable protocol. The developed foams presented a high shear-thinning behavior, suggesting the formation of a 3D interconnected physical network of MWCNT within the polymer matrix. This network resulted in a notable improvement of the mechanical properties under tension and compression with increasing of MWCNT content. Also, the incorporation of MWCNT and BT enhanced thermal stability and thermal conductivity. Meanwhile, BT did not show any influence on the measured physical properties, due to the lack of interaction between BT and the EPDM matrix.
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Affiliation(s)
- Hasti Bizhani
- Institute of Polymer Science and Technology (ICTP-CSIC), Juan de la Cierva 3, Madrid, 28006, Spain
- Department of Polymer Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Ali Asghar Katbab
- Department of Polymer Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Mahshid Maroufkhani
- Department of Materials, Chemistry and Polymer Engineering, Buin Zahra Technical University, Buin Zahra, Qazvin, Iran
| | - Raquel Verdejo
- Institute of Polymer Science and Technology (ICTP-CSIC), Juan de la Cierva 3, Madrid, 28006, Spain
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Bele A, Dascalu M, Tugui C, Stiubianu G, Varganici C, Racles C, Cazacu M, Skov AL. Soft silicone elastomers exhibiting large actuation strains. J Appl Polym Sci 2022. [DOI: 10.1002/app.52261] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Adrian Bele
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Grigore Ghica Voda Alley, 41 A Iasi Romania
| | - Mihaela Dascalu
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Grigore Ghica Voda Alley, 41 A Iasi Romania
| | - Codrin Tugui
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Grigore Ghica Voda Alley, 41 A Iasi Romania
| | - George‐Theodor Stiubianu
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Grigore Ghica Voda Alley, 41 A Iasi Romania
| | - Cristian‐Dragos Varganici
- Centre of Advanced Research in Bionanoconjugates and Biopolymers “Petru Poni” Institute of Macromolecular Chemistry Grigore Ghica Voda Alley, 41 A Iasi Romania
| | - Carmen Racles
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Grigore Ghica Voda Alley, 41 A Iasi Romania
| | - Maria Cazacu
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Grigore Ghica Voda Alley, 41 A Iasi Romania
| | - Anne Ladegaard Skov
- Department of Chemical and Biochemical Engineering Danish Polymer Centre, Technical University of Denmark Kgs. Lyngby Denmark
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Composite Materials Based on Iron Oxide Nanoparticles and Polyurethane for Improving the Quality of MRI. Polymers (Basel) 2021; 13:polym13244316. [PMID: 34960867 PMCID: PMC8707354 DOI: 10.3390/polym13244316] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/25/2021] [Accepted: 12/03/2021] [Indexed: 11/26/2022] Open
Abstract
Polyether urethane (PU)-based magnetic composite materials, containing different types and concentrations of iron oxide nanostructures (Fe2O3 and Fe3O4), were prepared and investigated as a novel composite platform that could be explored in different applications, especially for the improvement of the image quality of MRI investigations. Firstly, the PU structure was synthetized by means of a polyaddition reaction and then hematite (Fe2O3) and magnetite (Fe3O4) nanoparticles were added to the PU matrices to prepare magnetic nanocomposites. The type and amount of iron oxide nanoparticles influenced its structural, morphological, mechanical, dielectric, and magnetic properties. Thus, the morphology and wettability of the PU nanocomposites surfaces presented different behaviours depending on the amount of the iron oxide nanoparticles embedded in the matrices. Mechanical, dielectric, and magnetic properties were enhanced in the composites’ samples when compared with pristine PU matrix. In addition, the investigation of in vitro cytocompatibility of prepared PU nanocomposites showed that these samples are good candidates for biomedical applications, with cell viability levels in the range of 80–90%. Considering all the investigations, we can conclude that the addition of magnetic particles introduced additional properties to the composite, which could significantly expand the functionality of the materials developed in this work.
