1
|
Yoo JU, Kim DH, Choi TM, Jung ES, Lee HR, Lee CY, Pyo SG. Advancements in Flexible Nanogenerators: Polyvinylidene Fluoride-Based Nanofiber Utilizing Electrospinning. Molecules 2024; 29:3576. [PMID: 39124980 PMCID: PMC11313764 DOI: 10.3390/molecules29153576] [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: 07/04/2024] [Revised: 07/25/2024] [Accepted: 07/26/2024] [Indexed: 08/12/2024] Open
Abstract
With the gradual miniaturization of electronic devices and the increasing interest in wearable devices, flexible microelectronics is being actively studied. Owing to the limitations of existing battery systems corresponding to miniaturization, there is a need for flexible alternative power sources. Accordingly, energy harvesting from surrounding environmental systems using fluorinated polymers with piezoelectric properties has received significant attention. Among them, polyvinylidene fluoride (PVDF) and PVDF co-polymers have been researched as representative organo-piezoelectric materials because of their excellent piezoelectric properties, mechanical flexibility, thermal stability, and light weight. Electrospinning is an effective method for fabricating nanofibrous meshes with superior surface-to-volume ratios from polymer solutions. During electrospinning, the polymer solution is subjected to mechanical stretching and in situ poling, corresponding to an external strong electric field. Consequently, the fraction of the piezoelectric β-phase in PVDF can be improved by the electrospinning process, and enhanced harvesting output can be realized. An overview of electrospun piezoelectric fibrous meshes composed of PVDF or PVDF co-polymers to be utilized is presented, and the recent progress in enhancement methods for harvesting output, such as fiber alignment, doping with various nanofillers, and coaxial fibers, is discussed. Additionally, other applications of these meshes as sensors are reviewed.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Sung-Gyu Pyo
- School of Integrative Engineering, Chung-Ang University, 84, Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea; (J.-U.Y.); (D.-H.K.); (T.-M.C.); (E.-S.J.); (H.-R.L.); (C.-Y.L.)
| |
Collapse
|
2
|
Wildy M, Wei W, Xu K, Schossig J, Hu X, Hyun DC, Chen W, Zhang C, Lu P. Heat's Role in Solution Electrospinning: A Novel Approach to Nanofiber Structure Optimization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:7982-7991. [PMID: 38569012 PMCID: PMC11025124 DOI: 10.1021/acs.langmuir.3c03919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 03/18/2024] [Accepted: 03/27/2024] [Indexed: 04/05/2024]
Abstract
In this study, we explored an innovative application of heat-assisted solution electrospinning, a technique that significantly advances the control of phase separation in polystyrene (PS) fibers. Our experimental approach involved the use of direct heating and a convection air sheath applied through a coaxial needle, focusing on solvents with varying vapor pressures. This method enabled a detailed investigation into how solvent evaporation rates affect the morphology of the electrospun fibers. SEM and AFM measurements revealed that the application of direct heating and a heated air sheath offered precise control over the fiber morphology, significantly influencing both the surface and internal structure of the fibers. Additionally, we observed notable changes in fiber diameter, indicating that heat-assisted electrospinning can be effectively utilized to tailor fiber dimensions according to specific application requirements. Moreover, our research demonstrated the critical role of solvent properties, particularly vapor pressure, in determining the final characteristics of the electrospun fibers. By comparing fibers produced with different solvents, we gained insights into the complex interplay between solvent dynamics and heat application in fiber formation. The implications of these findings are far-reaching, offering new possibilities for the fabrication of nanofibers with customized properties. Furthermore, this could have profound impacts on various applications, from biomedical to environmental, where specific fiber characteristics are crucial. This study not only contributes to the understanding of phase separation in electrospinning but also opens avenues for further research on the optimization of fiber properties for diverse industrial and scientific applications.
Collapse
Affiliation(s)
- Michael Wildy
- Department
of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| | - Wanying Wei
- Department
of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| | - Kai Xu
- Department
of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| | - John Schossig
- Department
of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| | - Xiao Hu
- Department
of Physics and Astronomy, Rowan University, Glassboro, New Jersey 08028, United States
| | - Dong Choon Hyun
- Department
of Polymer Science and Engineering, Kyungpook
National University, Daegu 41566, South Korea
| | - Wenshuai Chen
- Key
Laboratory of Bio-based Material Science and Technology, Ministry
of Education, Northeast Forestry University, Harbin 150040, China
| | - Cheng Zhang
- Chemistry
Department, Long Island University (Post), Brookville, New York 11548, United States
| | - Ping Lu
- Department
of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| |
Collapse
|
3
|
Shao Z, Zhang X, Song Z, Liu J, Liu X, Zhang C. Simulation Guided Coaxial Electrospinning of Polyvinylidene Fluoride Hollow Fibers with Tailored Piezoelectric Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303285. [PMID: 37196418 DOI: 10.1002/smll.202303285] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/01/2023] [Indexed: 05/19/2023]
Abstract
Electrospun polyvinylidene fluoride (PVDF) piezoelectric fibers have high potential applicability in mechanical energy harvesting and self-powered sensing owing to their high electromechanical coupling capabilities. Strategies for tailoring fiber morphology have been the primary focus for realizing enhanced piezoelectric output. However, the relationship between piezoelectric performance and fiber structure remains unclear. This study fabricates PVDF hollow fibers through coaxial electrospinning, whose wall thickness can be tuned by changing the internal solution concentration. Simulation analysis demonstrates an increased effective deformation of the hollow fiber as enlarging inner diameter, resulting in enhanced piezoelectric output, which is in excellent agreement with the experimental results. This study is the first to unravel the influence mechanism of morphology regulation of a PVDF hollow fiber on its piezoelectric performance from both simulation and experimental aspects. The optimal PVDF hollow fiber piezoelectric energy harvester (PEH) delivers a piezoelectric output voltage of 32.6 V, ≈3 times that of the solid PVDF fiber PEH. Furthermore, the electrical output of hollow fiber PEH can be stably stored in secondary energy storage systems to power microelectronics. This study highlights an efficient approach for reconciling the simulation and tailoring the fiber PEH morphology for enhanced performances for future self-powered systems.
Collapse
Affiliation(s)
- Zhuzhu Shao
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Xuan Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Zihan Song
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Jingfeng Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Xingang Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Chuhong Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| |
Collapse
|
4
|
Rosalia M, Grisoli P, Dorati R, Chiesa E, Pisani S, Bruni G, Genta I, Conti B. Influence of Electrospun Fibre Secondary Morphology on Antibiotic Release Kinetic and Its Impact on Antimicrobic Efficacy. Int J Mol Sci 2023; 24:12108. [PMID: 37569489 PMCID: PMC10418872 DOI: 10.3390/ijms241512108] [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: 07/07/2023] [Revised: 07/19/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
Vascular graft infections are a severe complication in vascular surgery, with a high morbidity and mortality. Prevention and treatment involve the use of antibiotic- or antiseptic-impregnated artificial vascular grafts, but currently, there are no commercially available infection-proof small-diameter vascular grafts (SDVGs). In this work we investigated the antimicrobic activity of two SDVGs prototypes loaded with tobramycin and produced via the electrospinning of drug-doped PLGA (polylactide-co-glycolide) solutions. Differences in rheological and conductivity properties of the polymer solutions resulted in non-identical fibre morphology that deeply influenced the hydration profile and consequently the in vitro cumulative drug release, which was investigated by using a spectrofluorimetric technique. Using DDSolver Excel add-in, modelling of the drug release kinetic was performed to evaluate the release mechanism involved: Prototype 1 showed a sustained and diffusive driven drug release, which allowed for the complete elution of tobramycin within 2 weeks, whereas Prototype 2 resulted in a more extended drug release controlled by both diffusion and matrix relaxation. Time-kill assays performed on S. aureus and E. coli highlighted the influence of burst drug release on the decay rate of bacterial populations, with Prototype 1 being more efficient on both microorganisms. Nevertheless, both prototypes showed good antimicrobic activity over the 5 days of in vitro testing.
Collapse
Affiliation(s)
- Mariella Rosalia
- Department of Drug Sciences, Pharmaceutical Section, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (M.R.); (R.D.); (E.C.); (S.P.); (I.G.)
| | - Pietro Grisoli
- Department of Drug Sciences, Pharmacological Section, University of Pavia, Via Taramelli 16, 27100 Pavia, Italy
| | - Rossella Dorati
- Department of Drug Sciences, Pharmaceutical Section, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (M.R.); (R.D.); (E.C.); (S.P.); (I.G.)
| | - Enrica Chiesa
- Department of Drug Sciences, Pharmaceutical Section, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (M.R.); (R.D.); (E.C.); (S.P.); (I.G.)
