Japan actively develops biodegradable plastic tech

Japan is actively developing biodegradable plastic technology

Xinhua News Agency Tokyo review (Xinhua News Agency Zhang Kexi) in order to control pollution and protect the earth's environment, Japan is actively developing biological degradation. Next, let's introduce in detail the solution of pointer instability of hydraulic pointer tension machine and plastic manufacturing technology. Preparation technology of high temperature resistant and acid-base resistant ceramic membrane for biodegradable plastic sewage treatment and flue gas deep dedusting; Low resistance and high strength support preparation technology for high temperature filtration and purification; Preparation technology of ceramic materials with heavy metal ion adsorption function; Preparation technology of microporous and mesoporous ceramic materials; Preparation technology of porous ceramic carrier for non-toxic catalyst with high specific surface area for environmental protection; Preparation technology of replacement products of chrome containing refractories; Preparation technology of degradable ceramic fiber; Other environmentally friendly and environmentally friendly material preparation technologies with new mechanisms refer to the use of biological material production functions to produce biopolymer materials with excellent and specific properties. This kind of material can decompose automatically after use, or convert into water and carbon dioxide, or convert into organic fertilizer, so it is called "clean plastic". Biodegradable plastics can be produced by using biochemical synthesis technology with petroleum derivatives and various natural substances derived from crops as raw materials, and can also be manufactured by using biopolymers such as plant starch and cellulose. Japan has made continuous progress in the research and development of biodegradable plastic production technology. It is reported that the Japanese Institute of physics and chemistry developed biopolyester manufacturing technology in 1987. In 1993, the Institute isolated a special microorganism from the soil alone. Taking vegetable oil as a carbon source is mainly used to provide it with the movement of the beam of the experimental machine, and it will synthesize another kind of copolymerized polyester. The material morphology of these biopolyesters varies with the composition ratio of copolymers. They can form hard crystalline plastics or elastic plastics, which can be processed into tough silk and transparent and soft films. In addition, the Institute of physics and chemistry has also developed the technology of using cheap sugar to allow microorganisms to efficiently produce high-performance copolymerized polyester. At present, Japan has isolated more than 50 kinds of microorganisms that can decompose polymer plastics from various environments, and refined polyester hydrolase from 11 kinds of microorganisms. The Institute of physics and chemistry applied transgene to implant into an alkali producing bacterium and cultivated a transgene microorganism, which was provided with palm oil and olive oil as carbon sources. It can efficiently produce biopolyester polymerized from 3-hydroxybutyric acid and 3-hydroxycaproic acid. Japan is also studying the application of transgenic technology to implant the polymerase gene into plants, so that plants can efficiently use carbon dioxide and water to produce biopolyesters. This research has made some progress. Japan has also made great efforts to commercialize biodegradable plastics. In 1989, 48 enterprises formed the Biodegradable Plastics Research Association. In 1995, the Association put forward the goal of realizing the practicality of biodegradable plastics. So far, Mitsubishi resin, Mitsui chemical, Showa polymer, uniqika and other enterprises have successively produced polylactic acid resin technology, and some biodegradable plastic products such as ropes and food containers have reached the commercialization level. In addition, biodegradable plastics made from sweet potato and coconut shell have also achieved success in technology. Biodegradable plastics are mainly used in the following two aspects: first, products used in the natural environment, such as agricultural, forestry and fishery materials, civil construction materials, field tourism products, etc., are decomposed by environmental microorganisms after use; 2、 Food packaging containers, paper diapers and other sanitary supplies, plastic bags and cups and other daily necessities are decomposed together with domestic waste after composting. The annual output of biodegradable plastics in Japan is about 1000 tons a few days ago. Many enterprises are further enhancing their production capacity, and it is expected that the output will increase to 5000 tons in two years. Experts believe that in order to use biodegradable plastics as widely used materials, the following issues need to be solved: 1 Low cost, 2 High performance, 3 Controllable service life. Japan is very active in the development of biodegradable plastic technology. Some experts pointed out that with the breakthrough of a series of technical problems, Japan's plastic industry in the 21st century may transition from the era of using oil, coal and other resources to the era of "biochemical industry" using biochemical technology to produce plastics

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