Autor segons l'article: Del Pezzo R; Bandeira N; Trojanowska A; Fernandez Prieto S; Underiner T; Giamberini M; Tylkowski B
Departament: Enginyeria Química
Autor/s de la URV: Giamberini, Marta / Tylkowski, Bartosz
Paraules clau: To-trans isomerization Solvent Photoresponsive polymers Photoisomerization Ortho-substituted azobenzene Microcapsules Lowest electronic states Interfacial polymerization Encapsulation Derivatives Chemistry for beauty and health 2018 Azo Ab-initio
Resum: ©2018 IUPAC & De Gruyter. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. For more information, please visit: http://creativecommons.org/licenses/by-nc-nd/4.0/ 2018. Novel functional polymeric microcapsules, based on modified azobenzene moieties, are exhaustively investigated, both from a theoretical and experimental points of view. Theoretical calculations and several measurements demonstrate that visible light can act as a trigger for release of encapsulated material, as a consequence of trans-cis isomerization which modifies microcapsule surface topography and can induce a squeezing release mechanism. Interfacial polymerization of an oil-in-water emulsion is performed and leads to core-shell microcapsules which are characterized by means of atomic force microscopy (AFM), optical microscopy (OM), scanning electron microscopy (SEM) and light scattering. These analyses put into evidence that microcapsules' size and surface morphology are strongly affected by irradiation under visible light: moreover, these changes can be reverted by sample exposure to temperatures around 50°C. This last evidence is also confirmed by NMR kinetic analyses on modified azobenzene moiety. Finally, it is shown that these smart microcapsules can be successfully used to get a controlled release of actives such as fragrancies, as a consequence of visible light irradiation, as confirmed by an olfactive panel.
Àrees temàtiques: Química Interdisciplinar General chemistry General chemical engineering Farmacia Ensino Engenharias ii Educação Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemistry Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Biodiversidade Astronomia / física
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0033-4545
Adreça de correu electrònic de l'autor: bartosz.tylkowski@urv.cat marta.giamberini@urv.cat
Identificador de l'autor: 0000-0002-4163-0178 0000-0001-8278-3552
Data d'alta del registre: 2023-07-31
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.degruyter.com/view/journals/pac/91/9/article-p1533.xml
Referència a l'article segons font original: Pure And Applied Chemistry. 91 (9): 1533-1546
Referència de l'ítem segons les normes APA: Del Pezzo R; Bandeira N; Trojanowska A; Fernandez Prieto S; Underiner T; Giamberini M; Tylkowski B (2019). Ortho-substituted azobenzene: Shedding light on new benefits. Pure And Applied Chemistry, 91(9), 1533-1546. DOI: 10.1515/pac-2018-0719
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
DOI de l'article: 10.1515/pac-2018-0719
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2019
Tipus de publicació: Journal Publications