首页|Development of cinnamaldehyde/aminated gelatin film as pH-responsive controlled-release packaging for cherry preservation: Effects of CO_2 and humidity in the microenvironment
Development of cinnamaldehyde/aminated gelatin film as pH-responsive controlled-release packaging for cherry preservation: Effects of CO_2 and humidity in the microenvironment
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NETL
NSTL
Elsevier
pH-responsive materials control the release of active substances by responding to pH changes in the environment.In this study, based on the properties of imine bond with acid-sensitive hydrolysis and mild reactionconditions, cinnamaldehyde was immobilized onto aminated gelatin (AGel) films to generate cinnamaldehyde/aminated gelatin (Cin/AGel) films, which were then applied to preserve cherries. FTIR and XPS confirmed thesynthesis of imine bonds. The excellent pH-responsive controlled-release properties of Cin/AGel films weredemonstrated by monitoring changes in the cumulative release fraction of cinnamaldehyde in the aqueous phase(different pH buffers) and in atmospheric environments (different CO_2 concentrations and humidity). Even whennot in direct contact with the aqueous phase, it can nevertheless provide effective regulated release to theacidified environment caused by CO_2 accumulation and high humidity conditions. Furthermore, the Cin/AGelfilms had smart antibacterial properties. Compared to PE and AGel films, Cin/AGel film packaging increased theshelf life of cherries by 9 and 6 days at 4 ℃, respectively. As a result, the shown pH-responsive controlled-releasefilms have promising applications in controlling the release of antimicrobial agents during food preservation.
NETL
NSTL
Elsevier
