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Your search keyword '"Stachewicz, Urszula"' showing total 21 results
Start Over Author "Stachewicz, Urszula" Publisher american chemical society (acs)
21 results on '"Stachewicz, Urszula"'

5. Surface Potential Driven Water Harvesting from Fog

Author

Ura, Daniel P., primary, Knapczyk-Korczak, Joanna, additional, Szewczyk, Piotr K., additional, Sroczyk, Ewa A., additional, Busolo, Tommaso, additional, Marzec, Mateusz M., additional, Bernasik, Andrzej, additional, Kar-Narayan, Sohini, additional, and Stachewicz, Urszula, additional

Published
2021
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10. Enhanced Piezoelectricity of Electrospun Polyvinylidene Fluoride Fibers for Energy Harvesting

Author

Szewczyk, Piotr K., primary, Gradys, Arkadiusz, additional, Kim, Sung Kyun, additional, Persano, Luana, additional, Marzec, Mateusz, additional, Kryshtal, Aleksandr, additional, Busolo, Tommaso, additional, Toncelli, Alessandra, additional, Pisignano, Dario, additional, Bernasik, Andrzej, additional, Kar-Narayan, Sohini, additional, Sajkiewicz, Paweł, additional, and Stachewicz, Urszula, additional

Published
2020
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20. Triboelectric Yarns with Electrospun Functional Polymer Coatings for Highly Durable and Washable Smart Textile Applications

Author

Tommaso Busolo, Sohini Kar-Narayan, Urszula Stachewicz, Malavika Nair, Piotr K. Szewczyk, Szewczyk, Piotr K [0000-0003-1441-7387], Stachewicz, Urszula [0000-0001-5102-8685], Kar-Narayan, Sohini [0000-0002-8151-1616], and Apollo - University of Cambridge Repository

Subjects
energy harvesting, Textile, Materials science, Abrasion (mechanical), 02 engineering and technology, Carbon nanotube, engineering.material, 010402 general chemistry, 01 natural sciences, smart textiles, law.invention, Coating, triboelectric devices, law, General Materials Science, Composite material, electrospinning, Triboelectric effect, business.industry, triboelectric yarn, Yarn, 021001 nanoscience & nanotechnology, Electrospinning, 0104 chemical sciences, Rubbing, visual_art, engineering, visual_art.visual_art_medium, 0210 nano-technology, business, Research Article
Abstract

Triboelectric generators are excellent candidates for smart textiles applications due to their ability to convert mechanical energy into electrical energy. Such devices can be manufactured into yarns by coating a conductive core with a triboelectric material, but current triboelectric yarns lack the durability and washing resistance required for textile-based applications. In this work, we develop a unique triboelectric yarn comprising a conducting carbon nanotube (CNT) yarn electrode coated with poly(vinylidene fluoride) (PVDF) fibers deposited by a customized electrospinning process. We show that the electrospun PVDF fibers adhere extremely well to the CNT core, producing a uniform and stable triboelectric coating. The PVDF–CNT coaxial yarn exhibits remarkable triboelectric energy harvesting during fatigue testing with a 33% power output improvement and a peak power density of 20.7 μW cm–2 after 200 000 fatigue cycles. This is potentially due to an increase in the active surface area of the PVDF fiber coating upon repeated contact. Furthermore, our triboelectric yarn meets standard textile industry benchmarks for both abrasion and washing by retaining functionality over 1200 rubbing cycles and 10 washing cycles. We demonstrate the energy harvesting and motion sensing capabilities of our triboelectric yarn in prototype textile-based applications, thereby highlighting its applicability to smart textiles.

Published
2021

21. Surface Potential Driven Water Harvesting from Fog

Author

Mateusz M. Marzec, Ewa A Sroczyk, Daniel P. Ura, Tommaso Busolo, Urszula Stachewicz, Andrzej Bernasik, Joanna Knapczyk-Korczak, Sohini Kar-Narayan, Piotr K. Szewczyk, Ura, Daniel P [0000-0001-6330-6873], Knapczyk-Korczak, Joanna [0000-0003-3668-6123], Szewczyk, Piotr K [0000-0003-1441-7387], Sroczyk, Ewa A [0000-0002-4454-4179], Busolo, Tommaso [0000-0003-1815-9557], Marzec, Mateusz M [0000-0001-9834-3930], Kar-Narayan, Sohini [0000-0002-8151-1616], Stachewicz, Urszula [0000-0001-5102-8685], and Apollo - University of Cambridge Repository

Subjects
Electrical polarity, surface potential, General Physics and Astronomy, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, electrical polarity, Article, Rainwater harvesting, Ultimate tensile strength, General Materials Science, Fiber, Composite material, Polycarbonate, electrospinning, General Engineering, Humidity, 021001 nanoscience & nanotechnology, Electrospinning, 0104 chemical sciences, polycarbonate, water harvesting, fog collectors, visual_art, visual_art.visual_art_medium, Electric potential, 0210 nano-technology
Abstract

Access to clean water is a global challenge, and fog collectors are a promising solution. Polycarbonate (PC) fibers have been used in fog collectors but with limited efficiency. In this study, we show that controlling voltage polarity and humidity during the electrospinning of PC fibers improves their surface properties for water collection capability. We experimentally measured the effect of both the surface morphology and the chemistry of PC fiber on their surface potential and mechanical properties in relation to the water collection efficiency from fog. PC fibers produced at high humidity and with negative voltage polarity show a superior water collection rate combined with the highest tensile strength. We proved that electric potential on surface and morphology are crucial, as often designed by nature, for enhancing the water collection capabilities via the single-step production of fibers without any postprocessing needs.

Published
2021

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