The use of biopolymers is gaining momentum owing to their compatibility with various food commodities and acceptability by the industry and consumers. Biopolymers integrated with natural pigments can be used for assessing the quality of perishable packaged food products. Here, a biodegradable composite membrane of starch and chitosan, integrated with anthocyanin has been developed. The chromogenic response of the developed biocomposite membrane was used to assess spoilage in milk. The surface roughness recorded using atomic force microscopy and scanning electron microscopy showed smooth membrane surface, and a pore size 4.21 nm was determined by Brunauer-Emmett-Teller analysis. The water vapour transmissibility of the membrane was 4.616E-09 and 1.147E-08 g/h Pa.mm and water solubility was 5.6 and 5.8 % at 25 and 37 ℃, respectively, indicating high water resistance and low vapour transmission rate. The developed biocomposite membrane offers an environment friendly substrate for biosensing with a promising potential in smart food-packaging applications.
Keywords: Anthocyanin; Biocomposite membrane; Biopolymers; Food packaging; Sensors.
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