The Science Fiction World of Xueba

"What, do you need a laboratory?"

"Yes, grandpa, I have a more interesting idea about carbon nanotube materials, but I ’m just an audience at Jiangda University. I can only enter some basic laboratories and follow the undergraduate to do some basic experimental training. I I can't do experiments designed by myself. I want to find a more professional laboratory for verification. "

Pang Shaoan couldn't help crying: "Xiao Lin, having an idea is a good thing, but learning is a constant thing. You have been listening for two months now, and you haven't mastered the basics of the professional and experimental skills. It's not good to be so good. The experiment is consumable. Now that the funding for scientific research is strictly approved, you are not even a student at Jiangda University. How did you ask grandpa to find a relationship to help you arrange the experiment? "

Pang Xuelin said: "Grandpa, I don't need you to arrange a laboratory for me directly. I hope you can help me introduce a scholar, preferably in the field of carbon nanomaterials, I have a way to convince him!"

Pang Shao'an said for a moment: "You convince the other?"

Pang Xuelin nodded and said, "Yes, grandpa, don't worry, if the other party doesn't agree with me, I won't force it!"

Pang Shaoan hesitated for a moment, and nodded, "Okay, that grandpa will help you find out. As for whether you can convince the other party, it depends on your own ability!"

"Thank you grandpa!"

Uh ...

Pang Shao'an moved quickly, and the next day, he found a suitable candidate for Pang Xuelin.

"Kobayashi, I'm introducing you today to Professor Du Jiaxiang from Jiangda University of Chemical Engineering. Professor Du's research areas are the preparation and application of carbon nanocomposites, the synthesis and structure control of new graphene materials, and the interface of precious metal nanomaterials Design and other fields have a lot of influence, and Professor Du is old-fashioned and has an excellent academic reputation. If you can get his approval, he will take the initiative to help you even if you do n’t have the grandfather's face. That grandpa's face doesn't work either! "

Pang Xuelin laughed: "Grandpa, rest assured, I'm sure it's OK."

庞 Under Pang Shao'an's leadership, Pang Xuelin met each other directly in Du Jiaxiang's laboratory.

Du Jiaxiang looks fifty years old, bald, with thick glasses, and looks unsmiling.

Even if he saw Pang Shao'an, he just shook hands with Pang Shao'an, his expression was indifferent.

Pang Shao'an said, "Xiao Du, please trouble you today."

Du Jiaxiang said: "Professor Pang, you are welcome."

He then turned his eyes to Pang Xuelin, and said, "Student Xiao Pang, I heard your grandfather said that you designed an experiment yourself. Would you like to use my laboratory, can you tell me what you think?"

Pang Xuelin said: "I have a way to prepare single-walled carbon nanotubes with a purity of more than 99% at a relatively low cost."

Du Jiaxiang stared at God and laughed: "Student Xiao Pang, are you kidding me?"

During this time, Pang Xuelin gained a lot of fame at the School of Materials. He was very young and talented. The most important thing was that he studied very hard. It can be said that it is an excellent research seedling. This is also the opinion of Du Jiaxiang. See the reason for Pang Xuelin.

But he didn't expect that such a seedling that seemed down-to-earth and willing to study hard would talk loudly.

Pang Shao'an wondered: "Xiao Du, isn't Xiao Lin's idea reliable?"

Du Jiaxiang said, "Professor Pang, do you know what single-wall carbon nanotubes with a purity of 99% or above mean? Now the construction of planetary engines has come to an end, and research work in other disciplines that have been suppressed over the years has begun to be combined The government attaches great importance. If we can make such carbon nanotubes, the coalition government will invest heavily to industrialize them. Last year, the Nano Center of the Chinese Academy of Sciences produced single-walled carbon nanotubes with a purity of more than 99% through molecular building technology. The coalition government directly allocated 100 million credits to fund their research. We must know that molecular construction is immature and extremely costly. Among the 60 high-tech materials support programs submitted by the Science and Technology Commission last year, high-purity carbon nanotubes and graphite Ethylene is ranked third and fifth. If Xiao Pang can realize the laboratory preparation of high-purity carbon nanotubes, the title of my laboratory director will be directly given to Xiao Pang! "

"Kobayashi, are you really sure?"

