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Nguyen TD, Roh S, Nguyen MTN, Lee JS. Structural Control of Nanofibers According to Electrospinning Process Conditions and Their Applications. Micromachines (Basel) 2023; 14:2022. [PMID: 38004879 PMCID: PMC10673317 DOI: 10.3390/mi14112022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/20/2023] [Accepted: 10/28/2023] [Indexed: 11/26/2023]
Abstract
Nanofibers have gained much attention because of the large surface area they can provide. Thus, many fabrication methods that produce nanofiber materials have been proposed. Electrospinning is a spinning technique that can use an electric field to continuously and uniformly generate polymer and composite nanofibers. The structure of the electrospinning system can be modified, thus making changes to the structure, and also the alignment of nanofibers. Moreover, the nanofibers can also be treated, modifying the nanofiber structure. This paper thoroughly reviews the efforts to change the configuration of the electrospinning system and the effects of these configurations on the nanofibers. Excellent works in different fields of application that use electrospun nanofibers are also introduced. The studied materials functioned effectively in their application, thereby proving the potential for the future development of electrospinning nanofiber materials.
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Affiliation(s)
| | | | | | - Jun Seop Lee
- Department of Materials Science and Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-Gu, Seongnam-Si 13120, Gyeonggi-Do, Republic of Korea; (T.D.N.); (S.R.); (M.T.N.N.)
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2
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Mitrosz O, Kurpińska M, Miśkiewicz M, Brzozowski T, Abdelgader HS. Influence of the Addition of Recycled Aggregates and Polymer Fibers on the Properties of Pervious Concrete. Materials (Basel) 2023; 16:5222. [PMID: 37569930 PMCID: PMC10419802 DOI: 10.3390/ma16155222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/13/2023] [Accepted: 07/19/2023] [Indexed: 08/13/2023]
Abstract
The aim of the study was to check the possibility of reusing aggregate from recycled concrete waste and rubber granules from car tires as partial substitution of natural aggregate. The main objective was to investigate the effects of recycled waste aggregate modified with polymer fibers on the compressive and flexural strength, modulus of elasticity and permeability of pervious concrete. Fibers with a multifilament structure and length of 54 mm were deliberately used to strengthen the joints among grains (max size 31.5 mm). Eight batches of designed mixes were used in the production of pervious concrete at fixed water/binder ratio of 0.34 with cement content of 350 kg/m3. Results showed that the use of recycled concrete aggregate (8/31.5 mm) with replacement ratio of 50% (by weight of aggregate) improved the mechanical properties of pervious concrete in all analyzed cases. Whereas the replacement of 10% rubber waste aggregate (2/5 mm) by volume of aggregate reduced the compressive strength by a maximum of 11.4%. Addition of 2 kg/m3 of polymer fibers proved the strengthening effect of concrete structure, enhancing the compressive and tensile strengths by a maximum of 23.4% and 25.0%, respectively. The obtained test results demonstrate the possibility of using the recycled waste aggregates in decarbonization process of pervious concrete production, but further laboratory and field performance tests are needed.
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Affiliation(s)
- Oskar Mitrosz
- Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland; (O.M.); (M.M.)
| | - Marzena Kurpińska
- Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland; (O.M.); (M.M.)
| | - Mikołaj Miśkiewicz
- Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland; (O.M.); (M.M.)
| | - Tadeusz Brzozowski
- Keller Polska sp. z o.o., Poznańska 172, 05-850 Ożarów Mazowiecki, Poland;
| | - Hakim Salem Abdelgader
- Faculty of Engineering, Department of Civil Engineering, University of Tripoli, Tripoli 13932, Libya;
- Libyan Authority for Scientific Research, Tripoli P.O. Box 80045, Libya
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Palomar I, Barluenga G. Acoustic Assessment of Multiscale Porous Lime-Cement Mortars. Materials (Basel) 2022; 16:322. [PMID: 36614661 PMCID: PMC9822032 DOI: 10.3390/ma16010322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/09/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
Noise pollution is an issue of high concern in urban environments and current standards and regulations trend to increase acoustic insulation requirements concerning airborne noise control. The design and development of novel building materials with enhanced acoustic performance is an efficient solution to mitigate this problem. Their application as renders and plasters can improve the acoustic conditions of existing and brand-new buildings. This paper reports the acoustic performance of eleven multiscale porous lime-cement mortars (MP-LCM) with two types of fibers (cellulose and polypropylene), gap-graded sand, and three lightweight aggregates (expanded clay, perlite, and vermiculite). Gap-graded sand was replaced by 25 and 50% of lightweight aggregates. A volume of 1.5% and 3% of cellulose fibers were added. The experimental study involved a physical characterization of properties related to mortar porous microstructure, such as apparent density, open porosity accessible to water, capillarity absorption, and water vapor permeability. Mechanical properties, such as Young's modulus, compressibility modulus, and Poisson's ratio were evaluated with ultrasonic pulse transmission tests. Acoustic properties, such as acoustic absorption coefficient and global index of airborne noise transmission, were measured using reduced-scale laboratory tests. The influence of mortar composition and the effects of mass, homogeneity, and stiffness on acoustic properties was assessed. Mortars with lower density, lower vapor permeability, larger open porosity, and higher Young's and compressibility modulus showed an increase in sound insulation. The incorporation of lightweight aggregates increased sound insulation by up to 38% compared to the gap-graded sand reference mixture. Fibers slightly improved sound insulation, although a small fraction of cellulose fibers can quadruplicate noise absorption. The roughness of the exposed surface also affected sound transmission loss. A semi-quantitative multiscale model for acoustic performance, considering paste thickness, active void size, and connectivity of paste pores as key parameters, was proposed. It was observed that MP-LCM with enhanced sound insulation, slightly reduced sound absorption.