| | - Silvia Pisani
- Department of Drug Sciences, Pharmaceutical Section, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (M.R.); (R.D.); (E.C.); (S.P.); (I.G.)
| | - Giovanna Bruni
- Consorzio per lo Sviluppo dei Sistemi a Grande Interfase (C.S.G.I.), Department of Chemistry, Physical Chemistry Section, University of Pavia, Via Taramelli 10, 27100 Pavia, Italy;
| | - Ida Genta
- Department of Drug Sciences, Pharmaceutical Section, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (M.R.); (R.D.); (E.C.); (S.P.); (I.G.)
| | - Bice Conti
- Department of Drug Sciences, Pharmaceutical Section, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (M.R.); (R.D.); (E.C.); (S.P.); (I.G.)
| |
Collapse
|
5
|
Pan CT, Dutt K, Kumar A, Kumar R, Chuang CH, Lo YT, Wen ZH, Wang CS, Kuo SW. PVDF/AgNP/MXene composites-based near-field electrospun fiber with enhanced piezoelectric performance for self-powered wearable sensors. Int J Bioprint 2022; 9:647. [PMID: 36844238 PMCID: PMC9947487 DOI: 10.18063/ijb.v9i1.647] [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: 06/24/2022] [Accepted: 09/11/2022] [Indexed: 12/03/2022] Open
Abstract
336MXenes, as highly electronegative and conductive two-dimensional nanomaterials, are extensively studied for their use in sensors and flexible electronics. In this study, near-field electrospinning was used to prepare a new poly(vinylidene difluoride) (PVDF)/Ag nanoparticle (AgNP)/MXene composite nanofiber film as a self-powered flexible human motion-sensing device. The composite film displayed highly piezoelectric properties with the presence of MXene. Scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy revealed that the intercalated MXene in the composite nanofibers was evenly spread out, which not only prevented the aggregation of MXene but also enabled the composite materials to form self-reduced AgNPs. The prepared PVDF/AgNP/MXene fibers displayed exceptional stability and excellent output performance, enabling their use for energy harvesting and powering light-emitting diodes. The doping of MXene/AgNPs increased the electrical conductivity of the PVDF material, improved its piezoelectric properties, and enhanced the piezoelectric constant of PVDF piezoelectric fibers, thereby allowing the production of flexible, sustainable, wearable, and self-powered electrical devices.
Collapse
Affiliation(s)
- Cheng-Tang Pan
- Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung 80424, Taiwan,Institute of Advanced Semiconductor Packaging and Testing, College of Semiconductor and Advanced Technology Research, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Karishma Dutt
- Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Amit Kumar
- Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Rahul Kumar
- Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Cheng-Hsin Chuang
- Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Yi-Ting Lo
- Department of Psychiatry, Kaohsiung Armed Forces General Hospital, Kaohsiung, 80284, Taiwan, ROC
| | - Zhi-Hong Wen
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Chien-Shu Wang
- Department of Psychiatry, Kaohsiung Armed Forces General Hospital, Kaohsiung, 80284, Taiwan, ROC,Corresponding author: Shiao-Wei Kuo ()
| | - Shiao-Wei Kuo
- Institute of Advanced Semiconductor Packaging and Testing, College of Semiconductor and Advanced Technology Research, National Sun Yat-sen University, Kaohsiung 80424, Taiwan,Department of Materials and Optoelectronic Science, Center for Functional Polymers and Supramolecular Materials, National Sun Yat-sen University, Kaohsiung 80424, Taiwan,Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan,Corresponding author: Shiao-Wei Kuo ()
| |
Collapse
|
6
|
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]
|
7
|
Highly oriented PVDF molecular chains for enhanced material performance. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
8
|
Johnson PM, Meinhold KL, Ohl NR, Lehtinen JM, Robinson JL. Surfactant Molecular Properties Control Location in Emulsion Electrospun Fibers and Dictate Resulting Fiber Properties. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
9
|
Kianfar P, Bongiovanni R, Ameduri B, Vitale A. Electrospinning of Fluorinated Polymers: Current State of the Art on Processes and Applications. POLYM REV 2022. [DOI: 10.1080/15583724.2022.2067868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Parnian Kianfar
- Department of Applied Science and Technology, Politecnico di Torino, Torino, Italy
| | - Roberta Bongiovanni
- Department of Applied Science and Technology, Politecnico di Torino, Torino, Italy
| | - Bruno Ameduri
- ICGM, Université de Montpellier, CNRS, ENSCM, Montpellier, France
