Nanocrystalline cellulose composites with polyvinylpyrrolidone: Self-assembly and dispersibility in water

Composite films and aerogels of polyvinylpyrrolidone/cellulose nanocrystals (PVP/CNC) were prepared by solution casting and freeze-drying, respectively. For the first time, in the composite aerogels we have revealed PVP-assisted CNC self-assembly which produces reasonably uniform CNC aggregates with...

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Bibliographic Details
Published in:Composites communications 2019-10, Vol.15, p.108-112
Main Authors: Voronova, Marina I., Surov, Oleg V., Rubleva, Natalia V., Kochkina, Nataliya E., Afineevskii, Andrei V., Zakharov, Anatoly G.
Format: Article
Language:English
Subjects:
Dispersibility
Nanocrystalline cellulose
Polymer nanocomposite
Polyvinylpyrrolidone
Self-assembly
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Summary:Composite films and aerogels of polyvinylpyrrolidone/cellulose nanocrystals (PVP/CNC) were prepared by solution casting and freeze-drying, respectively. For the first time, in the composite aerogels we have revealed PVP-assisted CNC self-assembly which produces reasonably uniform CNC aggregates with a high aspect ratio (length/width). A possible model of the PVP-assisted CNC self-assembly was considered. Dispersibility of the composite aerogels in water was studied. It was shown that dispersing the composite aerogels in water resulted in stable colloidal suspensions. CNC particles size in the redispersed aqueous suspensions was near similar to the CNC particles size in never-dried CNC aqueous suspensions. •PVP/CNC composites were produced by freeze-drying and solution casting.•The composites morphology was described.•PVP assists CNC self-assembly into aggregates with a high aspect ratio.•Redispersibility of the freeze-dried composites was investigated.
ISSN:2452-2139
2452-2139
DOI:10.1016/j.coco.2019.07.006