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    Robust Guar Gum/Cellulose Nanofibrils Multilayer Films with Good Barrier Properties

    Year: 2017

    Journal: ACS Appl. Mater. Interfaces, Volume 9, FEB 15, page 5477–5485

    Authors: Dai, Lei; Long, Zhu; Chen, Jie; An, Xingye; Cheng, Dong; Khan, Avik; Ni, Yonghao

    Organizations: Canada Research Chairs Program

    Keywords: cationic guar gum; cellulose nanofibrils; multilayer; gas barrier; oil barrier

    The pursuit of sustainable functional materials requires development of materials based on renewable resources and efficient fabrication methods. Hereby, we fabricated all -polysaccharides multilayer films using cationic guar gum (CGG) and anionic cellulose nanofibrils (i.e., TEMPO-oxidized cellulose nano-fibrils, TOCNs) through a layer-by-layer casting method. This technique is based on alternate depositions of oppositely charged water-based CGG and TOCNs onto laminated films. The resultant polyelectrolyte multilayer films were transparent, ductile, and strong. More importantly, the self-standing films exhibited excellent gas (water vapor and Oxygen) and oil barrier performances. Another outstanding feature of these resultant flirts was their resistance to various organic solvents including Methanol, acetone, N,N-dimethylacetamide (DMAc) and tetrahydrofuran (THF). The proposed film fabrication process is environmentally benign, cost-effective, and,easy to scale-up. The developed CGG/TOCNs multilayer films can be used as a renewable material for industrial applications such as packaging.
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