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Carlin M, Kaur J, Ciobanu DZ, Song Z, Olsson M, Totu T, Gupta G, Peng G, González VJ, Janica I, Pozo VF, Chortarea S, Buljan M, Buerki-Thurnherr T, Rio Castillo AED, Thorat SB, Bonaccorso F, Tubaro A, Vazquez E, Prato M, Armirotti A, Wick P, Bianco A, Fadeel B, Pelin M. Hazard assessment of hexagonal boron nitride and hexagonal boron nitride reinforced thermoplastic polyurethane composites using human skin and lung cells. JOURNAL OF HAZARDOUS MATERIALS 2024; 473:134686. [PMID: 38788582 DOI: 10.1016/j.jhazmat.2024.134686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 05/14/2024] [Accepted: 05/20/2024] [Indexed: 05/26/2024]
Abstract
Hexagonal boron nitride (hBN) is an emerging two-dimensional material attracting considerable attention in the industrial sector given its innovative physicochemical properties. Potential risks are associated mainly with occupational exposure where inhalation and skin contact are the most relevant exposure routes for workers. Here we aimed at characterizing the effects induced by composites of thermoplastic polyurethane (TPU) and hBN, using immortalized HaCaT skin keratinocytes and BEAS-2B bronchial epithelial cells. The composite was abraded using a Taber® rotary abraser and abraded TPU and TPU-hBN were also subjected to photo-Fenton-mediated degradation mimicking potential weathering across the product life cycle. Cells were exposed to the materials for 24 h (acute exposure) or twice per week for 4 weeks (chronic exposure) and evaluated with respect to material internalization, cytotoxicity, and proinflammatory cytokine secretion. Additionally, comprehensive mass spectrometry-based proteomics and metabolomics (secretomics) analyses were performed. Overall, despite evidence of cellular uptake of the material, no significant cellular and/or protein expression profiles alterations were observed after acute or chronic exposure of HaCaT or BEAS-2B cells, identifying only few pro-inflammatory proteins. Similar results were obtained for the degraded materials. These results support the determination of hazard profiles associated with cutaneous and pulmonary hBN-reinforced polymer composites exposure.
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Affiliation(s)
- Michela Carlin
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Jasreen Kaur
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | | | - Zhengmei Song
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR3572, University of Strasbourg, ISIS, 67000 Strasbourg, France
| | - Magnus Olsson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Tiberiu Totu
- Laboratory for Particles-Biology Interactions, Federal Laboratory for Materials Science and Technology, (EMPA), St. Gallen, Switzerland; Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland; Department of Health Sciences and Technology, Eidgenössische Technische Hochschule Zürich (ETH), Zurich, Switzerland
| | - Govind Gupta
- Laboratory for Particles-Biology Interactions, Federal Laboratory for Materials Science and Technology, (EMPA), St. Gallen, Switzerland
| | - Guotao Peng
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Viviana Jehová González
- Regional Institute of Applied Scientific Research (IRICA), University of Castilla-La Mancha, Ciudad Real, Spain
| | - Iwona Janica
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR3572, University of Strasbourg, ISIS, 67000 Strasbourg, France
| | - Victor Fuster Pozo
- Laboratory for Particles-Biology Interactions, Federal Laboratory for Materials Science and Technology, (EMPA), St. Gallen, Switzerland
| | - Savvina Chortarea
- Laboratory for Particles-Biology Interactions, Federal Laboratory for Materials Science and Technology, (EMPA), St. Gallen, Switzerland
| | - Marija Buljan
- Laboratory for Particles-Biology Interactions, Federal Laboratory for Materials Science and Technology, (EMPA), St. Gallen, Switzerland; Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland
| | - Tina Buerki-Thurnherr
- Laboratory for Particles-Biology Interactions, Federal Laboratory for Materials Science and Technology, (EMPA), St. Gallen, Switzerland
| | | | | | | | - Aurelia Tubaro
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Ester Vazquez
- Regional Institute of Applied Scientific Research (IRICA), University of Castilla-La Mancha, Ciudad Real, Spain; Department of Organic Chemistry, Faculty of Science and Chemistry Technologies, University of Castilla-La Mancha, Ciudad Real, Spain
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy; Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Donostia-San Sebastian, Spain; Basque Foundation for Science (IKERBASQUE), Bilbao, Spain
| | - Andrea Armirotti
- Analytical Chemistry Facility, Italian Institute of Technology, Genoa, Italy
| | - Peter Wick
- Laboratory for Particles-Biology Interactions, Federal Laboratory for Materials Science and Technology, (EMPA), St. Gallen, Switzerland
| | - Alberto Bianco
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR3572, University of Strasbourg, ISIS, 67000 Strasbourg, France.
| | - Bengt Fadeel
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
| | - Marco Pelin
- Department of Life Sciences, University of Trieste, Trieste, Italy.
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Li F, Song N, Li X, Jirigalantu, Mi X, Sun C, Sun Y, Feng S, Wang G, Qiu J, Bayanheshig. Detection of microplastics via a confocal-microscope spatial-heterodyne Raman spectrometer with echelle gratings. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 313:124099. [PMID: 38513421 DOI: 10.1016/j.saa.2024.124099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/27/2024] [Accepted: 02/27/2024] [Indexed: 03/23/2024]
Abstract
Microplastic pollution has become a global environmental problem that cannot be ignored. Raman spectroscopy has been widely used for microplastics detection because it can be performed in real-time and is non-destructive. Conventional detection techniques have had weak signals and low signal-to-noise ratios (SNR). Here, an efficient and reliable detection method is demonstrated. Specifically, a confocal microscope combined with an echelle-grating spatial-heterodyne Raman spectrometer (CM-ESHRS) was constructed. The confocal microscopy and the characteristics of the echelle grating enabled high optical throughput, high SNR, high spectral resolution, and a wide spectral detection band. After spectral calibration, the resolution approached 0.67 cm-1, moreover, the spectral detection range for a single order was 1372.16 cm-1. We detected and analyzed nineteen kinds of microplastics, such as polyamide, polypropylene, and polymethylmethacrylate, and the main vibrational spectral bands were categorized. Compared with commercial dispersive spectrometers, CM-ESHRS has a higher optical throughput. In addition, we examined microplastics with various particle sizes, microplastics mixed in flour, and microplastic particles of different materials under mixed conditions, all of which yielded complete spectral information. Overall, CM-ESHRS exhibits good potential applications for the detection of microplastics.
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Affiliation(s)
- Fuguan Li
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China.
| | - Nan Song
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China.
| | - Xiaotian Li
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China
| | - Jirigalantu
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China
| | - Xiaotao Mi
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China
| | - Ci Sun
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China
| | - Yuqi Sun
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China.
| | - Shulong Feng
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China
| | - Geng Wang
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China
| | - Jun Qiu
- The Institute for Al International Governance of Tsinghua University, Beijing 100084, China.
| | - Bayanheshig
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China
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Encarnação T, Nicolau N, Ramos P, Silvestre E, Mateus A, de Carvalho TA, Gaspar F, Massano A, Biscaia S, Castro RAE, Nogueira BA, Singh P, Pacheco D, Patrício T, Fausto R, Sobral AJFN. Recycling Ophthalmic Lens Wastewater in a Circular Economy Context: A Case Study with Microalgae Integration. MATERIALS (BASEL, SWITZERLAND) 2023; 17:75. [PMID: 38203929 PMCID: PMC10779472 DOI: 10.3390/ma17010075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024]
Abstract
Water pollution poses a global threat to ecosystems and human health and is driven by the presence of various contaminants in wastewater, including nano- and microplastics. Despite the magnitude of this problem, the majority of global wastewater is released untreated into water bodies. To combat this issue, a multi-strategy approach is needed. This study explores a circular economy-based solution for treating emerging pollutants, particularly wastewater from ophthalmic spectacle lens production. Our approach integrates solid waste materials into polymeric and cement matrices while also utilising wastewater for microalgae cultivation. This innovative strategy focuses on biomass generation and economic valorisation. By adopting a circular economy model, we aim to transform environmental pollutants from wastewater into valuable organic products. A key component of our approach is the utilisation of microalgae, specifically Nannochloropsis sp., known for its high lipid content and resilience. This microalgae species serves as a promising biobased feedstock, supporting the production of innovative biobased products, such as biopolymers, for ophthalmic lens manufacturing. Our interdisciplinary approach combines microalgae technology, analytical chemistry, cement production, and polymer processing to develop a sustainable circular economy model that not only addresses environmental concerns, but also offers economic benefits. This study underscores the potential of harnessing high-value products from waste streams and underscores the importance of circular economy principles in tackling pollution and resource challenges.