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Salam A, Hassan T, Jabri T, Riaz S, Khan A, Iqbal KM, Khan SU, Wasim M, Shah MR, Khan MQ, Kim IS. Electrospun Nanofiber-Based Viroblock/ZnO/PAN Hybrid Antiviral Nanocomposite for Personal Protective Applications. Nanomaterials (Basel) 2021; 11:nano11092208. [PMID: 34578527 PMCID: PMC8465428 DOI: 10.3390/nano11092208] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 08/17/2021] [Accepted: 08/24/2021] [Indexed: 11/24/2022]
Abstract
Designing novel antiviral personal protective equipment (PPE) is crucial for preventing viral infections such as COVID-19 in humans. Here, we fabricate an electrospun nanofiber-based Viroblock (VB)-loaded polyacrylonitrile (PAN)/zinc oxide (ZnO) hybrid nanocomposite for PPE applications. Five different concentrations of Viroblock (0.5%, 1.5%, 2.5%, 3.5%, and 5%) were added to PAN/ZnO solution and loaded for electrospinning. The developed samples reflected antibacterial activity of 92.59% and 88.64% against Staphylococcus aureus and Pseudomonas aeruginosa bacteria, respectively, with 5% VB loading. Moreover, a significant reduction in virus titer (37%) was observed with the 5% VB/PAN/ZnO nanofiber sheet. Hence, VB-loaded PAN/ZnO nanofibers have great potential to kill enveloped viruses such as influenzas and coronaviruses and could be the ideal candidate for the development of nanofiber-based PPE, such as facemasks and surgical gowns, which can play a key role in the protection of frontline health workers and the general public in the COVID-19 pandemic.
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Affiliation(s)
- Abdul Salam
- Nanotechnology Research Group, Department of Textile and Clothing, Faculty of Engineering and Technology, National Textile University Karachi Campus, Industrial Area Korangi, Karachi 74900, Pakistan; (A.S.); (T.H.)
| | - Tufail Hassan
- Nanotechnology Research Group, Department of Textile and Clothing, Faculty of Engineering and Technology, National Textile University Karachi Campus, Industrial Area Korangi, Karachi 74900, Pakistan; (A.S.); (T.H.)
| | - Tooba Jabri
- International Center for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi 75270, Pakistan; (T.J.); (K.M.I.); (M.R.S.)
| | - Shagufta Riaz
- Functional Textile Research Group, Department of Textile Engineering, National Textile University, Faisalabad 37610, Pakistan;
| | - Amina Khan
- Department of Chemistry, National Textile University, Faisalabad 37610, Pakistan;
| | - Kanwal Muhammad Iqbal
- International Center for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi 75270, Pakistan; (T.J.); (K.M.I.); (M.R.S.)
| | - Saif ullah Khan
- Department of Textile Engineering, Balochistan University of Information Technology Engineering and Management Sciences, Quetta 87100, Pakistan;
| | - Muhammad Wasim
- Key Laboratory of New Materials and Modification of Liaoning Province, School of Textile and Materials Engineering, Dalian Polytechnic University, Dalian 116034, China;
| | - Muhammad Raza Shah
- International Center for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi 75270, Pakistan; (T.J.); (K.M.I.); (M.R.S.)
| | - Muhammad Qamar Khan
- Nanotechnology Research Group, Department of Textile and Clothing, Faculty of Engineering and Technology, National Textile University Karachi Campus, Industrial Area Korangi, Karachi 74900, Pakistan; (A.S.); (T.H.)
- Correspondence: (M.Q.K.); (I.-S.K.); Tel.: +92-314-6300683 (M.Q.K.)
| | - Ick-Soo Kim
- Division of Frontier Fiber, Institute of Fiber Engineering, Interdisciplinary Cluster for Cutting Edge Research (ICCER), Faculty of Textile Sciences, Shinshu University, Tokida 3151, Ueda, Nagano 386 8567, Japan
- Correspondence: (M.Q.K.); (I.-S.K.); Tel.: +92-314-6300683 (M.Q.K.)
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Tertyshnaya Y, Karpova S, Moskovskiy M, Dorokhov A. Electrospun Polylactide/Natural Rubber Fibers: Effect Natural Rubber Content on Fiber Morphology and Properties. Polymers (Basel) 2021; 13:2232. [PMID: 34300990 DOI: 10.3390/polym13142232] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/30/2021] [Accepted: 07/05/2021] [Indexed: 11/25/2022] Open
Abstract
Non-woven polylactide-natural rubber fiber materials with a rubber content of 5, 10 and 15 wt.% were obtained by electrospinning. The thermal, dynamic, and mechanical properties of the fibers were determined. It was shown that the average fiber diameter increased with adding of the NR content, while the linear and surface densities changed slightly. Using the differential scanning calorimetry, the thermal characteristics were obtained. It was found that the glass transition temperature of polylactide increased by 2–5 °C, and the melting temperature increased by 2–4 °C in the presence of natural rubber in the samples. By the method of electronic paramagnetic resonance at T = 50 and 70 °C it was determined that the mobility of the amorphous phase in PLA/NR fibers increased with the addition of NR. The adding of NR at a content of 15 wt.% increased the value of elongation at break by 3.5 times compared to pure PLA.
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Lech M, Mastalska-Popławska J, Laska J. Fabrication of Polyurethane/Polylactide (PU/PLDL) Nanofibers Using Electrospinning Method. Materials (Basel) 2021; 14:ma14092459. [PMID: 34068487 PMCID: PMC8126013 DOI: 10.3390/ma14092459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/03/2021] [Accepted: 05/07/2021] [Indexed: 11/16/2022]
Abstract
Polylactide and aliphatic polyurethane are biodegradable synthetic polymers which are broadly used as biomaterials in regenerative medicine for implants and scaffolds for tissue engineering. In this paper, the detailed studies of the fabrication of the electrospun fibers of polyurethane/polylactide mixtures were described. The influence of the used solvent (dimethylformamide (DMF)) and diluents (acetone and dichloromethane (DCM)) on the rheological parameters and electrospinning of the described mixtures was examined. Rheological studies showed that polyure-thane/polylactide mixtures have mostly non-Newtonian character, strongly influenced by the diluent. Solutions containing 50 wt.% or more of polyurethane became less viscous after the addition of DCM or acetone, whereas those with bigger amount of polylactide showed higher viscosity after the addition of DCM and lower viscosity after the addition of acetone. Optimized electrospinning process has been elaborated. Fibers with diameters from 250 nm up to 1 µm have been produced and compared. Pure acetone worsened the electrospinning process, but the more DCM was in the mixture, the thinner and more aligned fibers were produced.
