In the current booming development of the new materials field, carbon fiber and composite materials, with their superior performance, have become a key force driving progress across various industries. To enhance the professional competence of its employees, Jiangshan Fiber Technology Co., Ltd. invited Dr. Zhao Wei, a leading expert in the industry, to conduct a highly informative training session on carbon fiber and composite materials. Dr. Zhao Wei meticulously prepared the training, focusing on empowering employees and aiming to solidify the team's professional foundation through this knowledge-rich event, helping the company gain a competitive edge in the carbon fiber industry.
At the beginning of the training, Dr. Zhao Wei explained the basics of carbon fiber in a simple and easy-to-understand way. He mentioned, "Carbon fiber is a high-strength, high-modulus fiber with a carbon content of over 90%. Its density is less than 1/4 that of steel, but its tensile strength is 7-9 times that of steel, and its modulus is also higher than that of steel." By comparing the properties of common materials, the employees quickly gained an understanding of the unique advantages of carbon fiber.
Dr. Zhao Wei then outlined the development of carbon fiber: In the 19th century, Swan in Britain experimented with carbon filaments, and Edison in the United States used carbonized fibers as filaments, forming its prototype. Later, due to performance limitations, it was replaced by tungsten filaments. In the 1950s, driven by the needs of aerospace and military industries, the United States researched viscose-based carbon fiber for aerospace components. In 1959, Akio Kondo in Japan invented polyacrylonitrile-based carbon fiber, and in 1963, James Watt in Britain improved its process, promoting the rapid development of PAN-based carbon fiber. Subsequently, carbon fiber technology underwent iterative upgrades, and its applications expanded from aerospace and military to civilian fields, becoming an important industrial material.
Dr. Zhao Wei focused on analyzing the manufacturing process of polyacrylonitrile-based carbon fiber (PAN-based carbon fiber): using high-quality polyacrylonitrile (PAN) as raw material, fibers are produced through wet spinning, dry spinning, or dry-jet wet spinning processes; then, pre-oxidation is carried out under specific temperature and oxygen conditions to form a stable trapezoidal structure; then, carbonization is carried out at 1000℃-1500℃ to increase the carbon content to over 90%, obtaining high-strength, high-modulus fibers; some high-performance products will be further graphitized at 2000℃-3000℃ to optimize performance; finally, sizing treatment is used to enhance the bonding force with the matrix material. The process parameters at each stage are crucial to the quality of the finished product.
Besides carbon fiber itself, the molding process of carbon fiber composites is also crucial. Dr. Zhao Wei emphasized the autoclave molding process, which is commonly used in high-performance composite laminate structures for aerospace applications, such as aircraft doors and wings. The reinforcing material and resin are laid up according to the design, sealed in a vacuum bag, and placed in an autoclave. The finished product is obtained through heating, pressurization, and curing.
Through Dr. Zhao Wei's professional explanation, the employees of Jiangshan Fiber Technology gained a comprehensive and in-depth understanding of carbon fiber and composite materials.
This training not only enriched the company's knowledge base and helped improve the efficiency of daily work, but also strengthened the talent foundation for the company to cultivate the carbon fiber industry, injected development momentum, and helped it to open up broader space in market competition. It is believed that in the future, with the continuous progress and innovation of technology, carbon fiber will play an important role in more fields and make greater contributions to promoting social development.
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