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Vicente A, Rivero PJ, Rehfeld N, Stake A, García P, Carreño F, Mora J, Rodríguez R. Icephobic Coating Based on Novel SLIPS Made of Infused PTFE Fibers for Aerospace Application. Polymers (Basel) 2024; 16:571. [PMID: 38475256 DOI: 10.3390/polym16050571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/01/2024] [Accepted: 02/17/2024] [Indexed: 03/14/2024] Open
Abstract
The development of slippery surfaces has been widely investigated due to their excellent icephobic properties. A distinct kind of an ice-repellent structure known as a slippery liquid-infused porous surface (SLIPS) has recently drawn attention due to its simplicity and efficacy as a passive ice-protection method. These surfaces are well known for exhibiting very low ice adhesion values (τice < 20 kPa). In this study, pure Polytetrafluoroethylene (PTFE) fibers were fabricated using the electrospinning process to produce superhydrophobic (SHS) porous coatings on samples of the aeronautical alloy AA6061-T6. Due to the high fluorine-carbon bond strength, PTFE shows high resistance and chemical inertness to almost all corrosive reagents as well as extreme hydrophobicity and high thermal stability. However, these unique properties make PTFE difficult to process. For this reason, to develop PTFE fibers, the electrospinning technique has been used by an PTFE nanoparticles (nP PTFE) dispersion with addition of a very small amount of polyethylene oxide (PEO) followed with a sintering process (380 °C for 10 min) to melt the nP PTFE together and form uniform fibers. Once the porous matrix of PTFE fibers is attached, lubricating oil is added into the micro/nanoscale structure in the SHS in place of air to create a SLIPS. The experimental results show a high-water contact angle (WCA) ≈ 150° and low roll-off angle (αroll-off) ≈ 22° for SHS porous coating and a decrease in the WCA ≈ 100° and a very low αroll-off ≈ 15° for SLIPS coating. On one hand, ice adhesion centrifuge tests were conducted for two types of icing conditions (glaze and rime) accreted in an ice wind tunnel (IWT), as well as static ice at different ice adhesion centrifuge test facilities in order to compare the results for SHS, SLIPs and reference materials. This is considered a preliminary step in standardization efforts where similar performance are obtained. On the other hand, the ice adhesion results show 65 kPa in the case of SHS and 4.2 kPa of SLIPS for static ice and <10 kPa for rime and glace ice. These results imply a significant improvement in this type of coatings due to the combined effect of fibers PTFE and silicon oil lubricant.
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Affiliation(s)
- Adrián Vicente
- Engineering Department, Campus de Arrosadía S/N, Public University of Navarre, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT2), Campus de Arrosadía S/N, Public University of Navarre, 31006 Pamplona, Spain
- Departmet Paint Technology, Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), 28359 Bremen, Germany
| | - Pedro J Rivero
- Engineering Department, Campus de Arrosadía S/N, Public University of Navarre, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT2), Campus de Arrosadía S/N, Public University of Navarre, 31006 Pamplona, Spain
| | - Nadine Rehfeld
- Departmet Paint Technology, Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), 28359 Bremen, Germany
| | - Andreas Stake
- Departmet Paint Technology, Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), 28359 Bremen, Germany
| | - Paloma García
- INTA-Instituto Nacional de Técnica Aeroespacial, Área de Materiales Metálicos, Ctra. Ajalvir km 4, 28850 Torrejón de Ardoz, Spain
| | - Francisco Carreño
- INTA-Instituto Nacional de Técnica Aeroespacial, Área de Materiales Metálicos, Ctra. Ajalvir km 4, 28850 Torrejón de Ardoz, Spain
| | - Julio Mora
- INTA-Instituto Nacional de Técnica Aeroespacial, Área de Materiales Metálicos, Ctra. Ajalvir km 4, 28850 Torrejón de Ardoz, Spain
| | - Rafael Rodríguez
- Engineering Department, Campus de Arrosadía S/N, Public University of Navarre, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT2), Campus de Arrosadía S/N, Public University of Navarre, 31006 Pamplona, Spain
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Ben J, Wu P, Wang Y, Liu J, Luo Y. Preparation and Characterization of Modified ZrO 2/SiO 2/Silicone-Modified Acrylic Emulsion Superhydrophobic Coating. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7621. [PMID: 38138763 PMCID: PMC10744588 DOI: 10.3390/ma16247621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/09/2023] [Accepted: 12/11/2023] [Indexed: 12/24/2023]
Abstract
Superhydrophobic coatings have increasingly become the focal point of research due to their distinctive properties like water resistance, wear resistance, and acid-base resilience. In pursuit of maximizing their efficiency, research has primarily revolved around refining the fabrication process and the composition of emulsion/nanoparticle coatings. We innovatively devised a superhydrophobic coating by employing a spraying technique. This involved integrating a γ-Methacryloyloxypropyltrimethoxysilane (KH570)-modified ZrO2/SiO2/silicone-modified acrylic emulsion. A comprehensive evaluation of this coating was undertaken using analytical instruments such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and confocal laser scanning microscopy (CLSM). The coating demonstrated exceptional performance across a range of tests, including wear, immersion, and anti-icing cleaning, showcasing notable wear resistance, sodium chloride corrosion resistance, self-cleaning efficiency, and thermal stability. In particular, one coating exhibited super-hydrophobic properties, with a high contact angle of 158.5 degrees and an impressively low rolling angle of 1.85 degrees. This remarkable combination of properties is attributed to the judicious selection of components, which significantly reinforced the mechanical strength of the coating. These enhancements make it highly suitable for industrial applications where self-cleaning, anti-icing, and anti-contamination capabilities are critical.
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Affiliation(s)
- Jiaxin Ben
- College of 2011, Nanjing Tech University, Nanjing 211800, China
| | - Peipei Wu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China
| | - Yancheng Wang
- College of 2011, Nanjing Tech University, Nanjing 211800, China
| | - Jie Liu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China
| | - Yali Luo
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China
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3
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Cimini A, Borgioni A, Passarini E, Mancini C, Proietti A, Buccini L, Stornelli E, Schifano E, Dinarelli S, Mura F, Sergi C, Bavasso I, Cortese B, Passeri D, Imperi E, Rinaldi T, Picano A, Rossi M. Upscaling of Electrospinning Technology and the Application of Functionalized PVDF-HFP@TiO 2 Electrospun Nanofibers for the Rapid Photocatalytic Deactivation of Bacteria on Advanced Face Masks. Polymers (Basel) 2023; 15:4586. [PMID: 38231986 PMCID: PMC10708761 DOI: 10.3390/polym15234586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/25/2023] [Accepted: 11/28/2023] [Indexed: 01/19/2024] Open
Abstract
In recent years, Electrospinning (ES) has been revealed to be a straightforward and innovative approach to manufacture functionalized nanofiber-based membranes with high filtering performance against fine Particulate Matter (PM) and proper bioactive properties. These qualities are useful for tackling current issues from bacterial contamination on Personal Protective Equipment (PPE) surfaces to the reusability of both disposable single-use face masks and respirator filters. Despite the fact that the conventional ES process can be upscaled to promote a high-rate nanofiber production, the number of research works on the design of hybrid materials embedded in electrospun membranes for face mask application is still low and has mainly been carried out at the laboratory scale. In this work, a multi-needle ES was employed in a continuous processing for the manufacturing of both pristine Poly (Vinylidene Fluoride-co-Hexafluoropropylene) (PVDF-HFP) nanofibers and functionalized membrane ones embedded with TiO2 Nanoparticles (NPs) (PVDF-HFP@TiO2). The nanofibers were collected on Polyethylene Terephthalate (PET) nonwoven spunbond fabric and characterized by using Scanning Electron Microscopy and Energy Dispersive X-ray (SEM-EDX), Raman spectroscopy, and Atomic Force Microscopy (AFM) analysis. The photocatalytic study performed on the electrospun membranes proved that the PVDF-HFP@TiO2 nanofibers provide a significant antibacterial activity for both Staphylococcus aureus (~94%) and Pseudomonas aeruginosa (~85%), after only 5 min of exposure to a UV-A light source. In addition, the PVDF-HFP@TiO2 nanofibers exhibit high filtration efficiency against submicron particles (~99%) and a low pressure drop (~3 mbar), in accordance with the standard required for Filtering Face Piece masks (FFPs). Therefore, these results aim to provide a real perspective on producing electrospun polymer-based nanotextiles with self-sterilizing properties for the implementation of advanced face masks on a large scale.
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Affiliation(s)
- Adriano Cimini
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
- Industrial Research Laboratory, LABOR s.r.l., Via Giacomo Peroni 386, 00131 Rome, Italy
| | - Alessia Borgioni
- Department of Biology and Biotechnologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (A.B.); (E.P.)
| | - Elena Passarini
- Department of Biology and Biotechnologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (A.B.); (E.P.)
| | - Chiara Mancini
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
| | - Anacleto Proietti
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
| | - Luca Buccini
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
| | - Eleonora Stornelli
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
| | - Emily Schifano
- Department of Biology and Biotechnologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (A.B.); (E.P.)
| | - Simone Dinarelli
- Institute for the Structure of Matter (ISM), National Research Council (CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy;
| | - Francesco Mura
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Claudia Sergi
- Department of Chemical Engineering Materials Environment, Sapienza University of Rome & UdR INSTM, Via Eudossiana 18, 00184 Rome, Italy
| | - Irene Bavasso
- Department of Chemical Engineering Materials Environment, Sapienza University of Rome & UdR INSTM, Via Eudossiana 18, 00184 Rome, Italy
| | - Barbara Cortese
- National Research Council (CNR), Institute of Nanotechnology (CNR Nanotec), c/o Edificio Fermi, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;
| | - Daniele Passeri
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Enrico Imperi
- Industrial Research Laboratory, LABOR s.r.l., Via Giacomo Peroni 386, 00131 Rome, Italy
| | - Teresa Rinaldi
- Department of Biology and Biotechnologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; (A.B.); (E.P.)
| | - Alfredo Picano
- National Research Council of Italy, Institute for Microelectronics and Microsystems (CNR-IMM), Via Piero Gobetti 101, 40129 Bologna, Italy
| | - Marco Rossi
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Via A. Scarpa 16, 00161 Rome, Italy (A.P.); (L.B.); (E.S.); (D.P.)
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
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Chattopadhyay J, Pathak TS, Santos DMF. Applications of Polymer Electrolytes in Lithium-Ion Batteries: A Review. Polymers (Basel) 2023; 15:3907. [PMID: 37835955 PMCID: PMC10575090 DOI: 10.3390/polym15193907] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/15/2023] [Accepted: 09/25/2023] [Indexed: 10/15/2023] Open
Abstract
Polymer electrolytes, a type of electrolyte used in lithium-ion batteries, combine polymers and ionic salts. Their integration into lithium-ion batteries has resulted in significant advancements in battery technology, including improved safety, increased capacity, and longer cycle life. This review summarizes the mechanisms governing ion transport mechanism, fundamental characteristics, and preparation methods of different types of polymer electrolytes, including solid polymer electrolytes and gel polymer electrolytes. Furthermore, this work explores recent advancements in non-aqueous Li-based battery systems, where polymer electrolytes lead to inherent performance improvements. These battery systems encompass Li-ion polymer batteries, Li-ion solid-state batteries, Li-air batteries, Li-metal batteries, and Li-sulfur batteries. Notably, the advantages of polymer electrolytes extend beyond enhancing safety. This review also highlights the remaining challenges and provides future perspectives, aiming to propose strategies for developing novel polymer electrolytes for high-performance Li-based batteries.
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Affiliation(s)
- Jayeeta Chattopadhyay
- Amity Institute of Applied Sciences, Amity University Jharkhand, Ranchi 834002, India
| | - Tara Sankar Pathak
- Surendra Institute of Engineering and Management, Dhukuria, Siliguri 734009, West Bengal, India;
| | - Diogo M. F. Santos
- Center of Physics and Engineering of Advanced Materials, Laboratory for Physics of Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
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Samokhin Y, Varava Y, Diedkova K, Yanko I, Husak Y, Radwan-Pragłowska J, Pogorielova O, Janus Ł, Pogorielov M, Korniienko V. Fabrication and Characterization of Electrospun Chitosan/Polylactic Acid (CH/PLA) Nanofiber Scaffolds for Biomedical Application. J Funct Biomater 2023; 14:414. [PMID: 37623659 PMCID: PMC10455531 DOI: 10.3390/jfb14080414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 07/31/2023] [Accepted: 08/03/2023] [Indexed: 08/26/2023] Open
Abstract
The present study demonstrates a strategy for preparing porous composite fibrous materials with superior biocompatibility and antibacterial performance. The findings reveal that the incorporation of PEG into the spinning solutions significantly influences the fiber diameters, morphology, and porous area fraction. The addition of a hydrophilic homopolymer, PEG, into the Ch/PLA spinning solution enhances the hydrophilicity of the resulting materials. The hybrid fibrous materials, comprising Ch modified with PLA and PEG as a co-solvent, along with post-treatment to improve water stability, exhibit a slower rate of degradation (stable, moderate weight loss over 16 weeks) and reduced hydrophobicity (lower contact angle, reaching 21.95 ± 2.17°), rendering them promising for biomedical applications. The antibacterial activity of the membranes is evaluated against Staphylococcus aureus and Escherichia coli, with PEG-containing samples showing a twofold increase in bacterial reduction rate. In vitro cell culture studies demonstrated that PEG-containing materials promote uniform cell attachment, comparable to PEG-free nanofibers. The comprehensive evaluation of these novel materials, which exhibit improved physical, chemical, and biological properties, highlights their potential for biomedical applications in tissue engineering and regenerative medicine.