| | - Alessandra Vitale
- Department of Applied Science and Technology, Politecnico di Torino, Torino, Italy
| |
Collapse
|
10
|
Kh. Kara G, Tadjarodi A, Kehtari M. Designing a novel 3D nanofibrous scaffold based on nanoalloy AuAg NPs (AuAg@ PAN NFs) for osteogenic differentiation of human adipose derived mesenchymal stem cells (hADMSCs). Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
11
|
Poly(vinylidene fluoride)/poly(styrene-co-acrylic acid) nanofibers as potential materials for blood separation. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.119881] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
12
|
Johnson PM, Lehtinen JM, Robinson JL. Surfactant Interactions and Solvent Phase Solubility Modulate Small Molecule Release from Emulsion Electrospun Fibers. AIChE J 2021; 67:e17470. [PMID: 36582410 PMCID: PMC9797104 DOI: 10.1002/aic.17470] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Emulsion electrospinning provides a tunable system for the development of porous scaffolds for controlled, localized drug delivery in tissue engineering applications. This study aimed to elucidate the role of model drug interactions with emulsion chemistry on loading and release rates from fibers with controlled fiber diameter and fiber volume fraction. Nile Red and Rhodamine B were used as model drugs and encapsulation efficiency and release rates were determined from poly(caprolactone) (PCL) electrospun fibers spun either with no surfactant (Span 80), surfactant, or water-in-oil emulsions. Drug loading efficiency and release rates were modulated by both surfactant and aqueous internal phase in the emulsions as a function of drug molecule hydrophobicity. Overall, these results demonstrate the role of intermolecular interactions and drug phase solubility on the release from emulsion electrospun fibers and highlight the need to independently control these parameters when designing fibers for use as tunable drug delivery systems.
Collapse
Affiliation(s)
| | - Justin M Lehtinen
- Department of Chemical and Petroleum Engineering, University of Kansas
| | - Jennifer L Robinson
- Bioengineering Graduate Program, University of Kansas
- Department of Chemical and Petroleum Engineering, University of Kansas
| |
Collapse
|
13
|
Sengupta A, Das S, Dasgupta S, Sengupta P, Datta P. Flexible Nanogenerator from Electrospun PVDF-Polycarbazole Nanofiber Membranes for Human Motion Energy-Harvesting Device Applications. ACS Biomater Sci Eng 2021; 7:1673-1685. [PMID: 33683096 DOI: 10.1021/acsbiomaterials.0c01730] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Poly(vinylidene difluoride) (PVDF) has become the polymer matrix of choice for fabrication of wearable electronics and physiological monitoring devices. Despite possessing a high piezoelectric constant, additives are required to increase the charge transfer from PVDF matrix to connected signal readout units. Many of these additives also stabilize the β-phase of PVDF, which is associated with highest piezoelectric coefficients. However, most of the additives used are often brittle ceramic-phase materials resulting in decreased flexibility of the devices and offsetting the gain in β-phase content. Intrinsically conducting polymers (ICP), on the other hand, are ideal candidates to improve the device-related properties of PVDF, due to their higher flexibility than ceramic fillers as well as ability to form conducting network in PVDF membranes. This work reports the performance and device feasibility of PVDF-polycarbazole (PCZ) electrospun nanofiber membranes. A higher β-phase was observed by FTIR spectroscopy in PVDF/PCZ compared to other PVDF phases. Moreover, a higher open-circuit potential was recorded over PVDF/polyaniline composites, which were studied for comparison. The addition of PCZ reduced the flexibility of pure PVDF nanofibers by 20% only. Besides, the work investigated the bacterial biofouling and cell compatibility of the matrix, as essential properties to examine any putative medical device application. PVDF/PCZ membranes were then used to develop a nanogenerator, which was capable of instantly lighting an entire LED array employing the rectified output power, and charged up a 2.2 μF capacitors using a bridge rectifier through a vertical compressive force applied periodically. Finally, the nanogenerator demonstrated electrical energy harvesting from movements of various parts of the human body, such as toe and heel movement and wrist bending. In conclusion, PCZ can be considered as an attractive, biocompatible, and anti-biofouling conducting polymer for electrical actuation and flexible electronic device applications.
