My house collapsed since I became the top scorer in the college entrance examination

Chapter 131 Shortlist for the Chern Mathematics Prize

Montmorillonite is an inorganic hydrophilic substance with small interlayer spacing, making it difficult to disperse in organic solutions. It is also difficult for polymer molecules to be inserted between its layers, so it must be chemically modified first.

The modification method is to use inorganic ions between cetyltrimethylamine salt and MMT layers to form organic montmorillonite through ion exchange. In this way, the interlayer spacing of montmorillonite increases, which is conducive to the insertion of polymers. At the same time, The microenvironment between the layers changes from hydrophilic to lipophilic, and montmorillonite is more easily dispersed in organic solvents.

The specific process is to dissolve montmorillonite in 20wt% cetyltrimethylamine, magnetically heat and stir at 80°C for 4 hours, wash, vacuum dry, then grind, and use Fourier transform infrared spectrometer and X-ray spectroscopy. Analyze it with a ray diffractometer.

The work of Xiao Ran and Kong Jiyuan is to use the data measured by the Fourier transform infrared analyzer to analyze the montmorillonite modification results.

"Junior Brother Kong, have the results shown in the infrared spectrum been released?" Liu Wenhai walked over and asked Kong Jiyuan, who was a little distracted.

Kong Jiyuan was still thinking about Xiao Ran and Tiger, and seemed a little absent-minded. At this moment, when he heard Liu Wenhai's voice, he woke up from a dream and responded quickly: "Oh! Come out, Senior Brother Liu."

As he spoke, he took out the printed infrared spectrum chart from the instrument and handed it to Liu Wenhai.

Liu Wenhai took the infrared spectrum chart and carefully observed the data and waveforms on it, frowning as if he was thinking about something.

After a while, he raised his head and looked at Kong Jiyuan, with a trace of doubt in his eyes: "Junior Brother Kong, this result seems a little wrong."

"Oh? What's wrong?" Hearing this, Kong Jiyuan came over to look at the infrared spectrum, then scratched his head and said, "There's no problem, I did everything as you asked."

"There is definitely something wrong with this result." Liu Wenhai shook his head, then raised his head and looked at Kong Jiyuan, frowning and said: "Are you sure you didn't enter the wrong data?"

"Uh" Kong Jiyuan was about to say something, when Xiao Ran said with a smile: "Let me take a look."

"Well, come and take a look!" Liu Wenhai was still very convinced of Xiao Ran's ability and immediately handed him the infrared spectrum chart.

Xiao Ran took the picture and took a closer look, then raised his head and glanced at Kong Jiyuan with a half-smile: "Senior Brother Kong, did you forget to adjust the parameters of the inorganic cations?"

When Kong Jiyuan heard this, he quickly looked at the computer and compared it with the data Liu Wenhai gave him. His face suddenly turned red. He had been thinking about Xiao Ran just now, but he forgot to adjust a parameter, causing the results to deviate.

"It's true! I'm sorry, Brother Liu, I was negligent." Kong Jiyuan touched his nose awkwardly, then quickly adjusted the parameters and took another measurement.

Liu Wenhai said with some dissatisfaction: "Junior Brother Kong, what happened to you today that you can even make such a low-level mistake?"

"My fault!" Kong Jiyuan sneered, "It's not that what happened to Junior Brother Xiao was so shocking that I can't even recover even now."

"Why are you still thinking about this?"

Hearing this, Liu Wenhai shook his head helplessly: "Okay, just be more careful next time. Scientific research requires rigor and concentration, and there is no room for sloppiness."

"I got it, Senior Brother Liu!" Kong Jiyuan nodded angrily. Just as he was about to go back and ask Xiao Ran about this again, he heard Liu Wenhai turn around and ask: "Junior Brother Xiao, did you really subdue a tiger with your bare hands?"

Kong Jiyuan:

Xiao Ran also glanced at Liu Wenhai helplessly: "Senior Brother Liu, why are you joining in the fun?"

"Ahem, isn't it that the results of the infrared spectrum haven't come out yet? I'm just idle." Liu Wenhai coughed and said in a serious tone.

have to! If we don't make it clear today, we won't be able to continue this experiment!

Xiao Ran had no choice but to briefly tell the curious duo about the process of subduing the tiger yesterday, which could satisfy their curiosity.

"You mean, when the tiger was about to bite Su Yunjin yesterday, you grabbed the tiger's tail. When it turned around to bite you, you pulled its tail hard and threw the tiger to the ground? "

"That's probably what happened!"

Liu Wenhai and Kong Jiyuan looked at each other. There were so many flaws in it that they didn't know how to complain.

"Are you sure you are dealing with a tiger and not a bigger orange cat?" Liu Wenhai asked his soul.

Kong Jiyuan also murmured in a low voice: "I thought someone using a slide shovel to deal with a tiger would be shocking enough, but I didn't expect someone to be braver than him. Whose general is this!"

I knew you would have this expression.

