New plastic made out of fish could be good for the environment

Lucy Hughes devised material as way of making use of industry waste

MarinaTex began as an investigation into ways of reducing fish waste, around 50 millions tonnes of which is produced globally each year. Photograph: Getty Images

MarinaTex began as an investigation into ways of reducing fish waste, around 50 millions tonnes of which is produced globally each year. Photograph: Getty Images

 

A young scientist has developed a compound she hopes will one day replace much single-use plastic – and its main ingredient is byproducts of the fishing industry.

Lucy Hughes created MarinaTex for her final year project in product design at the University of Sussex. It’s also edible and, she says, intended as an alternative to plastic typically used in bakery bags, sandwich packs and tissue boxes.

Her project began as an investigation into ways of reducing fish waste, around 50 millions tonnes of which is produced globally each year, the United Nations estimates.

“It was me trying to work out how I could use that waste stream and add value to that waste,” Ms Hughes told Reuters.

“When I felt the skins and the scales in my hands, I could see that there was potential locked up in it. It was so flexible, yet pliable and strong.”

Her subsequent research won her this year’s international James Dyson Award, funded by the eponymous British inventor whose bag-free vacuum cleaner also bears his name. She plans to use the £32,000 (€37,000) of prize money to further develop the product and build a strategy for mass production.

“Why do we need to have hundreds of man-made polymers when nature has so many already available?” she said.

The world produced about 242 million tonnes of plastic waste in 2016, according to the World Bank. The UN estimates about 100 million tonnes have been dumped in the oceans to date.

In August, tiny pieces of plastic known as microplastic were even found in ice cores drilled in the Arctic.

“It’s not necessarily plastic that’s the problem... It’s our overuse of, for example, single-use plastics that might be used for only 10 to 15 seconds before we then have to throw that away,” Ms Hughes said.

To create a strong and stable compound, she added the molecules chitosan from crustaceans and agar from red algae to her scales-and-skin mixture.

Several months of subsequent testing culminated in the production of a flexible translucent sheet that forms at temperatures below 100 degrees and which James Dyson concluded was stronger than its plastic alternative, low-density Polyethylene.

MarinaTex also biodegrades in four to six weeks in home compost and does not contaminate soil. Alternative bioplastic Polylactic Acid (PLA), also derived from renewable resources, must be composted industrially.

“Further research and development will ensure that MarinaTex evolves further, and I hope it becomes part of a global answer to the abundance of single use plastic waste,” Dyson said. – Reuters