In the national long-term science and technology development program, green materials with environmental protection and health functions are a very important development area. According to this theme, the "Eleventh Five-Year Plan" national science and technology support plan key project will set "Key technologies for the industrialization of biodegradable plastics" as the priority theme of the manufacturing industry. The reporter learned from the Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences that led the research work of this project yesterday that the current biodegradable plastics project is undergoing project selection and approval, and will soon begin research.
Biodegradable plastics are new environmentally friendly materials that are completely degradable under composting conditions. In the key projects of the National Science and Technology Support Program, the key technologies for the continuous industrial production of three types of typical biodegradable plastics, such as carbon dioxide-based plastics, polylactic acid, and polyhydroxybutyrate with different temperature resistance properties, will be selected for research and development, and industrialization will be established. Demonstration of the production line and the formation of a complete set of technological packages for industrial production lines, promote the establishment of relevant national standards, and accelerate the large-scale application of biodegradable plastic products.
Fixing Carbon Dioxide as a Fully Degradable Plastic China is the second largest emitter of carbon dioxide in the United States after the United States. However, due to the current rapid economic development, it is still heavily dependent on fossil fuels, and reducing carbon dioxide emissions is relatively difficult. Therefore, how to make effective use of carbon dioxide has become an issue that has received increasing attention all over the world. Fixing carbon dioxide as a fully degradable plastic is an accepted and effective approach. However, due to high costs and the need for further improvements in processability, mechanics, and thermal properties, the technology has not been realized in large-scale industrialization worldwide.
The National Science and Technology Support Plan proposes that an efficient catalytic system for the co-polymerization of carbon dioxide and epoxides will be developed to solve mass transfer and heat transfer problems of bulk copolymerization and post-treatment processes and real-time modification of resins, and to break through the continuous industrialization of carbon dioxide resins. The key technology of production.
The project will mainly focus on the engineering technology of maintaining the catalytic activity of carbon dioxide-based plastics, continuous copolymerization process, and polymer post-treatment methods, and solve the key technical issues of mass transfer and heat transfer that CO2 copolymers are subjected to in large-scale industrial synthesis. In view of the narrow temperature-constrained weaknesses of carbon dioxide-propylene oxide plastics, the functionalized epoxide third monomer was introduced for chemical copolymerization and modification, and its use temperature range was expanded; a 10,000 tonne carbon dioxide-based plastics production line was established and put into production before 2010. Sales and the formation of a 50,000-ton production line process package.
Solving white pollution with “corn plastic†Today, fossil resources are increasingly depleted. The development and application of biological resources have been widely concerned and have driven the vigorous development of the biomass industry. This emerging industry is the use of renewable or recycled organic materials such as crops as raw materials to produce fuels, energy, and biomass materials through biochemical methods. Polylactic acid, known as "corn plastic," is now considered to be a popular alternative to conventional chemical plastics and to end white pollution.
In fact, the raw material of polylactic acid is not only corn, but many kinds of crops can extract lactic acid. Therefore, it is more appropriate to refer to polylactic acid as a biomass plastic.
The national major science and technology projects require the development of a catalytic system and a polymerization method for the preparation of poly(L-lactic acid), solving the structural control problems in the polymerization process, solving the mass transfer and heat transfer problems in the polymerization and post-treatment processes, and establishing continuous bulk polymerization. In the production line, a new one-step process for synthesizing polylactic acid was developed, and a real-time modification method for improving the thermodynamic properties of polylactic acid was proposed.
The topics include the research on the purification and purification processes of high-efficiency low-polylactic acid dehydration polycondensation and cracking catalysts and L-lactide, and the study of industrially feasible low-cost and high-purity L-lactide reaction conditions and process conditions; the research is technically and economically A practical and feasible polymerization process; a low-cost preparation technique for the development of high-purity lactic acid monomers; a study of the influence of the purity and polymerization conditions of lactic acid on the relative molecular mass and distribution of synthetic polylactic acid; and the key technical issues involved in one-step synthesis of polylactic acid; Research on polylactic acid forming and processing technology, the formation of key technologies for polylactic acid processing and products with independent intellectual property rights; the establishment of a 10,000-ton polylactic acid production line and the formation of a 50,000-ton polylactic acid production line process package.