Pang Shao'an couldn't believe it. After all, according to Du Jiaxiang, high-purity single-walled carbon nanotubes have plagued the scientific community for decades, and a fifteen-year-old hairy boy claimed to solve this problem. People have a magical feeling.

But Pang Shao'an knew his grandson again, Pang Xuelin was by no means a good-natured person.

Pang Xuelin smiled lightly: "Professor Du, after listening to me, there are currently two methods for preparing carbon nanotubes, one is the chemical preparation method, and the other is the molecular construction method you just mentioned. The chemical preparation method is generally Using hydrocarbons as raw materials, metals as catalysts, most of them are cobalt-based catalysts, and a few are iron-based catalysts, but there are some problems. At present, cobalt-based catalysts can only prepare multi-walled carbon nanotubes, and laboratory purity can be It reaches 95%, and the purity of mass production is about 80%. Iron-based catalysts are better, and even single-walled carbon nanotubes with centimeter-level unit structure can be prepared. However, this catalyst is easily denatured and deactivated under high temperature conditions. , Resulting in extremely high costs, and it is difficult to improve the purity of single-walled carbon nanotubes. "

Du Jiaxiang hesitated for a moment. He did not expect that Pang Xuelin would know so much about the research status of carbon nanotubes, but he still did not believe that Pang Xuelin could solve this problem. He groaned for a moment and said, "It is true to say so It is precisely because of various difficulties that the preparation of high-purity single-walled carbon nanotubes is so difficult. Do you have a specific experimental plan? "

Pang Xuelin smiled: "The solution I think is actually very simple. First, the current iron-based catalysts are easily denatured under high temperature conditions, because the carriers supporting iron atoms are easily denatured. We can consider making a non-variable, high temperature resistant Catalysts, for example, iron-based catalysts with multi-walled carbon nanotubes as a support. Second, most of the current methods for preparing carbon nanotubes are to make them react with the catalyst in the liquid phase, which will also lead to more impurities. Therefore, we can consider making it react in the gas phase. For example, using the gas flow focusing method, first, we prepare a low-purity carbon nanotube suspension, and then according to the Tyndall effect ... "

After hearing Pang Xuelin's thoughts about his experiments, the expression on Du Jiaxiang's face gradually changed. From the beginning, he disagreed, gradually became interested, and finally became dignified.

"Xiao Pang, these are all you think?"

Du Jiaxiang looked at Pang Xuelin Road inconceivably.

Pang Xuelin nodded: "I listened to Jiangda University for two months and found that our material specialty is basically metal materials, or metal-related materials ~ www.readwn.com ~ Instead, it was twenty or thirty years ago. Some of the more popular materials such as graphene and carbon nanotubes have not been studied. So I took a look at related books and found that there is very little research in this area, and the level is not high, so I designed this experiment. I personally think that this can effectively improve the purity of carbon nanotubes ... "

Pang Shao'an was completely silly on the one side, how could he not see that the plan proposed by Pang Xuelin had already attracted Du Jiaxiang's interest.

"Xiao Du, is Xiao Lin's experimental plan really feasible?"

Du Jiaxiang admired, and looked at Pang Xuelin in an incredible way, and said, "In theory, this experimental scheme is indeed feasible, but there is also a problem in this, there are too many experimental variables, the concentration of carbon nanotubes in turbid liquid, heating Evaporation temperature, the flow rate of gas when focusing the gas stream, and the temperature control of the reaction with the catalyst require a perfect mathematical model. Even if this experiment is designed, it will take thousands of experiments at least several years before the results are possible. "

Pang Xuelin laughed: "Professor Du, I have done the theoretical calculations for this experiment and have a preliminary mathematical model. As long as we improve this mathematical model based on the experimental results, I believe that results will be achieved soon. As long as You agree that I will use the laboratory, and then I will send you a copy of the dissertation. The corresponding author is still you. "

Du Jiaxiang waved slightly and waved his hand: "Xiao Pang, you have already convinced me, I will use this lab for you. Just tell me how many consumables and manpower will be needed. As for the thesis, whether it is The theoretical model or the experimental plan are all brought up by you. I can't afford to do these imaginary things. Corresponding authors should not. Come, Xiao Gao, and take Xiao Pang to visit our laboratory. "