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Siloxane Matrix Molecular Weight Influences the Properties of Nanocomposites Based on Metal Complexes and Dielectric Elastomer. MATERIALS 2021; 14:ma14123352. [PMID: 34204349 PMCID: PMC8234613 DOI: 10.3390/ma14123352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/02/2021] [Accepted: 06/05/2021] [Indexed: 12/12/2022]
Abstract
Siloxane-based elastomers are some of the most sought-after materials for the construction of actuators and equipment for energy harvesting devices. This article focuses on changes of the mechanical (breaking stress, breaking strain, Young's modulus) and dielectric properties for elastomers prepared with silicones, induced by the variation of molecular weight of the matrix, with three different silicone polymers having 60,000 g/mol, 150,000 g/mol, and 450,000 g/mol (from GPC measurements). Multiple siloxane elastomers were crosslinked with methyltriacetoxysilane using the sol-gel route. The dielectric permittivity values of the elastomers were also enhanced with two different complex structures containing siloxane bond and 3d transition metals as filler materials for polydimethylsiloxane polymers with various molecular weights. The dielectric spectroscopy tests demonstrated a small decrease (5%) for the values of the dielectric permittivity in relation to increased molecular weight of the siloxane polymer, both for samples prepared with pure polymer and for samples with metal complexes. The samples of nanocomposites showed a >50% increase of dielectric permittivity values relative to samples prepared of pure siloxane elastomer. The thermal tests demonstrated that the nanocomposites retained thermal stability similar with samples prepared of pure siloxane elastomer. The behavior under controlled conditions of humidity showed a trend of increased water vapor sorption with increasing molecular weight but an overall hydrophobic stable character of nanocomposites.
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Cazacu M, Racles C, Zaltariov MF, Dascalu M, Bele A, Tugui C, Bargan A, Stiubianu G. From Amorphous Silicones to Si-Containing Highly Ordered Polymers: Some Romanian Contributions in the Field. Polymers (Basel) 2021; 13:polym13101605. [PMID: 34065717 PMCID: PMC8157024 DOI: 10.3390/polym13101605] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/12/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
Polydimethylsiloxane (PDMS), in spite of its well-defined helical structure, is an amorphous fluid even at extremely high molecular weights. The cause of this behavior is the high flexibility of the siloxane backbone and the lack of intermolecular interactions attributed to the presence of methyl groups. These make PDMS incompatible with almost any organic or inorganic component leading to phase separation in siloxane-siloxane copolymers containing blocks with polar organic groups and in siloxane-organic copolymers, where dimethylsiloxane segments co-exist with organic ones. Self-assembly at the micro- or nanometric scale is common in certain mixed structures, including micelles, vesicles, et cetera, manifesting reversibly in response to an external stimulus. Polymers with a very high degree of ordering in the form of high-quality crystals were obtained when siloxane/silane segments co-exist with coordinated metal blocks in the polymer chain. While in the case of coordination of secondary building units (SBUs) with siloxane ligands 1D chains are formed; when coordination is achieved in the presence of a mixture of ligands, siloxane and organic, 2D structures are formed in most cases. The Romanian research group's results regarding these aspects are reviewed: from the synthesis of classic, amorphous silicone products, to their adaptation for use in emerging fields and to new self-assembled or highly ordered structures with properties that create perspectives for the use of silicones in hitherto unexpected areas.
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Affiliation(s)
- Maria Cazacu
- Correspondence: ; Tel.: +40-232-217-454; Fax: +40-232-211-299
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Kumar A, Ahmad D, Patra K, Hossain M. Enhancement of electromechanical properties of natural rubber by adding barium titanate filler: An electro‐mechanical study. J Appl Polym Sci 2021. [DOI: 10.1002/app.50991] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ajeet Kumar
- Department of Mechanical Engineering Indian Institute of Technology Patna Patna India
| | - Dilshad Ahmad
- Department of Mechanical Engineering Indian Institute of Technology Patna Patna India
| | - Karali Patra
- Department of Mechanical Engineering Indian Institute of Technology Patna Patna India
| | - Mokarram Hossain
- Zienkiewicz Centre for Computational Engineering College of Engineering, Bay Campus, Swansea University Swansea UK
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11
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Yao HY, Lin YW, Chang TH. Dielectric Properties of BaTiO 3-Epoxy Nanocomposites in the Microwave Regime. Polymers (Basel) 2021; 13:polym13091391. [PMID: 33922913 PMCID: PMC8123311 DOI: 10.3390/polym13091391] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 11/16/2022] Open
Abstract
We synthesized BaTiO3–epoxy nanocomposites (particle size < 100 nm) with volume fractions up to 25 vol. %, whose high-frequency complex permittivity was characterized from 8.2 to 12.5 GHz. The maximum dielectric constant approaches 9.499 with an acceptable loss tangent of 0.113. The dielectric loss gradually saturates when the particle concentration is higher than 15 vol. %. This special feature is an important key to realizing high-k and low-loss nanocomposites. By comparing the theoretical predictions and the experimental data, four applicable effective-medium models are suggested. The retrieved dielectric constant (loss tangent) of 100-nm BaTiO3 nanopowder is in the range of 50–90 (0.1–0.15) at 8.2–12.5 GHz, exhibiting weak frequency dispersion. Two multilayer microwave devices—total reflection and antireflection coatings—are designed based on the fabricated nanocomposites. Both devices show good performance and allow broadband operation.
