Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10316/100802
Título: | Chitosan-xanthan gum PEC-based aerogels: A chemically stable PEC in scCO2 | Autor: | Tomé, Luciana I. N. Reis, Marco S. Sousa, Hermínio C. de Braga, Mara E. M. |
Palavras-chave: | Polyelectrolyte complexes; Aerogels; DOE; Supercritical-drying; Xanthan gum; Chitosan | Data: | 2022 | Editora: | Elsevier | Projeto: | POCI-01-0145-FEDER-032625 PEst-C/EQB/UI0102/2019 info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB/04539/2020/PT UIDB/00102/2020 UIDP/00102/2020 |
Título da revista, periódico, livro ou evento: | Materials Chemistry and Physics | Volume: | 287 | Resumo: | 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. | URI: | https://hdl.handle.net/10316/100802 | ISSN: | 02540584 | DOI: | 10.1016/j.matchemphys.2022.126294 | Direitos: | embargoedAccess |
Aparece nas coleções: | I&D CIEPQPF - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
1-s2.0-S0254058422006009-main.pdf | 4.11 MB | Adobe PDF | Ver/Abrir |
Citações SCOPUSTM
8
Visto em 15/abr/2024
Citações WEB OF SCIENCETM
7
Visto em 2/abr/2024
Visualizações de página
102
Visto em 16/abr/2024
Downloads
37
Visto em 16/abr/2024
Google ScholarTM
Verificar
Altmetric
Altmetric
Este registo está protegido por Licença Creative Commons