Cellulose Nanofibrils/Xyloglucan Bio-Based Aerogels with Shape Recovery.
cellulose nanofibrils
freeze-casting
hydrogels
polysaccharides
porous microstructure
rheology properties
water absorption capacity
Journal
Gels (Basel, Switzerland)
ISSN: 2310-2861
Titre abrégé: Gels
Pays: Switzerland
ID NLM: 101696925
Informations de publication
Date de publication:
05 Jan 2021
05 Jan 2021
Historique:
received:
08
12
2020
revised:
22
12
2020
accepted:
31
12
2020
entrez:
20
1
2021
pubmed:
21
1
2021
medline:
21
1
2021
Statut:
epublish
Résumé
Bio-based aerogels containing cellulose nanofibrils (CNFs) are promising materials due to the inherent physical properties of CNF. The high affinity of cellulose to plant hemicelluloses (xyloglucan, xylan, pectin) is also an opportunity to develop biomaterials with new properties. Here, we prepared aerogels from gelled dispersions of CNFs and xyloglucan (XG) at different ratios by using a freeze-casting procedure in unidirectional (UD) and non-directional (ND) manners. As showed by rheology analysis, CNF and CNF/XG dispersions behave as true gels. We investigated the impact of the freezing procedure and the gel's composition on the microstructure and the water absorption properties. The introduction of XG greatly affects the microstructure of the aerogel from lamellar to cellular morphology. Bio-based aerogels showed high water absorption capacity with shape recovery after compression. The relation between morphology and aerogel compositions is discussed.
Identifiants
pubmed: 33466460
pii: gels7010005
doi: 10.3390/gels7010005
pmc: PMC7839008
pii:
doi:
Types de publication
Journal Article
Langues
eng
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