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Shafei B, Kazemian M, Dopko M, Najimi M. State-of-the-Art Review of Capabilities and Limitations of Polymer and Glass Fibers Used for Fiber-Reinforced Concrete. Materials (Basel) 2021; 14:409. [PMID: 33467581 DOI: 10.3390/ma14020409] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/02/2021] [Accepted: 01/05/2021] [Indexed: 11/16/2022]
Abstract
The concrete industry has long been adding discrete fibers to cementitious materials to compensate for their (relatively) low tensile strengths and control possible cracks. Extensive past studies have identified effective strategies to mix and utilize the discrete fibers, but as the fiber material properties advance, so do the properties of the cementitious composites made with them. Thus, it is critical to have a state-of-the-art understanding of not only the effects of individual fiber types on various properties of concrete, but also how those properties are influenced by changing the fiber type. For this purpose, the current study provides a detailed review of the relevant literature pertaining to different fiber types considered for fiber-reinforced concrete (FRC) applications with a focus on their capabilities, limitations, common uses, and most recent advances. To achieve this goal, the main fiber properties that are influential on the characteristics of cementitious composites in the fresh and hardened states are first investigated. The study is then extended to the stability of the identified fibers in alkaline environments and how they bond with cementitious matrices. The effects of fiber type on the workability, pre- and post-peak mechanical properties, shrinkage, and extreme temperature resistance of the FRC are explored as well. In offering holistic comparisons, the outcome of this study provides a comprehensive guide to properly choose and utilize the benefits of fibers in concrete, facilitating an informed design of various FRC products.
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Wang WC, Cheng YT, Estroff B. Electrostatic Self-Assembly of Composite Nanofiber Yarn. Polymers (Basel) 2020; 13:E12. [PMID: 33375138 DOI: 10.3390/polym13010012] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/19/2020] [Accepted: 12/20/2020] [Indexed: 11/29/2022] Open
Abstract
Electrospinning polymer fibers is a well-understood process primarily resulting in random mats or single strands. More recent systems and methods have produced nanofiber yarns (NFY) for ease of use in textiles. This paper presents a method of NFY manufacture using a simplified dry electrospinning system to produce self-assembling functional NFY capable of conducting electrical charge. The polymer is a mixture of cellulose nanocrystals (CNC), polyvinyl acrylate (PVA) and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). When treated with ethylene glycol (EG) to enhance conductivity, fibers touching the collector plate align to the applied electrostatic field and grow by twisting additional nanofiber polymers injected by the jet into the NFY bundle. The longer the electrospinning continues, the longer and more uniformly twisted the NFY becomes. This process has the added benefit of reducing the electric field required for NFY production from >2.43 kV cm−1 to 1.875 kV cm−1.
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Kupka V, Dvořáková E, Manakhov A, Michlíček M, Petruš J, Vojtová L, Zajíčková L. Well-Blended PCL/PEO Electrospun Nanofibers with Functional Properties Enhanced by Plasma Processing. Polymers (Basel) 2020; 12:polym12061403. [PMID: 32580496 PMCID: PMC7362260 DOI: 10.3390/polym12061403] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/11/2020] [Accepted: 06/17/2020] [Indexed: 12/31/2022] Open
Abstract
Biodegradable composite nanofibers were electrospun from poly(ε-caprolactone) (PCL) and poly(ethylene oxide) (PEO) mixtures dissolved in acetic and formic acids. The variation of PCL:PEO concentration in the polymer blend, from 5:95 to 75:25, revealed the tunability of the hydrolytic stability and mechanical properties of the nanofibrous mats. The degradation rate of PCL/PEO nanofibers can be increased compared to pure PCL, and the mechanical properties can be improved compared to pure PEO. Although PCL and PEO have been previously reported as immiscible, the electrospinning into nanofibers having restricted dimensions (250–450 nm) led to a microscopically mixed PCL/PEO blend. However, the hydrolytic stability and tensile tests revealed the segregation of PCL into few-nanometers-thin fibrils in the PEO matrix of each nanofiber. A synergy phenomenon of increased stiffness appeared for the high concentration of PCL in PCL/PEO nanofibrous mats. The pure PCL and PEO mats had a Young’s modulus of about 12 MPa, but the mats made of high concentration PCL in PCL/PEO solution exhibited 2.5-fold higher values. The increase in the PEO content led to faster degradation of mats in water and up to a 20-fold decrease in the nanofibers’ ductility. The surface of the PCL/PEO nanofibers was functionalized by an amine plasma polymer thin film that is known to increase the hydrophilicity and attach proteins efficiently to the surface. The combination of different PCL/PEO blends and amine plasma polymer coating enabled us to tune the surface functionality, the hydrolytic stability, and the mechanical properties of biodegradable nanofibrous mats.
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Affiliation(s)
- Vojtěch Kupka
- Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic; (V.K.); (J.P.); (L.V.)
- Regional Centre of Advanced Technologies and Materials and Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 Listopadu 12, 77900 Olomouc, Czech Republic
| | - Eva Dvořáková
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic; (E.D.); (A.M.); (M.M.)
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Anton Manakhov
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic; (E.D.); (A.M.); (M.M.)
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISiS”, Leninsky Prospect 4, 119049 Moscow, Russia
| | - Miroslav Michlíček
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic; (E.D.); (A.M.); (M.M.)
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Josef Petruš
- Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic; (V.K.); (J.P.); (L.V.)
- Institute of Materials Chemistry, Faculty of Chemistry, Brno University of Technology, Purkyňova 464/118, 61200 Brno, Czech Republic
| | - Lucy Vojtová
- Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic; (V.K.); (J.P.); (L.V.)
| | - Lenka Zajíčková
- Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic; (V.K.); (J.P.); (L.V.)
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic; (E.D.); (A.M.); (M.M.)