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12
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Racles C, Asandulesa M, Tiron V, Tugui C, Vornicu N, Ciubotaru BI, Mičušík M, Omastová M, Vasiliu AL, Ciomaga C. Elastic composites with PDMS matrix and polysulfone-supported silver nanoparticles as filler. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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13
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The Phosphate-Based Composite Materials Filled with Nano-Sized BaTiO 3 and Fe 3O 4: Toward the Unfired Multiferroic Materials. MATERIALS 2020; 14:ma14010133. [PMID: 33396932 PMCID: PMC7795974 DOI: 10.3390/ma14010133] [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: 11/27/2020] [Revised: 12/18/2020] [Accepted: 12/27/2020] [Indexed: 11/16/2022]
Abstract
The composite material filled with nano-sized BaTiO3 and Fe3O4 was designed and studied. The aluminium phosphate ceramics was used as a matrix. The XRD analysis demonstrates only the crystalline structure of the fillers used. The thermogravimetric analysis proves the thermal stability of the composites up to 950 K. The Maxwell-Wagner relaxation was observed in the dielectric spectra of the investigated composites. The dielectric spectroscopy proves the close contact between the nanoparticles with the different ferroic ordering. The phosphate-based composites have been proved to be a prospective candidate for the multiphase multiferroic materials design and development.
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Lane S, Barrett-Snyder K, Lazarus N, Alberts WCK, Hanrahan B. Vibration sensing the mammalian way: an artificial Pacinian corpuscle. BIOINSPIRATION & BIOMIMETICS 2020; 15:046001. [PMID: 32106099 DOI: 10.1088/1748-3190/ab7ab6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A vibration sensor is presented mimicking the structure of the Pacinian corpuscle. A multi-step casting process is used to create a 5 mm diameter sensor with a liquid metal core, elastomer dielectric, and graphite counter electrode creating a spherical capacitive sensing element with sensitivities on the order of 10 Δ pF/mm-1. A model for the capacitance change of the spherical capacitor as it is formed is developed and its findings support the sensitivities observed. Various elastomer dielectric compositions with integrated barium titanate nanoparticles are tested to increase the dielectric constant. The biological acoustic filter within the corpuscle is mimicked using alternating cast layers of oligomers and elastomers around the spherical sensor element. Vibration sensing is characterized over the low frequency range of 10-300 Hz and the minimum detectable sensitivity is found to be 1 µm with a low power requirement of 7 mW. The artificial Pacinian corpuscle has potential applications in tactile sensing and seismic monitoring devices.
