Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7789479 | Carbohydrate Polymers | 2015 | 34 Pages |
Abstract
In the present work, thermoplastic maize starch based bionanocomposites were prepared as transparent films, plasticized with 35% of glycerol and reinforced with both waxy starch (WSNC) and cellulose nanocrystals (CNC), previously extracted by acidic hydrolysis. The influence of the nanofiller content was evaluated at 1Â wt.%, 2.5Â wt.% and 5Â wt.% of WSNC. The effect of adding the two different nanoparticles at 1Â wt.% was also investigated. As determined by tensile measurements, mechanical properties were improved at any composition of WSNC. Water vapour permeance values maintained constant, whereas barrier properties to oxygen reduced in a 70%, indicating the effectiveness of hydrogen bonding at the interphase. The use of CNC or CNC and WSNC upgraded mechanical results, but no significant differences in barrier properties were obtained. A homogeneous distribution of the nanofillers was demonstrated by atomic force microscopy, and a shift of the two relaxation peaks to higher temperatures was detected by dynamic mechanical analysis.
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Authors
Kizkitza González, Aloña Retegi, Alba González, Arantxa Eceiza, Nagore Gabilondo,