Author, as appears in the article.: Rajczak E; Tylkowski B; Constantí M; Haponska M; Trusheva B; Malucelli G; Giamberini M

Department: Enginyeria Química

URV's Author/s: Constantí Garriga, Magdalena / Giamberini, Marta / Tylkowski, Bartosz

Keywords: Toxicity Therapy Tea powder Propolis Matrix Green tea Galla-chinensis Films Extracts Constituents Biological-properties Antibacterial activity Acrylic membrane propolis antibacterial activity acrylic membrane

Abstract: © 2020 by the authors. We examine the behaviour of acrylic resin-based membranes containing natural antioxidants, 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.

Thematic Areas: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 2073-4360

Author's mail: bartosz.tylkowski@urv.cat magdalena.constanti@urv.cat marta.giamberini@urv.cat

Author identifier: 0000-0002-4163-0178 0000-0002-3547-4199 0000-0001-8278-3552

Record's date: 2023-02-19

Journal volume: 12

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.mdpi.com/2073-4360/12/2/358

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Polymers. 12 (2):

APA: Rajczak E; Tylkowski B; Constantí M; Haponska M; Trusheva B; Malucelli G; Giamberini M (2020). Preparation and characterization of UV-curable acrylic membranes embedding natural antioxidants. Polymers, 12(2), -. DOI: 10.3390/polym12020358

Article's DOI: 10.3390/polym12020358

Entity: Universitat Rovira i Virgili

Journal publication year: 2020

Publication Type: Journal Publications