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Polysaccharide/Silica Microcapsules Prepared via Ionic Gelation Combined with Spray Drying: Application in the Release of Hydrophilic Substances and Catalysis

Polysaccharide/silica hybrid microcapsules were prepared using ionic gelation followed by spray-drying. Chitosan and alginate were used as biopolymer matrices, and in situ prepared silica was used as a structuring additive. The prepared microparticles were used in two very different applications: th...

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Autores principales: Elzayat, Asmaa M., Adam-Cervera, Inés, Albus, Marie, Cháfer, Amparo, Badia, José D., Pérez-Pla, Francisco F., Muñoz-Espí, Rafael
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10610447/
https://www.ncbi.nlm.nih.gov/pubmed/37896359
http://dx.doi.org/10.3390/polym15204116
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author Elzayat, Asmaa M.
Adam-Cervera, Inés
Albus, Marie
Cháfer, Amparo
Badia, José D.
Pérez-Pla, Francisco F.
Muñoz-Espí, Rafael
author_facet Elzayat, Asmaa M.
Adam-Cervera, Inés
Albus, Marie
Cháfer, Amparo
Badia, José D.
Pérez-Pla, Francisco F.
Muñoz-Espí, Rafael
author_sort Elzayat, Asmaa M.
collection PubMed
description Polysaccharide/silica hybrid microcapsules were prepared using ionic gelation followed by spray-drying. Chitosan and alginate were used as biopolymer matrices, and in situ prepared silica was used as a structuring additive. The prepared microparticles were used in two very different applications: the encapsulation of hydrophilic molecules, and as a support for palladium nanoparticles used as catalysts for a model organic reaction, namely the reduction of p-nitrophenol by sodium borhydride. In the first application, erioglaucine disodium salt, taken as a model hydrophilic substance, was encapsulated in situ during the preparation of the microparticles. The results indicate that the presence of silica nanostructures, integrated within the polymer matrix, affect the morphology and the stability of the particles, retarding the release of the encapsulated substance. In the second application, chloropalladate was complexed on the surface of chitosan microparticles, and palladium(II) was subsequently reduced to palladium(0) to obtain heterogeneous catalysts with an excellent performance.
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spelling pubmed-106104472023-10-28 Polysaccharide/Silica Microcapsules Prepared via Ionic Gelation Combined with Spray Drying: Application in the Release of Hydrophilic Substances and Catalysis Elzayat, Asmaa M. Adam-Cervera, Inés Albus, Marie Cháfer, Amparo Badia, José D. Pérez-Pla, Francisco F. Muñoz-Espí, Rafael Polymers (Basel) Article Polysaccharide/silica hybrid microcapsules were prepared using ionic gelation followed by spray-drying. Chitosan and alginate were used as biopolymer matrices, and in situ prepared silica was used as a structuring additive. The prepared microparticles were used in two very different applications: the encapsulation of hydrophilic molecules, and as a support for palladium nanoparticles used as catalysts for a model organic reaction, namely the reduction of p-nitrophenol by sodium borhydride. In the first application, erioglaucine disodium salt, taken as a model hydrophilic substance, was encapsulated in situ during the preparation of the microparticles. The results indicate that the presence of silica nanostructures, integrated within the polymer matrix, affect the morphology and the stability of the particles, retarding the release of the encapsulated substance. In the second application, chloropalladate was complexed on the surface of chitosan microparticles, and palladium(II) was subsequently reduced to palladium(0) to obtain heterogeneous catalysts with an excellent performance. MDPI 2023-10-17 /pmc/articles/PMC10610447/ /pubmed/37896359 http://dx.doi.org/10.3390/polym15204116 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Elzayat, Asmaa M.
Adam-Cervera, Inés
Albus, Marie
Cháfer, Amparo
Badia, José D.
Pérez-Pla, Francisco F.
Muñoz-Espí, Rafael
Polysaccharide/Silica Microcapsules Prepared via Ionic Gelation Combined with Spray Drying: Application in the Release of Hydrophilic Substances and Catalysis
title Polysaccharide/Silica Microcapsules Prepared via Ionic Gelation Combined with Spray Drying: Application in the Release of Hydrophilic Substances and Catalysis
title_full Polysaccharide/Silica Microcapsules Prepared via Ionic Gelation Combined with Spray Drying: Application in the Release of Hydrophilic Substances and Catalysis
title_fullStr Polysaccharide/Silica Microcapsules Prepared via Ionic Gelation Combined with Spray Drying: Application in the Release of Hydrophilic Substances and Catalysis
title_full_unstemmed Polysaccharide/Silica Microcapsules Prepared via Ionic Gelation Combined with Spray Drying: Application in the Release of Hydrophilic Substances and Catalysis
title_short Polysaccharide/Silica Microcapsules Prepared via Ionic Gelation Combined with Spray Drying: Application in the Release of Hydrophilic Substances and Catalysis
title_sort polysaccharide/silica microcapsules prepared via ionic gelation combined with spray drying: application in the release of hydrophilic substances and catalysis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10610447/
https://www.ncbi.nlm.nih.gov/pubmed/37896359
http://dx.doi.org/10.3390/polym15204116
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