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Affiliation(s)
- Susan Lane
- U S Army Research Laboratory, Adelphi, MD, United States of America
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15
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Haghiashtiani G, Habtour E, Park SH, Gardea F, McAlpine MC. 3D Printed Electrically-Driven Soft Actuators. EXTREME MECHANICS LETTERS 2018; 21:1-8. [PMID: 32596434 PMCID: PMC7319180 DOI: 10.1016/j.eml.2018.02.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Soft robotics is an emerging field enabled by advances in the development of soft materials with properties commensurate to their biological counterparts, for the purpose of reproducing locomotion and other distinctive capabilities of active biological organisms. The development of soft actuators is fundamental to the advancement of soft robots and bio-inspired machines. Among the different material systems incorporated in the fabrication of soft devices, ionic hydrogel-elastomer hybrids have recently attracted vast attention due to their favorable characteristics, including their analogy with human skin. Here, we demonstrate that this hybrid material system can be 3D printed as a soft dielectric elastomer actuator (DEA) with a unimorph configuration that is capable of generating high bending motion in response to an applied electrical stimulus. We characterized the device actuation performance via applied (i) ramp-up electrical input, (ii) cyclic electrical loading, and (iii) payload masses. A maximum vertical tip displacement of 9.78 ± 2.52 mm at 5.44 kV was achieved from the tested 3D printed DEAs. Furthermore, the nonlinear actuation behavior of the unimorph DEA was successfully modeled using analytical energetic formulation and a finite element method (FEM).
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Affiliation(s)
- Ghazaleh Haghiashtiani
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. SE, Minneapolis, MN 55455, USA
| | - Ed Habtour
- U.S. Army Research Laboratory, Aberdeen Proving Ground, MD 21005, USA
- Department of Applied Mechanics, University of Twente, Enschede, Netherlands
- The Netherlands Defence Academy, Den Helder, Netherlands
| | - Sung-Hyun Park
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. SE, Minneapolis, MN 55455, USA
| | - Frank Gardea
- U.S. Army Research Laboratory, Aberdeen Proving Ground, MD 21005, USA
| | - Michael C. McAlpine
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. SE, Minneapolis, MN 55455, USA
- Corresponding author
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Zaltariov MF, Bele A, Vasiliu L, Gradinaru L, Vornicu N, Racles C, Cazacu M. Assessment of chemicals released in the marine environment by dielectric elastomers useful as active elements in wave energy harvesters. JOURNAL OF HAZARDOUS MATERIALS 2018; 341:390-403. [PMID: 28806559 DOI: 10.1016/j.jhazmat.2017.07.068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 07/08/2017] [Accepted: 07/23/2017] [Indexed: 06/07/2023]
Abstract
A series of elastomers, either natural or synthetic (some of them commercial, while others prepared in the laboratory), suitable for use as active elements in devices for wave energy harvesting, were evaluated concerning their behavior and effects on the marine environment. In this aim, the elastomer films, initially evaluated regarding their aspect, structure, surface wettability, and tolerance of microorganisms growth, were immersed in synthetic seawater (SSW) within six months for assessing compounds released. There were analyzed the changes occurred both in the elastomers and salt water in which they were immersed. For this, water samples taken at set time intervals were analyzed by using a sequence of sensitive spectral techniques: UV-vis, IR, and in relevant cases 1H NMR and electrospray ionization mass spectrometry (ESI-MS), able to detect and identify organic compounds, while after six months, they were also investigated from the point of view of aspect, presence of metal traces, pH, and biological activity. The changes in aspect, structure and morphology of the dielectric films at the end of the dipping period were also evaluated by visual inspection, IR spectroscopy by using spectral subtraction method, and SEM-EDX technique.
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Affiliation(s)
- Mirela-Fernanda Zaltariov
- Inorganic Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Adrian Bele
- Inorganic Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Lavinia Vasiliu
- Inorganic Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Luiza Gradinaru
- Inorganic Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Nicoleta Vornicu
- Metropolitan Center of Research T.A.B.O.R, The Metropolitanate of Moldavia and Bukovina, Iasi, Romania
| | - Carmen Racles
- Inorganic Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Maria Cazacu
- Inorganic Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania.
