期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 9, 页码 4948-4959出版社
AMER CHEMICAL SOC
DOI: 10.1021/am301325r
关键词
cellulose nanocrystals; microfibrillated cellulose; oxidation; alginate; crosslinked sponge
资金
- China Scholarship Council (CSC) [2011695007]
Crosslinked polysaccharide sponges have been prepared by freeze-drying of amorphous alginate-oxidized nanocellulose in the presence of a Ca2+ ionic crosslinking agent. The new carboxyl groups on the surface of nanocellulose induced by the chemical oxidization provided the possibility of participating in the construction of an alginate-based sponge's structure and played a fundamental role in the structural and mechanical stability of ensuing sponges. Furthermore, enhanced mechanical strength induced by oxidized cellulose nanocrystals and interpenetrating polymer network from oxidized microfibrillated cellulose were reported. Together with the facile and ionic crosslinking process, the ultrahigh porosity, promising water absorption and retention, as well as the improved compression strength of the crosslinked sponges should significantly extend the use of this soft material in diverse practical applications.
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