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
- Correspondence:
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Lee WJ, Paineau E, Anthony DB, Gao Y, Leese HS, Rouzière S, Launois P, Shaffer MSP. Inorganic Nanotube Mesophases Enable Strong Self-Healing Fibers. ACS Nano 2020; 14:5570-5580. [PMID: 32255336 PMCID: PMC7304920 DOI: 10.1021/acsnano.9b09873] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The assembly of one-dimensional nanomaterials into macroscopic fibers can improve mechanical as well as multifunctional performance. Double-walled aluminogermanate imogolite nanotubes are geo-inspired analogues of carbon nanotubes, synthesized at low temperature, with complementary properties. Here, continuous imogolite-based fibers are wet-spun within a poly(vinyl alcohol) matrix. The lyotropic liquid crystallinity of the system produces highly aligned fibers with tensile stiffness and strength up to 24.1 GPa (14.1 N tex-1) and 0.8 GPa (0.46 N tex-1), respectively. Significant enhancements over the pure polymer control are quantitatively attributed to both matrix refinement and direct nanoscale reinforcement, by fitting an analytical model. Most intriguingly, imogolite-based fibers show a high degree of healability via evaporation-induced self-assembly, recovering up to 44% and 19% of the original fiber tensile stiffness and strength, respectively. This recovery at high absolute strength highlights a general strategy for the development of high-performance healable fibers relevant to composite structures and other applications.
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Affiliation(s)
- Won Jun Lee
- Department of Materials,
Department of Chemistry, South Kensington Campus, Imperial College London, London, U.K. SW7 2AZ
| | - Erwan Paineau
- Laboratoire
de Physique des Solides, UMR CNRS 8502, Université Paris Sud, Université Paris Saclay, Bâtiment 510, Orsay, Île-de-France FR 91405, France
| | - David Benbow Anthony
- Department of Materials,
Department of Chemistry, South Kensington Campus, Imperial College London, London, U.K. SW7 2AZ
| | - Yulin Gao
- Department of Materials,
Department of Chemistry, South Kensington Campus, Imperial College London, London, U.K. SW7 2AZ
| | - Hannah Siobhan Leese
- Department of Materials,
Department of Chemistry, South Kensington Campus, Imperial College London, London, U.K. SW7 2AZ
| | - Stéphan Rouzière
- Laboratoire
de Physique des Solides, UMR CNRS 8502, Université Paris Sud, Université Paris Saclay, Bâtiment 510, Orsay, Île-de-France FR 91405, France
| | - Pascale Launois
- Laboratoire
de Physique des Solides, UMR CNRS 8502, Université Paris Sud, Université Paris Saclay, Bâtiment 510, Orsay, Île-de-France FR 91405, France
| | - Milo Sebastian Peter Shaffer
- Department of Materials,
Department of Chemistry, South Kensington Campus, Imperial College London, London, U.K. SW7 2AZ
- E-mail:
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Halabi M, Mann-Lahav M, Beilin V, Shter GE, Elishav O, Grader GS, Dekel DR. Electrospun Anion-Conducting Ionomer Fibers-Effect of Humidity on Final Properties. Polymers (Basel) 2020; 12:E1020. [PMID: 32369925 PMCID: PMC7284427 DOI: 10.3390/polym12051020] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/27/2020] [Accepted: 04/27/2020] [Indexed: 11/16/2022] Open
Abstract
Anion-conducting ionomer-based nanofibers mats are prepared by electrospinning (ES) technique. Depending on the relative humidity (RH) during the ES process (RHES), ionomer nanofibers with different morphologies are obtained. The effect of relative humidity on the ionomer nanofibers morphology, ionic conductivity, and water uptake (WU) is studied. A branching effect in the ES fibers found to occur mostly at RHES < 30% is discussed. The anion conductivity and WU of the ionomer electrospun mats prepared at the lowest RHES are found to be higher than in those prepared at higher RHES. This effect can be ascribed to the large diameter of the ionomer fibers, which have a higher WU. Understanding the effect of RH during the ES process on ionomer-based fibers' properties is critical for the preparation of electrospun fiber mats for specific applications, such as electrochemical devices.
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Affiliation(s)
- Manar Halabi
- The Wolfson Department of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel; (M.H.); (M.M.-L.); (V.B.); (G.E.S.); (O.E.)
| | - Meirav Mann-Lahav
- The Wolfson Department of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel; (M.H.); (M.M.-L.); (V.B.); (G.E.S.); (O.E.)
| | - Vadim Beilin
- The Wolfson Department of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel; (M.H.); (M.M.-L.); (V.B.); (G.E.S.); (O.E.)
| | - Gennady E. Shter
- The Wolfson Department of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel; (M.H.); (M.M.-L.); (V.B.); (G.E.S.); (O.E.)
| | - Oren Elishav
- The Wolfson Department of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel; (M.H.); (M.M.-L.); (V.B.); (G.E.S.); (O.E.)
- The Nancy & Stephan Grand Technion Energy Program (GTEP), Technion, Israel Institute of Technology, Haifa 3200003, Israel
| | - Gideon S. Grader
- The Wolfson Department of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel; (M.H.); (M.M.-L.); (V.B.); (G.E.S.); (O.E.)
- The Nancy & Stephan Grand Technion Energy Program (GTEP), Technion, Israel Institute of Technology, Haifa 3200003, Israel
| | - Dario R. Dekel
- The Wolfson Department of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel; (M.H.); (M.M.-L.); (V.B.); (G.E.S.); (O.E.)