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Affiliation(s)
- Telma Encarnação
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
| | - Nadia Nicolau
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
| | - Pedro Ramos
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
- Opticentro, 2460-071 Alcobaça, Portugal
| | - Elsa Silvestre
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
- Opticentro, 2460-071 Alcobaça, Portugal
| | - Artur Mateus
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Tomás Archer de Carvalho
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Florindo Gaspar
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Anabela Massano
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Sara Biscaia
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Ricardo A. E. Castro
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
| | - Bernardo A. Nogueira
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
| | - Poonam Singh
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
| | - Diana Pacheco
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Tatiana Patrício
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Rui Fausto
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
- Faculty of Sciences and Letters, Department of Physics, Istanbul Kultur University, Ataköy Campus, Bakirköy, Istanbul 34156, Turkey
| | - Abílio J. F. N. Sobral
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
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Stroe M, Burlanescu T, Paraschiv M, Lőrinczi A, Matei E, Ciobanu R, Baibarac M. Optical and Structural Properties of Composites Based on Poly(urethane) and TiO 2 Nanowires. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16041742. [PMID: 36837374 PMCID: PMC9959890 DOI: 10.3390/ma16041742] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/17/2023] [Accepted: 02/19/2023] [Indexed: 05/27/2023]
Abstract
This article's objective is the synthesis of new composites based on thermoplastic polyurethane (TPU) and TiO2 nanowires (NWs) as free-standing films, highlighting their structural and optical properties. The free-standing TPU-TiO2 NW films were prepared by a wet chemical method accompanied by a thermal treatment at 100 °C for 1 h, followed by air-drying for 2 h. X-ray diffraction (XRD) studies indicated that the starting commercial TiO2 NW sample contains TiO2 tetragonal anatase (A), cubic Ti0.91O (C), and orthorhombic Ti2O3 (OR), as well as monoclinic H2Ti3O7 (M). In the presence of TPU, an increase in the ratio between the intensities of the diffraction peaks at 43.4° and 48° belonging to the C and A phases of titanium dioxide, respectively, is reported. The increase in the intensity of the peak at 43.4° is explained to be a consequence of the interaction of TiO2 NWs with PTU, which occurs when the formation of suboxides takes place. The variation in the ratio of the absorbance of the IR bands peaked at 765-771 cm-1 and 3304-3315 cm-1 from 4.68 to 4.21 and 3.83 for TPU and the TPU-TiO2 NW composites, respectively, with TiO2 NW concentration equal to 2 wt.% and 17 wt.%, indicated a decrease in the higher-order aggregates of TPU with a simultaneous increase in the hydrogen bonds established between the amide groups of TPU and the oxygen atoms of TiO2 NWs. The decrease in the ratio of the intensity of the Raman lines peaked at 658 cm-1 and 635 cm-1, which were assigned to the vibrational modes Eg in TiO2 A and Eg in H2Ti3O7 (ITiO2-A/IH2Ti3O7), respectively, from 3.45 in TiO2 NWs to 0.94-0.96 in the TPU-TiO2 NW composites, which indicates that the adsorption of TPU onto TiO2 NWs involves an exchange reaction of TPU in the presence of TiO2 NWs, followed by the formation of new hydrogen bonds between the -NH- of the amide group and the oxygen atoms of TixO2x-mn, Ti2O3, and Ti0.91O. Photoluminescence (PL) studies highlighted a gradual decrease in the intensity of the TPU emission band, which is situated in the spectral range 380-650 nm, in the presence of TiO2 NW. After increasing the TiO2 NW concentration in the TPU-TiO2 NW composite mass from 0 wt.% to 2 wt.% and 17 wt.%, respectively, a change in the binding angle of the TPU onto the TiO2 NW surface from 12.6° to 32° and 45.9°, respectively, took place.
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Affiliation(s)
- Malvina Stroe
- National Institute of Materials Physics, P.O. Box MG-7, Bucharest, Atomistilor Street 405A, 077125 Bucharest, Romania
| | - Teodora Burlanescu
- National Institute of Materials Physics, P.O. Box MG-7, Bucharest, Atomistilor Street 405A, 077125 Bucharest, Romania
| | - Mirela Paraschiv
- National Institute of Materials Physics, P.O. Box MG-7, Bucharest, Atomistilor Street 405A, 077125 Bucharest, Romania
| | - Adam Lőrinczi
- National Institute of Materials Physics, P.O. Box MG-7, Bucharest, Atomistilor Street 405A, 077125 Bucharest, Romania
| | - Elena Matei
- National Institute of Materials Physics, P.O. Box MG-7, Bucharest, Atomistilor Street 405A, 077125 Bucharest, Romania
| | - Romeo Ciobanu
- SC All Green SRL, 8 George Cosbuc Str., 700470 Iasi, Romania
- Electrical Engineering Faculty, Gheorghe Asachi Technical University of Iasi, Dimitrie Mangeron Bd. 67, 700050 Iasi, Romania
| | - Mihaela Baibarac
- National Institute of Materials Physics, P.O. Box MG-7, Bucharest, Atomistilor Street 405A, 077125 Bucharest, Romania
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Pham AD, Tao QB, Nam PC. Optimizing the Superhydrophobicity of the Composite PDMS/PUA Film Produced by a R2R System. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c04491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Anh-Duc Pham
- Faculty of Mechanical Engineering, The University of Danang─University of Science and Technology, Danang City 550000, Vietnam
| | - Quang Bang Tao
- Faculty of Mechanical Engineering, The University of Danang─University of Science and Technology, Danang City 550000, Vietnam
| | - Pham Cam Nam
- Faculty of Chemical Engineering, The University of Danang─University of Science and Technology, Danang City 550000, Vietnam
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Blaj DA, Diaconu AD, Harabagiu V, Peptu C. Polyethylene Glycol-Isophorone Diisocyanate Polyurethane Prepolymers Tailored Using MALDI MS. MATERIALS (BASEL, SWITZERLAND) 2023; 16:821. [PMID: 36676558 PMCID: PMC9862538 DOI: 10.3390/ma16020821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 01/11/2023] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
The reaction of diols with isocyanates, leading to mono-functional and di-functional prepolymers may be investigated using various characterization methods which show the overall conversion of isocyanate monomers. On the other hand, matrix-assisted laser desorption ionization mass spectrometry (MALDI MS) polymer characterization can be employed to identify the monomer units, the end-group functionalities, molecular weight averages, and to determine the copolymer sequence. Herein, we focus on prepolymer synthesis using isophorone diisocyanate (IPDI), a widely used diisocyanate for prepolymers preparation, especially in waterborne polyurethane materials. Thus, the reaction between polyethylene glycol diol and IPDI was in-depth investigated by mass spectrometry to determine the influence of the reaction parameters on the prepolymer's structure. The relative content of the different functional oligomer species at given reaction times was determined in the reaction mixture. More specifically, the offline analysis revealed the influence of reaction parameters such as reaction temperature, the concentration of reactants, and the amount of dibutyltin dilaurate catalyst. The established MALDI MS analysis involved measurements of samples, first, directly collected from the reaction mixture and secondly, following derivatization with methanol. The obtained results revealed the effects of reaction parameters on the functionalization reaction with isocyanates, allowing to achieve a better reaction control.
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Kim JK, Krishna-Subbaiah N, Wu Y, Ko J, Shiva A, Sitti M. Enhanced Flexible Mold Lifetime for Roll-to-Roll Scaled-Up Manufacturing of Adhesive Complex Microstructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2207257. [PMID: 36271730 DOI: 10.1002/adma.202207257] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Various functional complex 3D patterned surfaces with micro- or nanostructures have been developed and their superior performances over non-patterned smooth surfaces proven. However, it is challenging to mass-produce such complex micro-/nanopatterned surfaces, which limits their commercialization drastically. Although roll-to-roll (R2R) manufacturing using flexible molds has been implemented for mass-production of such functional surfaces, the poor mold repeatability issue has not been resolved yet. Here, a strategy to significantly improve the repeatability of the micropatterned flexible silicone molds over 1000 cycles against highly adhesive polyurethane acrylates (PUAs) in UV light curing based R2R systems by using a two-step curing process is reported. The mold repeatability is drastically increased from 10s of cycles to over 1000 cycles through the proposed strategy in spite of the complicated 3D undercut geometry and high tackiness of the microstructure. This two-step process would enable scaled-up production of micro-/nanostructured adhesives, such as gecko-inspired microfiber adhesives as demonstrated in this study, as well as various other functional micro-/nanostructured surfaces by enhancing the flexible mold lifetime.
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Affiliation(s)
- Jae-Kang Kim
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
| | - Nagaraj Krishna-Subbaiah
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
| | - Yingdan Wu
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
| | - Jongkuk Ko
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
| | - Anitha Shiva
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
| | - Metin Sitti
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
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8
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Chang C, Feng LF, Gu XP, Zhang CL, Dai LK, Chen X, Hu GH. In Situ Raman Spectroscopy Real-Time Monitoring of a Polyester Polymerization Process for Subsequent Process Optimization and Control. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Cheng Chang
- State Key Laboratory of Chemical Engineering, College of Chemical & Biological Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
| | - Lian-Fang Feng
- State Key Laboratory of Chemical Engineering, College of Chemical & Biological Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
- Institute of Zhejiang University − Quzhou, Quzhou324000, Zhejiang, China
| | - Xue-Ping Gu
- State Key Laboratory of Chemical Engineering, College of Chemical & Biological Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
- Institute of Zhejiang University − Quzhou, Quzhou324000, Zhejiang, China
| | - Cai-Liang Zhang
- State Key Laboratory of Chemical Engineering, College of Chemical & Biological Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
- Institute of Zhejiang University − Quzhou, Quzhou324000, Zhejiang, China
| | - Lian-Kui Dai
- College of Control Science & Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
| | - Xi Chen
- College of Control Science & Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
- National Center for International Research on Quality-Targeted Process Optimization and Control, Zhejiang University, Hangzhou310027, Zhejiang, China
| | - Guo-Hua Hu
- Laboratory of Reactions and Process Engineering (LRGP, UMR CNRS 7274), University of Lorraine, CNRS, 1 Rue Grandville, 54000Nancy, France
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Roscioli JD, Desanker M, Patankar KA, Grzesiak A, Chen X. Simultaneous High-Throughput Monitoring of Urethane Reactions Using Near-Infrared Hyperspectral Imaging. APPLIED SPECTROSCOPY 2022; 76:1329-1334. [PMID: 35712891 DOI: 10.1177/00037028221110914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
High-throughput (HTP) research is becoming more widely utilized due to its advantages in rapid screening of large parameter space. When HTP is used for reaction screening, often only the end products are analyzed by off-line techniques, leaving behind valuable process information. Information-rich spectroscopy tools have remained under-utilized in HTP workflows. In this study, near-infrared (NIR) hyperspectral imaging (HSI) is demonstrated to be a versatile and accurate tool that can simultaneously monitor multiple reactions, opening up future opportunities to maximize information extraction from such HTP reaction screening experiments. Model urethane reactions are used here to demonstrate the concept, and the general approach can be widely applied to any reactions involving NIR-active functional groups. The fast speed and accurate chemical information made possible by NIR HSI are expected be another important addition to the toolkit of HTP research.
