IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
- Preparation of a milk spoilage indicator adsorbed to a modified propylene film as an attempt to build a smart packaging.
Autor/es:
JESICA CAVALLO; MIRIAM STRUMIA; CESAR GOMEZ
Revista:
JOURNAL OF FOOD ENGINEERING
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2014 p. 48 - 55
ISSN:
0260-8774
Resumen:
A colorimetric sensor of milk spoilage was built from adsorption of methylene blue (MB) onto a modified
polypropylene film (PP). First, acrylic acid (AA) was grafted onto PP surface by photograft polymerization
reaction, and then either MB or chitosan chains (Cs) was attached to polyacrylic acid (PAA). Three syntheses
were researched in order to fix MB to PP-g-PAA?Cs into different levels of PAA?Cs layers. The growth
of microorganisms and the generation of reducing substances take place during milk decomposition,
where MB is reduced to its colourless form. Binding stability of dye on the film and its redox activity were
confirmed by UV?vis spectrophotometry. Reduction kinetics of MB shows a response fast enough to work
as a spoilage indicator against samples of liquid milk in different preservation states. This performance
also describes these devices as suitable sensors to be used in the development of smart packagings.