title: Antioxidant capacity and light-aging study of HPMC films functionalized with natural plant extract.
abstract: The aims of this work were to functionalize edible hydroxypropyl methylcellulose (HPMC) films with natural coloring biomolecules having antioxidant capacity and to study their photo-aging stability in the films. HPMC films containing a natural red color compound (NRC) at the level of 1, 2, 3 or 4% (v/v) were prepared by a casting method. A slight degradation of films color was observed after 20 days of continuous light exposure. The antioxidant activity of NRC incorporated films was stable during different steps of film formation and 20 days of dark storage. On the other hand, antioxidant activity of samples stored under light was significantly affected after 20 days. FTIR (Fourier Transformed Infrared) spectroscopy was used to characterize the new phenolic polymeric structures and to study the photo-degradation of films. The results showed a good polymerization phenomenon between NRC and HPMC in polymer matrix giving a natural color to the films. NRC showed an ability to protect pure HPMC films against photo-degradation. This phenomenon was directly proportional to the concentration of NRC.
authors.affiliation: Université de Lorraine, ENSAIA-INPL, Laboratoire d'Ingénierie des Biomolécules (LIBio), 2 avenue de la Forêt de Haye, 54505 Vandœuvre-lès-Nancy Cedex, France.
authors.forename: Muhammad Javeed
authors.initials: MJ
authors.lastname: Akhtar
authors.forename: Muriel
authors.initials: M
authors.lastname: Jacquot
authors.forename: Jordane
authors.initials: J
authors.lastname: Jasniewski
authors.forename: Charlotte
authors.initials: C
authors.lastname: Jacquot
authors.forename: Muhammad
authors.initials: M
authors.lastname: Imran
authors.forename: Majid
authors.initials: M
authors.lastname: Jamshidian
authors.forename: Cédric
authors.initials: C
authors.lastname: Paris
authors.forename: Stéphane
authors.initials: S
authors.lastname: Desobry
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D065347:Hypromellose Derivatives / Q000737:chemistry*; D008027:Light; D008567:Membranes, Artificial; D055668:Photochemical Processes; D010936:Plant Extracts / Q000737:chemistry*; D013997:Time Factors
chemical_list: D000975:Antioxidants; D008567:Membranes, Artificial; D010936:Plant Extracts; D065347:Hypromellose Derivatives