| Titre : |
Preparation, characterization, and antibacterial activity of photocured thymol-doped acrylic resins |
| Type de document : |
texte imprimé |
| Auteurs : |
Micaela Degli Esposti, Auteur ; Francesco Pilati, Auteur ; Moreno Bondi, Auteur ; Simona de Niederhäusern, Auteur ; Ramona Iseppi, Auteur ; Maurizio Toselli, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 371-379 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Antibactériens
Caractérisation
Matières plastiques -- Additifs
Photoréticulation
Polyacryliques
ThymolLe thymol est un phénol contenu dans l'huile de thym et dans les huiles essentielles (volatiles) de plusieurs autres plantes. Il se présente sous forme de cristaux incolores avec une odeur aromatique caractéristique. Il est soluble dans les alcools, le gras et l'huile et peu soluble dans l'eau. On l'utilise notamment pour ses propriétés antiseptiques, antibactériennes et antifongiques ainsi que pour stabiliser les préparations pharmaceutiques. (Dorland, 28th ed.).
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This article describes the preparation of thymol-doped acrylic resins by photopolymerization of solutions of thymol in tripropylenglycoldiacrylic monomer. This provides an easy, energy-saving, and environmental friendly process to prepare antibacterial plastics (fulfilling most of the “green chemistry” requirements). The results demonstrate that thymol can be included in the resin even at high concentration (up to 28.6%) without affecting the photocuring reaction and losing transparency. The glass transition temperature of the doped resin decreases when the thymol content increases, as it behaves like a plasticizer with respect to the acrylic resin. As indicated by HPLC analysis, thymol can be released in liquid media at a rate that depends on the chemical nature of the liquid. Evaluation by agar diffusion assays showed an antibacterial activity on both Gram-negative and Gram-positive bacteria (Staphylococcus aureus, Listeria monocytogenes, and Escherichia coli). The antibacterial activity can occur just on the plastic surface when the thymol-doped resins is applied as thin coating, while it is evident also in the surrounding agar medium for doped plastic discs, 1.2 mm thick with a concentration of thymol in the resin higher than 16.7%. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of the photocured resins - Characterization of the photocured resins - Thymol-release tests - Antibacterial activity evaluation
- RESULTS AND DISCUSSION : Photocuring reaction of TPGDA - Characterization of the thymol-doped photocured resin - Solvent sorption kinetics and swelling ratio of the TPGDA resin and thymol-release tests - Antibacterial |
| DOI : |
10.1007/s11998-012-9453-3 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9453-3.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18736 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 3 (05/2013) . - p. 371-379
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