Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Kevlar® and Nomex® modification via 2,4-dihydroxybenzophenone anchoring improves water repellency and induces antibacterial and UV protection properties
Δημιουργός/Συγγραφέας:	Tonis, Efstathios Frousiou, Efrosyni Heliopoulos, Nikolaos S. Kagkoura, Antonia Stangel, Christina Canton-Vitoria, Ruben Vasilakos, Sozon Siamidis, Dionysios Galeou, Angeliki Stamatakis, Kostas Prombona, Anastasia Boukos, Nikos [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos Vougioukalakis, Georgios C.
Ημερομηνία:	2023
Γλώσσα:	Αγγλικά
ISSN:	24685194
DOI:	10.1016/j.mtchem.2023.101695
Περίληψη:	Aramid materials, such as Kevlar® and Nomex®, are aromatic polyamides exhibiting excellent chemical and mechanical properties. Because of their demanding applications, it is essential to enhance their water repellency, their endurance to UV radiation, as well as their antibacterial properties, while simultaneously preserving or even strengthening their durability. The present work describes the successful modification of aramid materials, in a way that improves the final product, by inducing the desired properties without significantly affecting the existing ones. The synthesis of a model compound simulating aramid materials is carried out followed by thorough studies, thus leading to a better understanding of the behavior of aramid materials at the molecular level, as well as to their optimal modification conditions. Subsequently, the attachment of 2,4-dihydroxybenzophenone to Kevlar® and Nomex® fabrics, using epichlorohydrin as the anchoring moiety, along with detailed characterization, via IR and Raman spectroscopies, thermogravimetric analysis, and SEM imaging, are implemented. The wettability of the modified materials is determined by the water contact angle test, to probe their hydrophilicity or hydrophobicity. The antibacterial protection of the modified aramid materials is determined qualitatively against the Gram-negative bacterium E. coli DH5α and quantitatively according to an in situ method, using cyanobacterium Synechococcus sp. PCC7942. Moreover, the UV protection properties of the modified fabrics are studied by using the UV protection factor (UPF) and average UV-A and UV-B transmittance, while their ultimate strength is found well-preserved.
Τίτλος πηγής δημοσίευσης:	Materials Today Chemistry
Τόμος/Κεφάλαιο:	33
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Βιοχημεία[EN] Biochemistry
Λέξεις-Κλειδιά:	2,4-Dihydroxybenzophenone Antibacterial activity Aramids Chemical modification Durability Epichlorohydrin Kevlar® Nomex® Ultraviolet protection Water repellency
EU Grant identifier:	Τ2EDK-01316
Κάτοχος πνευματικών δικαιωμάτων:	© 2023 Elsevier Ltd. All rights reserved.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1016/j.mtchem.2023.101695
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο