socalfunplaces Chapter 314 Carbon Fiber
Chapter 314 Carbon Fiber
Li Yang plunged into the library, searching for all information related to carbon fiber, from monographs to journals, from internal documents to archival materials. He read almost all the documents he could find.
Gradually, key words emerged before his eyes:
"PAN-based carbon fiber", "high modulus and high strength", "oxidation pretreatment", "carbonization", "surface treatment"......
These obscure terms may seem like a mystery to ordinary people, but they suddenly become clear to Li Yang!
[Ding, the carbon fiber preparation process has been mastered, and the material engineer skill has been activated! Current level: elementary! Please keep up the good work and strive to upgrade!?1?8]
Seeing the system prompt, Li Yang couldn't help but smile.
Once upon a time, he never dared to dream that one day he would be able to touch such cutting-edge materials.
But now, with the help of the system and his own efforts, he has gained some insights into this field and has become a "newbie" materials engineer!
But he knows that this is just the beginning. He still has a long way to go to truly master the core technology of carbon fiber and apply it on a large scale.
So, in the following days, Li Yang devoted himself to the research of carbon fiber without sleep or food.
During the day, he stayed in the laboratory, doing hands-on experiments and repeatedly pondering the preparation process of composite materials.
At night, he worked furiously at his desk, writing various formulas, improving production processes, and optimizing process parameters.
Hard work pays off. After careful research, one carbon fiber preparation technology after another gradually appeared in front of Li Yang:
The first step is the selection of precursor. After repeated experiments and comparisons, Li Yang locked on PAN-based carbon fiber precursor.
Compared with viscose-based and asphalt-based fibers, PAN-based fibers have higher carbon content and orientation, and are more conducive to the preparation of high-performance carbon fibers.
In order to obtain high-strength and high-modulus PAN-based raw fibers, he selected high-molecular-weight, high-orientation acrylonitrile fibers, adopted a wet process for spinning, and then subjected them to multi-stage stretching and surface oxidation treatments to give the raw fibers more excellent mechanical properties.
有了高品质的PAN基原丝,李阳的碳纤维梦,才终于有了一个良好的开端。?1?8【叮,PAN基原丝制备工艺已掌握,材料工程师等级提升至2级!解锁碳化工艺】?1?8看到系统提示,李阳嘴角泛起一丝自信的微笑。
That’s right, the next carbonization process is the core of preparing carbon fiber!
The so-called carbonization is to decompose the organic matter in the PAN-based raw fiber under high temperature, vacuum or inert atmosphere conditions, so that non-carbon elements escape and carbon atoms rearrange, and finally obtain carbon fiber with a carbon content of more than 95%.
This process not only determines the microstructure and mechanical properties of carbon fiber, but also affects the carbon yield.
In order to achieve stable and controllable carbonization, it is necessary to accurately control multiple process parameters such as temperature, heating rate, residence time, etc., which undoubtedly puts extremely high demands on equipment and operation level!
To this end, Li Yang did not think much and immediately issued instructions: an elite carbon fiber R&D team must be established as soon as possible, gathering cutting-edge talents from all aspects to work together to overcome this problem!
With the strong support of Liu Ziliang and General Lin, a joint research team composed of talents from multiple disciplines such as materials, chemical engineering, machinery, and electronics was soon established in the New Materials Research Institute?
Everyone worked closely together, showing their expertise: material experts were responsible for optimizing the carbonization process, chemical experts were responsible for improving the raw silk preparation, mechanical experts were responsible for designing the carbonization furnace, and electronic experts were responsible for the temperature control system...
Under the leadership of Li Yang, the team worked at full capacity day and night.
After repeated experiments and continuous improvement, a set of advanced carbonization process flow gradually took shape:
The pre-oxidized raw fibers are first carbonized at 200-300°C to dehydrogenate and cyclize PAN and form a dense carbon layer on the fiber surface.
Then, carbonization is carried out at a high temperature of 800-1500°C to further increase the carbon content and crystallinity of the carbon fiber.
Finally, the carbon atoms are rearranged into graphite crystals at ultra-high temperature of 2000-3000℃, which greatly increases the modulus of carbon fiber.
At the same time, a set of matching carbonization equipment is also becoming more and more perfect: the highly intelligent temperature control system, precise and efficient air intake device, and perfect and reliable safety protection are all the result of the hard work of the research team.
[Ding, high temperature carbonization process has been mastered, material engineer level has been upgraded to level 3! Surface treatment technology has been unlocked!]
Another system reminder doubled Li Yang's confidence?1?8
He knew that he was getting closer and closer to his dream, closer and closer to the weight of "Yan Country Carbon Fiber"!
But he cannot slack off. On the road to carbon fiber's application, surface treatment will be an unavoidable hurdle.
Because carbon fiber is a material with low surface energy, stable chemical properties, and poor bonding with the matrix, the mechanical properties of the composite material will be greatly reduced without surface treatment.
To this end, Li Yang began to concentrate on studying various surface activation technologies.
Electrolytic oxidation, plasma treatment, vapor deposition coating... He and his team members carried out a large number of analytical tests and comparative experiments, and finally found the optimal surface modification solution.
First, the carbon fiber is chemically oxidized with nitric acid to introduce oxygen-containing functional groups on the surface to improve its activity;
After ammonia plasma treatment, a very thin nitride layer is formed on the surface, further enhancing its compatibility with matrix such as epoxy resin;
Finally, a layer of nano-SiC is coated, which not only improves the interface bonding strength, but also significantly improves the antioxidant properties of the composite material.
At this point, Li Yang has mastered a complete set of system solutions for carbon fiber preparation and composite.
The hard work over the past few days has finally paid off!
[Ding, the surface treatment process has been mastered, the material engineer has been promoted to intermediate level, and the expertise in composite material preparation has been unlocked!]
Seeing this prompt, Li Yang could no longer suppress his inner joy and jumped up. The dream of many years and the expectation of many generations are now finally within reach!
He could not wait any longer and immediately led his team members to start the pilot production in full swing.
The laboratory was bustling with activity: the silk-making machine roared, the carbonization furnace belched flames, the surface treatment tank was churning with oxidizing reagents, and busy figures were everywhere.
Hard work pays off. In just a few months, a batch of high-performance carbon fibers was produced by Li Yang and his team:
These hair-thin, black-as-paint carbon fibers have a diameter of only 5-7 microns, but a single-filament strength of 7 GPa and a modulus of 300 GPa.
Fully reach the international advanced level!
What is even more exciting is that in various mechanical tests such as stretching, bending, and compression, these domestically made carbon fibers have shown their kingly demeanor, with all performance being no less impressive, and some even surpassing similar imported products!
Li Yang held the bundles of carbon fiber in his hands, and his eyes became moist.
At this moment, he deeply felt a sincere pride: proud of the vigorous power of the new Yan country, proud of being born in such a great era!
How many predecessors have worked so hard and painstakingly to achieve today's achievements?
Standing on the shoulders of predecessors and taking over the baton of the times, it is his duty as Li Yang!
Thinking of this, Li Yang raised the design drawing in his hand, looked around at the team members, and said with high morale: "Brothers, it's time to speed up!
No, we must speed up the industrialization of domestic carbon fiber and apply this new material to the cutting-edge defense and civilian fields as soon as possible!" Everyone was excited when they heard this and nodded in agreement.
Li Yang continued: "I will go to Minister Liu and ask him to prepare the raw materials for large-scale production of carbon fiber, and also organize the experienced
Experienced scientific research and production backbones, quickly transform our technological achievements!"
After saying that, he waved his hand, and everyone rushed to the intense production preparations?1?8
Liu Ziliang was overjoyed upon hearing the news, and immediately convened a meeting of the relevant factory and mine leaders to start working on the supply of raw materials: "Xiao Li asked us to hurry up and prepare for the large-scale production of carbon fiber raw materials. This is a top priority and we cannot afford to be careless!
我们一定要全力配合,把国家的需求放在第一位,保证原料供应及时?1?8高质?1?8高效!"厂矿负责人一个个点头如捣蒜,信心满满地表示:"刘部长您尽管放心,原料供应我们包了!国之重器,我们在所不辞!"一时间,从油田?1?8矿山到化纤厂?1?8炼焦厂,一场声势浩大的碳纤维原料保障行动轰轰烈烈地展开?1?8而另一边,炎国的机械制造业,也沸腾了?1?8那些曾经的纺织设备厂?1?8化工机械厂,纷纷接到新的任务:要在最短的时间内,赶制出一批碳化
Furnace, wire drawing machine and other core equipment!
The former spinning workshop?1?8 chemical fiber workshop, in the blink of an eye, has become a manufacturing base for "black gold"?1?8
Strong men and skillful women workers, under the guidance of Li Yang's drawings, worked together and worked non-stop.
First, the accessories are processed according to the drawings, polished and assembled;
Then debug repeatedly and make continuous improvements;
From blueprint to product, from scratch, in just a few months, a set of brand new carbon fiber production lines stood in the workshop like magic?1?8
Li Yang personally took part in the process, guided the installation and commissioning, and optimized the production process?1?8
Hard work pays off. The domestic carbon fiber production line has finally been fully built and is running at full capacity day and night.
As truckloads of PAN raw yarns enter the factory, batches of carbon fiber products are produced. From 1 to 8, the grand blueprint of the "four modernizations" of the new Yan country's carbon fiber industry,
On this ancient hot land, it is becoming clearer and more perfect day by day!
Behind this is the hard work and sweat of countless people. It is the result of Li Yang leading a new generation of scientific and technological workers to work hard for the national rejuvenation.
Blood, the figure that motivates people to move forward!
Accompanied by the rumbling sound of machines, another batch of domestic carbon fiber products rolls off the production line?1?8 precision quality inspection instruments.
In Li Yang's office, another plan is being worked on: a grand blueprint for the popularization of carbon fiber in the national economy has been drawn up.