Hot Issues and Countermeasures in Composite Materials Industry
Looking into the development of the international composite materials industry, the common problems in the development of composite materials include: price, reliability, and recycling problems.
1, the price problem due to the high cost of raw materials for composite materials, the process is more complex, long construction period, continuous production is constrained, and therefore difficult to significantly reduce prices, which is to limit the development of composite materials, international issues.
2. Reliability problems Due to the short history of the use of composite materials, there are few practices accumulated in the process, and there are many factors that affect the reliability of composite materials, including design, raw materials, process parameter control, product reliability prediction and evaluation, etc. Therefore, its reliability is far. Far less mature than traditional materials.
3. Recycling of materials Due to the crisis of shortage of resources in the 21st century, environmental problems are becoming more and more serious. Among composite materials and wastes, organic-inorganic-metal materials are not easily separated, and thermoset matrix is ​​insoluble and infusible. Scrap and waste products are crushed. Fillers are the only way out at present, but there are economic problems.
The countermeasures for the problems existing in composite materials In the international community, there are the following countermeasures for the problems existing in the development of composite materials:
(1) Absorb some specific product markets with absolute advantages so that other materials cannot compete with them, such as medium and high-end sporting goods. With the progress of aging society and the improvement of the quality of life, the demand for recreational sports goods Will increase with the day. For example, carbon fiber fishing rod, which has a large share in carbon fiber products. However, composite materials must have great development, must enter the automotive, electronics, construction, textile, chemical, shipbuilding and other large areas of production. At the same time, we must develop and use composite materials technology to repair, reinforce and renovate existing buildings and structures (high-rise buildings, tunnels, culverts, dams, bridges, ancient buildings, and even wooden fishing boats, etc.) to form a new industrial sector.
(2) The advantage of being able to be molded in one piece and using shaped fabrics to make net shaped products.
(3) Research on cheap raw materials, including natural materials, industrial by-products, slag, wastes, etc. Manufacturing of low-grade performance composite materials, as a substitute material with large demand (such as on behalf of wood, on behalf of steel), while research and development efficiency, Simple process methods and continuous production process equipment reduce production costs.
(4) Research and development of functional composite materials and smart and smart composite materials. These composite materials have small output, high output value, and can fully utilize the designability and composite effects of composite materials to give play to the unique characteristics of composite materials.
(5) Strengthen research on practical reliability. Develop simple and effective detection and evaluation methods, make full use of computer and image display technology to simulate the degree of practical use of material reliability, and develop dynamic real-time monitoring.
(6) Explore new composite materials, such as in-situ synthesis (in situ growth) composites, nanocomposites, microscopic composites, etc., to solve the interface weak links existing in macrocomposites, and improve the toughening effect.
(7) Strengthen the research of optimization design, form a design expert system, and fully exert the composite effect.
(8) Development of thermoplastic composites. Continuous fiber reinforced PP (polypropylene), PA (polyamide), PC (polycarbonate), PEEK (polyetheretherketone), PES, PPS (polyphenylene ether) and other composite materials It has the same good comprehensive mechanical properties as the reinforced thermosetting matrix. At the same time, it has obvious advantages in material toughness, corrosion resistance, wear resistance, and temperature resistance. The process has good characteristics of secondary or multiple molding and easy recovery, so it has good properties. Prospects.
(9) Research on thermoplastic polymer matrix composites, polymer-based in-situ composites, particle-reinforced metal matrix composites, recovery, reprocessing, performance degradation rate of recycled composites, and improvement measures.
1, the price problem due to the high cost of raw materials for composite materials, the process is more complex, long construction period, continuous production is constrained, and therefore difficult to significantly reduce prices, which is to limit the development of composite materials, international issues.
2. Reliability problems Due to the short history of the use of composite materials, there are few practices accumulated in the process, and there are many factors that affect the reliability of composite materials, including design, raw materials, process parameter control, product reliability prediction and evaluation, etc. Therefore, its reliability is far. Far less mature than traditional materials.
3. Recycling of materials Due to the crisis of shortage of resources in the 21st century, environmental problems are becoming more and more serious. Among composite materials and wastes, organic-inorganic-metal materials are not easily separated, and thermoset matrix is ​​insoluble and infusible. Scrap and waste products are crushed. Fillers are the only way out at present, but there are economic problems.
The countermeasures for the problems existing in composite materials In the international community, there are the following countermeasures for the problems existing in the development of composite materials:
(1) Absorb some specific product markets with absolute advantages so that other materials cannot compete with them, such as medium and high-end sporting goods. With the progress of aging society and the improvement of the quality of life, the demand for recreational sports goods Will increase with the day. For example, carbon fiber fishing rod, which has a large share in carbon fiber products. However, composite materials must have great development, must enter the automotive, electronics, construction, textile, chemical, shipbuilding and other large areas of production. At the same time, we must develop and use composite materials technology to repair, reinforce and renovate existing buildings and structures (high-rise buildings, tunnels, culverts, dams, bridges, ancient buildings, and even wooden fishing boats, etc.) to form a new industrial sector.
(2) The advantage of being able to be molded in one piece and using shaped fabrics to make net shaped products.
(3) Research on cheap raw materials, including natural materials, industrial by-products, slag, wastes, etc. Manufacturing of low-grade performance composite materials, as a substitute material with large demand (such as on behalf of wood, on behalf of steel), while research and development efficiency, Simple process methods and continuous production process equipment reduce production costs.
(4) Research and development of functional composite materials and smart and smart composite materials. These composite materials have small output, high output value, and can fully utilize the designability and composite effects of composite materials to give play to the unique characteristics of composite materials.
(5) Strengthen research on practical reliability. Develop simple and effective detection and evaluation methods, make full use of computer and image display technology to simulate the degree of practical use of material reliability, and develop dynamic real-time monitoring.
(6) Explore new composite materials, such as in-situ synthesis (in situ growth) composites, nanocomposites, microscopic composites, etc., to solve the interface weak links existing in macrocomposites, and improve the toughening effect.
(7) Strengthen the research of optimization design, form a design expert system, and fully exert the composite effect.
(8) Development of thermoplastic composites. Continuous fiber reinforced PP (polypropylene), PA (polyamide), PC (polycarbonate), PEEK (polyetheretherketone), PES, PPS (polyphenylene ether) and other composite materials It has the same good comprehensive mechanical properties as the reinforced thermosetting matrix. At the same time, it has obvious advantages in material toughness, corrosion resistance, wear resistance, and temperature resistance. The process has good characteristics of secondary or multiple molding and easy recovery, so it has good properties. Prospects.
(9) Research on thermoplastic polymer matrix composites, polymer-based in-situ composites, particle-reinforced metal matrix composites, recovery, reprocessing, performance degradation rate of recycled composites, and improvement measures.