Abstract：
:This work investigated the impact of two homogenization treatments, High Shear (HS) and High Pressure (HP), on the structure and antioxidant activity of chitosan-lignin bio-composite films. Laser light scattering analysis revealed that smaller lignin particles were obtained after HP processing, around 0.6μm, compared to HS treatment, between 2.5 and 5μm. Moreover, these particles were more homogeneously distributed in the chitosan film matrix after HP process, while some aggregates remained after HS treatment, as highlighted by two-photon microscopy. The surface hydrophobicity of the composite films, as measured by water contact angle, increased after the two homogenization treatments. Finally, the antioxidant activity of the composite films was determined using the DPPH· assay. No significant difference in the radical scavenging activity was noticeable, neither after HS nor HP processing. However, a migration of lignin residues from the film to the extraction medium was noticed, particularly for HP process.
journal_name
Food Chemjournal_title
Food chemistryauthors
Crouvisier-Urion K,Lagorce-Tachon A,Lauquin C,Winckler P,Tongdeesoontorn W,Domenek S,Debeaufort F,Karbowiak Tdoi
10.1016/j.foodchem.2017.03.094subject
Has Abstractpub_date
2017-12-01 00:00:00pages
120-126eissn
0308-8146issn
1873-7072pii
S0308-8146(17)30477-6journal_volume
236pub_type
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