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Surface Functionalization of Face Masks with Cold Plasma and Its Effect in Anchoring Polyphenols Extracted from Agri-Food
Authors:Francesca Cicogna  Emilia Bramanti  Beatrice Campanella  Stefano Caporali  Luca Panariello  Caterina Cristallini  Randa Ishak  Niccoletta Barbani  Elisa Passaglia  Serena Coiai
Affiliation:1.Institute of Chemistry of OrganoMetallic Compounds (CNR-ICCOM), National Research Council, SS Pisa, Via Moruzzi 1, 56124 Pisa, Italy;2.Department of Industrial Engineering, DIEF, University of Florence, Via S. Marta 3, 50139 Firenze, Italy;3.Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 1, 56122 Pisa, Italy;4.Institute for Physical and Chemical Processes (CNR-IPCF), National Research Council, SS Pisa, Largo L. Lazzarino 1, 56122 Pisa, Italy
Abstract:
To improve the capability of non-woven polypropylene-based fabric (NWF-PP) used for face mask production to retain active biomolecules such as polyphenols, the surface functionalization of NWF-PP–directly cut from face masks–was carried out by employing cold plasma with oxygen. The nature/structure of the functional groups, as well as the degree of functionalization, were evaluated by ATR-FTIR and XPS by varying the experimental conditions (generator power, treatment time, and oxygen flow). The effects of plasma activation on mechanical and morphological characteristics were evaluated by stress–strain measurements and SEM analysis. The ability of functionalized NWF-PP to firmly anchor polyphenols extracted from cloves was estimated by ATR-FTIR analysis, IR imaging, extractions in physiological solution, and OIT analysis (before and after extraction), as well as by SEM analysis. All the results obtained converge in showing that, although the plasma treatment causes changes–not only on the surface–with certain detriment to the mechanical performance of the NWF-PP, the incorporated functionalities are able to retain/anchor the active molecules extracted from the cloves, thus stabilizing the treated surfaces against thermo-oxidation even after prolonged extraction.
Keywords:cold plasma activation   surface functionalization   ATR-FTIR   OIT   polyphenols   eugenol   fibers morphology
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