期刊
CARBOHYDRATE POLYMERS
卷 255, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.117526
关键词
Polysaccharide; Gel-like products; Rheology; Semisolid materials; Food coloring
资金
- CAPES [001]
- CNPq [PDJ -156047/2018-7]
- FAPEMIG
A method to improve the elasticity of hydrogels and slow down the release of dyes was developed by partially replacing the gelling agent with chitosan.
Biopolymers mixtures appear as a strategy to improve sensorial/technological characteristics of gel-like products. Thus, self-sustaining starch (S100/C0) hydrogels were prepared with a partial replacement of the gelling agent by 5.0 % (S95/C5), 7.5 % (S92.5/C7.5), or 10.0 % chitosan (S90/C10), and containing yellow sunset (INS 110). Major visual changes or significant differences on L*a*b* parameters were not observed for starch/chitosan hydrogels. Creep-recovery data was modeled using the simulated annealing algorithm, and relative recovery results showed an increase for S95/C5 (82.6 %), when compared to S100/C0 (72.9 %). After 312 h, chitosan strongly reduced the INS 110 release from hydrogels to an ethanolic solution (3.1.10(-4) and 4.1.10(-3) g/100 mL for S95/C5 and S100/C0, respectively) or to a sucrose solution (1.1.10(-3) and 6.5.10(-3) g/100 mL for S95/C5 and S100/C0, respectively). Such results highlighted that chitosan not only presented a techno-functionality on starch hydrogels by improving their elasticity but also by hindering the release of yellow sunset.
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