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10
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Zuliani A, Chelazzi D, Mastrangelo R, Giorgi R, Baglioni P. Adsorption kinetics of acetic acid into ZnO/castor oil-derived polyurethanes. J Colloid Interface Sci 2022; 632:74-86. [DOI: 10.1016/j.jcis.2022.11.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 11/09/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022]
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11
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Junik K, Lesiuk G, Duda S, Jamroziak K, Błażejewski W, Zielonka P, Socha T, Denisiewicz A, Kula K, Szczurek A. Constitutive Law Identification and Fatigue Characterization of Rigid PUR Elastomers 80 ShA and 90 ShA. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15196745. [PMID: 36234086 PMCID: PMC9572780 DOI: 10.3390/ma15196745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/22/2022] [Accepted: 09/22/2022] [Indexed: 05/14/2023]
Abstract
This paper presents the results of a study of polyurethane rigid (PUR) elastomers in terms of the constitutive law identification, and analyses the effect of polyurethane elastomers' hardness on fatigue properties. The research objects were PUR materials based on 4,4'-diphenylmethane diisocyanate (MDI) with the hardness of 80 ShA and 90 ShA, typically used in various industrial applications. Based on the performed experimental campaign under static and cyclic loading, the constitutive model proposed by Ogden is most appropriate. In addition, a hybrid numerical-experimental analysis (using FEM-DIC) of diabolo specimens' behaviour is carried out in fatigue tests. Based on the performed fatigue test, it is worth noting that the energy approach describes the fatigue process synonymously compared to the displacement or strain approach. Finally, simple fatigue characteristics were analyzed and statistically validated for both PUR material configurations.
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Affiliation(s)
- Krzysztof Junik
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50370 Wrocław, Poland
| | - Grzegorz Lesiuk
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50370 Wrocław, Poland
- Correspondence: ; Tel.: +48-713-204-216
| | - Szymon Duda
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50370 Wrocław, Poland
| | - Krzysztof Jamroziak
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50370 Wrocław, Poland
| | - Wojciech Błażejewski
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50370 Wrocław, Poland
| | - Paweł Zielonka
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50370 Wrocław, Poland
| | - Tomasz Socha
- The Faculty of Civil Engineering, Architecture and Environmental Engineering, University of Zielona Góra, ul. prof. Z. Szafrana 1, 65516 Zielona Góra, Poland
| | - Arkadiusz Denisiewicz
- The Faculty of Civil Engineering, Architecture and Environmental Engineering, University of Zielona Góra, ul. prof. Z. Szafrana 1, 65516 Zielona Góra, Poland
| | - Krzysztof Kula
- The Faculty of Civil Engineering, Architecture and Environmental Engineering, University of Zielona Góra, ul. prof. Z. Szafrana 1, 65516 Zielona Góra, Poland
| | - Anna Szczurek
- Department of Mechanics, Materials Science and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50370 Wrocław, Poland
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12
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Wang Z, Li X, Pöselt E, Eling B, Liao T, Wang Z. Polymorphic microstructure of MDI/BD-block polyurethane as determined by temperature-sensitive conformation variation. SOFT MATTER 2021; 17:9447-9456. [PMID: 34612298 DOI: 10.1039/d1sm01283e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
MDI/BD-block thermoplastic polyurethanes (TPUs) crystallized at different isothermal temperatures and different cooling rates were investigated using multiple techniques. The MDI/BD blocks crystallized in form II when the isothermal temperature was equal to or higher than 150 °C, and in form I at lower isothermal temperatures. Form II had a higher crystal elastic modulus of 6.75 GPa than form I of 1.31 GPa. Form I exhibited contracted conformation, while form II exhibited an extended conformation when viewed from the length of the c-axis in the crystalline state. Based on an analysis of the second derivative in FTIR spectroscopy and simple modeling, the conformation differences were considered to stem from the urethane group's internal bond rotation concerning the phenyl ring and the opening bond angle of phenyl-CH2-phenyl. The generation of form II above 150 °C may be due to the activation of urethane and the flexible methylene elevated by the high temperature. Overall, it was seen that the crystallization of MDI/BD blocks involved a physicochemical change.
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Affiliation(s)
- Zeyu Wang
- Ningbo Key Laboratory of Specialty Polymers, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China.
| | - Xuke Li
- Ningbo Key Laboratory of Specialty Polymers, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China.
| | - Elmar Pöselt
- BASF, Polyurethanes GmbH, Elastogranstrasse 60, 49448, Lemförde, Germany
| | - Berend Eling
- BASF, Polyurethanes GmbH, Elastogranstrasse 60, 49448, Lemförde, Germany
| | - Tao Liao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, 130022 Changchun, P. R. China
| | - Zongbao Wang
- Ningbo Key Laboratory of Specialty Polymers, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China.
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13
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Coile MW, Harmon RE, Wang G, SriBala G, Broadbelt LJ. Kinetic Monte Carlo Tool for Kinetic Modeling of Linear Step‐Growth Polymerization: Insight into Recycling of Polyurethanes. MACROMOL THEOR SIMUL 2021. [DOI: 10.1002/mats.202100058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Matthew W. Coile
- Department of Chemical and Biological Engineering Northwestern University Evanston IL 60208 USA
| | - Rebecca E. Harmon
- Department of Chemical and Biological Engineering Northwestern University Evanston IL 60208 USA
- Van't Hoff Institute for Molecular Sciences University of Amsterdam Amsterdam 1098 XH The Netherlands
| | - Guanhua Wang
- Department of Chemical and Biological Engineering Northwestern University Evanston IL 60208 USA
| | - Gorugantu SriBala
- Department of Chemical and Biological Engineering Northwestern University Evanston IL 60208 USA
| | - Linda J. Broadbelt
- Department of Chemical and Biological Engineering Northwestern University Evanston IL 60208 USA
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14
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Smaranda I, Nila A, Ganea P, Daescu M, Zgura I, Ciobanu RC, Trandabat A, Baibarac M. The Influence of the Ceramic Nanoparticles on the Thermoplastic Polymers Matrix: Their Structural, Optical, and Conductive Properties. Polymers (Basel) 2021; 13:polym13162773. [PMID: 34451312 PMCID: PMC8402000 DOI: 10.3390/polym13162773] [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: 07/26/2021] [Revised: 08/12/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022] Open
Abstract
This paper prepared composites under the free membranes form that are based on thermoplastic polymers of the type of polyurethane (TPU) and polyolefin (TPO), which are blended in the weight ratio of 2:1, and ceramic nanoparticles (CNs) such as BaSrTiO3 and SrTiO3. The structural, optical, and conductive properties of these new composite materials are reported. The X-ray diffraction studies highlight a cubic crystalline structure of these CNs. The main variations in the vibrational properties of the TPU:TPO blend induced by CNs consist of the following: (i) the increase in the intensity of the Raman line of 1616 cm-1; (ii) the down-shift of the IR band from 800 to 791 cm-1; (iii) the change of the ratio between the absorbance of IR bands localized in the spectral range 950-1200 cm-1; and (iv) the decrease in the absorbance of the IR band from 1221 cm-1. All these variations were correlated with a preferential adsorption of thermoplastic polymers on the CNs surface. A photoluminescence (PL) quenching process of thermoplastic polymers is demonstrated to occur in the presence of CNs. The anisotropic PL measurements have highlighted a change in the angle of the binding of the TPU:TPO blend, which varies from 23.7° to ≈49.3° and ≈53.4°, when the concentration of BaSrTiO3 and SrTiO3 CNs, respectively, is changed from 0 to 25 wt. %. Using dielectric spectroscopy, two mechanisms are invoked to take place in the case of the composites based on TPU:TPO blends and CNs, i.e., one regarding the type of the electrical conduction and another specifying the dielectric-dipolar relaxation processes.
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Affiliation(s)
- Ion Smaranda
- Laboratory Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, R077125 Bucharest, Romania; (I.S.); (A.N.); (P.G.); (M.D.); (I.Z.)
| | - Andreea Nila
- Laboratory Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, R077125 Bucharest, Romania; (I.S.); (A.N.); (P.G.); (M.D.); (I.Z.)
| | - Paul Ganea
- Laboratory Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, R077125 Bucharest, Romania; (I.S.); (A.N.); (P.G.); (M.D.); (I.Z.)
| | - Monica Daescu
- Laboratory Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, R077125 Bucharest, Romania; (I.S.); (A.N.); (P.G.); (M.D.); (I.Z.)
| | - Irina Zgura
- Laboratory Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, R077125 Bucharest, Romania; (I.S.); (A.N.); (P.G.); (M.D.); (I.Z.)
| | - Romeo C. Ciobanu
- Department of Electrical Measurements and Materials, Faculty of Electrical Engineering, Technical University Gh. Asachi Iasi, Boulevard Profesor Dimitrie Mangeron 67, R070050 Iasi, Romania; (R.C.C.); (A.T.)
| | - Alexandru Trandabat
- Department of Electrical Measurements and Materials, Faculty of Electrical Engineering, Technical University Gh. Asachi Iasi, Boulevard Profesor Dimitrie Mangeron 67, R070050 Iasi, Romania; (R.C.C.); (A.T.)
| | - Mihaela Baibarac
- Laboratory Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, R077125 Bucharest, Romania; (I.S.); (A.N.); (P.G.); (M.D.); (I.Z.)