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Affiliation(s)
- Yevhen Samokhin
- Biomedical Research Centre, Sumy State University, R-Korsakova Street, 40007 Sumy, Ukraine; (Y.S.); (Y.V.); (K.D.); (I.Y.); (Y.H.); (O.P.)
| | - Yuliia Varava
- Biomedical Research Centre, Sumy State University, R-Korsakova Street, 40007 Sumy, Ukraine; (Y.S.); (Y.V.); (K.D.); (I.Y.); (Y.H.); (O.P.)
- Faculty of Chemistry, Silesian University of Technology, 44-100 Gliwice, Poland
| | - Kateryna Diedkova
- Biomedical Research Centre, Sumy State University, R-Korsakova Street, 40007 Sumy, Ukraine; (Y.S.); (Y.V.); (K.D.); (I.Y.); (Y.H.); (O.P.)
- Institute of Atomic Physics and Spectroscopy, University of Latvia, Jelgavas Iela 3, LV-1004 Riga, Latvia
| | - Ilya Yanko
- Biomedical Research Centre, Sumy State University, R-Korsakova Street, 40007 Sumy, Ukraine; (Y.S.); (Y.V.); (K.D.); (I.Y.); (Y.H.); (O.P.)
| | - Yevheniia Husak
- Biomedical Research Centre, Sumy State University, R-Korsakova Street, 40007 Sumy, Ukraine; (Y.S.); (Y.V.); (K.D.); (I.Y.); (Y.H.); (O.P.)
- Faculty of Chemistry, Silesian University of Technology, 44-100 Gliwice, Poland
| | - Julia Radwan-Pragłowska
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24 Street, 31-155 Cracow, Poland; (J.R.-P.); (Ł.J.)
| | - Oksana Pogorielova
- Biomedical Research Centre, Sumy State University, R-Korsakova Street, 40007 Sumy, Ukraine; (Y.S.); (Y.V.); (K.D.); (I.Y.); (Y.H.); (O.P.)
| | - Łukasz Janus
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24 Street, 31-155 Cracow, Poland; (J.R.-P.); (Ł.J.)
| | - Maksym Pogorielov
- Biomedical Research Centre, Sumy State University, R-Korsakova Street, 40007 Sumy, Ukraine; (Y.S.); (Y.V.); (K.D.); (I.Y.); (Y.H.); (O.P.)
- Institute of Atomic Physics and Spectroscopy, University of Latvia, Jelgavas Iela 3, LV-1004 Riga, Latvia
| | - Viktoriia Korniienko
- Biomedical Research Centre, Sumy State University, R-Korsakova Street, 40007 Sumy, Ukraine; (Y.S.); (Y.V.); (K.D.); (I.Y.); (Y.H.); (O.P.)
- Institute of Atomic Physics and Spectroscopy, University of Latvia, Jelgavas Iela 3, LV-1004 Riga, Latvia
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Piezo-Enhanced Photocatalytic Activity of the Electrospun Fibrous Magnetic PVDF/BiFeO 3 Membrane. Polymers (Basel) 2023; 15:polym15010246. [PMID: 36616597 PMCID: PMC9824544 DOI: 10.3390/polym15010246] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/04/2022] [Accepted: 12/08/2022] [Indexed: 01/06/2023] Open
Abstract
Creating stimulus-sensitive smart catalysts capable of decomposing organic dyes with high efficiency is a critical task in ecology. Combining the advantages of photoactive piezoelectric nanomaterials and ferroelectric polymers can effectively solve this problem by collecting mechanical vibrations and light energy. Using the electrospinning method, we synthesized hybrid polymer-inorganic nanocomposite fiber membranes based on polyvinylidene fluoride (PVDF) and bismuth ferrite (BFO). The samples were studied by scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), total transmittance and diffuse reflectance, X-ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), vibrating-sample magnetometer (VSM), and piezopotential measurements. It has been demonstrated that the addition of BFO leads to an increase in the proportion of the polar phase from 86.5% to 96.1% due to the surface ion-dipole interaction. It is shown that the composite exhibits anisotropy of magnetic properties depending on the orientation of the magnetic field. The results of piezo-photocatalytic experiments showed that under the combined action of ultrasonic treatment and irradiation with both visible and UV light, the reaction rate increased in comparison with photolysis, sonolysis, and piezocatalysis. Moreover, for PVDF/BFO, which does not exhibit photocatalytic activity, under the combined action of light and ultrasound, the reaction rate increases by about 3× under UV irradiation and by about 6× under visible light irradiation. This behavior is explained by the piezoelectric potential and the narrowing of the band gap of the composite due to mechanical stress caused by the ultrasound.
