Chapter 444: problem

"What is the problem? You are such a clever child, with such a strong ability, what other problems can be difficult for you?" Shi Changxu asked puzzled.
Tan Zhenhua looked at the old man's eyes and slowly uttered three words:
"carbon fiber."
Shi Changxu didn't show any surprise when he heard the words. He took a deep look at Tan Zhenhua and chuckled: "It seems that I didn't guess wrong. You want to use my old man's thing, it really is this thing."
Tan Zhenhua asked in amazement: "Master, did you guess it? How did you guess it?"
Shi Changxu smiled and said: "Because, in the story you just told, the quadrotor drone you invented used some raw materials or parts that we can't produce by ourselves. Two of them caused me. Note that one of them is the Z80 CPU, which obviously belongs to the category of semiconductor electronics, and the other thing that makes you worry about it is this carbon fiber labeled "T300". And I am engaged in materials, although From a professional point of view, it is more focused on the field of metal materials, but since it is in the field of materials science, I still have a bit of a say, so I have been thinking, this rich boy, is it possible that this is not for this " Carbon fiber "Well, hey, I didn't expect it to be my guess."
Tan Zhenhua said abruptly: "Unexpectedly, the elder teacher saw through my mind early in the morning. I am still hanging on my appetite. I am really ashamed."
Shi Changxu said: "It's normal for you to care about carbon fiber. Carbon fiber is a material that can only be used for your drones. It has a very important and irreplaceable role in the cutting-edge fields of aviation and aerospace. The applicable fields are also very wide, so ah, in fact, we have started research on this kind of materials very early in China."
"However, you should also know that China’s industrial base Zhenhua is really weak, and the number of people engaged in basic scientific research is even rarer. Coupled with the continuous blockade of us by the Western world since the founding of the People’s Republic of China, it has caused us to use such materials. At present, there is a big gap with the international advanced level, and there is a growing trend, and it is restricted by Batumi. It is very difficult to buy ready-made products. If you want to do it now, you are likely to face neither Ready-made technology does not have the dilemma of excellent talents, and the research of basic materials has always been a costly project with slow returns. So, Zhenhua, are you sure you want to do it?"
Tan Zhenhua replied categorically without even thinking about it: "Senior, I know all of what you said, so I have to do it. I can't let others get stuck in our necks forever!"
Shi Changxu nodded and said, "Very good, but, young man, don't slap your chest to show your determination. For me, let me tell you about the current development of carbon fiber in China. It's not too late for you to make a decision."
Tan Zhenhua made up his mind to engage in carbon fiber only because he knew that this industry is the lifeblood of basic defense science. Without the blessing of this material, both aviation and aerospace will face the threshold of being unable to cross.
But after all, he played electronics and radar in his previous life. He knew almost nothing about the material industry, let alone the current development of China. At this time, someone can tell him, and the person who tells it is this one. Big brother, of course he couldn't ask for it.
So he made a posture of listening attentively and began to listen to what Shi Changxu said.
"Speaking of carbon fiber, it is actually not a new thing. The earliest research and use of it by mankind dates back to 1860. At that time, the British chemist and physicist Sir Joseph Wilson Swan first invented the use of carbon. The semi-vacuum carbon filament electric lamp with the luminous body is the prototype of the incandescent lamp. Swann invented the incandescent lamp 20 years before Thomas Edison. However, because the vacuum technology was immature at that time, the lamp life was not long. With the advancement of vacuum technology, by the end of the 1970s, Swan improved his invention and obtained the patent for the incandescent lamp in 1878."
Hearing this, Tan Zhenhua couldn't help but interject: "It turns out that the incandescent lamp was invented by the British Sir Swann. I always thought it was invented by Edison of the United States. It seems that it has been written in elementary school textbooks."
Shi Changxu explained with a smile: "According to historical records, after Sir Swann invented the incandescent lamp and obtained a patent, Edison bought the patent in 1879 and put it here. On this basis, he further invented the "Incandescent Bulb Carbon Fiber Filament Manufacturing Technology" and obtained a U.S. patent. By the way, I still remember the patent number, it should be 470925. So, the contributions of these two people can be summarized as: Sir Wan invented the incandescent lamp, and Edison invented the first commercial carbon fiber and used it in the incandescent lamp."
Tan Zhenhua stuck out his tongue and smiled: "I was taught another lesson today. Thank you, Master, for correcting a wrong historical concept for me."
However, in his heart he respected this elder teacher more and more. At such an old age, he remembered these little things so clearly that he came with his mouth open. It was really comparable!
Shi Changxu smiled and said, "What I just said are just appetizing side dishes. Just listen to it as a story. The following is the real development of carbon fiber."
At this time, not only Tan Zhenhua listened more carefully, but even Guo Yicheng showed an expression of interest. Although he was engaged in magnetism, he was also involved in material science.
"This carbon fiber is truly valued by mankind and has begun to be vigorously developed. It will also start in the mid-1950s. At that time, the U.S. Air Force urgently needed to find more ablation-resistant materials to design and manufacture space shuttles to cope with the Soviet Union. Russia competes fiercely. After a series of studies, they finally discovered a material with a melting point of 3600°C and named it "carbon fiber."

At the same time, American William F. Abbott first invented a method to increase the strength of carbon fiber and obtained a patent authorization from the U.S. Patent Office in 1962. Since then, carbon fiber has re-entered people’s vision, but at that time, regardless of its preparation The craftsmanship and the intensity of use are only unsatisfactory."
"At this time, there are two people who have made important contributions to the development of carbon fiber, one of them is the Japanese native Akio Kondo, and the other is the British William Watt."
"Let’s talk about this Kondo Akio. He came to a conclusion in 1959 and applied for a patent for it. PAN precursor, also known as "polyacrylonitrile", is the best precursor for preparing carbon fiber. The strength and modulus of the carbon fiber are much higher than the viscose-based technology that the United States is currently vigorously developing."
"Furthermore, this William Watt, under the sponsorship of the "Royal British Aircraft Research Center" and the "British Atomic Energy Research Center", conducted a lot of experiments and used "polyacrylonitrile fiber" as raw material to prepare He produced a carbon fiber precursor with a modulus of 350-420 Gpa. His research results completely revealed all the process steps and processes of carbon fiber preparation. He also applied for and obtained a patent in 1968." "
"The next thing I want to talk about is of course the companies that have mastered the core technology of carbon fiber through various cross-patent authorizations. They are: UCC, UCC, Toraca, Mitsubishi Rayon, and Toho. Chemistry, Gaul’s Soficar, British Towers Courtaulds, British Morgan Crucible Company MorganCrucible, British Rolls-Royce Power Company RR..."
Shi Changxu was counting the carbon fiber manufacturing companies with core technology in the world today, but Tan Zhenhua heard a name that made him feel incredible. He screamed and interrupted Shi Changxu’s words: "Master , The last one you just said, is Luo Luo?"