Sammanfattning

This study demonstrates the potential of feruloylated arabinoxylan (AX) from wheat bran for the preparation of bioactive barrier films with antioxidant properties. We have comprehensively evaluated the influence of the structural features and chemical acetylation of feruloylated AX extracted by subcritical water on their film properties, in comparison with alkaline extracted AX and a reference wheat endosperm AX. The degree of substitution (DS) of AX had a large influence on film formation, higher DS yielded better thermal and mechanical properties. The barrier properties of AX films were significantly enhanced by external plasticization by sorbitol. Chemical acetylation significantly improved the thermal stability but not the mechanical or barrier properties of the films. The presence of bound ferulic acid in feruloylated AX films resulted in higher antioxidant activity compared to external addition of free ferulic acid, which demonstrates their potential use in active packaging applications for the preservation of oxygen-sensitive foodstuff.

Nyckelord

Arabinoxylan; Wheat bran; Subcritical water extraction; Ferulic acid; Acetylation; Barrier properties; Antioxidant activity

Publicerad i

Carbohydrate Polymers
2020, Volym: 250, artikelnummer: 116916
Utgivare: ELSEVIER SCI LTD

SLU författare

• Moriana, Rosana

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    
  • Kungliga Tekniska Högskolan (KTH)
  • RISE Research Institutes of Sweden

UKÄ forskningsämne

Polymerkemi


Publikationens identifierare

DOI: https://doi.org/10.1016/j.carbpol.2020.116916

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/108632