Collapse
Affiliation(s)
- Aditya Sengupta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, P.O. Botanic Garden, Howrah 711103, WB, India
| | - Soumen Das
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, P.O. Botanic Garden, Howrah 711103, WB, India
| | - Shalini Dasgupta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, P.O. Botanic Garden, Howrah 711103, WB, India
| | - Pavel Sengupta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, P.O. Botanic Garden, Howrah 711103, WB, India
| | - Pallab Datta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, P.O. Botanic Garden, Howrah 711103, WB, India
| |
Collapse
|
14
|
Xiao Y, Wang Y, Zhu W, Yao J, Sun C, Militky J, Venkataraman M, Zhu G. Development of tree-like nanofibrous air filter with durable antibacterial property. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118135] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
15
|
Johnson PM, Knewtson KE, Hodge JG, Lehtinen JM, Trofimoff AS, Fritz DJ, Robinson JL. Surfactant location and internal phase volume fraction dictate emulsion electrospun fiber morphology and modulate drug release and cell response. Biomater Sci 2021; 9:1397-1408. [PMID: 33393536 PMCID: PMC7904618 DOI: 10.1039/d0bm01751e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Emulsion electrospinning is a versatile technique used to create fibrous meshes for applications in drug delivery and tissue engineering. In this study, the effects of surfactant and increasing internal phase volume fraction on emulsion electrospun fiber morphology were investigated. The fiber diameter, surface topography, internal architecture, mesh hydrophobicity, and fiber volume fraction were all characterized and the resulting effects on model drug release and cell response were determined. Surfactant relocation to the fiber surface resulted in alterations to fiber surface topography and internal morphology, increased rate of water adsorption into the mesh, and reduced burst effects of drug release. Increasing the internal phase volume fraction within the emulsion resulted in minimal change to fiber diameter, surface morphology, fiber volume fraction, and rate of water adsorption illustrating the ability to increase drug loading without affecting fiber properties. Lastly, all meshes promoted cell adhesion and good viability with a trend of increased MTT absorbance from cells on the surfactant and emulsion fibers possibly suggesting that an increase in surface area via smaller fiber diameter and fiber volume fraction increases metabolic activity. Overall, these studies indicate that fiber morphology and mesh hydrophobicity can be tuned by controlling surfactant location within fibers and internal phase volume fraction. Modulating fiber properties within the emulsion electrospun mesh is important to achieve controlled drug release and cell response for tissue engineering applications.
Collapse
Affiliation(s)
| | - Kelsey E Knewtson
- Department of Chemical and Petroleum Engineering, University of Kansas, USA
| | - Jacob G Hodge
- Bioengineering Graduate Program, University of Kansas, USA.
| | - Justin M Lehtinen
- Department of Chemical and Petroleum Engineering, University of Kansas, USA
| | - Anna S Trofimoff
- Department of Chemical and Petroleum Engineering, University of Kansas, USA
| | - D Joseph Fritz
- Department of Chemical and Petroleum Engineering, University of Kansas, USA
| | - Jennifer L Robinson
- Bioengineering Graduate Program, University of Kansas, USA. and Department of Chemical and Petroleum Engineering, University of Kansas, USA
| |
Collapse
|
16
|
He Z, Rault F, Lewandowski M, Mohsenzadeh E, Salaün F. Electrospun PVDF Nanofibers for Piezoelectric Applications: A Review of the Influence of Electrospinning Parameters on the β Phase and Crystallinity Enhancement. Polymers (Basel) 2021; 13:E174. [PMID: 33418962 PMCID: PMC7825031 DOI: 10.3390/polym13020174] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 12/15/2022] Open
Abstract
Polyvinylidene fluoride (PVDF) is among the most attractive piezo-polymers due to its excellent piezoelectricity, lightweight, flexibility, high thermal stability, and chemical resistance. PVDF can exist under different forms of films, membranes, and (nano)fibers, and its piezoelectric property related to its β phase content makes it interesting for energy harvesters and wearable applications. Research investigation shows that PVDF in the form of nanofibers prepared by electrospinning has more flexibility and better air permeability, which make them more suitable for these types of applications. Electrospinning is an efficient technique that produces PVDF nanofibers with a high β phase fraction and crystallinity by aligning molecular dipoles (-CH2 and -CF2) along an applied voltage direction. Different nanofibers production techniques and more precisely the electrospinning method for producing PVDF nanofibers with optimal electrospinning parameters are the key focuses of this paper. This review article highlights recent studies to summarize the influence of electrospinning parameters such as process (voltage, distance, flow rate, and collector), solution (Mw, concentration, and solvent), and ambient (humidity and temperature) parameters to enhance the piezoelectric properties of PVDF nanofibers. In addition, recent development regarding the effect of adding nanoparticles in the structure of nanofibers on the improvement of the β phase is reviewed. Finally, different methods of measuring piezoelectric properties of PVDF nanofibrous membrane are discussed.
