| Texto completo | |
| Autor(es): |
Fernandes, Rafaella F.
;
Kalita, Naba K.
;
Liguori, Anna
;
Gonzalez, Ernesto A. Urquieta
;
Hakkarainen, Minna
;
Sobral, Paulo Jose A.
;
Otoni, Caio G.
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHEMSUSCHEM; v. N/A, p. 9-pg., 2025-02-26. |
| Resumo | |
Zeolites are a group of crystalline aluminosilicates with exchangeable cations and molecular-dimensioned micropores, which have successfully been applied to transform biomass and waste into biofuels. Herein, the effectiveness of acidic H-zeolites in biomass transformation and chemical valorization is demonstrated. In this process, the Br & oslash;nsted/Lewis acid sites in zeolites catalyze the transition of carbohydrates into valuable chemicals. beta-glucan polymer extracted from the lichen Usnea was catalytically converted into value-added molecules, such as glucose monomers. Particular challenges to elucidate the zeolite-catalyzed beta-glucan conversion to glucose were addressed, namely: (i) water as the solvent, ii) hydrolysis of the biopolymer in an ionic liquid of 1-Butyl-3-vinylimidazolium bromide ([BVinIm]Br), and iii) reaction time of 30, 60, 120, and 240 min. Effective hydrolysis of beta-glucan was achieved by H-zeolites (H-Beta, H-Mordenite, and H-ZSM-5), and the formed glucose was quantified through the dinitrosalicylic acid (DNS) method. Finally, applying H-zeolites as heterogeneous catalysts to prove the chemical recyclability of flexible films based on beta-glucan was demonstrated as a step forward in integrating biopolymer-based materials into the circular economy. (AU) | |
| Processo FAPESP: | 23/01339-3 - Beta-Glucana liquênica, biopolímero versátil e promissor para desenvolvimento de filmes biodegradáveis |
| Beneficiário: | Paulo José do Amaral Sobral |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 21/12394-0 - Métodos sintéticos sustentáveis empregando catálise, solventes verdes, reagentes seguros e materiais de partida renováveis |
| Beneficiário: | Arlene Gonçalves Corrêa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 23/09513-2 - b-Glucana liquênica, polissacarídeo versátil e promissor para desenvolvimento de filmes biodegradáveis |
| Beneficiário: | Rafaella Ferreira Fernandes |
| Modalidade de apoio: | Bolsas no Brasil - Programa Fixação de Jovens Doutores |
| Processo FAPESP: | 21/12071-6 - Arquitetando coloides via interações supramoleculares: de fundamentos a aplicações |
| Beneficiário: | Watson Loh |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |