Autor según el artículo: Del Pezzo R; Bandeira N; Trojanowska A; Fernandez Prieto S; Underiner T; Giamberini M; Tylkowski B

Departamento: Enginyeria Química

Autor/es de la URV: Giamberini, Marta / Tylkowski, Bartosz

Palabras clave: 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

Resumen: ©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.

Áreas temáticas: 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

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 0033-4545

Direcció de correo del autor: bartosz.tylkowski@urv.cat marta.giamberini@urv.cat

Identificador del autor: 0000-0002-4163-0178 0000-0001-8278-3552

Fecha de alta del registro: 2023-07-31

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: https://www.degruyter.com/view/journals/pac/91/9/article-p1533.xml

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Pure And Applied Chemistry. 91 (9): 1533-1546

Referencia 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

DOI del artículo: 10.1515/pac-2018-0719

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2019

Tipo de publicación: Journal Publications