- The Nancy & Stephan Grand Technion Energy Program (GTEP), Technion, Israel Institute of Technology, Haifa 3200003, Israel
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Zalegowski K, Piotrowski T, Garbacz A. influence of polymer modification on the microstructure of shielding concrete. Materials (Basel) 2020; 13:ma13030498. [PMID: 31972999 PMCID: PMC7040696 DOI: 10.3390/ma13030498] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/10/2020] [Accepted: 01/19/2020] [Indexed: 11/16/2022]
Abstract
In this paper an analysis of the influence of polymer modification on the microstructure, shielding properties against neutrons, and compressive strength of heavy-weight magnetite concrete is carried out. The modifications involve the addition of acrylic or epoxy dispersions as well as micro- or/and macrofibers. A computer image analysis method is used to evaluate the microstructure of concretes and parameters of pore structure are calculated; these parameters include relative volume fraction, relative specific surface area, and pore arrangement ratios, including a proprietary ratio based on Voronoi tessellation. An assessment of significance of differences between stereological parameters of reference concrete and polymer modified concretes, as well as the impact of polymer form (dispersion or fibers) on shielding properties and compressive strength is carried out using Student's t-test. The results show that except for the effect of the addition of both polypropylene micro- and macrofibers on the relative volume of pores, all other modifications result in statistically significant changes in the values of stereological parameters. Nevertheless, it is shown that neither polymer dispersions nor fibers have a statistically significant impact on shielding properties, but that they do influence compressive strength.
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13
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Ponomarev II, Skvortsov IY, Volkova YA, Ponomarev II, Varfolomeeva LA, Razorenov DY, Skupov KM, Kuzin MS, Serenko OA. New Approach to Preparation of Heat-Resistant "Lola-M" Fiber. Materials (Basel) 2019; 12:ma12213490. [PMID: 31731389 PMCID: PMC6862234 DOI: 10.3390/ma12213490] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/17/2019] [Accepted: 10/22/2019] [Indexed: 11/18/2022]
Abstract
A new approach to the synthesis of polynaphthoylenebenzimidazoles and heat resistant fiber spinning has been developed using an environmentally friendly and energy efficient method, which operates with solutions of pre-polymers based on 3,3’,4,4’-tetraaminodiphenyl ether and 1,4,5,8-naphthalenetetracarboxylic acid dianhydride in N-methylpyrrolidone. Rheological properties of polymer reaction solutions and appropriate coagulant mixtures were investigated for further wet spinning process. The coagulation process was investigated through microscopic observation of solution droplets which imitate jet/fiber cross section surrounded with coagulants of different composition. For the case of the most optimal viscoelastic properties of dopes the best coagulant was found to be a ternary mixture ethanol/water/NMP (20/10/70). Fibers were prepared through the wet spinning from pre-polymers of various molecular weight characterized by intrinsic viscosity. As a result, complex yarns were spun, and their morphology was characterized and mechanical properties were measured. The strength of ~300 MPa and elastic modulus of ~2 GPa and elongation at break of ~20% were reached for the best fibers at average diameter of ~20 µm. After heat treatment “Lola-M” fibers do not burn and do not support combustion in open flame.
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Affiliation(s)
- Igor I. Ponomarev
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St., 28, Moscow 119991, Russia
- Correspondence: (I.I.P.); (K.M.S.)
| | - Ivan Y. Skvortsov
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av., 29, Moscow 119991, Russia; (I.Y.S.)
| | - Yulia A. Volkova
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St., 28, Moscow 119991, Russia
| | - Ivan I. Ponomarev
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St., 28, Moscow 119991, Russia
| | - Lydia A. Varfolomeeva
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av., 29, Moscow 119991, Russia; (I.Y.S.)
| | - Dmitry Y. Razorenov
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St., 28, Moscow 119991, Russia
| | - Kirill M. Skupov
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St., 28, Moscow 119991, Russia
- Correspondence: (I.I.P.); (K.M.S.)
| | - Mikhail S. Kuzin
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av., 29, Moscow 119991, Russia; (I.Y.S.)
| | - Olga A. Serenko
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St., 28, Moscow 119991, Russia
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14
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Lafleur SD, Severn JR, Verpaalen RCP, Schenning APHJ, Bastiaansen CWM. Rewritable Optical Patterns in Light-Responsive Ultrahigh Molecular Weight Polyethylene. ACS Appl Polym Mater 2019; 1:392-396. [PMID: 30923798 PMCID: PMC6433162 DOI: 10.1021/acsapm.8b00117] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 01/31/2019] [Indexed: 05/22/2023]
Abstract
Spiropyran is used as a photochromic dye to create colored patterns in highly drawn ultrahigh molecular weight polyethylene (UHMW PE) films. The dye is incorporated in highly crystalline, drawn UHMW PE tapes and fibers and isomerizes to its merocyanine state upon UV light irradiation, resulting in a color change from transparent to purple. The isomerization from merocyanine to spiropyran to erase the color can be simply induced by using heat or a green LED light. The combination of the use of a mask and the reversibility of the isomerization results in colored patterns that can be written, erased, and rewritten using UV light and heat or green LED light.
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Affiliation(s)
- Sarah
S. D. Lafleur
- Laboratory
of Stimuli-responsive Functional Materials and Devices, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600 MB, The Netherlands
| | - John R. Severn
- DSM
Material Science Center, Urmonderbaan 22, 6167RD Geleen, The Netherlands
| | - Rob C. P. Verpaalen
- Laboratory
of Stimuli-responsive Functional Materials and Devices, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600 MB, The Netherlands
| | - Albert P. H. J. Schenning
- Laboratory
of Stimuli-responsive Functional Materials and Devices, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600 MB, The Netherlands
| | - Cees W. M. Bastiaansen
- Laboratory
of Stimuli-responsive Functional Materials and Devices, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600 MB, The Netherlands
- School
of Engineering and Materials Science, Queen Mary, University of London, London E1 4NS, U.K.
