Published October 25, 2018 | Version v1
Journal article Open

Strong, Ductile, and Waterproof Cellulose Nanofibril Composite Films with Colloidal Lignin Particles


ABSTRACT: Brittleness has hindered commercialization of cellulose nanofibril (CNF) films. The use of synthetic polymers and plasticizers is a known detour that impairs biodegradability and carbon footprint of the product. Herein, we utilize a variety of softwood Kraft lignin morphologies to obtain strong and ductile CNF nanocomposite films. An optimum 10 wt % content of colloidal lignin particles (CLPs) produced films with nearly double the toughness compared to a CNF film without lignin. CLPs rendered the films
waterproof, provided antioxidant activity and UV-shielding with better visible light transmittance than obtained with microscopy, dynamic water sorption analysis, and tp-DSC that homogeneously distributed CLPs act as ball bearing lubricating and stress transferring agents in the CNF matrix. Overall, our results open new avenues for the utilization of lignin nanoparticles in biopolymer composites equipped with versatile functionalities for applications in food packaging, water purification, and biomedicine.


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Zelcor – Zero Waste Ligno-Cellulosic Biorefineries by Integrated Lignin Valorisation 720303
European Commission
Scalable manufacturing of lignin-based functional materials for industrial applications 296547
Academy of Finland
Interaction between living cells and biomimetic hydrogels-MIMEGEL 278279
Academy of Finland