Advancements in Carbon Fiber Reinforced Polymer Matrix Composites

Read more about CFRP composites, which have gained rapid popularity because of their remarkable characteristics

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Introduction

Composites made of carbon fibre-reinforced polymer (CFRP) have quickly become popular due to their exceptional properties, such as high specific strength and rigidity. These composites have found extensive use in many fields for more than half a century, including aerospace, transportation, wind power, and many more besides. Demand for carbon fibres and composites, especially in the aerospace and sports sectors, was greatly affected by the COVID-19 pandemic. Carbon fibre reinforced polymer matrix composites were in high demand in the wind energy sector but had little impact on other industries, such as construction and the automotive industry. This exemplifies the wide variety of uses for CFRP composites.

Investigation of carbon fibre composites’ origins, evolution, and many uses is essential for a full grasp of the material. To take CFRP technology to the next level, it is necessary to investigate alternative materials and manufacturing processes while also solving problems associated with recycling and reusing.

Dr Jin Zhang of the University of New South Wales, Dr Gang Lin of ATA Carbon Fibre Technology Guangzhou Co. Ltd, Professor Uday Vaidya of the University of Tennessee, and Professor Hao Wang of the University of Southern Queensland recently published a paper in the peer-reviewed Journal Composites Part B that offered a comprehensive overview of the evolution, use, and development of carbon fibres and carbon fibre composites.

The writers gave a brief history beginning with the 1950s and 1960s when carbon fibres were inadvertently found during experiments. Toray Industries became interested in polyacrylonitrile (PAN) carbon fibre technology and formed business partnerships after focusing on increasing their carbon content. The carbon fibre composites market grew in the 1970s when sports equipment made of carbon fibre was first mass-produced. In the 1980s, carbon fibers found their way into airplane manufacture, with expanded production facilities. The 1990s showed a considerable surge in the utilisation of carbon fibre composites in aerospace applications. At the beginning of the 21st century, Boeing and Airbus started programs showcasing the advantages of carbon fibre in commercial aircraft, further propelling its utilization across various industries, including wind energy and automotive.

The authors also provided insights into the global development and production of carbon fibre reinforced polymer matrix composites. Since 2014, the demand for these composites has continually climbed, reaching around 181 kt in 2021 and is predicted to reach 281 kt by 2025. While the aerospace industry experienced a decline due to the COVID-19 pandemic, the wind energy industry accounted for a significant portion of consumption. The sports and leisure market remained stable, and the automotive industry showed an upward trend in the utilization of CFRP composites. China surpassed the United States in terms of consumption, while Europe also played a significant role. Filament winding and pultrusion emerged as dominant manufacturing techniques and top global producers of carbon fibre included Toray, SGL, Mitsubishi Liyang, Toho Tenax, and Hexcel.

The aerospace, wind energy, automotive, high-pressure gas storage, and recreation industries extensively utilize CFRP composites. These composites offer high strength-to-weight and stiffness-to-weight ratios, resulting in enhanced performance and reduced weight. Carbon fibre has found new life in a variety of contexts because of price reductions and technological developments; it is now used in wind turbine blades, lightweight automobiles, pressure vessels, and even sports gear. The efficiency, emission reduction capabilities, durability, and sustainability benefits of CFRP composites continue to drive their increasing demand.

The authors also emphasized the significance of novel developments in carbon fibre composites. One way to make carbon fibres at a reasonable price is to employ large tow PAN fibres. These are cheaper than regular PAN precursor fibres. Nevertheless, to improve their thermal behaviour and mechanical properties, these fibres must undergo mechanical and radiation treatments due to their reduced purity. In addition, carbon fibre composites made with thermoplastic matrices are becoming more popular since these materials are easy to manufacture, can be recycled, and make components that are both lightweight and impact-resistant. To enhance the interfacial bonding of thermoplastic matrices with carbon fibres, surface treatments are used. Continuous carbon fiber-reinforced thermoplastic matrix composites are now within reach, thanks to advancements in additive manufacturing processes like fused filament fabrication. To cut down on production costs and overcome size constraints, out-of-autoclave methods are being developed. These include automated dry fibre implantation and liquid moulding. These developments result in improved part quality, larger fibre volume fraction, and increased production speeds.

Dr Jin Zhang and colleagues also highlighted the importance of recycling and reusing carbon fibre composites to address the growing amount of waste generated during manufacturing and after end-of-life. Pyrolysis has emerged as an industrially viable method for reprocessing CFRP composites, allowing for the recovery of long carbon fibres and hydrocarbon streams. Several companies around the world have implemented pyrolysis recycling capabilities to tackle the issue of CFRP waste in the composite industry supply chain.

Conclusion

In conclusion, carbon fibre-reinforced polymer matrix composites possess outstanding properties such as high strength, high rigidity, low density, and ease of part integration making them highly valuable in industries such as aerospace, automotive, wind energy, and more. Despite the challenges faced during the COVID-19 pandemic, the demand for these composites continues to rise, driven by advancements in materials, production methods, and their positive environmental impact. The ongoing development of CFRP technology, including new materials, manufacturing processes, and recycling methods, holds immense promise for further expanding the applications and benefits of carbon fibre composites in various industries.Also learn about The Power of Fiber Reinforced Polymer