- Correspondence: ; Tel.: + 40-21-3690170
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15
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Li Z, Li B, Chen B, Zhang J, Li Y. 3D printed graphene/polyurethane wearable pressure sensor for motion fitness monitoring. NANOTECHNOLOGY 2021; 32:395503. [PMID: 34126609 DOI: 10.1088/1361-6528/ac0b1b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 06/14/2021] [Indexed: 06/12/2023]
Abstract
The structural design of three-dimensional (3D) flexible wearable sensors using conductive polymer composites is a hot spot in current research. In this paper, honeycomb-shaped flexible resistive pressure sensors with three different support structures were manufactured by using thermoplastic polyurethane and graphene nanoplatelets composites based on fused deposition 3D printing technology. Based on the various 3D conductive network of the sensors, the flexible sensor exhibit excellent piezoresistive performance, such as adjustable gauge factor (GF) (13.70-54.58), exceptional durability and stability. A combination of representative volume element and finite element simulations was used to simulate the stress distribution of sensors with different structures to predict the structure's effect on the sensor GF. In addition, the sensor can be attached to human body to monitor the body's swallowing and walking behaviors. The sensor has prospective process applications for intelligent wearable devices.
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Affiliation(s)
- Zhongming Li
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, People's Republic of China
| | - Bin Li
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, People's Republic of China
| | - Boqi Chen
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, People's Republic of China
| | - Jin Zhang
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, People's Republic of China
| | - Yang Li
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, People's Republic of China
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16
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Baibarac M, Nila A, Smaranda I, Stroe M, Stingescu L, Cristea M, Cercel RC, Lorinczi A, Ganea P, Mercioniu I, Ciobanu R, Schreiner C, Garcia RG, Bartha C. Optical, Structural, and Dielectric Properties of Composites Based on Thermoplastic Polymers of the Polyolefin and Polyurethane Type and BaTiO 3 Nanoparticles. MATERIALS 2021; 14:ma14040753. [PMID: 33562686 PMCID: PMC7915712 DOI: 10.3390/ma14040753] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/31/2021] [Accepted: 02/01/2021] [Indexed: 11/16/2022]
Abstract
In this work, new films containing composite materials based on blends of thermoplastic polymers of the polyurethane (TPU) and polyolefin (TPO) type, in the absence and presence of BaTiO3 nanoparticles (NPs) with the size smaller 100 nm, were prepared. The vibrational properties of the free films depending on the weight ratio of the two thermoplastic polymers were studied. Our results demonstrate that these films are optically active, with strong, broad, and adjustable photoluminescence by varying the amount of TPU. The crystalline structure of BaTiO3 and the influence of thermoplastic polymers on the crystallization process of these inorganic NPs were determined by X-ray diffraction (XRD) studies. The vibrational changes induced in the thermoplastic polymer's matrix of the BaTiO3 NPs were showcased by Raman scattering and FTIR spectroscopy. The incorporation of BaTiO3 NPs in the matrix of thermoplastic elastomers revealed the shift dependence of the photoluminescence (PL) band depending on the BaTiO3 NP concentration, which was capable of covering a wide visible spectral range. The dependencies of the dielectric relaxation phenomena with the weight of BaTiO3 NPs in thermoplastic polymers blends were also demonstrated.
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Affiliation(s)
- M. Baibarac
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania; (A.N.); (I.S.); (M.S.); (L.S.); (M.C.); (R.C.C.); (A.L.); (P.G.)
- Correspondence: ; Tel.: +40-21-3690170
| | - A. Nila
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania; (A.N.); (I.S.); (M.S.); (L.S.); (M.C.); (R.C.C.); (A.L.); (P.G.)
| | - I. Smaranda
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania; (A.N.); (I.S.); (M.S.); (L.S.); (M.C.); (R.C.C.); (A.L.); (P.G.)
| | - M. Stroe
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania; (A.N.); (I.S.); (M.S.); (L.S.); (M.C.); (R.C.C.); (A.L.); (P.G.)
| | - L. Stingescu
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania; (A.N.); (I.S.); (M.S.); (L.S.); (M.C.); (R.C.C.); (A.L.); (P.G.)
| | - M. Cristea
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania; (A.N.); (I.S.); (M.S.); (L.S.); (M.C.); (R.C.C.); (A.L.); (P.G.)
| | - R. C. Cercel
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania; (A.N.); (I.S.); (M.S.); (L.S.); (M.C.); (R.C.C.); (A.L.); (P.G.)
| | - A. Lorinczi
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania; (A.N.); (I.S.); (M.S.); (L.S.); (M.C.); (R.C.C.); (A.L.); (P.G.)
| | - P. Ganea
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania; (A.N.); (I.S.); (M.S.); (L.S.); (M.C.); (R.C.C.); (A.L.); (P.G.)
| | - I. Mercioniu
- National Institute of Materials Physics, Atomic Structures and Defects in Advanced Materials Laboratory, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania;
| | - R. Ciobanu
- SC All Green SRL, 8 George Cosbuc, 700470 Iasi, Romania; (R.C.); (C.S.)
- Faculty of Electrical Engineering, Department of Electrical Measurements and Materials, Technical University Gh. Asachi Iasi, Bd. Professor Dimitrie Mangeron 67, 70050 Iasi, Romania
| | - C. Schreiner
- SC All Green SRL, 8 George Cosbuc, 700470 Iasi, Romania; (R.C.); (C.S.)
- Faculty of Electrical Engineering, Department of Electrical Measurements and Materials, Technical University Gh. Asachi Iasi, Bd. Professor Dimitrie Mangeron 67, 70050 Iasi, Romania
| | - R. G. Garcia
- Izertis, Parque Cientifico Tecnologico, Avda. Del Jardin Botanico, 1345 Edificio Intra, 33203 Gijon, Spain;
| | - C. Bartha
- National Institute of Materials Physics, Magnetism and Superconductivity Laboratory, Atomistilor Street 405A, P.O. Box MG-7, R077125 Bucharest, Romania;
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Boulkadid MK, Touidjine S, Trache D, Belkhiri S. Analytical Methods for the Assessment of Curing Kinetics of Polyurethane Binders for High-Energy Composites. Crit Rev Anal Chem 2021; 52:1112-1121. [PMID: 33393396 DOI: 10.1080/10408347.2020.1863768] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Polyurethane (PU) elastomers are largely utilized in the field of high-energy composites such as polymer-bonded explosives (PBXs) and solid rocket grains, due to their distinguished characteristics. Curing kinetics assessment is a crucial parameter to take into account to comprehend the processes to develop new high-energy composites. A comprehensive analytical characterization of curing kinetics is of fundamental importance to produce PU polymers with the most suitable and attractive properties. Moreover, to attain the optimal curing conditions, accurate analytical techniques, and strategies are essential to effectively evaluate their kinetic properties. This paper gives an overview on experimental tools, which can be used for a convenient analysis of kinetic behavior of these binders. The employment of each tool is showed and discussed by appropriate examples from the literature.
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Affiliation(s)
- Moulai Karim Boulkadid
- Energetic Propulsion Laboratory, Teaching and Research unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046, Algiers, Algeria
| | - Sabri Touidjine
- Energetic Propulsion Laboratory, Teaching and Research unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046, Algiers, Algeria
| | - Djalal Trache
- Energetic Materials Laboratory, Teaching and Research unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046, Algiers, Algeria
| | - Samir Belkhiri
- Energetic Propulsion Laboratory, Teaching and Research unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046, Algiers, Algeria
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18
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Chen X, Patankar KA, Larive M. Monitoring Polyurethane Foaming Reactions Using Near-Infrared Hyperspectral Imaging. APPLIED SPECTROSCOPY 2021; 75:46-56. [PMID: 32584146 DOI: 10.1177/0003702820941877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polyurethane (PU) foams are finding increasingly wider applications ranging from memory foams and mattresses to cushions and insulation materials. They are prepared by reactions between multifunctional isocyanates and polyols as the two main building blocks, along with other additives, including the blowing agents. A non-contact near-infrared (NIR) hyperspectral imaging (HSI) camera was used in this study to monitor PU foaming reactions between a polymeric methylene diphenyl diisocyanate, polyol, and water. Five foams were prepared with three process variables: water content, mixing time, and catalyst levels. Spectral changes characteristic of the PU reactions were observed and clear difference in kinetics could be effectively extracted from such NIR HSI results. The NIR HSI technology offers two substantial advantages over the conventional Fourier transform- (FT-) NIR systems: (i) faster spectral acquisition time and (ii) higher spatial resolution of line images rather than the point measurement. Examples are provided to illustrate these two advantages. The potential to acquire chemical images of PU foams is also demonstrated.
