Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/100802
DC Field | Value | Language |
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dc.contributor.author | Tomé, Luciana I. N. | - |
dc.contributor.author | Reis, Marco S. | - |
dc.contributor.author | Sousa, Hermínio C. de | - |
dc.contributor.author | Braga, Mara E. M. | - |
dc.date.accessioned | 2022-07-12T11:20:36Z | - |
dc.date.available | 2022-07-12T11:20:36Z | - |
dc.date.issued | 2022 | - |
dc.identifier.issn | 02540584 | pt |
dc.identifier.uri | https://hdl.handle.net/10316/100802 | - |
dc.description.abstract | An innovative aerogel obtained from a chitosan/xanthan gum polyelectrolyte complex (PEC) was developed in this work from the screening of thirteen different combinations of natural polyelectrolytes: two positively charged biopolymers (chitosan and gelatin A), six negatively-charged biopolymers (pectin, iota-carrageenan, collagen, xanthan gum, alginate and modified galactomannan), and a neutral polymer (guar gum) using the statistical design of experiments (DOE) approach. Only the chitosan-xanthan gum formed aerogels under supercritical conditions using carbon dioxide at 150 bar and 250 bar and 35 ◦C. The chitosan-xanthan gum-based aerogels have bone-like structures and smooth surfaces, with pore size distributions in the meso- and macropore ranges, the average pore diameter of ~20 nm and porosity between 60 and 70%. The specific surface areas of the aerogels processed at 150 bar and 250 bar are, respectively, 5.7 and 17.5 m2 g− 1, values below those commonly reported in the literature for aerogels. The aerogels are thermally stable up to ~240 ◦C, while the cryogel is thermally stable up to ~224 ◦C. The value of the total weight loss through thermal decomposition of the aerogels (~25%) is smaller than that of the cryogel (~40%). These materials have potential applications in the environmental and biomedical areas, providing solutions to the current challenges in biomedicine and social, demographic and sanitary life sciences. | pt |
dc.language.iso | eng | pt |
dc.publisher | Elsevier | pt |
dc.relation | POCI-01-0145-FEDER-032625 | pt |
dc.relation | PEst-C/EQB/UI0102/2019 | pt |
dc.relation | UIDB/00102/2020 | pt |
dc.relation | UIDP/00102/2020 | pt |
dc.relation | UIDB/04539/2020 | pt |
dc.rights | embargoedAccess | pt |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | pt |
dc.subject | Polyelectrolyte complexes | pt |
dc.subject | Aerogels | pt |
dc.subject | DOE | pt |
dc.subject | Supercritical-drying | pt |
dc.subject | Xanthan gum | pt |
dc.subject | Chitosan | pt |
dc.title | Chitosan-xanthan gum PEC-based aerogels: A chemically stable PEC in scCO2 | pt |
dc.type | article | - |
degois.publication.firstPage | 126294 | pt |
degois.publication.title | Materials Chemistry and Physics | pt |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0254058422006009 | pt |
dc.peerreviewed | yes | pt |
dc.identifier.doi | 10.1016/j.matchemphys.2022.126294 | pt |
degois.publication.volume | 287 | pt |
dc.date.embargo | 2024-01-01 | * |
uc.date.periodoEmbargo | 730 | pt |
item.fulltext | Com Texto completo | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
crisitem.author.researchunit | CIEPQPF – Chemical Process Engineering and Forest Products Research Centre | - |
crisitem.author.researchunit | CIEPQPF – Chemical Process Engineering and Forest Products Research Centre | - |
crisitem.author.researchunit | CIEPQPF – Chemical Process Engineering and Forest Products Research Centre | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.orcid | 0000-0003-1811-6178 | - |
crisitem.author.orcid | 0000-0002-4997-8865 | - |
crisitem.author.orcid | 0000-0002-2629-7805 | - |
crisitem.author.orcid | 0000-0003-4142-4021 | - |
crisitem.project.grantno | CIEPQPF- Chemical Engineering and Renewable Resources for Sustainability | - |
crisitem.project.grantno | CERES - Chemical Engineering and Renewable Resources for Sustainability | - |
crisitem.project.grantno | Center for Innovative Biomedicine and Biotechnology - CIBB | - |
Appears in Collections: | I&D CERES - Artigos em Revistas Internacionais |
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1-s2.0-S0254058422006009-main.pdf | 4.11 MB | Adobe PDF | View/Open |
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