Effect of the storage relative humidity on the physicochemical properties of corn starch edible films obtained by a combination of extrusion process and casting technique

Abstract

Starch is one of the most used(Biodegradationpolysaccharidesmodelingtheofformulationsludge bioreactorsof Edibleof Filmstotal petroleum(EFs). Thishydrocarbonswork aimedweatheringto developinstarch-based soil EFs employing extrusion technology as a pre-treatment to casting technique and evaluate the storage relative humidity (RH) and sediments) effect to determine their possible application as food coating. Corn starch and a mixture of plasticizers (sorbitol and glycerol) were processed in a twin-screwS.A. Medina-Moreno,extruder. TheS.castingHuerta-Ochoa,techniqueC.A.wasLucho-Constantino,used for EFs formation.L. Aguilera-Vázquez,The EFs wereA. Jiménez-conditioned at different storage RH (53, 75,Gonzálezand 100%)y M. Gutiérrez-Rojas for ten weeks. The studied response variables were: puncture resistance (PR), puncture deformation (PD), water 259 vapor Crecimiento, permeability sobrevivencia (WVP), y water adaptación solubility de Bifidobacterium (WS), X-ray infantis diffraction a condiciones patterns, ácidas and relative crystallinity. EFs at 53 and 75% RH showed the most stable behavior in PR and PD. Concerning the barrier properties, it was found that EFs stored at 53% RH had the (Growth,lowest valuesurvivalof WVPand adaptationand XRDof patternsBifidobacteriumshowinginfantisthat storageacidictimeconditions)produces crystalline zones by the aging effect. Starch-based L. EFs Mayorga-Reyes, obtained by the P. combination Bustamante-Camilo, of extrusion-casting A. Gutiérrez-Nava, and stored E. Barranco-Florido at an RH of 53 y and A. Azaola-75% presented the best physicochemical properties. Hence, these EFs could be used as coatings of intermediate moisture foods.