Xiao Ran glanced at the two of them angrily: "Okay, I've told you what happened. As for whether it's true or not, you can judge for yourself, so don't ask me!"

"But no matter how you think about it, this is too outrageous." Kong Jiyuan wanted to say something else, but was interrupted by Liu Wenhai.

"Okay, okay, don't dwell on this issue. Junior Brother Xiao said yes, then that's it." Liu Wenhai winked and patted Kong Jiyuan's shoulder, signaling him not to ask any more questions.

Kong Jiyuan was stunned for a moment, then understood and said cheerfully: "My, my! Junior Brother Xiao, we shouldn't doubt you!"

Xiao Ran had a black line on his face: "Ganggun, don't send it. You are disgusting me with this sinister expression!"

believe it or not!

At this time, the results of the infrared spectrum also came out. Kong Jiyuan smiled and quickly checked the data and waveform carefully. After confirming that they were correct, he handed it to Liu Wenhai: "Senior Brother Liu, there should be no problem this time."

Liu Wenhai took the infrared spectrogram and observed it carefully for a while and then nodded: "There is no problem this time." After saying that, he looked at Xiao Ran: "Junior Brother Xiao will look at you next."

"I'm analyzing it!"

Xiao Ran responded without raising his head, ignoring these two guys and just focusing on the spectrum chart in front of him.

"After montmorillonite modification, -CH3 and -CH2- stretching vibration absorption peaks appeared near 2851cm-1 and 2920cm-1 respectively. The original absorption peak belonging to Na+ or K+ around 1655cm-1 disappeared, but at 1540 cm-1 A strong N-H absorption peak appears at .

In addition, judging from the small-angle XRD characterization of montmorillonite, before modification, montmorillonite has a strong diffraction peak at 2θ = 5.79°. After modification, the 2θ diffraction angle moves to the small angle direction. According to the Bragg equation (2dsinθ= λ) It can be calculated that the interlayer spacing of montmorillonite increases from the original 1.32nm to 1.99nm."

After Xiao Ran initially analyzed the data measured by the Fourier transform infrared analyzer, he concluded in a relaxed tone: "The results of this experiment are not bad. It can be seen that the larger organic cation groups and the montmorillonite layer are Smaller inorganic ions are exchanged between each other, and the interlayer spacing is expanded, which is more conducive to the insertion of polymer molecules during membrane production."

Liu Wenhai looked at his side face with mixed feelings in his heart. Should he say it or not, although Junior Brother Xiao likes to show off a bit seriously, there is no doubt about his academic strength, whether it is proving mathematical theorems or During the research in the laboratory, Xiao Ran showed extraordinary talent and strength.

Even he admired this from the bottom of his heart.

"So the next experiment can be carried out?" Kong Jiyuan interjected and asked.

Liu Wenhai nodded: "Well, let's start the next experiment."

In the following time, several people devoted themselves to intense experiments. After the montmorillonite modification was successful, the next step was to prepare the montmorillonite/polyvinylidene fluoride-based composite polymer electrolyte.

This process is relatively complicated. Currently, the mainstream in the scientific research community is to prepare polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP)-based polymer electrolyte. Generally, the Bellcore method or phase transfer method is used to prepare a microporous membrane, and then the membrane is connected to the positive and negative sides of the battery. The poles are wound into a battery core, and after the liquid is injected, the electrolyte membrane absorbs the electrolyte and is activated to form a polymer battery. Compared with the above two film-making processes, the Bellcore method requires the use of a large amount of organic plasticizing extractants, which is complex and costly. The phase transfer method introduces a non-solvent (usually water) into the polymer solution, thereby causing the polymer solution to Phase transfer creates holes, and the operation is relatively simple.

However, in order to realize the commercial application of this type of polymer battery, in addition to simplifying the electrolyte preparation process, it is also necessary to ensure its high room temperature ionic conductivity, good mechanical strength and stable electrode interface properties.

After making the polyvinylidene fluoride-hexafluoropropylene-based polymer electrolyte, the polyvinylidene fluoride-hexafluoropropylene and montmorillonite were mixed with N, N′ dimethylformamide (DMF) respectively, and dispersed by ultrasonic oscillation for 0 minutes and then magnetically heated and stirred at °C for hours, let it stand to remove bubbles, and obtain a viscous solution, which was then coated on the glass plate with a wet film preparation device.

Finally, scanning electron microscopy was used for detection.

Several people worked hard all day and finally prepared a batch of samples.

The next step is to test and analyze this batch of samples to see if their performance meets expectations.

"Finally, I'm done." Xiao Ran stretched out and stretched his stiff neck and wrists.

"Yes, it's been a busy day." Kong Jiyuan also sighed, "But finally we have prepared the sample, and then we can test it."

"I hope the test results will be good." Liu Wenhai also said with some expectation.

After all, they have invested a lot of time and energy in this project. If it can succeed, it will be the greatest affirmation for them.

