Bioactive pectic polysaccharides from bay tree pruning waste: Sequential subcritical water extraction and application in active food packaging

The potential isolation of bio-active polysaccharides from bay tree pruning waste was studied using sequential subcritical water extraction using different time-temperature combinations. The extracted polysaccharides were highly enriched in pectins while preserving their high molecular mass (10–100 ...

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Bibliographic Details
Published in:	Carbohydrate polymers Vol. 272; p. 118477
Main Authors:	Rincón, E., Espinosa, E., García-Domínguez, M.T., Balu, A.M., Vilaplana, F., Serrano, L., Jiménez-Quero, A.
Format:	Journal Article
Language:	English
Published:	England Elsevier Ltd 15-11-2021
Subjects:	Anti-Bacterial Agents - chemistry Anti-Bacterial Agents - isolation & purification Anti-Bacterial Agents - pharmacology Antioxidant pectins Antioxidants - chemistry Antioxidants - isolation & purification Antioxidants - pharmacology Chitosan - chemistry Chitosan - pharmacology Circular biorefinery Food Packaging - methods Food packaging films Green extraction method Laurel Pectins - chemistry Pectins - isolation & purification Pectins - pharmacology Permeability Polysaccharides - chemistry Polysaccharides - isolation & purification Polysaccharides - pharmacology Steam Water - chemistry Circular biorefinery Antioxidant pectins Green extraction method Food packaging films Laurel
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Summary:	The potential isolation of bio-active polysaccharides from bay tree pruning waste was studied using sequential subcritical water extraction using different time-temperature combinations. The extracted polysaccharides were highly enriched in pectins while preserving their high molecular mass (10–100 kDa), presenting ideal properties for its application as additive in food packaging. Pectin-enriched chitosan films were prepared, improving the optical properties (≥95% UV-light barrier capacity), antioxidant capacity (˃95% radical scavenging activity) and water vapor permeability (≤14 g·Pa−1·s−1·m−1·10−7) in comparison with neat chitosan-based films. Furthermore, the antimicrobial activity of chitosan was maintained in the hybrid films. Addition of 10% of pectins improved mechanical properties, increasing the Young's modulus 12%, and the stress resistance in 51%. The application of pectin-rich fractions from bay tree pruning waste as an additive in active food packaging applications, with triple action as antioxidant, barrier, and antimicrobial has been demonstrated. [Display omitted] •Bioactive pectic polysaccharides from bay tree pruning waste (BTPW)•BTPW-pectins preserved their high molecular weight by subcritical water extraction.•Pectin-enriched chitosan films exhibited antioxidant and antimicrobial properties.•Bioactive films showed interesting water vapor and UV-light barrier properties.•Biobased films made of chitosan and pectins can be used for food packaging applications.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0144-8617 1879-1344 1879-1344
DOI:	10.1016/j.carbpol.2021.118477