Collapse
Affiliation(s)
- Zhongchen He
- ENSAIT, GEMTEX—Laboratoire de Génie et Matériaux Textiles, F-59000 Lille, France; (Z.H.); (F.R.); (M.L.); (E.M.)
| | - François Rault
- ENSAIT, GEMTEX—Laboratoire de Génie et Matériaux Textiles, F-59000 Lille, France; (Z.H.); (F.R.); (M.L.); (E.M.)
| | - Maryline Lewandowski
- ENSAIT, GEMTEX—Laboratoire de Génie et Matériaux Textiles, F-59000 Lille, France; (Z.H.); (F.R.); (M.L.); (E.M.)
| | - Elham Mohsenzadeh
- ENSAIT, GEMTEX—Laboratoire de Génie et Matériaux Textiles, F-59000 Lille, France; (Z.H.); (F.R.); (M.L.); (E.M.)
- Junia, F-59000 Lille, France
- Univ. Lille, F-59000 Lille, France
| | - Fabien Salaün
- ENSAIT, GEMTEX—Laboratoire de Génie et Matériaux Textiles, F-59000 Lille, France; (Z.H.); (F.R.); (M.L.); (E.M.)
| |
Collapse
|
17
|
Szewczyk PK, Stachewicz U. The impact of relative humidity on electrospun polymer fibers: From structural changes to fiber morphology. Adv Colloid Interface Sci 2020; 286:102315. [PMID: 33197707 DOI: 10.1016/j.cis.2020.102315] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 11/03/2020] [Accepted: 11/03/2020] [Indexed: 02/05/2023]
Abstract
Electrospinning is one of the most important methods used for the production of nanostructured materials. Electrospun nanofibers are used in a wide spectrum of applications such as drug delivery systems, filtration, fog harvesting, tissue engineering, smart textiles, flexible electronics, and more. Control of the manufacturing process is essential for further technology developments. In electrospinning, relative humidity is a crucial parameter that influences nearly all the properties of the collected fibers, such as morphology, mechanical properties, liquid retention, wetting properties, phase composition, chain conformation, and surface potential. Relative humidity is a determining component of a reliable process as it governs charge dissipation and solvent evaporation. This review summarizes the electrospinning process and its applications, phase separation processes, and impact of relative humidity on the properties of polymer fibers. We investigated relative humidity effects on both hydrophilic and hydrophobic polymers using over 20 polymers and hundreds of solvent systems. Most importantly, we underlined the indisputable importance of relative humidity in process repeatability and demonstrated its impact on almost all aspects of fiber production from a solution droplet to an electrospun network.
Collapse
|
18
|
Humidity Controlled Mechanical Properties of Electrospun Polyvinylidene Fluoride (PVDF) Fibers. FIBERS 2020. [DOI: 10.3390/fib8100065] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Processing parameters in electrospinning allow us to control the properties of fibers on a molecular level and are able to tailor them for specific applications. In this study, we investigate how relative humidity (RH) affects the mechanical properties of electrospun polyvinylidene fluoride (PVDF). The mechanical properties of single fibers were carried out using a specialized tensile stage. The results from tensile tests were additionally correlated with high-resolution imaging showing the behavior of individual fibers under tensile stress. The mechanical characteristic is strongly dependent on the crystallinity, chain orientation, and fiber diameter of electrospun PVDF fibers. Our results show the importance of controlling RH during electrospinning as the mechanical properties are significantly affected. At low RH = 30% PVDF fibers are 400% stiffer than their counterparts prepared at high RH = 60%. Moreover, the vast differences in the strain at failure were observed, namely 310% compared to 75% for 60% and 30% RH, respectively. Our results prove that humidity is a crucial parameter in electrospinning able to control the mechanical properties of polymer fibers.
