Indian Scientists develop smart Biopolymer than can detect Food Freshness

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A team of Indian scientists has developed a smart biodegradable biopolymer nano-composite film which can detect relative humidity in the packaged foods to know the level of food freshness. The research conducted by the scientists from the Institute of Advanced Study in Science and Technology (IASST), an autonomous institute of the Department of Science and Technology has been published in the International Journal of Biological Macromolecules.

According to the team head Prof. Devasish Chowdhury, Professor in the Physical Sciences Division, and his INSPIRE Senior Research Fellow (SRF) student Sazzadur Rahman, two biopolymers, Guar Gum (a variety of beans obtained from plant) and Alginate (obtained from brown algae), were blended with carbon dots (nanomaterial) to make a nanocomposite film that was successfully used to detect relative humidity.

"The invention can be used to the food business, which is in need of non-toxic, ecologically acceptable, low-cost packaging materials that can replace petroleum-based plastics.

Additionally, it requires intelligent and active packaging materials that can instantly detect and report food quality. Such intelligent and active packaging reacts to signals and engages with the surroundings of the food packaging industry.”

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