Cellulose Nanofibrils/Xyloglucan Bio-Based Aerogels with Shape Recovery

Gels

Bruno Novalès¹  Samuel Mandin²  Jean-Eudes Maigret²  Bernard Cathala²  Samuel Moreau²  Malika Talantikite²  Céline Moreau² 

[1] UR1268 BIA, BIBS Facility, INRAE, 44300 Nantes, France;UR1268 BIA, INRAE, 44300 Nantes, France;

关键词: cellulose nanofibrils;    polysaccharides;    rheology properties;    hydrogels;    freeze-casting;    porous microstructure;   

DOI  :  10.3390/gels7010005

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown