Assoc Prof Thian Eng Han (left) and PhD student Ms Tan Yi Min have developed eco-friendly food packaging material. In this photo, they are holding up the chitosan-based GFSE composite film. Photo: Robin Choo
Food products that last longer in their packaging, with little, or no chemical preservatives needed — that is the promise of a breakthrough in packaging technology made by two National University of Singapore researchers.
Associate Professor Thian Eng San from the Department of Mechanical Engineering and Ms Tan Yi Min, a PhD student, have developed an environment-friendly food packaging material that slows down fungal and microbial growth, and is free of chemical additives.
Bread samples packaged with this composite film was found to last more than three times longer, compared with those in conventional synthetic packaging film, where visible mould appeared after three days.
With the composite film, mould growth started on the 10th day.
With this new material, there is no need to use silver ions to give it anti-microbial properties — as is the current practice on packaging films — since there is a small possibility of the silver leeching into the food, which can be harmful if accumulated in large amounts in the body.
Learn more: Longer shelf-life for food thanks to breakthrough in packaging tech
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