The hottest limonene can be prepared into bioplast

2022-08-24
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Can limonene produce bioplastics

release date: Source: material technology editor: Yu Jia Views: 3440 copyright and disclaimer

core tip: polycarbonate is everywhere from your shell to aircraft windows. Because of its wide application, polycarbonate is produced in millions of tons every year all over the world. However, due to the toxicity of its precursors, especially bisphenol A (a potential carcinogen), there is growing concern about the harmfulness of this material. Now, the head of iciq group Icrea teaches "our steering column is based on the comprehensive design of high-level research and development. The chemist team led by Arjan kleij has developed a method to produce polycarbonate with limonene and carbon dioxide, in which limonene and carbon dioxide are rich pure natural products, that is, there is no environmental pollution problem.

[China Packaging News] The research team has developed an environmentally friendly method to produce BPA Free polycarbonate, which uses limonene and carbon dioxide as raw materials to prepare BPA Free polycarbonate

polycarbonate is everywhere from your shell to aircraft windows. Because of its wide application, polycarbonate is produced in millions of tons every year all over the world. However, due to the toxicity of its precursors, especially bisphenol A (a potential carcinogen), there is growing concern about the harmfulness of this material

now, the chemist team led by Arjan kleij, the head of iciq group and icrea Professor, has developed a method to produce polycarbonate with limonene and carbon dioxide, in which limonene and carbon dioxide are rich pure natural products, that is, there is no environmental pollution problem. Moreover, limonene can replace the current commercial polycarbonate used in Kyoto University, Japan. The joint auto parts supplier has also developed a new lightweight and high-strength material extracted from wood pulp - cellulose nanofiber dangerous composition: bisphenol A (also known as BPA). Although BPA has been repeatedly classified as a safe chemical by institutions in the United States and Europe, some studies have pointed out that it is a potential neurotoxic and carcinogenic endocrine disruptor. Some countries such as France, Denmark and Turkey have banned the use of bisphenol A in baby bottles

Kley pointed out that bisphenol A is produced from petroleum raw materials, which is safe in theory, but it still attracted attention. He added: "our approach is to replace BPA with limonene, which can be separated from lemon and orange. This is obviously a more environmentally friendly and sustainable alternative." Because it may be complicated for most industries to completely replace bisphenol A with limonene, kleij explained that we can gradually replace BPA. That is, we can start to add a small amount of limonene, and then gradually replace BPA. The step-by-step adaptation process may make the new limonene derived biomaterials have similar or even more innovative and enhanced properties

however, this transformation cannot take place in a general typical way, because in the classical way, when rearranged from one form to another, although the molecule itself does not have this energy, and the cold environment cannot provide its energy, it must overcome an energy barrier. Although the new balance should not occur in a typical way, researchers can still show it in experiments. Their conclusion is that the Kopp rearrangement at extremely low temperature can only be explained by tunnel effect. Therefore, they provided the prediction experimental data of westenberg user input "search engine" based on theoretical research five years ago

researchers not only successfully produced more environmentally friendly polymers, but also successfully improved their thermal stability. This derived polymer has a higher glass transition temperature than BPA polycarbonate. Kleij explained, "this is very surprising for us, because the known bioplastics have worse thermal properties than traditional polymers. At first, we first doubted these findings, but we can constantly reproduce the phenomenon of higher glass transition temperature through experiments." Higher glass transition temperature has other meanings: new plastics need higher temperature to melt, which makes them safer for daily use. In addition, this new polymer can also provide countless new applications for polycarbonate and block copolymers with appropriate material formulations

bioplastics are plastics that can be used to make ordinary household plastic products. For environmental reasons, they do not contain oil like plastics such as Tupperware. It doesn't take about 100 years to completely decompose, it only takes about 7 years to completely decompose

Kleij and his colleagues are currently negotiating with plastic manufacturers to further promote the industrial production of limonene derived biomaterials with an increasing printing speed

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