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Increasing in the heat resistance efficiency of filters using hydrophobic PVA/PEO/PTFE/SA nanofiber and PTFE nanoparticle composite. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.12.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Krysiak ZJ, Stachewicz U. Urea-Based Patches with Controlled Release for Potential Atopic Dermatitis Treatment. Pharmaceutics 2022; 14:1494. [PMID: 35890388 PMCID: PMC9320356 DOI: 10.3390/pharmaceutics14071494] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/06/2022] [Accepted: 07/18/2022] [Indexed: 01/25/2023] Open
Abstract
Skin diseases such as atopic dermatitis (AD) are widespread and affect people all over the world. Current treatments for dry and itchy skin are mostly focused on pharmaceutical solutions, while supportive therapies such as ointments bring immediate relief. Electrospun membranes are commonly used as a drug delivery system, as they have a high surface to volume area, resulting in high loading capacity. Within this study we present the manufacturing strategies of skin patches using polymer membranes with active substances for treating various skin problems. Here, we manufactured the skin patches using electrospun poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) (PVB) fibers blended and electrosprayed with urea. The highest cumulative release of urea was obtained from the PVB patches manufactured via blend electrospinning with 5% of the urea incorporated in the fiber. The maximum concentration of released urea was acquired after 30 min, which was followed up by 6 h of constant release level. The simultaneous electrospinning and electrospraying limited the urea deposition and resulted in the lowest urea incorporation followed by the low release level. The urea-based patches, manufactured via blend electrospinning, exhibited a great potential as overnight treatment for various skin problems and their development can bring new trends to the textile-based therapies for AD.
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Affiliation(s)
| | - Urszula Stachewicz
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, 30-059 Krakow, Poland;
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Shehata N, Samir E, Gaballah S, Hamed A, Saad M, Salah M. Fluorescent Nanocomposite of Embedded Ceria Nanoparticles in Electrospun Chitosan Nanofibers. J Fluoresc 2016; 27:767-772. [PMID: 28032280 DOI: 10.1007/s10895-016-2010-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 12/20/2016] [Indexed: 11/26/2022]
Abstract
This paper introduces a detailed optical characterization for a novel fluorescent biodegradable nanocomposite of electro-spun chitosan nanofibers with in-situ embedded cerium oxide (ceria) nanoparticles as the nanocomposite optical fluorescent material. Under near ultra-violet excitation, this synthesized nanocomposite emits a visible green wavelength at nearly 520nmwith different intensities according to the concentration of the embedded fluorescent material; i.e. ceria nanoparticles. This emission is due to the synthesized ceria nanoparticles optical tri-valiant cerium ions ce3+, associated with formed oxygen vacancies with a direct allowed bandgap around 3.5 eV. Optical characteristics such as fluorescence emission intensity, absorbance dispersion, and direct bandgap are presented besides structural characteristics such as FTIR spectroscopy, and SEM analysis. The synthesized optical nanocomposite could be helpful in many further applications such as bio-imaging, biomedical engineering, and environmental optical sensors.
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Affiliation(s)
- Nader Shehata
- Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt.
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt.
- USTAR - The Utah Science Technology and Research Agency (USTAR) Bioinnovations Center, Utah State University, Logan, UT, 84341, USA.
| | - Effat Samir
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt
- Department of Electrical Engineering, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt
| | - Soha Gaballah
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt
- Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt
| | - Aya Hamed
- Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt
| | - Marwa Saad
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt
- Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt
| | - Mohammed Salah
- Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt
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Embedded Ceria Nanoparticles in Crosslinked PVA Electrospun Nanofibers as Optical Sensors for Radicals. SENSORS 2016; 16:s16091371. [PMID: 27571083 PMCID: PMC5038649 DOI: 10.3390/s16091371] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 04/08/2016] [Accepted: 04/11/2016] [Indexed: 11/16/2022]
Abstract
This work presents a new nanocomposite of cerium oxide (ceria) nanoparticles embedded in electrospun PVA nanofibers for optical sensing of radicals in solutions. Our ceria nanoparticles are synthesized to have O-vacancies which are the receptors for the radicals extracted from peroxide in water solution. Ceria nanoparticles are embedded insitu in PVA solution and then formed as nanofibers using an electrospinning technique. The formed nanocomposite emits visible fluorescent emissions under 430 nm excitation, due to the active ceria nanoparticles with fluorescent Ce(3+) ionization states. When the formed nanocomposite is in contact with peroxide solution, the fluorescence emission intensity peak has been found to be reduced with increasing concentration of peroxide or the corresponding radicals through a fluorescence quenching mechanism. The fluorescence intensity peak is found to be reduced to more than 30% of its original value at a peroxide weight concentration up to 27%. This work could be helpful in further applications of radicals sensing using a solid mat through biomedical and environmental monitoring applications.
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Shehata N, Gaballah S, Samir E, Hamed A, Saad M. Fluorescent Nanocomposite of Embedded Ceria Nanoparticles in Crosslinked PVA Electrospun Nanofibers. NANOMATERIALS 2016; 6:nano6060102. [PMID: 28335230 PMCID: PMC5302628 DOI: 10.3390/nano6060102] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 05/09/2016] [Accepted: 05/24/2016] [Indexed: 12/04/2022]
Abstract
This paper introduces a new fluorescent nanocomposite of electrospun biodegradable nanofibers embedded with optical nanoparticles. In detail, this work introduces the fluorescence properties of PVA nanofibers generated by the electrospinning technique with embedded cerium oxide (ceria) nanoparticles. Under near-ultra violet excitation, the synthesized nanocomposite generates a visible fluorescent emission at 520 nm, varying its intensity peak according to the concentration of in situ embedded ceria nanoparticles. This is due to the fact that the embedded ceria nanoparticles have optical tri-valiant cerium ions, associated with formed oxygen vacancies, with a direct allowed bandgap around 3.5 eV. In addition, the impact of chemical crosslinking of the PVA on the fluorescence emission is studied in both cases of adding ceria nanoparticles in situ or of a post-synthesis addition via a spin-coating mechanism. Other optical and structural characteristics such as absorbance dispersion, direct bandgap, FTIR spectroscopy, and SEM analysis are presented. The synthesized optical nanocomposite could be helpful in different applications such as environmental monitoring and bioimaging.
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Affiliation(s)
- Nader Shehata
- Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt.
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt.
- The Utah Science Technology and Research Agency (USTAR) Bioinnovations center, Utah State University, Logan, UT 84341, USA.
| | - Soha Gaballah
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt.
- Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt.
| | - Effat Samir
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt.
- Department of Electrical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt.
| | - Aya Hamed
- Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt.
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt.
| | - Marwa Saad
- Center of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt.
- Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt.
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