Journal
CARBOHYDRATE POLYMERS
Volume 207, Issue -, Pages 169-179Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.11.079
Keywords
Starch composite; Cellulose nanofibers; Enzymatic hydrolysis; Nanofiber cytotoxicity
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [140274/2014-6]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [2952/2011]
- CAPES/FCT [349/13]
- Foundation for Science and Technology (FCT) [SFRH/BPD/89992/2012]
- FCT [UID/BIO/04469/2013, POCI-01-0145-FEDER-006684]
- European Regional Development Fund [NORTE-01-0145-FEDER-000004]
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The potential use of cellulose nanofibers (CNFs) as a reinforcing agent in banana starch-based nanocomposite films was investigated. CNFs were isolated from banana peel (Musa paradisiaca) by enzymatic hydrolysis. Banana starch-based nanocomposite films were prepared with CNFs using the casting method. CNFs effect on cell viability and on nanocomposite films properties' was investigated. The cytotoxicity of CNFs was assessed on Caco-2 cell line. CNFs were not cytotoxic at 50-2000 mu g/mL. However, CNFs above 2000 mu g/mL significantly decreased cell viability. Topography analysis showed that the incorporation of CNFs modified the film structure. The nanocomposites exhibited a complex structure due to strong interactions between CNFs and starch matrix, promoting a remarkable improvement on mechanical and water barrier properties, opacity and UV light barrier compared to the control film. CNFs can offer a great potential as reinforcing material for starch-based nanocomposite films, producing a value-added food packaging from a waste material.
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