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Effect of heat treatments and aggressive media on mechanical properties of porous polytetrafluoroethylene membranes fabricated via electrospinning. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.110062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Varun S, George NM, Chandran AM, Varghese LA, Mural PKS. Multifaceted PVDF nanofibers in energy, water and sensors: A contemporary review (2018 to 2022) and future perspective. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.110064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Novel Design of Superhydrophobic and Anticorrosive PTFE and PAA + β - CD Composite Coating Deposited by Electrospinning, Spin Coating and Electrospraying Techniques. Polymers (Basel) 2022; 14:polym14204356. [PMID: 36297934 PMCID: PMC9612328 DOI: 10.3390/polym14204356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 09/26/2022] [Accepted: 10/13/2022] [Indexed: 11/27/2022] Open
Abstract
A superhydrophobic composite coating consisting of polytetrafluoroethylene (PTFE) and poly(acrylic acid)+ β-cyclodextrin (PAA + β-CD) was prepared on an aluminum alloy AA 6061T6 substrate by a three-step process of electrospinnig, spin coating, and electrospraying. The electrospinning technique is used for the fabrication of a polymeric binder layer synthesized from PAA + β-CD. The superhydrophilic characteristic of the electrospun PAA + β-CD layer makes it suitable for the absorption of an aqueous suspension with PTFE particles in a spin-coating process, obtaining a hydrophobic behavior. Then, the electrospraying of a modified PTFE dispersion forms a layer of distributed PTFE particles, in which a strong bonding of the particles with each other and with the PTFE particles fixed in the PAA + β-CD fiber matrix results in a remarkable improvement of the particles adhesion to the substrate by different heat treatments. The experimental results corroborate the important role of obtaining hierarchical micro/nano multilevel structures for the optimization of superhydrophobic surfaces, leading to water contact angles above 170°, very low contact angle of hysteresis (CAH = 2°) and roll-off angle (αroll−off < 5°). In addition, a superior corrosion resistance is obtained, generating a barrier to retain the electrolyte infiltration. This study may provide useful insights for a wide range of applications.
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Li Y, Hu Q, Zhang R, Ma W, Pan S, Zhao Y, Wang Q, Fang P. Piezoelectric Nanogenerator Based on Electrospinning PVDF/Cellulose Acetate Composite Membranes for Energy Harvesting. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7026. [PMID: 36234366 PMCID: PMC9573165 DOI: 10.3390/ma15197026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/27/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
The organic piezoelectric polymer polyvinylidene fluoride (PVDF) has attracted extensive research because of its excellent flexibility and mechanical energy-harvesting properties. Here, the electrospinning technique was taken to fabricate synthesized fiber membranes of a PVDF/cellulose acetate (CA) composite. The obtained PVDF/CA electrospun fiber membranes (EFMs) were employed to prepare a flexible nanogenerator. XRD and FTIR spectroscopy revealed the enhancement of piezoelectric behavior due to an increase in β-phase in PVDF/CA EFMs compared with cast films. The PVDF/CA fibers (mass ratio of PVDF to CA = 9:1) showed an output voltage of 7.5 V and a short-circuit current of 2.1 μA under mechanical stress of 2 N and frequency of 1 Hz, which were 2.5 and two times greater than those of the pure PVDF fibers, respectively. By charging a 4.7 µF capacitor for 15 min with the voltage generated by the PVDF/CA EFMs, nine LED lamps could be lit. The work provides an effective approach to enhancing the piezoelectric effects of PVDF for low-power electronic loading of macromolecule polymers.
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Affiliation(s)
- Yuanyuan Li
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Qing Hu
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Rui Zhang
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Wenmei Ma
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Siwei Pan
- Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
| | - Yaohong Zhao
- Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
| | - Qing Wang
- Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
| | - Pengfei Fang
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
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Ameduri B. Copolymers of Vinylidene fluoride with Functional comonomers and Applications therefrom: Recent Developments, Challenges and Future Trends. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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