Collapse
|
19
|
Zhang W, He Z, Han Y, Jiang Q, Zhan C, Zhang K, Li Z, Zhang R. Structural design and environmental applications of electrospun nanofibers. COMPOSITES. PART A, APPLIED SCIENCE AND MANUFACTURING 2020; 137:106009. [PMID: 32834735 PMCID: PMC7291996 DOI: 10.1016/j.compositesa.2020.106009] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/27/2020] [Accepted: 06/08/2020] [Indexed: 05/06/2023]
Abstract
Nanofibers have attracted extensive attention and been applied in various fields due to their high aspect ratio, high specific surface area, flexibility, structural abundance, etc. The electrospinning method is one of the most promising and effective ways to produce nanofibers. The electrospun nanofibers-based films and membranes have already been demonstrated to possess small pore sizes, larges specific surface area, and can be grafted with different functionalities to adapt to various purposes. The environmental applications of nanofibers are one of the essential application fields, and great achievements have been made in this field. To well summarize the development of nanofibers and their environmental applications, we review the nanofiber fabrication methods, advanced fiber structures, and their applications in the field of air filtration, heavy metal removal, and self-cleaning surface. We hope this review and summary can provide readers a comprehensive understanding of the structural design and environmental applications of electrospun nanofibers.
Collapse
|
20
|
Zaarour B, Zhu L, Jin X. Direct fabrication of electrospun branched nanofibers with tiny diameters for oil absorption. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1798779] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Bilal Zaarour
- Textile Industries Mechanical Engineering and Techniques Department, Faculty of Mechanical and Electrical Engineering, Damascus University, Damascus, Syria
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Songjiang, Shanghai, China
| | - Lei Zhu
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Songjiang, Shanghai, China
| | - Xiangyu Jin
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Songjiang, Shanghai, China
| |
Collapse
|
21
|
Zaarour B, Zhu L, Jin X. Direct generation of electrospun branched nanofibers for energy harvesting. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.4992] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Bilal Zaarour
- Engineering Research Center of Technical Textiles, Ministry of Education College of Textiles, Donghua University, Songjiang Shanghai China
- Textile Industries Mechanical Engineering and Techniques Department, Faculty of Mechanical and Electrical Engineering Damascus University Damascus Syria
| | - Lei Zhu
- Engineering Research Center of Technical Textiles, Ministry of Education College of Textiles, Donghua University, Songjiang Shanghai China
| | - Xiangyu Jin
- Engineering Research Center of Technical Textiles, Ministry of Education College of Textiles, Donghua University, Songjiang Shanghai China
| |
Collapse
|
22
|
Zaarour B, Zhu L, Huang C, Jin X. A mini review on the generation of crimped ultrathin fibers via electrospinning: Materials, strategies, and applications. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.4876] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Bilal Zaarour
- Engineering Research Center of Technical Textiles, Ministry of Education, College of TextilesDonghua University Shanghai China
- Textile Industries Mechanical Engineering and Techniques Department, Faculty of Mechanical and Electrical EngineeringDamascus University Damascus Syria
| | - Lei Zhu
- Engineering Research Center of Technical Textiles, Ministry of Education, College of TextilesDonghua University Shanghai China
| | - Chen Huang
- Engineering Research Center of Technical Textiles, Ministry of Education, College of TextilesDonghua University Shanghai China
| | - Xiangyu Jin
- Engineering Research Center of Technical Textiles, Ministry of Education, College of TextilesDonghua University Shanghai China
| |
Collapse
|
23
|
Zaarour B, Zhu L, Jin X. A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications. ChemistrySelect 2020. [DOI: 10.1002/slct.201903981] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Bilal Zaarour
- Engineering Research Center of Technical Textiles, Ministry of Education, College of TextilesDonghua University, No. 2999 North Renmin Road Songjiang, Shanghai 201620 China
- Textile Industries Mechanical Engineering and Techniques DepartmentFaculty of Mechanical and Electrical Engineering, Damascus University Damascus Syria
| | - Lei Zhu
- Engineering Research Center of Technical Textiles, Ministry of Education, College of TextilesDonghua University, No. 2999 North Renmin Road Songjiang, Shanghai 201620 China
| | - Xiangyu Jin
- Engineering Research Center of Technical Textiles, Ministry of Education, College of TextilesDonghua University, No. 2999 North Renmin Road Songjiang, Shanghai 201620 China
| |
Collapse
|
24
|
Development of Molecularly Imprinted Membranes for Selective Determination of Urinary Ultra-Trace 5-Fluorouracil as Antineoplastic Drug Used in Chemotherapy. Macromol Res 2020. [DOI: 10.1007/s13233-020-8051-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|