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19
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Molecular Rotors with Aggregation-Induced Emission (AIE) as Fluorescent Probes for the Control of Polyurethane Synthesis. CHEMOSENSORS 2020. [DOI: 10.3390/chemosensors9010003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In this work, the use of fluorescent molecular rotors such as 9-(2,2-dicyanovinyl)julolidine (DCVJ) and 2,3-bis(4-(phenyl(4-(1,2,2-triphenylvinyl) phenyl)amino)phenyl)fumaronitrile (TPETPAFN) was proposed for the real-time monitoring of polyurethane (PU) formation in a solution of dimethylacetamide starting with 4,4′-methylenediphenyl diisocyanate (MDI) and different polyethylene glycols (PEG400 and PEG600) as diols. Notably, relative viscosity variations were compared with fluorescence changes, recorded as a function of the polymerization progress. The agreement between these two parameters suggested the innovative use of a low-cost fluorescence detection system based on a LED/photodiode assembly directly mountable on the reaction apparatus. The general validity of the proposed experiments enabled the monitoring of polyurethane polymerization and suggested its effective applications to a variety of industrial polymers, showing viscosity enhancement during polymerization.
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20
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Sriyai M, Chaiwon T, Molloy R, Meepowpan P, Punyodom W. Efficiency of liquid tin(ii) n-alkoxide initiators in the ring-opening polymerization of l-lactide: kinetic studies by non-isothermal differential scanning calorimetry. RSC Adv 2020; 10:43566-43578. [PMID: 35519714 PMCID: PMC9058326 DOI: 10.1039/d0ra07635j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 11/11/2020] [Indexed: 11/21/2022] Open
Abstract
Novel soluble liquid tin(ii) n-butoxide (Sn(OnC4H9)2), tin(ii) n-hexoxide (Sn(OnC6H13)2), and tin(ii) n-octoxide (Sn(OnC8H17)2) initiators were synthesized for use as coordination–insertion initiators in the bulk ring-opening polymerization (ROP) of l-lactide (LLA). In order to compare their efficiencies with the more commonly used tin(ii) 2-ethylhexanoate (stannous octoate, Sn(Oct)2) and conventional tin(ii) octoate/n-alcohol (SnOct2/nROH) initiating systems, kinetic parameters derived from monomer conversion data were obtained from non-isothermal differential scanning calorimetry (DSC). In this work, the three non-isothermal DSC kinetic approaches including dynamic (Kissinger, Flynn–Wall, and Ozawa); isoconversional (Friedman, Kissinger–Akahira–Sunose (KAS) and Ozawa–Flynn–Wall (OFW)); and Borchardt and Daniels (B/D) methods of data analysis were compared. The kinetic results showed that, under the same conditions, the rate of polymerization for the 7 initiators/initiating systems was in the order of liquid Sn(OnC4H9)2 > Sn(Oct)2/nC4H9OH > Sn(Oct)2 ≅ liquid Sn(OnC6H13)2 > Sn(Oct)2/nC6H13OH ≅ liquid Sn(OnC8H17)2 > Sn(Oct)2/nC8H17OH. The lowest activation energies (Ea = 52, 59, and 56 kJ mol−1 for the Kissinger, Flynn–Wall, and Ozawa dynamic methods; Ea = 53–60, 55–58, and 60–62 kJ mol−1 for the Friedman, KAS, and OFW isoconversional methods; and Ea = 76–84 kJ mol−1 for the B/D) were found in the polymerizations using the novel liquid Sn(OnC4H9)2 as the initiator, thereby showing it to be the most efficient initiator in the ROP of l-lactide. The efficiency of homogeneous liquid tin(ii) n-alkoxide initiators in the ROP of l-lactide was reported in this work by non-isothermal DSC kinetic approaches.![]()
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Affiliation(s)
- Montira Sriyai
- Department of Chemistry, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand.,Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand.,Graduate School, Chiang Mai University Chiang Mai 50200 Thailand
| | - Tawan Chaiwon
- Department of Chemistry, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand.,Graduate School, Chiang Mai University Chiang Mai 50200 Thailand
| | - Robert Molloy
- Center of Excellence in Materials Science and Technology, Chiang Mai University Chiang Mai 50200 Thailand
| | - Puttinan Meepowpan
- Department of Chemistry, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand.,Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand.,Center of Excellence in Materials Science and Technology, Chiang Mai University Chiang Mai 50200 Thailand
| | - Winita Punyodom
- Department of Chemistry, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand.,Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand.,Center of Excellence in Materials Science and Technology, Chiang Mai University Chiang Mai 50200 Thailand
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21
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Velvarská R, Tišler Z, Raichlová V, Hidalgo-Herrador JM. Raman Spectroscopy as Molybdenum and Tungsten Content Analysis Tool for Mesoporous Silica and Beta Zeolite Catalysts. Molecules 2020; 25:molecules25214918. [PMID: 33114259 PMCID: PMC7660599 DOI: 10.3390/molecules25214918] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 10/21/2020] [Accepted: 10/22/2020] [Indexed: 12/03/2022] Open
Abstract
Raman spectroscopy was used for the quantitative determination of Mo and W in Mo- and W-supported mesoporous silica (Mo/SBA-15 and W/SBA-15, respectively) and Mo-supported beta zeolite (Mo-BEA). Three Raman quantitative models were developed and optimized for the metal contents of Mo/SBA-15, W/SBA-15, and Mo/BEA. Subsequently, the models were characterized using the root mean square error of calibration (RMSEC), root mean square error of cross-validation (RMSECV), root mean square error of prediction (RMSEP), correlation coefficient, and predicted residual error sum of squares (PRESS) diagnostic function. The calibration range of the models were in the range of approximately 2–40 wt% for the SBA-15 support and 1–21 wt% for the BEA support because the BEA support presented lower Mo absorption than the SBA-15 support. The RMSEC, RMSECV, and RMSEP values were below 1.80% for all developed models. The highest and lowest correlation coefficients corresponded to the W/SBA-15 (0.9984) and Mo/BEA (0.9777) models, respectively. The change in catalyst support affected the mentioned chemometric parameters (Mo/SBA-15 vs. Mo/BEA). Subsequently, Raman spectroscopy combined with the temperature control stage was used to study the calcination of Mo/BEA, Mo/SBA-15, and W/SBA-15 using three-dimensional diagrams, in which the changes in catalyst structure were analyzed as functions of the temperature and time. Raman spectroscopy was determined to be a suitable analytical tool for the quantitative analysis of the metal contents of the catalyst and optimization of the calcination process. Therefore, Raman spectroscopy can be used during catalyst manufacturing.
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22
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Zhu X, Ng LWT, Hu G, Wu T, Um D, Macadam N, Hasan T. Hexagonal Boron Nitride-Enhanced Optically Transparent Polymer Dielectric Inks for Printable Electronics. ADVANCED FUNCTIONAL MATERIALS 2020; 30:2002339. [PMID: 32774201 PMCID: PMC7405982 DOI: 10.1002/adfm.202002339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/09/2020] [Accepted: 04/15/2020] [Indexed: 05/23/2023]
Abstract
Solution-processable thin-film dielectrics represent an important material family for large-area, fully-printed electronics. Yet, in recent years, it has seen only limited development, and has mostly remained confined to pure polymers. Although it is possible to achieve excellent printability, these polymers have low (≈2-5) dielectric constants (ε r ). There have been recent attempts to use solution-processed 2D hexagonal boron nitride (h-BN) as an alternative. However, the deposited h-BN flakes create porous thin-films, compromising their mechanical integrity, substrate adhesion, and susceptibility to moisture. These challenges are addressed by developing a "one-pot" formulation of polyurethane (PU)-based inks with h-BN nano-fillers. The approach enables coating of pinhole-free, flexible PU+h-BN dielectric thin-films. The h-BN dispersion concentration is optimized with respect to exfoliation yield, optical transparency, and thin-film uniformity. A maximum ε r ≈ 7.57 is achieved, a two-fold increase over pure PU, with only 0.7 vol% h-BN in the dielectric thin-film. A high optical transparency of ≈78.0% (≈0.65% variation) is measured across a 25 cm2 area for a 10 μm thick dielectric. The dielectric property of the composite is also consistent, with a measured areal capacitance variation of <8% across 64 printed capacitors. The formulation represents an optically transparent, flexible thin-film, with enhanced dielectric constant for printed electronics.
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Affiliation(s)
- Xiaoxi Zhu
- Cambridge Graphene CentreUniversity of CambridgeCambridgeCB3 0FAUK
| | - Leonard W. T. Ng
- Cambridge Graphene CentreUniversity of CambridgeCambridgeCB3 0FAUK
| | - Guohua Hu
- Cambridge Graphene CentreUniversity of CambridgeCambridgeCB3 0FAUK
- Department of Electronic EngineeringThe Chinese University of Hong KongShatinHong KongS. A. R.
