Rajshree Ghosh Biswas is a second year PhD student task with synthesizing small batches of the oil to try to convert it into high-quality resin. Andre Simpson had a problem. The University of Toronto's Scarborough campus was paying through the nose for a crucial material for its 3D printer. Few would have guessed McDonald's would come to the rescue.
Simpson had bought a 3D printer for the lab in 2017. He hoped to use it to build custom parts that kept organisms alive inside of the NMR spectrometer for his research. Simpson closely analyzed the resin and spotted a connection. The molecules making up the commercial plastic resin were similar to fats found in ordinary cooking oil.
Each time the resin was produced it was used to 3D print a butterfly. The breakthrough came in September. The experiment yielded a commercially viable resin that Simpson estimates could be sourced as cheaply as 30 cents a litre of waste oil. "The concept of sustainability has been underplayed in 3D printing," said Tim Greene, a research director for global research firm IDC who specializes in the 3D printing market. "The melted plastic currently being used as resin is not so great for the environment."
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