- E-mail:
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15
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Papagiorgis PG, Manoli A, Alexiou A, Karacosta P, Karagiorgis X, Papaparaskeva G, Bernasconi C, Bodnarchuk MI, Kovalenko MV, Krasia-Christoforou T, Itskos G. Robust Hydrophobic and Hydrophilic Polymer Fibers Sensitized by Inorganic and Hybrid Lead Halide Perovskite Nanocrystal Emitters. Front Chem 2019; 7:87. [PMID: 30863744 PMCID: PMC6399309 DOI: 10.3389/fchem.2019.00087] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/31/2019] [Indexed: 11/13/2022] Open
Abstract
Advances in the technology and processing of flexible optical materials have paved the way toward the integration of semiconductor emitters and polymers into functional light emitting fabrics. Lead halide perovskite nanocrystals appear as highly suitable optical sensitizers for such polymer fiber emitters due to their ease of fabrication, versatile solution-processing and highly efficient, tunable, and narrow emission across the visible spectrum. A beneficial byproduct of the nanocrystal incorporation into the polymer matrix is that it provides a facile and low-cost method to chemically and structurally stabilize the perovskite nanocrystals under ambient conditions. Herein, we demonstrate two types of robust fiber composites based on electrospun hydrophobic poly(methyl methacrylate) (PMMA) or hydrophilic polyvinylpyrrolidone (PVP) fibrous membranes sensitized by green-emitting all-inorganic CsPbBr3 or hybrid organic-inorganic FAPbBr3 nanocrystals. We perform a systematic investigation on the influence of the nanocrystal-polymer relative content on the structural and optical properties of the fiber nanocomposites and we find that within a wide content range, the nanocrystals retain their narrow and high quantum yield emission upon incorporation into the polymer fibers. Quenching of the radiative recombination at the higher/lower bound of the nanocrystal:polymer mass ratio probed is discussed in terms of nanocrystal clustering/ligand desorption due to dilution effects, respectively. The nanocomposite's optical stability over an extended exposure in air and upon immersion in water is also discussed. The studies confirm the demonstration of robust and bright polymer-fiber emitters with promising applications in backlighting for LCD displays and textile-based light emitting devices.
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Affiliation(s)
- Paris G. Papagiorgis
- Experimental Condensed Matter Physics Laboratory, Department of Physics, University of Cyprus, Nicosia, Cyprus
| | - Andreas Manoli
- Experimental Condensed Matter Physics Laboratory, Department of Physics, University of Cyprus, Nicosia, Cyprus
| | - Androniki Alexiou
- Experimental Condensed Matter Physics Laboratory, Department of Physics, University of Cyprus, Nicosia, Cyprus
| | - Petroula Karacosta
- Experimental Condensed Matter Physics Laboratory, Department of Physics, University of Cyprus, Nicosia, Cyprus
| | - Xenofon Karagiorgis
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, Cyprus
| | - Georgia Papaparaskeva
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, Cyprus
| | - Caterina Bernasconi
- Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
- Laboratory for Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zurich, Switzerland
| | - Maryna I. Bodnarchuk
- Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
- Laboratory for Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zurich, Switzerland
| | - Maksym V. Kovalenko
- Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
- Laboratory for Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zurich, Switzerland
| | | | - Grigorios Itskos
- Experimental Condensed Matter Physics Laboratory, Department of Physics, University of Cyprus, Nicosia, Cyprus
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16
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Rega R, Gennari O, Mecozzi L, Pagliarulo V, Bramanti A, Ferraro P, Grilli S. Maskless Arrayed Nanofiber Mats by Bipolar Pyroelectrospinning. ACS Appl Mater Interfaces 2019; 11:3382-3387. [PMID: 30609347 DOI: 10.1021/acsami.8b12513] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The numerous advantages of micro- and nanostructures produced by electrospinning (ES) have stimulated enormous interest in this technology with potential application in several fields. However, ES still has some limitations in controlling the geometrical arrangement of the fiber mats so that expensive and time-consuming technologies are usually employed for producing ordered geometries. Here we present a technique that we call "bipolar pyroelectrospinning" (b-PES) for generating ordered arrays of fiber mats in a direct manner by using the bipolar pyroelectric field produced by a periodically poled lithium niobate crystal (PPLN). The b-PES is free from expensive electrodes, nozzles, and masks because it makes use simply of the structured pyroelectric field produced by the PPLN crystal used as collector. The results show clearly the reliability of the technique in producing a wide variety of arrayed fiber mats that could find application in bioengineering or many other fields. Preliminary results of live cells patterning under controlled geometrical constraints is also reported and discussed in order to show potential exploitation as a scaffold in tissue engineering.
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Affiliation(s)
- Romina Rega
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Oriella Gennari
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Laura Mecozzi
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Vito Pagliarulo
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Alessia Bramanti
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
- IRCCS Centro Neurolesi "Bonino-Pulejo" , Contrada Casazza SS113 , 98124 Messina , Italy
| | - Pietro Ferraro
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Simonetta Grilli
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
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17
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Statkiewicz-Barabach G, Tarnowski K, Kowal D, Mergo P. Experimental Analysis of Bragg Reflection Peak Splitting in Gratings Fabricated Using a Multiple Order Phase Mask. Sensors (Basel) 2019; 19:s19020433. [PMID: 30669654 PMCID: PMC6358920 DOI: 10.3390/s19020433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/06/2019] [Accepted: 01/18/2019] [Indexed: 06/09/2023]
Abstract
We performed an experimental analysis of the effect of phase mask alignment on the Bragg grating reflection spectra around the wavelength of λB = 1560 nm fabricated in polymer optical fiber by using a multiple order phase mask. We monitored the evolution of the reflection spectra for different values of the angle ϕ by describing the tilt between the phase mask and the fiber. We observed that the peak at λB is split into five separate peaks for the nonzero tilt and that separation of the peaks increases linearly with ϕ. Through comparison with theoretical data we were able to identify the five peaks as products of different grating periodicities, which are associated with the interference of different pairs of diffraction orders on the phase mask.
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Affiliation(s)
- Gabriela Statkiewicz-Barabach
- Department of Optics and Photonics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.
| | - Karol Tarnowski
- Department of Optics and Photonics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.
| | - Dominik Kowal
- Department of Optics and Photonics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.
| | - Pawel Mergo
- Laboratory of Optical Fiber Technology, Maria Curie-Sklodowska University, pl. M. Curie-Sklodowskiej 3, 20-031 Lublin, Poland.
