Carrot fiber (CF) composite films for antioxidant preservation: Particle size effect.

IDROVO ENCALADA A.M.; BASANTA M. F.; FISSORE E. N.; DE'NOBILI M. D.; ROJAS A. M.

CARBOHYDRATE POLYMERS

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 2016 vol. 136 p. 1041 - 1051

0144-8617

tThe effect of particle size (53, 105 and 210 m) of carrot fiber (CF) on their hydration properties andantioxidant capacity as well as on the performance of the CF-composite films developed with com-mercial low methoxyl pectin (LMP) was studied. It was determined that CF contained carotenoids andphenolics co-extracted with polysaccharides (80%), rich in pectins (15%). CF showed antioxidant activ-ity and produced homogeneous calcium?LMP-based composites. The 53-m-CF showed the lowesthydration capability and produced the least elastic and deformable composite film due probably to CFbridged by calcium-crosslinked LMP chains. Antioxidant activity associated to the loaded CF was foundin composites. When l-(+)-ascorbic acid (AA) was also loaded, its hydrolytic stability increased with thedecrease in CF-particle size, showing the lowest stability in the 0%-CF- and 210 m-CF-LMP films. Below≈250 m, the particle size determined the hydration properties of pectin-containing CF, affecting themicrostructure and water mobility in composites.