| | - Tien‐Chun Wu
- Cambridge Graphene CentreUniversity of CambridgeCambridgeCB3 0FAUK
| | - Doo‐Seung Um
- Cambridge Graphene CentreUniversity of CambridgeCambridgeCB3 0FAUK
| | | | - Tawfique Hasan
- Cambridge Graphene CentreUniversity of CambridgeCambridgeCB3 0FAUK
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23
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Buchner GA, Rudolph M, Norwig J, Marker V, Gürtler C, Schomäcker R. Kinetic Investigation of Polyurethane Rubber Formation from CO
2
‐Containing Polyols. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.201900103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Georg A. Buchner
- Technische Universität BerlinDepartment of Chemistry, TC8 Straße des 17. Juni 124 10623 Berlin Germany
| | - Maik Rudolph
- Technische Universität BerlinDepartment of Chemistry, TC8 Straße des 17. Juni 124 10623 Berlin Germany
| | - Jochen Norwig
- Covestro Deutschland AGCatalysis and Technology Incubation Kaiser-Wilhelm-Allee 60 51373 Leverkusen Germany
| | - Volker Marker
- Covestro Deutschland AGCatalysis and Technology Incubation Kaiser-Wilhelm-Allee 60 51373 Leverkusen Germany
| | - Christoph Gürtler
- Covestro Deutschland AGCatalysis and Technology Incubation Kaiser-Wilhelm-Allee 60 51373 Leverkusen Germany
| | - Reinhard Schomäcker
- Technische Universität BerlinDepartment of Chemistry, TC8 Straße des 17. Juni 124 10623 Berlin Germany
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24
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Preparation of Polyurethane Monolithic Resins and Modification with a Condensed Tannin-Yielding Self-Healing Property. Polymers (Basel) 2019; 11:polym11111890. [PMID: 31731736 PMCID: PMC6918299 DOI: 10.3390/polym11111890] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 11/06/2019] [Accepted: 11/13/2019] [Indexed: 11/17/2022] Open
Abstract
Resins of polyurethane were prepared from vegetable oils (crambe and castor) and modified by adding green corrosion inhibitor (condensed tannin). The oils were characterized by gas chromatography with flame-ionization detection (GC-FID), attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR) and thermogravimetric analysis (TGA). The reaction was monitored by characterizing the intermediate products (polyester and prepolymer). The polyester was characterized by solubility in methanol, acidity index, hydroxyl groups and FTIR-ATR, and the prepolymer was characterized by solid content, solvent content, isocyanate (NCO) groups and FTIR-ATR. The formation of PU resins was confirmed by FTIR-ATR and TGA, and the presence of tannin particles incorporated in the coating can be observed by optical microscopy (OM). The absence of the band attributed to NCO in FTIR-ATR spectra of the resins confirmed the complete reaction between polyester and prepolymer. The OM observation and a video demonstrate that Polyurethane (PU)-modified with condensed tannin resin presents self-healing effect, probably through the formation of new hydrogen bonds when in contact with deionized water. Therefore, these results open possibilities for new synthetic routes aiming at improving the very important self-healing property for protecting metals and their alloys against corrosion, extending significantly the metallic materials lifetime as previously demonstrated by our group.
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25
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Niu C, Liu J, Qian T, Shen X, Zhou J, Yan C. Single lithium-ion channel polymer binder for stabilizing sulfur cathodes. Natl Sci Rev 2019; 7:315-323. [PMID: 34692047 PMCID: PMC8288923 DOI: 10.1093/nsr/nwz149] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/14/2019] [Accepted: 09/19/2019] [Indexed: 12/21/2022] Open
Abstract
Lithium–sulfur batteries have great potential for high-performance energy-storage devices, yet the severe diffusion of soluble polysulfide to electrolyte greatly limits their practical applications. To address the above issues, herein we design and synthesize a novel polymer binder with single lithium-ion channels allowing fast lithium-ion transport while blocking the shuttle of unnecessary polysulfide anions. In situ UV–vis spectroscopy measurements reveal that the prepared polymer binder has effective immobilization to polysulfide intermediates. As expected, the resultant sulfur cathode achieves an excellent specific capacity of 1310 mAh g−1 at 0.2 C, high Coulombic efficiency of 99.5% at 0.5 C after 100 cycles and stable cycling performance for 300 cycles at 1 C (1 C = 1675 mA g−1). This study reports a new avenue to assemble a polymer binder with a single lithium-ion channel for solving the serious problem of energy attenuation of lithium–sulfur batteries.
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Affiliation(s)
- Chaoqun Niu
- College of Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, China
| | - Jie Liu
- College of Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, China
| | - Tao Qian
- College of Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, China
| | - Xiaowei Shen
- College of Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, China
| | - Jinqiu Zhou
- College of Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, China
| | - Chenglin Yan
- College of Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, China
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26
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Kumar B, Noor N, Thakur S, Pan N, Narayana H, Yan SC, Wang F, Shah P. Shape Memory Polyurethane-Based Smart Polymer Substrates for Physiologically Responsive, Dynamic Pressure (Re)Distribution. ACS OMEGA 2019; 4:15348-15358. [PMID: 31572833 PMCID: PMC6761750 DOI: 10.1021/acsomega.9b01167] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 09/02/2019] [Indexed: 06/10/2023]
Abstract
Shape memory polymers (SMPs) are an exciting class of stimuli-responsive smart materials that demonstrate reactive and reversible changes in mechanical property, usually by switching between different states due to external stimuli. We report on the development of a polyurethane-based SMP foam for effective pressure redistribution that demonstrates controllable changes in dynamic pressure redistribution capability at a low transition temperature (∼24 °C)-ideally suited to matching modulations in body contact pressure for dynamic pressure relief (e.g., for alleviation or pressure ulcer effects). The resultant SMP material has been extensively characterized by a series of tests including stress-strain testing, compression testing, dynamic mechanical analysis, optical microscopy, UV-visible absorbance spectroscopy, variable-temperature areal pressure distribution, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, differential scanning calorimetry, dynamic thermogravimetric analysis, and 1H nuclear magnetic resonance spectroscopy. The foam system exhibits high responsivity when tested for plantar pressure modulation with significant potential in pressure ulcers treatment. Efficient pressure redistribution (∼80% reduction in interface pressure), high stress response (∼30% applied stress is stored in fixity and released on recovery), and excellent deformation recovery (∼100%) are demonstrated in addition to significant cycling ability without performance loss. By providing highly effective pressure redistribution and modulation when in contact with the body's surface, this SMP foam offers novel mechanisms for alleviating the risk of pressure ulcers.
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Affiliation(s)
- Bipin Kumar
- Department of Textile Technology, Indian
Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Nuruzzaman Noor
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Suman Thakur
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Ning Pan
- Biological & Agricultural Engineering, UC Davis, Davis, California 95616, United States
| | - Harishkumar Narayana
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Siu-cheong Yan
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Faming Wang
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Parth Shah
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
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27
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Luo H, Xiang Y, He D, Li Y, Zhao Y, Wang S, Pan X. Leaching behavior of fluorescent additives from microplastics and the toxicity of leachate to Chlorella vulgaris. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 678:1-9. [PMID: 31075575 DOI: 10.1016/j.scitotenv.2019.04.401] [Citation(s) in RCA: 139] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/26/2019] [Accepted: 04/26/2019] [Indexed: 05/22/2023]
Abstract
Chemical additives leaching from microplastics and their effects on physiology of microalgae are of environmental significance. So far, these issues remain unclear. Here, the leaching behavior of fluorescent additives from polyurethane sponge microplastics in simulated (acidic, saline, and basic water) and natural waters (river, lake, wetland, and sea water) was investigated. Release amount of additives increased with increasing solution pH and leaching time. The maximum release amount was reached at the leaching time of 12-24 h and the 3,3'-diaminobenzidine-like substances were identified in the leachate. The leached concentrations of fluorescent additives in simulated and natural waters followed the order of basic water > saline water > seawater > West Lake > River > Wetland. Effects of leachate and microplastics on growth and photosynthesis of Chlorella vulgaris were further evaluated. The maximum quantum efficiency of photosystem II (Fv/Fm) decreased with increasing leachate concentrations. Only high content (1.6 g L-1) of microplastics exerted significant inhibitory influence on cell photosynthesis when microalgae were exposed to microplastics alone. Retention of algal cells inside the porous sponge microplastics did not change their photosynthetic efficiency. These findings indicate that leaching process of additives from microplastics depends mainly on water environments and the leached chemicals may pose ecological risks to aquatic organisms.
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Affiliation(s)
- Hongwei Luo
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yahui Xiang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Dongqin He
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Yu Li
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yaoyao Zhao
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Shuo Wang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiangliang Pan
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
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28
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A novel disposable self-adhesive inked paper device for electrochemical sensing of dopamine and serotonin neurotransmitters and biosensing of glucose. Biosens Bioelectron 2019; 138:111310. [PMID: 31103014 DOI: 10.1016/j.bios.2019.05.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/02/2019] [Accepted: 05/06/2019] [Indexed: 12/11/2022]
Abstract
In this work, we detail the progress of a novel electrochemical disposable device, which has a relatively low cost and easy production, with a novel conductive ink, that consists of graphite and automotive varnish mixture, deposited over a self-adhesive paper, granting an easy production with relatively low cost. The electrode surface was characterized by scanning electron microscopy, X-ray powder diffraction and Fourier transforms infrared and Raman, cyclic voltammetry and electrochemical impedance spectroscopies. In addition, the proposed electrode was applied for individual electrochemical determination of dopamine and serotonin. The device achieved a linear response between 30 and 800 μmol L-1 and a limit of detection (LOD) of 0.13 μmol L-1, by square wave voltammetry for dopamine and a linear range from 6.0 to 100 μmol L-1, with a LOD of 0.39 μmol L-1, by differential pulse voltammetry for serotonin. Later, the working electrode was modified with glucose oxidase and dihexadecyl phosphate film in order to obtain a biosensor. At this stage, CV was applied to detect glucose in the range of 1.0-10 μmol L-1 and LOD of 0.21 μmol L-1. By three different techniques and analytes, the sensoring and biosensoring processes presented high reproducibility. The proposed adhesive electrode is easy to prepare, disposable, within non-restrictive nature, which allows an approach of a new device for electrochemical sensing and biosensing.
