Efekat ulja crnog kima na mehaničke i strukturne osobine jestivih filmova na bazi skroba

Abstract

Glavni cilj rada je ispitivanje strukture jestivih filmova na bazi skroba kojima je dodato etarsko ulje. Filmovi su dobijeni iz vodenog rastvora, koji sadrži skrob, poliol, guar-ksantan modifikovanu smešu i etarsko ulje, razlivanjem na Petri ploči. Etarsko ulje crnog kumina je dodato u tri različite koncentracije. Jestivi skrobni film kojem nije dodato esencijalno ulje je korišćen kao kontrola. Fizičke, mehaničke i strukturne osobine su određene: debljina, zatezna jačina, izduženje pri kidanju i struktura filma. FTIR rezultati su dokazali kvantitativnu zavisnost između dodate količine etarskog ulja i vrednosti apsorpcije spektara. Na osnovu ove zavisnosti izračunat je koeficijent korelacije (R2=0,99483).

The main goal in this work was to investigate the structure of starch based edible films with essential oil addition. Films were obtained from water solution containing starch, polyol, guar-xantan gum modified mixture and essential oil by casting it on a Petri dish. Black cumin essential oil was added in three different concentrations. Starch based edible film without essential oil was used as a control. Physical, mechanical and structural properties are determined: thickness, tensile strength, elongation at break and film structure. FTIR results pointed to quantitative law dependency between amount of essential oil and spectra absorption values. Based on dependency coefficient of correlation was calculated (R2=0.99483).