Food packaging is poised to undergo a significant transformation toward circularity with the introduction of a new plastic film made from seaweed, developed by researchers at Aberystwyth University’s Institute of Biological, Environmental and Rural Sciences (IBERS).
As described in the journal Algal Research, this innovative solution utilizes alginate derived from seaweed, which can be fashioned into a biodegradable film that mimics the properties of traditional plastic, providing a viable substitute for conventional plastics that rely on fossil fuels.
The process involves blending alginate with various natural compounds to enhance its durability, flexibility, and resistance to moisture—crucial factors for effective food packaging. The alginate is converted into a powder, combined with water, heated, and then shaped into thin films using molds.
Initial trials indicate positive outcomes in terms of mechanical strength, antibacterial characteristics, and barrier effectiveness, positioning this material as an excellent option to replace single-use plastic films prevalent in sectors such as fresh produce, bakery items, chilled foods, and ready-to-eat meals.
Dr. Jessica Adams, the project leader, emphasizes the environmental benefits of this material. Films produced from alginate are entirely biodegradable, allowing them to decompose organically without contributing to microplastic pollution. This aspect enhances their appeal as a circular solution, particularly as the food industry faces increasing demands to mitigate plastic waste and adapt to stricter sustainability guidelines.
Manufacturers stand to gain more than just environmental advantages from these seaweed-based films. They offer:
– Enhanced environmental credentials, utilizing renewable, locally-sourced materials.
– Potential antibacterial properties, adding value for fresh and minimally processed food items.
– A clear, adaptable film that fits seamlessly into existing packaging processes.
– An important step towards less dependence on fossil-fuel-based plastics, which currently represent nearly one-third of the global plastic output.
Funded by BBSRC and food producer Samworth Brothers, this initiative underscores the industry’s growing interest in bio-derived packaging solutions that can be produced at scale. With approximately 15 billion kg of plastics entering marine ecosystems each year, the development of seaweed-based films marks a significant advancement towards more sustainable food packaging practices.
