IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Immobilization of Caffeic Acid on a Polypropylene Film:
Autor/es:
DARIO ARRUA; MIRIAM STRUMIA; MÓNICA NAZARENO
Revista:
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Editorial:
AMER CHEMICAL SOC
Referencias:
Año: 2010 vol. 58 p. 9228 - 9234
ISSN:
0021-8561
Resumen:
The immobilization of caffeic acid (CA) on a polypropylene (PP) film was successfully performed
through the covalent binding of the caffeoyl chloride on a modified polymeric surface of PP films
grafted with hydroxyethyl methacrylate as monomer (PP-g-HEMA). The different reaction steps
were monitored by FT-IR spectroscopy. The synthesized films were characterized by Folin-(CA) on a polypropylene (PP) film was successfully performed
through the covalent binding of the caffeoyl chloride on a modified polymeric surface of PP films
grafted with hydroxyethyl methacrylate as monomer (PP-g-HEMA). The different reaction steps
were monitored by FT-IR spectroscopy. The synthesized films were characterized by Folin-(PP-g-HEMA). The different reaction steps
were monitored by FT-IR spectroscopy. The synthesized films were characterized by Folin--
Ciocalteu method by measuring the available phenolic groups as caffeic acid equivalents linked
to the surface. The antioxidant efficiency of the modified polymers was evaluated by typical
spectrophometric methods, such as the bleaching of radicals DPPH and ABTSþ, and the inhibition
of the enzymatically induced coupled oxidation of linoleic acid and betacarotene. The available
phenolic groups on the modified film presented a good correlation with the antiradical activity toward
DPPH. Moreover, the polymer synthesized in this work showed a good protective activity against
ascorbic acid oxidation in real samples of orange juice. and ABTSþ, and the inhibition
of the enzymatically induced coupled oxidation of linoleic acid and betacarotene. The available
phenolic groups on the modified film presented a good correlation with the antiradical activity toward
DPPH. Moreover, the polymer synthesized in this work showed a good protective activity against
ascorbic acid oxidation in real samples of orange juice.. Moreover, the polymer synthesized in this work showed a good protective activity against
ascorbic acid oxidation in real samples of orange juice.