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18
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Guselnikova O, Elashnikov R, Postnikov P, Svorcik V, Lyutakov O. Smart, Piezo-Responsive Polyvinylidenefluoride/Polymethylmethacrylate Surface with Triggerable Water/Oil Wettability and Adhesion. ACS Appl Mater Interfaces 2018; 10:37461-37469. [PMID: 30226740 DOI: 10.1021/acsami.8b06840] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The design of smart surfaces with externally triggerable water/oil wettability and adhesion represents one of the most up-to-date challenges in the field of material science. In this work, the intelligent surface with electrically triggerable wettability and water/oil adhesion is presented. As a basic material background exhibiting electric field (EF) sensitivity, the piezo-responsive polymethylmethacrylate/polyvinylidenefluoride polymer fibers were used. To expand the available range of water/oil contact angles (CAs) and adhesion, the fibers were grafted with hydrophilic or hydrophobic functional groups using diazonium chemistry. The fiber functionality was evaluated using the static CA and wettability hysteresis measurements (increasing/decreasing drop volume and tilting angles), drops adhesion/repellence and graphite self-cleaning test performed with and without the application of EF. It was found that the proposed method enables tuning the surface wettability in the superhydrophobic/superoleophobic-hydrophilic/oleophilic range and changing of surface properties from low adhesive to high adhesive for water and oil. More convincing results were achieved in the case of fiber surface modification by ADT-C8F17, which may result from a rearrangement of the grated -C6H4C8F17 functional group under the application of EF triggering. Moreover, the triggering which can be performed in the extremely fast way (the surface responds to the EF switching on/off in seconds) was found to be fully reversible. Finally, the additional tests indicate the satisfactory stability of created fiber-based coating against the mechanical treatment.
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Affiliation(s)
- Olga Guselnikova
- Department of Solid State Engineering , Institute of Chemical Technology , 16628 Prague , Czech Republic
- Research School of Chemistry and Applied Biomedical Sciences , Tomsk Polytechnic University , Tomsk 634050 , Russian Federation
| | - Roman Elashnikov
- Department of Solid State Engineering , Institute of Chemical Technology , 16628 Prague , Czech Republic
| | - Pavel Postnikov
- Research School of Chemistry and Applied Biomedical Sciences , Tomsk Polytechnic University , Tomsk 634050 , Russian Federation
| | - Vaclav Svorcik
- Department of Solid State Engineering , Institute of Chemical Technology , 16628 Prague , Czech Republic
| | - Oleksiy Lyutakov
- Department of Solid State Engineering , Institute of Chemical Technology , 16628 Prague , Czech Republic
- Research School of Chemistry and Applied Biomedical Sciences , Tomsk Polytechnic University , Tomsk 634050 , Russian Federation
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19
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Liao S, Bai X, Song J, Zhang Q, Ren J, Zhao Y, Wu H. Draw-Spinning of Kilometer-Long and Highly Stretchable Polymer Submicrometer Fibers. Adv Sci (Weinh) 2017; 4:1600480. [PMID: 28932657 PMCID: PMC5604378 DOI: 10.1002/advs.201600480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 12/15/2016] [Indexed: 05/31/2023]
Abstract
A new method is developed to directly spinning perfectly uniaxial fibers in an ultrafast manner. Besides, this method can tune the fibers' diameter through adjusting processing parameters such as the feeding rate of precursors. Uniaxial nylon 66 fibers prepared via this method show superior mechanical properties due to the alignment in each level of the structure.
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Affiliation(s)
- Suiyang Liao
- State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China
| | - Xiaopeng Bai
- State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China
| | - Jianan Song
- State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China
| | - Qingyun Zhang
- State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China
| | - Jie Ren
- State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China
| | - Yusen Zhao
- State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China
| | - Hui Wu
- State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China
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20
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Chandrawati R, Olesen MTJ, Marini TCC, Bisra G, Guex AG, de Oliveira MG, Zelikin AN, Stevens MM. Enzyme Prodrug Therapy Engineered into Electrospun Fibers with Embedded Liposomes for Controlled, Localized Synthesis of Therapeutics. Adv Healthc Mater 2017; 6:10.1002/adhm.201700385. [PMID: 28699219 PMCID: PMC5590711 DOI: 10.1002/adhm.201700385] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 05/31/2017] [Indexed: 12/11/2022]
Abstract
Enzyme prodrug therapy (EPT) enables localized conversion of inert prodrugs to active drugs by enzymes. Performance of EPT necessitates that the enzyme remains active throughout the time frame of the envisioned therapeutic application. β-glucuronidase is an enzyme with historically validated performance in EPT, however it retains its activity in biomaterials for an insufficiently long period of time, typically not exceeding 7 d. Herein, the encapsulation of β-glucuronidase in liposomal subcompartments within poly(vinyl alcohol) electrospun fibers is reported, leading to the assembly of biocatalytically active materials with activity of the enzyme sustained over at least seven weeks. It is further shown that liposomes provide the highly beneficial stabilization of the enzyme when incubated in cell culture media. The assembled biocatalytic materials successfully produce antiproliferative drugs (SN-38) using externally administered prodrugs (SN-38-glucuronide) and effectively suppress cell proliferation, with envisioned utility in the design of cardiovascular grafts.
