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How does carbon fiber recycling increase efficiency and reduce cost
- Categories:Carbon Fiber News
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- Time of issue:2021-03-29 11:11
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(Summary description)Carbon fiber is a kind of material with high strength, light weight, corrosion resistance and good energy absorption effect with more than 90% carbon content. It can replace many traditional materials and has epoch-changing significance for automobile lightweight. However, the high price makes car companies and consumers prohibitions.In recent years, the cost has been reduced slightly to civilian use. At present, the price of 200 to 250 yuan per kilogram is still far higher than the traditional material, making many car companies in the use of carbon fiber when the problem.
How does carbon fiber recycling increase efficiency and reduce cost
(Summary description)Carbon fiber is a kind of material with high strength, light weight, corrosion resistance and good energy absorption effect with more than 90% carbon content. It can replace many traditional materials and has epoch-changing significance for automobile lightweight. However, the high price makes car companies and consumers prohibitions.In recent years, the cost has been reduced slightly to civilian use. At present, the price of 200 to 250 yuan per kilogram is still far higher than the traditional material, making many car companies in the use of carbon fiber when the problem.
- Categories:Carbon Fiber News
- Author:
- Origin:
- Time of issue:2021-03-29 11:11
- Views:
Information
Carbon fiber is a kind of material with high strength, light weight, corrosion resistance and good energy absorption effect with more than 90% carbon content. It can replace many traditional materials and has epoch-changing significance for automobile lightweight. However, the high price makes car companies and consumers prohibitions.In recent years, the cost has been reduced slightly to civilian use. At present, the price of 200 to 250 yuan per kilogram is still far higher than the traditional material, making many car companies in the use of carbon fiber when the problem.
Current situation of carbon fiber use in automobile industry
In other industries, including automobiles, demand for carbon fiber has grown rapidly in recent years and is expected to grow to 140,000 tons a year by 2020. Carbon fiber has a service life of 15 years in the motor vehicle industry, 20 to 25 years in the aviation industry, and the carbon fiber of the aircraft fuselage accounts for 40% of the total. Therefore, in the next 10 to 20 years, there will be a large amount of carbon fiber material to be recycled in the market. In October, a guide to the development of key generic technologies in the industry was released, which includes references to the recycling of carbon fiber composites.
Nowadays, in addition to BMW I3, carbon fiber composite materials account for 50%, most fuel vehicles still use steel or alloy body. New energy vehicles used to use all-aluminum body and carbon fiber body. With the improvement of power, steel and alloy are also used to cut costs, such as Tesla Model S, which adopts all-aluminum body. Now the new Model 3 has been replaced with a steel and aluminum hybrid body, and BMW I3 will be replaced with a steel, aluminum and carbon hybrid body. Domestic new energy vehicles are more small cars, which mostly adopt low-cost all-aluminum frame. The overall automobile industry has a low utilization rate of carbon fiber, which makes it difficult to achieve extreme lightweighting.
Efficient recycling still faces technical difficulties
Thermosetting polymers can't be directly heated and molded, and the recycled materials are often laced with contaminants, such as metal and plastic debris. If current recycling technologies are to move out of the laboratory and into industrial production, the cost will have to be addressed. Professor Meng Fanran from the University of Nottingham presented their experimental results at the Automotive Materials International Forum 2018.
The carbon fiber recycling process is mainly divided into three kinds, mechanical method, chemical method and pyrolysis method, the mechanical recovery method does not apply to cars with carbon fiber composite material recycling, and chemical recovery is still confined to the laboratory stage, industrialized production and large gap, therefore the pyrolysis is currently the only realize industrialized production of carbon fiber composite material recycling technology.
The carbon fiber recycling process is mainly divided into three kinds, mechanical method, chemical method and pyrolysis method, the mechanical recovery method does not apply to cars with carbon fiber composite material recycling, and chemical recovery is still confined to the laboratory stage, industrialized production and large gap, therefore the pyrolysis is currently the only realize industrialized production of carbon fiber composite material recycling technology.
The experiment uses a fluidized bed recovery process from pyrolysis. First, waste is loaded into a fluidized bed. The fluidized bed is heated at a temperature of more than 500 degrees. The carbon fiber is then collected through a recycling process that recycles the remaining flue gas and recycles the carbon fiber from the waste, effectively separating pollutants from the carbon fiber, including impurities. And the use of waste gas circulation to reduce the energy consumption of the whole process, to achieve the energy return, has a good market prospect.
But recycling of carbon fiber and traditional material is different, cannot be directly used in the manufacture of the final product should be recycled carbon fiber to the middle of the processing, including the distribution of fiber, suspension, thermal drying process, finally will also need to get carbon fiber, using rotating, rotating band can be correction and the direction of the fiber is unified, Finally, the carbon fiber materials are adjusted and arranged to form high strength carbon fiber composites.
From the decomposition of recycled materials to the production of subsequent compounds and motor vehicle parts, a number of variables affect the cost of recycling, including the speed and quality of the waste material. Energy consumption is significantly reduced when the material is delivered faster.
At the same time, if the whole life cycle of recycled carbon fiber production of vehicle fuel economy range from 20% to 60%, the recycled compound can reduce greenhouse gas emissions, after the arrangement can bring higher strength, the performance of recycled carbon fiber compared to traditional materials, still have obvious advantages.
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