Microorganisms produce high-performance plastic plant sugars, such as glucose, starch, etc. After bacterial fermentation, bacterial cells gradually accumulate polymers, and these cells are collected to obtain polymer products. Polyhydroxyalkanoates can be obtained by this microbial fermentation technique. This kind of biodegradable plastic has excellent processing performance and biocompatibility, and can be used to develop high-value-added products such as high-strength fibers, heat-sensitive adhesives, water emulsions, tissue engineering materials, etc., and can be widely used in automobile manufacturing and biomedical applications. And electronics and other fields. In the past, this material has been difficult to obtain due to its high price.
The National Science and Technology Support Program proposes to solve the problem of large-scale production of pervalerate and polyhydroxyvalerate, establish a continuous production line, and realize real-time toughening modification to meet the requirements of medical and food packaging barrier materials. The plan calls for research to improve fermentation efficiency, reduce fermentation costs, determine industrially efficient production processes, and study how to efficiently separate polymers using solid-liquid separation equipment suitable for large-scale industrial production to form a 1,500-ton polyhydroxybutyrate production line and 10,000 tons Level technology package.
In addition, this national science and technology support plan also proposes to break through key technologies for the production and application of 10,000-ton konjac glucomannan, establish a controllable degradation konjac glucomannan film production line and controllably degrade konjac glucomannan foam material. The production line forms key technologies with independent intellectual property rights.
As an environmentally-friendly basic raw material with a wide range of products, biodegradable plastics have been listed by the Ministry of Science and Technology as a key project in the National Science and Technology Support Plan for the “Eleventh Five-Year Planâ€, marking the integration of these two internationally popular research fields of pollutant emission reduction and oil replacement into traditional ones. Plastics manufacturing has become a major direction of the country’s science and technology strategy. Once a breakthrough has been made in the research of the project, it will surely make the development of China's plastics industry and related industries reach a new level.
Biodegradable plastics are new environmentally friendly materials that are completely degradable under composting conditions. In the key projects of the National Science and Technology Support Program, the key technologies for the continuous industrial production of three types of typical biodegradable plastics, such as carbon dioxide-based plastics, polylactic acid, and polyhydroxybutyrate with different temperature resistance properties, will be selected for research and development, and industrialization will be established. Demonstration of the production line and the formation of a complete set of technological packages for industrial production lines, promote the establishment of relevant national standards, and accelerate the large-scale application of biodegradable plastic products.
Fixing Carbon Dioxide as a Fully Degradable Plastic China is the second largest emitter of carbon dioxide in the United States after the United States. However, due to the current rapid economic development, it is still heavily dependent on fossil fuels, and reducing carbon dioxide emissions is relatively difficult. Therefore, how to make effective use of carbon dioxide has become an issue that has received increasing attention all over the world. Fixing carbon dioxide as a fully degradable plastic is an accepted and effective approach. However, due to high costs and the need for further improvements in processability, mechanics, and thermal properties, the technology has not been realized in large-scale industrialization worldwide.
The National Science and Technology Support Plan proposes that an efficient catalytic system for the co-polymerization of carbon dioxide and epoxides will be developed to solve mass transfer and heat transfer problems of bulk copolymerization and post-treatment processes and real-time modification of resins, and to break through the continuous industrialization of carbon dioxide resins. The key technology of production.
The project will mainly focus on the engineering technology of maintaining the catalytic activity of carbon dioxide-based plastics, continuous copolymerization process, and polymer post-treatment methods, and solve the key technical issues of mass transfer and heat transfer that CO2 copolymers are subjected to in large-scale industrial synthesis. In view of the narrow temperature-constrained weaknesses of carbon dioxide-propylene oxide plastics, the functionalized epoxide third monomer was introduced for chemical copolymerization and modification, and its use temperature range was expanded; a 10,000 tonne carbon dioxide-based plastics production line was established and put into production before 2010. Sales and the formation of a 50,000-ton production line process package.
