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Open AccessArticle

Preparation and Characterization of UV-Curable Acrylic Membranes Embedding Natural Antioxidants

Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
Politecnico di Torino - Dipartimento di Scienza Applicata e Tecnologia, Viale Teresa Michel 5, 15121 Alessandria, Italy
Eurecat, Centre Tecnològic de Catalunya, C/Marcel·lí Domingo, 43007 Tarragona, Spain
Department of Chemical Engineering (DEQ), Universitat Rovira i Virgili, Av. Països Catalans, 26, 43007 Tarragona, Spain
Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Author to whom correspondence should be addressed.
Polymers 2020, 12(2), 358;
Received: 18 December 2019 / Revised: 20 January 2020 / Accepted: 29 January 2020 / Published: 6 February 2020
(This article belongs to the Special Issue Thermosets II)
We examine the behaviour of acrylic resin-based membranes containing natural anti-oxidants, such as Galla Chinensis tea powder extract (TP) and Taiwanese green propolis (TGP), in different concentrations ranging between 5 and 20 wt %. Membrane morphology was investigated by means of Environmental Scanning Electron Microscopy (ESEM), while the UV-curing reaction was monitored by Fourier-Transform Infra-red (FTIR) spectroscopy. In most cases Thermogravimetric (TG), Differential Scanning Calorimetric (DSC) and Dynamo-mechanical Thermal (DMT) analyses showed that the desirable characteristics of the UV-cured acrylic resin are not substantially altered by the presence of the organic fillers. The release kinetics of polyphenols and flavonoids, determined in water for TP-containing membranes (ETx) and in ethanol/water mixture (7:3 v/v) for TGP-containing ones (EPx), was satisfactory, reaching a plateau after 24 h. Finally, preliminary antibacterial tests against S. Epidermidis were performed on the membranes with higher additive amount and gave positive results for ET-type; on the contrary, no inhibitory effect was observed for the tested EP-type membranes.
Keywords: acrylic membrane; tea powder; propolis; antibacterial activity acrylic membrane; tea powder; propolis; antibacterial activity
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MDPI and ACS Style

Rajczak, E.; Tylkowski, B.; Constantí, M.; Haponska, M.; Trusheva, B.; Malucelli, G.; Giamberini, M. Preparation and Characterization of UV-Curable Acrylic Membranes Embedding Natural Antioxidants. Polymers 2020, 12, 358.

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