4.7 Article

Optimization of antibacterial and mechanical properties of an active LDPE/starch/nanoclay nanocomposite film incorporated with date palm seed extract using D-optimal mixture design approach

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ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.04.139

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Date palm seed; D-optimal mixture design; Mechanical properties; Antibacterial properties

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  1. National Nutrition and Food Technology Research Institute (NNFTRI) of Iran

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A novel active LDPE/TPS nanocomposite films containing date palm seed extracts (Kabkab variety) were devel-oped using D-optimal mixture design. 20 different blends of components including LDPE, TPS, Cloisite 20A, PE -g-MA, EDTA and date palm seed extract in different proportions were prepared. Using trace and counter plots the effects of each component on the mechanical and antibacterial properties of the composites were studied. The results showed that the films containing a mixture of date seed extract and EDTA had notable antibacterial activity against E. coli and S. aureus; however, these components weakened the mechanical properties of the pre-pared films. At the same time Cloisite 20A nanoparticles strengthened the films mechanical properties. The optimized formulation for the overall best antibacterial and mechanical properties was 67.5 wt% for LDPE, 4.1 wt% for date seed extract, 2.8 wt% for Cloisite 20A and 2.5 wt% for EDTA. The studied properties of the manufactured film samples were close to the values predicted by the model. (C) 2020 Elsevier B.V. All rights reserved.

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