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29
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Polymerization Kinetics and Physical Properties of Polyurethanes Synthesized by Bio-Based Monomers. Macromol Res 2019. [DOI: 10.1007/s13233-019-7029-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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30
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Zhou X. Thermokinetics study of degradation process of soybean-based polyurethane foams. J Appl Polym Sci 2018. [DOI: 10.1002/app.47357] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xinxing Zhou
- Key Laboratory of Highway Construction and Maintenance Technology in Loess Region, Ministry of Transport; Shanxi Transportation Research Institute; Taiyuan 030006 Shanxi People's Republic of China
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31
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Cure kinetics of poly (5-ethylidene-2-norbornene) with 2nd generation Hoveyda-Grubbs’ catalyst for self-healing applications. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.07.082] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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32
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Detection of degradation markers from polymer surfaces by a novel SERS-based strategy. Talanta 2018; 191:156-161. [PMID: 30262045 DOI: 10.1016/j.talanta.2018.08.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 08/09/2018] [Accepted: 08/17/2018] [Indexed: 01/28/2023]
Abstract
This paper provides new insights for the study of polymer degradation through the detection of markers released at the polymer surface using Al-coated SERS active substrates. Combining a nanodestructive sampling procedure with the SERS sensitivity allows achieving detection limits much lower than traditional polymer characterization techniques, opening the way to the use of SERS as part of an innovative strategy to diagnose surface degradation in polymeric museum artefacts. The method was applied to artificially photo-aged model polymers and to museum artworks.
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33
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da Silva FAG, de Araújo CMS, Alcaraz-Espinoza JJ, de Oliveira HP. Toward flexible and antibacterial piezoresistive porous devices for wound dressing and motion detectors. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/polb.24626] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Fernando A. G. da Silva
- Institute of Materials Science, Federal University of Sao Francisco Valley; Juazeiro BA 48920-310 Brazil
| | - Clisman M. S. de Araújo
- Institute of Materials Science, Federal University of Sao Francisco Valley; Juazeiro BA 48920-310 Brazil
| | - Jose J. Alcaraz-Espinoza
- Institute of Materials Science, Federal University of Sao Francisco Valley; Juazeiro BA 48920-310 Brazil
| | - Helinando P. de Oliveira
- Institute of Materials Science, Federal University of Sao Francisco Valley; Juazeiro BA 48920-310 Brazil
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34
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Sujathan S, Kniggendorf AK, Kumar A, Roth B, Rosenwinkel KH, Nogueira R. Heat and Bleach: A Cost-Efficient Method for Extracting Microplastics from Return Activated Sludge. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 73:641-648. [PMID: 28550340 DOI: 10.1007/s00244-017-0415-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Accepted: 05/13/2017] [Indexed: 05/06/2023]
Abstract
The extraction of plastic microparticles, so-called microplastics, from sludge is a challenging task due to the complex, highly organic material often interspersed with other benign microparticles. The current procedures for microplastic extraction from sludge are time consuming and require expensive reagents for density separation as well as large volumes of oxidizing agents for organic removal, often resulting in tiny sample sizes and thus a disproportional risk of sample bias. In this work, we present an improved extraction method tested on return activated sludge (RAS). The treatment of 100 ml of RAS requires only 6% hydrogen peroxide (H2O2) for bleaching at 70 °C, followed by density separation with sodium nitrate/sodium thiosulfate (SNT) solution, and is completed within 24 h. Extracted particles of all sizes were chemically analyzed with confocal Raman microscopy. An extraction efficiency of 78 ± 8% for plastic particle sizes 20 µm and up was confirmed in a recovery experiment. However, glass shards with a diameter of less than 20 µm remained in the sample despite the density of glass exceeding the density of the separating SNT solution by 1.1 g/cm3. This indicates that density separation may be unreliable for particle sizes in the lower micrometer range.
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Affiliation(s)
- Surya Sujathan
- Department of Civil Engineering, IIT Kanpur, Kanpur, 208016, India
| | - Ann-Kathrin Kniggendorf
- Hannover Centre for Optical Technologies, Gottfried-Wilhelm-Leibniz Universität Hannover, Nienburger Str. 2, 30167, Hannover, Germany
| | - Arun Kumar
- Department of Civil Engineering, IIT Delhi, Hauz Khas, 110016, India
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Gottfried-Wilhelm-Leibniz Universität Hannover, Nienburger Str. 2, 30167, Hannover, Germany
| | - Karl-Heinz Rosenwinkel
- Institut für Siedlungswasserwirtschaft und Abfalltechnik, Gottfried-Wilhelm-Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany
| | - Regina Nogueira
- Institut für Siedlungswasserwirtschaft und Abfalltechnik, Gottfried-Wilhelm-Leibniz Universität Hannover, Welfengarten 1, 30167, Hannover, Germany.
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35
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Ramirez D, Nanclares J, Spontón M, Polo M, Estenoz D, Jaramillo F. Effect of cooling induced crystallization upon the properties of segmented thermoplastic polyurethanes. JOURNAL OF POLYMER ENGINEERING 2017. [DOI: 10.1515/polyeng-2016-0106] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
An investigation on the cooling-induced crystallization in three thermoplastic polyurethanes based on MDI, PTMG, and 1.4-BD as chain extender with different hard segment content is reported. Thermal transitions were determined using differential scanning calorimetry (DSC) measurements at different cooling rates, and thermal stability was studied by thermogravimetric analysis. Changes in Raman spectra were useful to correlate the thermal transitions with changes in the morphology of the polymers. The dissimilarity in the composition gave different rheological behavior in the molten state, indicated by the temperature dependence of the viscosity. The mechanical properties and the crystallinity was influenced not only by the cooling rate but also by the hard segment content. Thermoplastic polyurethanes with more hard segment content formed more crystalline hard domains as evidenced by the DSC and atomic force microscopy results.
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36
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Piszczyk Ł, Kosmela P, Strankowski M. Elastic polyurethane foams containing graphene nanoplatelets. ADVANCES IN POLYMER TECHNOLOGY 2017. [DOI: 10.1002/adv.21819] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Łukasz Piszczyk
- Polymer Technology Department; Chemical Faculty; Gdansk University of Technology; Gdansk Poland
| | - Paulina Kosmela
- Polymer Technology Department; Chemical Faculty; Gdansk University of Technology; Gdansk Poland
| | - Michał Strankowski
- Polymer Technology Department; Chemical Faculty; Gdansk University of Technology; Gdansk Poland
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37
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Phase separation and electrical conductivity of nanocomposites made of ether-/ester-based polyurethane blends and carbon nanotubes. Macromol Res 2017. [DOI: 10.1007/s13233-017-5032-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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38
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McEnery MAP, Lu S, Gupta MK, Zienkiewicz KJ, Wenke JC, Kalpakci KN, Shimko D, Duvall CL, Guelcher SA. Oxidatively Degradable Poly(thioketal urethane)/Ceramic Composite Bone Cements with Bone-Like Strength. RSC Adv 2016; 6:109414-109424. [PMID: 27895899 PMCID: PMC5123593 DOI: 10.1039/c6ra24642g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Synthetic bone cements are commonly used in orthopaedic procedures to aid in bone regeneration following trauma or disease. Polymeric cements like PMMA provide the mechanical strength necessary for orthopaedic applications, but they are not resorbable and do not integrate with host bone. Ceramic cements have a chemical composition similar to that of bone, but their brittle mechanical properties limit their use in weight-bearing applications. In this study, we designed oxidatively degradable, polymeric bone cements with mechanical properties suitable for bone tissue engineering applications. We synthesized a novel thioketal (TK) diol, which was crosslinked with a lysine triisocyanate (LTI) prepolymer to create hydrolytically stable poly(thioketal urethane)s (PTKUR) that degrade in the oxidative environment associated with bone defects. PTKUR films were hydrolytically stable for up to 6 months, but degraded rapidly (<1 week) under simulated oxidative conditions in vitro. When combined with ceramic micro- or nanoparticles, PTKUR cements exhibited working times comparable to calcium phosphate cements and strengths exceeding those of trabecular bone. PTKUR/ceramic composite cements supported appositional bone growth and integrated with host bone near the bone-cement interface at 6 and 12 weeks post-implantation in rabbit femoral condyle plug defects. Histological evidence of osteoclast-mediated resorption of the cements was observed at 6 and 12 weeks. These findings demonstrate that a PTKUR bone cement with bone-like strength can be selectively resorbed by cells involved in bone remodeling, and thus represent an important initial step toward the development of resorbable bone cements for weight-bearing applications.
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Affiliation(s)
- Madison A P McEnery
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Sichang Lu
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Mukesh K Gupta
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Katarzyna J Zienkiewicz
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Joseph C Wenke
- U.S. Army Institute of Surgical Research, San Antonio, TX, USA
| | | | | | - Craig L Duvall
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Scott A Guelcher
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA; Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA; Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN
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Radiation Crosslinking of Polyurethanes: Characterization by FTIR, TGA, SEM, XRD, and Raman Spectroscopy. ACTA ACUST UNITED AC 2016. [DOI: 10.1155/2016/9802514] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Gamma radiation can be used for enhancing the physical properties of polyurethane (PU). Radiation was used to crosslink a polyurethane at room temperature; four samples of the PU solid film are irradiated at variable four radiation doses 0, 50, 100, and 150 kGy under vacuum conditions. Crosslinking radiation is more common than oxidative degradation and crosslinking is believed to be more efficient in the soft segment of PU. The structure of the PUs is performed by Fourier transform infrared (FTIR-ATR), Thermogravimetric Analysis (TGA-DTG), and X-ray Diffraction (XRD) which have been used to investigate the effect of gamma radiation on the polyurethane (PU). The results showed that the radiation crosslinking of polyurethanes improved the thermal stability and the crystallinity. The microstructure modifications of polyurethane samples have also been studied as a function of the dose using the scanning electron microscope (SEM). The effects of gamma irradiation on the color changes of polyurethane were observed. The irradiated PUs have conjugated structure and are capable of emitting purple fluorescence.
