期刊
MEMBRANES
卷 11, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/membranes11050321
关键词
corn fiber; arabinoxylan; decolorization; biodegradable films; food packaging
类别
资金
- Associate Laboratory for Green Chemistry-LAQV from FCT/MCTES [UIDB/50006/2020, UIDP/50006/2020, UID/AGR/04129/2020]
- LEAF-Linking Landscape, Environment, Agriculture and Food fromFCT/MCTES [UIDB/50006/2020, UIDP/50006/2020, UID/AGR/04129/2020]
- iBETXplore, through the project entitled BioXOSAX, Characterization of xylo-oligosaccharides XOS and arabinoxylans AX: newbiopolymers from starch by-product for food and pharma applications
- SOCIEDADE PONTO VERDE-SOCIEDADE GESTORA DE RESIDUOS DE EMBALAGENS, S.A. through the project entitled Bioplastics and Edible, Vegan Films
- Fundação para a Ciência e a Tecnologia [UIDP/50006/2020, UIDB/50006/2020] Funding Source: FCT
In this study, a purified arabinoxylan extract from corn fiber was decolorized using hydrogen peroxide, resulting in light-yellow biodegradable films with potential applications in food packaging. Although the cross-linking reaction was not efficient, the films exhibited antioxidant activity and mechanical properties suitable for packaging low-water-content food products.
Corn fiber from the corn starch industry is a by-product produced in large quantity that is mainly used in animal feed formulations, though it is still rich in valuable components, such as arabinoxylans, with proven film-forming ability. During arabinoxylans' recovery under alkaline extraction, a dark-colored biopolymer fraction is obtained. In this work, a purified arabinoxylan extract from corn fiber with an intense brownish color was decolorized using hydrogen peroxide as the decolorizing agent. Biodegradable films prepared by casting the decolorized extract exhibited a light-yellow color, considered more appealing, envisaging their application in food packaging. Films were prepared with glycerol as plasticizer and citric acid as cross-linker. Although the cross-linking reaction was not effective, films presented antioxidant activity, a water vapor permeability similar to that of non-decolorized films, and other polysaccharides' and mechanical properties that enable their application as packaging materials of low-water-content food products.
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