"I'm going back first!" Xiao Ran greeted the two of them before leaving the laboratory.

As soon as I walked out of the laboratory, I happened to bump into Lao Tian.

"Teacher Tian."

Lao Tian raised his head and saw him, and said with a smile: "Xiao Ran, I also said that I was preparing to come over to find you."

"Looking for me?" Xiao Ran was a little confused: "Teacher, do you have any instructions?"

Lao Tian looked at him with a smile and said, "Nothing, I just came to congratulate you, Xiao Ran!"

"What are you congratulating me for?" Xiao Ran was stunned for a moment, then realized: "Teacher, are you talking about what happened at the International Union of Mathematicians today?"

Lao Tian nodded, his smile not diminishing: "Only part of it."

"Ah? Are there any other happy events besides this?"

"Yes," after a moment of pause, Lao Tian said leisurely, "My old friend called me just now and informed me that you have been shortlisted for next year's Chen Shengshen Mathematics Award."

After saying that, Lao Tian smiled and joked: "Do you think I should congratulate you?"

The Chen Shengshen Mathematics Award is one of the three major mathematics awards in China and one of the important awards in the international mathematics community. It is named after the famous mathematician Chen Shengshen and aims to commend scientists who have made outstanding contributions in the field of mathematics.

For a young scholar like Xiao Ran, being included in the candidate list is already a great honor and recognition.

When Xiao Ran learned that he had a chance to win this award, he would be lying if he said he wasn't excited.

However, he still maintained a modest smile on his face and said: "I just made it to the short list. I don't know whether I will win or not."

Lao Tian laughed and pointed at Xiao Ran, not knowing what to say: "Call me humble, you don't even care about being on the shortlist. Call me crazy, you know you may not win the award."

"This is the Chen Shengshen Mathematics Award! This award is beyond the reach of many scholars in China, but you are quite calm!"

"It all depends on Teacher Tian's support!" Xiao Ran flattered him. Of course, he also had a certain degree of sincerity.

After all, the Chen Shengshen Mathematics Award is generated by recommendation. Those with this recommended quota are either domestic mathematics experts who have made important contributions to the basic theory or applied research of mathematics, or various research units, universities, and national academic institutions. Only a group or five professors can recommend candidates for the award.

Xiao Ran was successfully selected for the candidate list. Although he also had his own academic achievements, his age was there after all. Youth is sometimes an advantage and sometimes a disadvantage. It all depends on how you understand it.

To be honest, in the domestic academic circle, the phenomenon of seniority is still quite serious. Isn’t there a saying circulating on the Internet that even if Hawking comes, he still has to stand up and toast three glasses of wine to the leader!

Although this sentence is a bit exaggerated, it can be laughed at by major netizens and empathize with it, which also explains some truth.

He can be shortlisted for next year's Chen Shengshen Mathematics Award. It is estimated that Lao Tian is working hard behind the scenes. No wonder Lao Tian's voice is rarely seen in the laboratory these days. If his guess is correct, Lao Tian is probably helping him with his work these days. Woolen cloth.

Lao Tian smiled and waved his hand, indicating that Xiao Ran did not need to thank him: "This is all the reward for your own efforts and talents. I just gave it a push. If you want to thank him, you should thank Lao Lu properly.

He has been busy with your affairs these days. He is writing recommendation materials for you and contacting old classmates to find connections. He is always worried about your affairs. "

"You'd better thank him properly!" Lao Tian patted Xiao Ran on the shoulder and said with emotion.

老陆

Xiao Ran felt warm in his heart after hearing this. He knew that Lao Lu and Lao Tian had really put a lot of thought into his matter.

Although he has always been very confident, he also understands the importance of connections and connections in this circle. Even though he is very confident, even without connections and connections, he can still reach the top with the help of the system, but it is inevitable that there will be problems along the way. Encountered some stumblings.

The existence of Lao Lu and Lao Tian was like his guiding light, making his academic path smoother.

"I will, Teacher Tian!" Xiao Ran took a deep breath and said solemnly: "The kindness between you and the teacher will be remembered by Xiao Ran for the rest of his life!"

"Hahaha! No need to be so serious!" Lao Tian smiled and waved his hand, saying so, but with a bit of relief on his face, "By the way, how did your experiment go? Is there anything you need from me? Where to help?”

Xiao Ran shook his head: "The experiment is progressing quite smoothly. A batch of samples have been prepared. The next step is to test and analyze the samples. If necessary, I will ask you for help."

"Okay, then go and do your work." Lao Tian waved his hand, "I won't talk nonsense with you, just go and have fun by yourself."

Should he say it or not, Lao Tian really understands him!

If Lao Tian hadn't been there, he would have really planned to open champagne to celebrate!

After saying goodbye to Lao Tian, ​​Xiao Ran wanted to go to Lao Lu to thank him, but then Su Yunjin suddenly called.

Only then did he remember that he had promised Su Yunjin in the morning to come out to meet her tonight, so he gave up.

(End of this chapter)