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40
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Mi HY, Jing X, Salick MR, Cordie TM, Turng LS. Carbon nanotube (CNT) and nanofibrillated cellulose (NFC) reinforcement effect on thermoplastic polyurethane (TPU) scaffolds fabricated via phase separation using dimethyl sulfoxide (DMSO) as solvent. J Mech Behav Biomed Mater 2016; 62:417-427. [PMID: 27266475 DOI: 10.1016/j.jmbbm.2016.05.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 05/18/2016] [Accepted: 05/23/2016] [Indexed: 12/15/2022]
Abstract
Although phase separation is a simple method of preparing tissue engineering scaffolds, it suffers from organic solvent residual in the scaffold. Searching for nontoxic solvents and developing effective solvent removal methods are current challenges in scaffold fabrication. In this study, thermoplastic polyurethane (TPU) scaffolds containing carbon nanotubes (CNTs) or nanofibrillated cellulose fibers (NFCs) were prepared using low toxicity dimethyl sulfoxide (DMSO) as a solvent. The effects of two solvent removal approaches on the final scaffold morphology were studied. The freeze drying method caused large pores, with small pores on the pore walls, which created connections between the pores. Meanwhile, the leaching and freeze drying method led to interconnected fine pores with smaller pore diameters. The nucleation effect of CNTs and the phase separation behavior of NFCs in the TPU solution resulted in significant differences in the microstructures of the resulting scaffolds. The mechanical performance of the nanocomposite scaffolds with different morphologies was investigated. Generally, the scaffolds with a fine pore structure showed higher compressive properties, and both the CNTs and NFCs improved the compressive properties of the scaffolds, with greater enhancement found in TPU/NFC nanocomposite scaffolds. In addition, all scaffolds showed good sustainability under cyclical load bearing, and the biocompatibility of the scaffolds was verified via 3T3 fibroblast cell culture.
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Affiliation(s)
- Hao-Yang Mi
- Department of Industrial Equipment and Control Engineering, South China University of Technology, Guangzhou 510640, China; Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Xin Jing
- Department of Industrial Equipment and Control Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Max R Salick
- Department of Engineering Physics, University of Wisconsin-Madison, WI 53706, USA
| | - Travis M Cordie
- Department of Biomedical, University of Wisconsin-Madison, WI 53706, USA
| | - Lih-Sheng Turng
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
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41
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Saavedra OA, Fadrique JG. Determination of Polyurethane Foam Growth Kinetics by a Simple Column Height Test. INT J CHEM KINET 2015. [DOI: 10.1002/kin.20961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Oscar Arciniega Saavedra
- Departamento de Fisicoquímica; Facultad de Química; Universidad Nacional Autónoma de México; México D.F. 04510 México
| | - Jesús Gracia Fadrique
- Departamento de Fisicoquímica; Facultad de Química; Universidad Nacional Autónoma de México; México D.F. 04510 México
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42
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Wu H, Li Z, Bai L, Zhu L, Gu J. Research on the Blocking Reaction Kinetics and Mechanism of Aqueous Polyurethane Micelles Blocked by 2,4,6-Trichlorophenol. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2015. [DOI: 10.1080/10601325.2015.1067046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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43
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A Study on Reaction Kinetics of PTMG/TDI Prepolymer with MOCA by Non-Isothermal DSC. ELASTOMERS AND COMPOSITES 2015. [DOI: 10.7473/ec.2015.50.2.092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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44
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Guo R, Ward CL, Davidson JM, Duvall CL, Wenke JC, Guelcher SA. A transient cell-shielding method for viable MSC delivery within hydrophobic scaffolds polymerized in situ. Biomaterials 2015; 54:21-33. [PMID: 25907036 PMCID: PMC4409667 DOI: 10.1016/j.biomaterials.2015.03.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 02/26/2015] [Accepted: 03/04/2015] [Indexed: 11/23/2022]
Abstract
Cell-based therapies have emerged as promising approaches for regenerative medicine. Hydrophobic poly(ester urethane)s offer the advantages of robust mechanical properties, cell attachment without the use of peptides, and controlled degradation by oxidative and hydrolytic mechanisms. However, the application of injectable hydrophobic polymers to cell delivery is limited by the challenges of protecting cells from reaction products and creating a macroporous architecture post-cure. We designed injectable carriers for cell delivery derived from reactive, hydrophobic polyisocyanate and polyester triol precursors. To overcome cell death caused by reaction products from in situ polymerization, we encapsulated bone marrow-derived stem cells (BMSCs) in fastdegrading, oxidized alginate beads prior to mixing with the hydrophobic precursors. Cells survived the polymerization at >70% viability, and rapid dissolution of oxidized alginate beads after the scaffold cured created interconnected macropores that facilitated cellular adhesion to the scaffold in vitro. Applying this injectable system to deliver BMSCs to rat excisional skin wounds showed that the scaffolds supported survival of transplanted cells and infiltration of host cells, which improved new tissue formation compared to both implanted, pre-formed scaffolds seeded with cells and acellular controls. Our design is the first to enable injectable delivery of settable, hydrophobic scaffolds where cell encapsulation provides a mechanism for both temporary cytoprotection during polymerization and rapid formation of macropores post-polymerization. This simple approach provides potential advantages for cell delivery relative to hydrogel technologies, which have weaker mechanical properties and require incorporation of peptides to achieve cell adhesion and degradability.
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Affiliation(s)
- Ruijing Guo
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA; Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Catherine L Ward
- US Army Institute of Surgical Research, Fort Sam Houston, TX, USA
| | - Jeffrey M Davidson
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN, USA; Research Service, VA Tennessee Valley Healthcare System, Nashville, TN, USA
| | - Craig L Duvall
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Joseph C Wenke
- US Army Institute of Surgical Research, Fort Sam Houston, TX, USA
| | - Scott A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA; Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA.
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45
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Kössl F, Lisaj M, Kozich V, Heyne K, Kühn O. Monitoring the alcoholysis of isocyanates with infrared spectroscopy. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2014.12.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Yilgör I, Yilgör E, Wilkes GL. Critical parameters in designing segmented polyurethanes and their effect on morphology and properties: A comprehensive review. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.12.014] [Citation(s) in RCA: 265] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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47
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Redondo-Foj B, Ortiz-Serna P, Carsí M, Sanchis MJ, Culebras M, Gómez CM, Cantarero A. Electrical conductivity properties of expanded graphite-polycarbonatediol polyurethane composites. POLYM INT 2014. [DOI: 10.1002/pi.4788] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Belen Redondo-Foj
- Departamento de Termodinámica Aplicada; Instituto de Tecnología Eléctrica Universitat Politècnica de Valencia; Camino de Vera s/n 46022 Valencia Spain
| | - Pilar Ortiz-Serna
- Departamento de Termodinámica Aplicada; Instituto de Tecnología Eléctrica Universitat Politècnica de Valencia; Camino de Vera s/n 46022 Valencia Spain
| | - Marta Carsí
- Departamento de Termodinámica Aplicada; Instituto de Tecnología Eléctrica Universitat Politècnica de Valencia; Camino de Vera s/n 46022 Valencia Spain
| | - María Jesús Sanchis
- Departamento de Termodinámica Aplicada; Instituto de Tecnología Eléctrica Universitat Politècnica de Valencia; Camino de Vera s/n 46022 Valencia Spain
| | - Mario Culebras
- Materials Science Institute; University of Valencia; PO Box 22085 46071 Valencia Spain
| | - Clara María Gómez
- Materials Science Institute; University of Valencia; PO Box 22085 46071 Valencia Spain
| | - Andrés Cantarero
- Materials Science Institute; University of Valencia; PO Box 22085 46071 Valencia Spain
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48
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Bruckmoser K, Resch K. Investigation of Ageing Mechanisms in Thermoplastic Polyurethanes by Means of IR and Raman Spectroscopy. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/masy.201300140] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Katharina Bruckmoser
- Materials Science and Testing of Polymers; University of Leoben; Otto Gloeckel-Strasse 2/II 8700 Leoben Austria
| | - Katharina Resch
- Materials Science and Testing of Polymers; University of Leoben; Otto Gloeckel-Strasse 2/II 8700 Leoben Austria
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49
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Jing X, Mi HY, Peng XF, Turng LS. The morphology, properties, and shape memory behavior of polylactic acid/thermoplastic polyurethane blends. POLYM ENG SCI 2014. [DOI: 10.1002/pen.23873] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xin Jing
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology; Guangzhou 510640 China
- Department of Mechanical Engineering and Wisconsin Institute for Discovery; University of Wisconsin-Madison; Madison Wisconsin 53706
| | - Hao-Yang Mi
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology; Guangzhou 510640 China
- Department of Mechanical Engineering and Wisconsin Institute for Discovery; University of Wisconsin-Madison; Madison Wisconsin 53706
| | - Xiang-Fang Peng
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology; Guangzhou 510640 China
| | - Lih-Sheng Turng
- Department of Mechanical Engineering and Wisconsin Institute for Discovery; University of Wisconsin-Madison; Madison Wisconsin 53706
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50
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Ghoreishi R, Zhao Y, Suppes GJ. Reaction modeling of urethane polyols using fraction primary secondary and hindered-secondary hydroxyl content. J Appl Polym Sci 2014. [DOI: 10.1002/app.40388] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rima Ghoreishi
- Department of Chemical Engineering; University of Missouri-Columbia; W2033 Lafferre Hall Columbia Missouri 65211
| | - Yusheng Zhao
- Department of Chemical Engineering; University of Missouri-Columbia; W2033 Lafferre Hall Columbia Missouri 65211
| | - Galen J. Suppes
- Department of Chemical Engineering; University of Missouri-Columbia; W2033 Lafferre Hall Columbia Missouri 65211
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