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Erdem D, Bingham NS, Heiligtag FJ, Pilet N, Warnicke P, Vaz CAF, Shi Y, Buzzi M, Rupp JLM, Heyderman LJ, Niederberger M. Nanoparticle-Based Magnetoelectric BaTiO 3-CoFe 2O 4 Thin Film Heterostructures for Voltage Control of Magnetism. ACS NANO 2016; 10:9840-9851. [PMID: 27704780 DOI: 10.1021/acsnano.6b05469] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Multiferroic composite materials combining ferroelectric and ferromagnetic order at room temperature have great potential for emerging applications such as four-state memories, magnetoelectric sensors, and microwave devices. In this paper, we report an effective and facile liquid phase deposition route to create multiferroic composite thin films involving the spin-coating of nanoparticle dispersions of BaTiO3, a well-known ferroelectric, and CoFe2O4, a highly magnetostrictive material. This approach offers great flexibility in terms of accessible film configurations (co-dispersed as well as layered films), thicknesses (from 100 nm to several μm) and composition (5-50 wt % CoFe2O4 with respect to BaTiO3) to address various potential applications. A detailed structural characterization proves that BaTiO3 and CoFe2O4 remain phase-separated with clear interfaces on the nanoscale after heat treatment, while electrical and magnetic studies indicate the simultaneous presence of both ferroelectric and ferromagnetic order. Furthermore, coupling between these orders within the films is demonstrated with voltage control of the magnetism at ambient temperatures.
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Affiliation(s)
- Derya Erdem
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, 8093, Zurich, Switzerland
| | | | - Florian J Heiligtag
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, 8093, Zurich, Switzerland
| | | | | | | | | | | | | | | | - Markus Niederberger
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, 8093, Zurich, Switzerland
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Racles C, Cozan V, Bele A, Dascalu M. Polar silicones: structure-dielectric properties relationship. Des Monomers Polym 2016. [DOI: 10.1080/15685551.2016.1169381] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- Carmen Racles
- Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
| | - Vasile Cozan
- Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
| | - Adrian Bele
- Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
| | - Mihaela Dascalu
- Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
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Bele A, Stiubianu G, Vlad S, Tugui C, Varganici CD, Matricala L, Ionita D, Timpu D, Cazacu M. Aging behavior of the silicone dielectric elastomers in a simulated marine environment. RSC Adv 2016. [DOI: 10.1039/c5ra22780a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of silicone–barium titanate composites, designed as dielectric elastomer films to be used as active elements in wave energy conversion devices, were immersed in artificial sea water in pseudo-dynamic conditions to asses their aging behavior.
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Affiliation(s)
- A. Bele
- “Petru Poni” Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - G. Stiubianu
- “Petru Poni” Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - S. Vlad
- “Petru Poni” Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - C. Tugui
- “Petru Poni” Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - C. D. Varganici
- “Petru Poni” Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - L. Matricala
- “Petru Poni” Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - D. Ionita
- “Petru Poni” Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - D. Timpu
- “Petru Poni” Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - M. Cazacu
- “Petru Poni” Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
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20
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Tugui C, Cazacu M, Sacarescu L, Bele A, Stiubianu G, Ursu C, Racles C. Full silicone interpenetrating bi-networks with different organic groups attached to the silicon atoms. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.09.042] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Ehsan MA, Khaledi H, Pandikumar A, Huang NM, Arifin Z, Mazhar M. Dye sensitized solar cell applications of CdTiO3–TiO2 composite thin films deposited from single molecular complex. J SOLID STATE CHEM 2015. [DOI: 10.1016/j.jssc.2015.06.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Iacob M, Stiubianu G, Tugui C, Ursu L, Ignat M, Turta C, Cazacu M. Goethite nanorods as a cheap and effective filler for siloxane nanocomposite elastomers. RSC Adv 2015. [DOI: 10.1039/c5ra03765d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Composites based on PDMS and goethite nanorods are for the first time approached from the perspective of dielectric elastomers.
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Affiliation(s)
- M. Iacob
- “Petru Poni” Institute of Macromolecular Chemistry
- Iasi
- Romania
- Institute of Chemistry of ASM
- Chisinau 2028
| | - G. Stiubianu
- “Petru Poni” Institute of Macromolecular Chemistry
- Iasi
- Romania
| | - C. Tugui
- “Petru Poni” Institute of Macromolecular Chemistry
- Iasi
- Romania
| | - L. Ursu
- “Petru Poni” Institute of Macromolecular Chemistry
- Iasi
- Romania
| | - M. Ignat
- “Petru Poni” Institute of Macromolecular Chemistry
- Iasi
- Romania
| | - C. Turta
- “Petru Poni” Institute of Macromolecular Chemistry
- Iasi
- Romania
- Institute of Chemistry of ASM
- Chisinau 2028
| | - M. Cazacu
- “Petru Poni” Institute of Macromolecular Chemistry
- Iasi
- Romania
| |
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