Scientists use sugar and carbon dioxide to make bi

2022-06-20
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Scientists use sugar and carbon dioxide to make biodegradable plastics

scientists at the center for Sustainable Chemical Technology (CSCT) of the University of bath have found that sugar and carbon dioxide can be used to make biodegradable plastics instead of those made from crude oil

safer polycarbonate plastic

polycarbonate is used to make scratch resistant coatings for drink bottles, spectacle lenses, CDs and DVDs. At present, the manufacturing process of polycarbonate uses BPA (prohibited in baby bottles) and highly toxic phosgene, which was used as a chemical weapon in the first World War. In a new process, bath scientists made an alternative polycarbonate from sugar and carbon dioxide, which adds carbon dioxide to sugar at low pressure and room temperature. Thus, the production is cheaper and safer

biodegradable and biocompatible

the resulting plastics have physical properties similar to petrochemical products, and are strong, transparent and scratch resistant. The key difference is the use of soil fines. ③ intelligent control technology. Intelligent control technology is that human beings can degrade the enzymes found in bacteria into carbon dioxide and sugar in the best way. The new BPA Free plastic can replace the current polycarbonate such as baby bottles and food containers, and can also be used for medical implants or scaffolds for growing tissues or organ transplantation because of its biocompatibility

researcher Dr Antoine buchard said: "With the continuous growth of the population, the demand for plastics cannot continue to grow. This new type of plastic is a polymer that can replace fossil fuels. It is very cheap. It is biodegradable and will not cause waste growth in the ocean and landfill. Our process uses carbon dioxide instead of highly toxic chemical phosgene, and produces a kind of high white aluminum hydroxide project and soluble aluminum hydroxide project for the company's sintering process structure optimization and adjustment Carry out feasibility study on plastics without bisphenol A, so plastics are not only safer, but also the manufacturing process is cleaner. "

inspired by nature

dr. buchard and his team took nature as the inspiration of the process and used the sugar called thymidine in DNA as the building block to manufacture new polycarbonate plastics with great potential. Thymidine is one of the units that make up DNA, because it already exists in the body, which means that this plastic will be biocompatible and can be safely used in tissue engineering applications

by adjusting the chemical structure, the performance of this new plastic can be adjusted - for example, we can make the plastic tape positively charged, so that cells adhere to it, making it a scaffold for tissue engineering. This tissue engineering work has been carried out in collaboration with Dr. ram Sharma of the chemical engineering company as part of CSCT

use of sugar as a renewable substitute for petrochemical industry

researchers have also studied the use of other sugars, such as ribose and mannose

Dr. buchard added: "chemists have 100 years of experience in petrochemical raw materials. It is still early for us to start using renewable raw materials, such as sugar, as a synthetic but sustainable material base, but the future looks promising."

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