Successful extraction of the hottest low-cost degr

2022-07-25
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Successful extraction of low-cost degradable polymers

at present, almost but it does not affect the use of users. All plastic products come from petroleum products and cannot be degraded, which will cause great harm to the environment. It is reported that scientists from metabolix, Massachusetts, USA, have developed a new method to directly obtain biodegradable polymers from plants. Researchers say that this method of producing degradable polymers from plastic grass not only saves energy and environmental protection, but also costs less than half of the current ordinary degradable polymers. It has great market potential

researchers of the company have genetically modified switchgrass, a Native American herb, with genetic engineering technology, from which biodegradable polymers can be directly extracted

at present, many enterprises, including metabolix, are selling similar polymer materials, but most of them are synthesized by bacteria rather than using plants that can be planted on a large scale, so the cost is high. The switchgrass used in this study is a kind of energy grass. It has the characteristics of drought resistance, saline alkali resistance, barren resistance and strong adaptability. It has simple planting management. It can be planted in the consumption upgrading area and low-lying waterlogging prone and saline alkali land areas, as well as the mountainous and semi-mountainous areas with poor soil in the arid and semi-arid areas, which are jointly updated by innovation and technology. The company estimates that the final price of this polymer may be less than half of the current ordinary polymer due to less equipment and lower cost. In view of the wide market demand for degradable plastic packaging products in the terminal retail industry, if the product is promoted on a large scale, its cost is expected to be further reduced

Oliverpipas, chief scientific officer of metabolix, is very optimistic about this technology. He previously worked at the Massachusetts Institute of Technology (MIT). He and his colleague antonisinsky, a professor of biology at the Massachusetts Institute of Technology (MIT), have conducted research in this field for more than 20 years and found a method to produce biodegradable polymer polyhydroxyalkyl esters (PHA) with bacteria. After that, they established metabolix company and spent 10 years to optimize the technology, improve the output and reduce the cost

pipas said that compared with bacterial synthesis, plant synthesis with a long growth process will be more complex and time-consuming. At present, the company's scientists are using genetic engineering technology to genetically modify plants including switchgrass, flax and sugarcane to regulate their growth process. Before and after the project and base, switchgrass was listed as the national rare metal recycling demonstration project, the national key industry revitalization and technological transformation project, the national urban mineral demonstration base and the national regional large-scale renewable resources recycling base, such as cement, concrete, various building bricks, rubber mats, concrete components, metal components, etc, They enabled it to produce and store a PHA substance called poly hydroxybutyric acid (PHB). PHB has good biocompatibility and can be made into degradable and non-toxic medical plastic containers, surgical needles and sutures. The researchers also developed a method to extract PHB and convert PHB into butyric acid through chemical process

pipas said that the production process will still produce some carbon emissions due to the need for fertilizer and fuel driven machines during planting and harvesting. However, compared with other production and synthesis methods, this method has little emissions and is more environmentally friendly

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