Smart material ‘squid teeth’ a potential plastic alternate

A newly-discovered material made from squid teeth could one day replace man-made plastic fibres like nylon and polyester, according to a review by scientists.

Smart material'squid teeth' a potential plastic alternateThis would help to reduce microplastic pollution in the oceans, as well as paving the way for new possibilities such as self-repairing safety clothing, or garments with built-in, flexible screens.

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The smart materials in question are made from a material found in the suckers on a squid’s tentacles. In some species, these suckers have a ring of ‘teeth’ to help the squid grip onto a surface. These are known as SRTs – squid ring teeth and it’s the proteins they’re made of that have scientists excited.

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“Nature produces a variety of smart materials capable of environmental sensing, self-healing and exceptional mechanical function,” said Melik Demirel, director of Penn State’s Center for Research on Advanced Fiber Technologies, who led the research.

 

Best of all, there’s no cruelty to animals involved, either – the SRT proteins can be grown in a lab, using genetically modified E.coli bacteria, without needing to trouble the already dwindling squid population.

Indeed, it’s far more efficient to grow them from scratch than it would be to ‘harvest’ them from nature.

“We don’t want to deplete natural squid resources, and hence we produce these proteins in genetically modified bacteria. The process is based on fermentation and uses sugar, water and oxygen to produce biopolymers,” Demirel explains.

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“Scaling up these materials requires additional work,” he continues. “We are now working on the processing technology of these materials so that we can make them available in industrial manufacturing processes.”

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