Solving white pollution with “corn plastic†Today, fossil resources are increasingly depleted. The development and application of biological resources have been widely concerned and have driven the vigorous development of the biomass industry. This emerging industry is the use of renewable or recycled organic materials such as crops as raw materials to produce fuels, energy, and biomass materials through biochemical methods. Polylactic acid, known as "corn plastic," is now considered to be a popular alternative to conventional chemical plastics and to end white pollution.
In fact, the raw material of polylactic acid is not only corn, but many kinds of crops can extract lactic acid. Therefore, it is more appropriate to refer to polylactic acid as a biomass plastic.
The national major science and technology projects require the development of a catalytic system and a polymerization method for the preparation of poly(L-lactic acid), solving the structural control problems in the polymerization process, solving the mass transfer and heat transfer problems in the polymerization and post-treatment processes, and establishing continuous bulk polymerization. In the production line, a new one-step process for synthesizing polylactic acid was developed, and a real-time modification method for improving the thermodynamic properties of polylactic acid was proposed.
The topics include the research on the purification and purification processes of high-efficiency low-polylactic acid dehydration polycondensation and cracking catalysts and L-lactide, and the study of industrially feasible low-cost and high-purity L-lactide reaction conditions and process conditions; the research is technically and economically A practical and feasible polymerization process; a low-cost preparation technique for the development of high-purity lactic acid monomers; a study of the influence of the purity and polymerization conditions of lactic acid on the relative molecular mass and distribution of synthetic polylactic acid; and the key technical issues involved in one-step synthesis of polylactic acid; Research on polylactic acid forming and processing technology, the formation of key technologies for polylactic acid processing and products with independent intellectual property rights; the establishment of a 10,000-ton polylactic acid production line and the formation of a 50,000-ton polylactic acid production line process package.
Microorganisms produce high-performance plastic plant sugars, such as glucose, starch, etc. After bacterial fermentation, bacterial cells gradually accumulate polymers, and these cells are collected to obtain polymer products. Polyhydroxyalkanoates can be obtained by this microbial fermentation technique. This kind of biodegradable plastic has excellent processing performance and biocompatibility, and can be used to develop high-value-added products such as high-strength fibers, heat-sensitive adhesives, water emulsions, tissue engineering materials, etc., and can be widely used in automobile manufacturing and biomedical applications. And electronics and other fields. In the past, this material has been difficult to obtain due to its high price.
The National Science and Technology Support Program proposes to solve the problem of large-scale production of pervalerate and polyhydroxyvalerate, establish a continuous production line, and realize real-time toughening modification to meet the requirements of medical and food packaging barrier materials. The plan calls for research to improve fermentation efficiency, reduce fermentation costs, determine industrially efficient production processes, and study how to efficiently separate polymers using solid-liquid separation equipment suitable for large-scale industrial production to form a 1,500-ton polyhydroxybutyrate production line and 10,000 tons Level technology package.
In addition, this national science and technology support plan also proposes to break through key technologies for the production and application of 10,000-ton konjac glucomannan, establish a controllable degradation konjac glucomannan film production line and controllably degrade konjac glucomannan foam material. The production line forms key technologies with independent intellectual property rights.
As an environmentally-friendly basic raw material with a wide range of products, biodegradable plastics have been listed by the Ministry of Science and Technology as a key project in the National Science and Technology Support Plan for the “Eleventh Five-Year Planâ€, marking the integration of these two internationally popular research fields of pollutant emission reduction and oil replacement into traditional ones. Plastics manufacturing has become a major direction of the country’s science and technology strategy. Once a breakthrough has been made in the research of the project, it will surely make the development of China's plastics industry and related industries reach a new level.
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