The hottest new organic catalyst for the low-cost

2022-08-18
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A new way of organic catalysis for low-cost and efficient manufacture of biodegradable plastics

Plastics is one of the greatest after-sales inventions of the 20th century, but ordinary plastics are difficult to degrade under natural conditions, resulting in high environmental costs. Stanford University and International Business Machine Corporation of the United States have opened up a new way of organic catalysis for the efficient manufacture of biodegradable plastics with a low-cost export of more than 100 million tons. Relevant research results have been published. A series of dynamometers with clamps have been added to measure the size of the force, and a list of materials that can be used for 3D printing has been published in the new issue of the British journal Nature chemistry

unlike conventional plastics made from petroleum, degradable plastics do little damage to the environment. The preparation of this kind of plastic requires the help of catalysts to improve the conversion rate of chemical reaction, but the existing catalysts have metal bases, which are difficult to degrade in the natural environment, and difficult to remove from the final product, or the removal cost is high

the researchers said that the new catalyst they developed uses common organic compounds as raw materials, namely thiourea and a metal alkoxide. The preparation process is relatively simple and easy to use. The properties can be adjusted according to the needs of the product, and it is suitable for the production of degradable polyester and polycarbonate. While accelerating the chemical reaction, this catalyst is selective to the catalysis, that is, it will not change the shape and characteristics of the plastic

Robert Weymouth, a professor of chemistry at Stanford University, said, "many catalysts have either accelerating or selective catalysis, and these (New) catalysts have both."

new catalysts focus on reducing economic costs and environmental hazards, and can be used to produce polyester and polycarbonate materials, including biodegradable polylactic acid. Polylactic acid (PLA) is a new biodegradable material, which can be used in the production of disposable tableware, food packaging and other daily necessities. It can also be used in medical applications such as absorbable sutures, in vivo implants and fixed stents

according to the researchers, although this research has gone through 10 years, it is still only the beginning. Relevant technologies may lead to the birth of a variety of new catalysts in the future, and thus produce a variety of new degradable plastic materials

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