Development trend of the hottest polymer composite

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Development trend of polymer composites: industrialization, new type, functionalization

at present, polymer materials are in a critical period of transition from development and expansion to industrial maturity, and towards the middle and high-end of the industry. During the "13th five year plan" period, China's polymer materials will meet new challenges and opportunities. While developing rapidly, we should move towards the direction of composite and high-end, especially by promoting the development of technologies with independent intellectual property rights, and promoting the industrialization, new type and functionalization of high-end polymer composites

according to statistics, the average annual growth rate of the production capacity of engineering plastics, a typical representative of polymer materials, is 39.8%, of which the compound average annual growth rates of polycarbonate (PC) and polybutylene terephthalate (PBT) are 116.5% and 23.9% respectively. However, the production capacity, output and market share of domestic special engineering plastics are very small, because in the last century, special engineering plastics have been listed as strategic materials, and foreign countries have imposed embargoes on China

compared with traditional engineering plastics, high-end engineering plastics used in aerospace and other fields often use reinforcing agents to further enhance. The most commonly used reinforcing agents are glass fiber and carbon fiber. Due to the poor toughness of glass fiber, it can only strengthen the matrix material, and there are some disadvantages such as exposed glass fiber in products. Carbon fiber is the most widely used reinforcing material in aviation materials, which needs many processes such as fiber surface treatment and sizing. Domestic processes still cannot produce products with good quality. In addition, the production technology of domestic carbon fiber is still relatively backward, and the carbon fiber that can be used for composite reinforcement (generally requires more than T800) still needs to be imported, which is also one of the bottlenecks restricting the development of higher end engineering plastics in China. It can be seen that the industrialization of high-end polymer materials in China is imperative

The development of

graphene provides a new way for the development of high-end polymer composites. The preparation process of graphene polymer composites is relatively simple, the process is short and easy to realize, so the prospect is extremely broad. Since the separation of graphene from graphite in experiments in 2004, major developed countries have set off an upsurge of research on graphene. In January, 2013, the European Commission listed graphene as one of the "flagship projects of future emerging technologies", and provided 1billion euros within 10 years to raise graphene research to a strategic level. IBM, apple, Samsung and other giants have set up graphene theme groups as the core R & D materials for the flexibility and intelligence of future products. Fortunately, due to the early start of graphene research in China, the gap between China and developed countries is not very large

at present, the most important factor restricting the development of domestic graphene industry is the high production cost of graphene, because the production technology of high-end flake graphite, the raw material of graphene, is monopolized by foreign countries. Therefore, vigorously developing the graphene industry, thereby driving the development of the upstream graphite industry and realizing the localization of high-end graphite, has far-reaching strategic significance for promoting the development of science and technology and society in China

the state clearly listed new materials as an important strategic emerging industry in the 12th Five Year Plan, and the State guided the graphene industry to establish a strategic alliance for technological innovation in China's graphene industry. At the same time, private capital flows to graphene industry, and the framework of industry, University, research and application is basically formed. Therefore, China can develop and research graphene reinforced high-end engineering plastics and realize industrialization. Firstly, the basic theory of graphene polymer composites is studied to clarify the strengthening and toughening mechanism and interface properties. At the same time, according to the properties of composite materials, develop the applications of materials in different fields. Accelerate the industrialization of graphene polymer composites, and realize large-scale production on the basis of completing small-scale and pilot tests

at the same time, due to green environmental protection, non-toxic and harmless to human body, and significant modification effect, graphene can be used as a modification additive to prepare polymer functional materials, so as to change the current situation that the additives or additives used in polymer functional composites are often not friendly to the environment or toxic and side effects on human body. For example, conductive polymer materials, which are widely used at present, contain heavy metals, preservatives, tougheners, etc. these additives will do harm to human body. If the polymer conductive functional materials can be prepared by combining the excellent conductivity of graphene, it will not only reduce the pollution to the environment, but also reduce the harm to human health when the pendulum completes one impact and hangs on the bolt. The robot industry is developing healthily and rapidly. Therefore, during the "13th five year plan", we can develop high-end polymer composites by combining the special optical, electrical and thermodynamic properties of graphene. At the same time, the development of polymer materials needs to adhere to the following principles:

first, adhere to innovation driven development, accelerate the construction of an innovation system based on industry, University and research, with industrialization as the goal and enterprises as the main body, and develop in the direction of "functionalization, ecology and high-end" high technology. Second, adhere to independent innovation and form new technologies for high-end polymer composites with independent intellectual property rights. At the same time, we should give priority to improving performance and reducing costs, further improve the efficiency of factor allocation and factor quality, and comprehensively improve total factor productivity. Third, adhere to personalization, small batch, "private customization", and promote the rapid growth of new production models and emerging business forms. Fourth, adhere to overall planning and coordination, plan and develop the comprehensive resource market and regional advantages, promote the orderly and systematic development of the industry, and further optimize the regional layout of the industry

in short, under the new normal, when planning the 13th five year plan, we must focus on the major needs of national economic and social development, focus on accelerating the transformation and upgrading of high-end polymer composites, focus on improving the independent innovation ability of polymer materials, and focus on new materials, new technologies, new equipment and new products, vigorously implement the catch-up strategy of polymer materials, and strive to narrow the gap with developed countries, Vigorously implement the high-end strategy and comprehensively improve the quality of the polymer material industry. At the same time, we should speed up the construction of the innovation system, vigorously promote the deep integration of compounding and high-end, and strive to make new breakthroughs in intelligent manufacturing, digital manufacturing and network manufacturing, so as to lay a solid foundation for polymer composites to enter the ranks of advanced countries in the world

Author: Zhu Shenmin, deputy dean of the school of shock specifications for different absorptive capacities in materials science and engineering, Shanghai Jiaotong University

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