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Affiliation(s)
- Rona Chandrawati
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Morten T. J. Olesen
- Department of Chemistry and iNANO Interdisciplinary Nanoscience Center, Aarhus University, Aarhus C 8000, Denmark
| | - Thatiane C. C. Marini
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, 13083-970, São Paulo, Brazil
| | - Gurpal Bisra
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Anne Géraldine Guex
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Marcelo G. de Oliveira
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, 13083-970, São Paulo, Brazil
| | - Alexander N. Zelikin
- Department of Chemistry and iNANO Interdisciplinary Nanoscience Center, Aarhus University, Aarhus C 8000, Denmark
| | - Molly M. Stevens
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
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21
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Raja SN, Olson ACK, Limaye A, Thorkelsson K, Luong A, Lin L, Ritchie RO, Xu T, Alivisatos AP. Influence of three-dimensional nanoparticle branching on the Young's modulus of nanocomposites: Effect of interface orientation. Proc Natl Acad Sci U S A 2015; 112:6533-8. [PMID: 25971729 PMCID: PMC4450427 DOI: 10.1073/pnas.1421644112] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
With the availability of nanoparticles with controlled size and shape, there has been renewed interest in the mechanical properties of polymer/nanoparticle blends. Despite the large number of theoretical studies, the effect of branching for nanofillers tens of nanometers in size on the elastic stiffness of these composite materials has received limited attention. Here, we examine the Young's modulus of nanocomposites based on a common block copolymer (BCP) blended with linear nanorods and nanoscale tetrapod Quantum Dots (tQDs), in electrospun fibers and thin films. We use a phenomenological lattice spring model (LSM) as a guide in understanding the changes in the Young's modulus of such composites as a function of filler shape. Reasonable agreement is achieved between the LSM and the experimental results for both nanoparticle shapes--with only a few key physical assumptions in both films and fibers--providing insight into the design of new nanocomposites and assisting in the development of a qualitative mechanistic understanding of their properties. The tQDs impart the greatest improvements, enhancing the Young's modulus by a factor of 2.5 at 20 wt.%. This is 1.5 times higher than identical composites containing nanorods. An unexpected finding from the simulations is that both the orientation of the nanoscale filler and the orientation of X-type covalent bonds at the nanoparticle-ligand interface are important for optimizing the mechanical properties of the nanocomposites. The tQD provides an orientational optimization of the interfacial and filler bonds arising from its three-dimensional branched shape unseen before in nanocomposites with inorganic nanofillers.
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Affiliation(s)
- Shilpa N Raja
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720; Departments of Materials Science and Engineering
| | | | | | - Kari Thorkelsson
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720; Departments of Materials Science and Engineering
| | | | - Liwei Lin
- Mechanical Engineering, University of California, Berkeley, CA 94720; and
| | - Robert O Ritchie
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720; Departments of Materials Science and Engineering, Mechanical Engineering, University of California, Berkeley, CA 94720; and
| | - Ting Xu
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720; Departments of Materials Science and Engineering, Chemistry
| | - A Paul Alivisatos
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720; Departments of Materials Science and Engineering, Chemical Engineering, and Kavli Energy NanoScience Institute, Berkeley, CA 94720
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22
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Daniele MA, Boyd DA, Adams AA, Ligler FS. Microfluidic strategies for design and assembly of microfibers and nanofibers with tissue engineering and regenerative medicine applications. Adv Healthc Mater 2015; 4:11-28. [PMID: 24853649 DOI: 10.1002/adhm.201400144] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 04/25/2014] [Indexed: 01/04/2023]
Abstract
Fiber-based materials provide critical capabilities for biomedical applications. Microfluidic fiber fabrication has recently emerged as a very promising route to the synthesis of polymeric fibers at the micro and nanoscale, providing fine control over fiber shape, size, chemical anisotropy, and biological activity. This Progress Report summarizes advanced microfluidic methods for the fabrication of both microscale and nanoscale fibers and illustrates how different methods are enabling new biomedical applications. Microfluidic fabrication methods and resultant materials are explained from the perspective of their microfluidic device principles, including co-flow, cross-flow, and flow-shaping designs. It is then detailed how the microchannel design and flow parameters influence the variety of synthesis chemistries that can be utilized. Finally, the integration of biomaterials and microfluidic strategies is discussed to manufacture unique fiber-based systems, including cell scaffolds, cell encapsulation, and woven tissue matrices.
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Affiliation(s)
- Michael A. Daniele
- Center for Bio/Molecular Science and Engineering; Naval Research Laboratory; 4555 Overlook Ave. SW Washington D.C. 20375 USA
| | - Darryl A. Boyd
- Center for Bio/Molecular Science and Engineering; Naval Research Laboratory; 4555 Overlook Ave. SW Washington D.C. 20375 USA
| | - André A. Adams
- Center for Bio/Molecular Science and Engineering; Naval Research Laboratory; 4555 Overlook Ave. SW Washington D.C. 20375 USA
| | - Frances S. Ligler
- Department of Biomedical Engineering; University of North Carolina, Chapel Hill and North Carolina State University; Mail Stop 7115 Raleigh NC 27965-7115 USA
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Persano L, Dagdeviren C, Maruccio C, De Lorenzis L, Pisignano D. Cooperativity in the enhanced piezoelectric response of polymer nanowires. Adv Mater 2014; 26:7574-80. [PMID: 25355372 PMCID: PMC4282026 DOI: 10.1002/adma.201403169] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 08/23/2014] [Indexed: 05/22/2023]
Abstract
Multilayered, aligned arrays of organic nanowires show unique advantages in their piezoelectric response. Here, the cooperative, electromechanical mechanism at the base of the enhanced response of aligned arrays of piezoelectric nanostructures in mutual contact is unveiled. An enhancement of the piezoelectric voltage by two orders of magnitude compared with individual nanofibers is demonstrated in the arrays.
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Affiliation(s)
- Luana Persano
- National Nanotechnology Laboratory of Istituto Nanoscienze-CNR, Via Arnesano, I-73100, Lecce, Italy
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Persano L, Camposeo A, Del Carro P, Fasano V, Moffa M, Manco R, D'Agostino S, Pisignano D. Distributed feedback imprinted electrospun fiber lasers. Adv Mater 2014; 26:6542-7. [PMID: 25042888 DOI: 10.1002/adma.201401945] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/07/2014] [Indexed: 05/22/2023]
Abstract
Imprinted, distributed feedback lasers are demonstrated on individual, active electrospun polymer nanofibers. In addition to advantages related to miniaturization, optical confinement and grating nanopatterning lead to a significant threshold reduction compared to conventional thin-film lasers. The possibility of imprinting arbitrary photonic crystal geometries on electrospun lasing nanofibers opens new opportunities for realizing optical circuits and chips.
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Affiliation(s)
- Luana Persano
- National Nanotechnology Laboratory of Istituto Nanoscienze-CNR, via Arnesano, I-73100, Lecce, Italy; Center for Biomolecular Nanotechnologies @UNILE, Istituto Italiano di Tecnologia, via Barsanti, I-73010, Arnesano, LE, Italy
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