Rozdziały

Stały URI dla kolekcjihttp://hdl.handle.net/11652/4411

Przeglądaj

Filtry

20222

Ustawienia

Autorsearch.filters.applied.operator.equals: search.filters.author.Lewandowski, MarylineTematsearch.filters.applied.operator.equals: search.filters.subject.electrospinning

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Teraz wyświetlane 1 - 2 z 2
  • Pozycja
    Preparation of PVDF nanofibers by optimizing solvent properties: improved solvent viscosity and evaporation rate
    (Wydawnictwo Politechniki Łódzkiej, 2022) He, Zhongchen; Rault, François; Mohsenzadeh, Elham; Lewandowski, Maryline; Salaün, Fabien
    PVDF nanofibers have been intensively investigated in wearable energy harvesting because of their flexibility and piezoelectric properties. In this study, we prepared PVDF nanofibers by the electrospinning method. Different solvents like DMF and DMF/acetone with the ratio of 6/4, 5/5, and 4/6 were selected to adjust the solvent properties. SEM, FTIR, and DSC characterizations were used to characterize the morphology, structure, and β phase content of PVDF nanofibers. The results demonstrate that the electrospun PVDF nanofibers produced by using DMF/acetone have predominantly a fibre structure and increased β phase compared to electrospun samples using DMF alone as solvent. PVDF nanofibers fabricated by using DMF/acetone with a ratio of 4/6 exhibit the maximum content of β phase and the highest value of piezoelectric coefficient (d33).
  • Pozycja
    TPU-based elctrospun nanofibers assembled with nonwoven structure for face mask’s application
    (Wydawnictwo Politechniki Łódzkiej, 2022) Hebie, Ali; Moretti, Joséphine; Mohsenzadeh, Elham; Gidik, Hayriye; Lewandowski, Maryline; Vroman, Philippe
    The outbreak of Coronavirus Disease 2019 (COVID-19) has triggered great global public health concerns. Face masks are essential tools to reduce the spread of SARS-CoV-2 from human to human. However, there are still challenges with extending the serving life and maintaining the filtration performance of the current commercial masks. Filters composed of ultrafine fibers with diameters down to tens of nanometers have the potential to physically block viruses. The idea of developing an electrospun membrane with these ultrafine fibers to be integrated into the mask seems an innovative idea. A right mechanism must be developed to make it happen. This study presents the development of an electrospun membrane on a non-woven support by using thermoplastic polyurethane (TPU) for face masks.