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Antioxidant starch films containing sunflower hull extracts
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Glycoscience. Univ Politecn Valencia, Inst Ingn Alimentos Desarrolla, Dept Tecnol Alimentos, Valencia, Spain..ORCID iD: 0000-0002-7132-1413
Univ Politecn Valencia, Inst Ingn Alimentos Desarrolla, Dept Tecnol Alimentos, Valencia, Spain..
Univ Politecn Valencia, Inst Ingn Alimentos Desarrolla, Dept Tecnol Alimentos, Valencia, Spain..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Glycoscience.ORCID iD: 0000-0003-3572-7798
2019 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 214, p. 142-151Article in journal (Refereed) Published
Abstract [en]

This study explores the preparation of antioxidant starch food packaging materials by the incorporation of valuable phenolic compounds extracted from sunflower hulls, which are an abundant by-product from food industry. The phenolic compounds were extracted with aqueous methanol and embedded into starch films. Their effect on starch films was investigated in terms of antioxidant activity, optical, thermal, mechanical, barrier properties and changes in starch molecular structure. The starch molecular structure was affected during thermal processing resulting in a decrease in molar mass, smaller amylopectin molecules and shorter amylose branches. Already 1-2% of extracts were sufficient to produce starch films with high antioxidant capacity. Higher amounts (4-6%) of extract showed the highest antioxidant activity, the lowest oxygen permeability and high stiffness and poor extensibility. The phenolic extracts affected predominantly the mechanical properties, whereas other changes could mainly be correlated to the lower glycerol content which was partially substituted by the extract.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 214, p. 142-151
Keywords [en]
Renewable packaging, Physical properties, Antimicrobial activity, Molecular weight, DPPH, Chlorogenic acid
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-249838DOI: 10.1016/j.carbpol.2019.03.022ISI: 000462586900017Scopus ID: 2-s2.0-85062949959OAI: oai:DiVA.org:kth-249838DiVA, id: diva2:1307292
Note

QC 20190426

Available from: 2019-04-26 Created: 2019-04-26 Last updated: 2019-04-26Bibliographically approved

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Vilaplana, Francisco

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