Researchers have converted sugars from food waste into natural plastic films that could one day replace petroleum-based packaging.
With global plastic production exceeding 400 million tonnes each year, a Monash University study has shown the potential of a new biodegradable plastic made by transforming food waste sugars into polyhydroxyalkanoates (PHA) biopolymers.
By using different bacterial strains and blending their polymers, the researchers created films that perform like conventional plastics and can be moulded into other shapes or solids.
The study, led by Edward Attenborough and Dr Leonie van ’t Hag from the Department of Chemical and Biological Engineering, outlines a method for designing bioplastics for temperature-sensitive packaging, medical films and other products, addressing the challenge of single-use plastic waste.
“This research demonstrates how food waste can be transformed into sustainable, compostable ultrathin films with tunable properties. The versatility of PHAs means we can reimagine materials we rely on every day without the environmental cost of conventional plastics,” said Attenborough.
“By tailoring these natural plastics for different uses, we’re opening the door to sustainable alternatives in packaging, especially where they can be composted along with food or agricultural waste.”
The team is working with industry partners including Enzide and Great Wrap through the ARC RECARB and VAP hubs to develop biodegradable packaging and medical solutions with potential commercial applications.
The study builds on earlier work that explored the use of these materials as sustainable drug delivery systems.