Super-divine civilization begins with the civilian use of dark energy technology

Chapter 92 Improving the graphene preparation process (please subscribe)
The preparation quality of graphene is related to the number of layers. The lower the number of layers, the higher the quality.

There are three main methods for preparing graphene.

The first is the mechanical exfoliation method, which uses mechanical force to peel off graphene from the surface of the graphite crystal.

The specific steps are to apply sticky glue or tape, tear off the graphene layer, transfer it to other substrates, and then use chemical methods to remove the glue or tape to obtain a pure graphene film.

Although this method is simple to operate, the graphene obtained basically maintains a complete crystal structure.

However, it has limitations and needs further improvement and improvement in the future.

The second is the redox method. The redox method uses chemical reagents such as sulfuric acid and nitric acid and oxidants such as potassium permanganate and hydrogen peroxide to oxidize natural graphite to increase the spacing between graphite layers. Inserting oxides produces graphene oxide.

Then, the reactant is washed with water, and the washed solid is dried to obtain graphene oxide powder. The graphene oxide is exfoliated by physical exfoliation, high-temperature expansion, and other methods to obtain graphene oxide.Finally, graphene oxide is reduced through chemical methods to obtain graphene.

This method is simple to operate and has high yield, but the product quality is low. The redox method uses strong acids such as sulfuric acid and nitric acid, which is highly dangerous and requires a large amount of water for cleaning, causing greater environmental pollution.

Graphene prepared using the redox method contains rich oxygen-containing functional groups and is easy to modify.

However, when reducing graphene oxide, it is difficult to control the oxygen content of the reduced graphene. At the same time, graphene oxide will continue to reduce under the influence of external conditions such as sunlight and high temperature in the carriage during transportation. Therefore, the redox method is used to produce The quality of graphene products is inconsistent from batch to batch, making it difficult to control quality.

The third method is SiC (silicon carbide) epitaxy. The SiC epitaxy method sublimates silicon atoms out of the material in a high-temperature environment in ultra-high vacuum, and the remaining C atoms are reconstructed through self-organization, thereby obtaining a SiC lining. This method can obtain high-quality graphene from bottom graphene, but this method generally has higher requirements for equipment.

Commercial graphene preparation depends on cost. The cost of graphene preparation has been reduced by Huaxia Company, which mainly uses the second method.

Of course, Huaxia Company is also involved in other methods. The quality of graphene required by various industries is different, and different preparation methods are used according to quality requirements.

What Jiang Fan is improving now is the second method.

With the help of his brain, he made certain improvements in the redox reaction.

In an office, there were only Jiang Fan and Shao Guanghong, the manager of the graphene R&D department.

He explained to Shao Guanghong the improved redox reaction, which is to add and modify some steps to make the redox reaction more complete and make the prepared graphene contain less oxygen atoms.

Shao Guanghong nodded repeatedly, but he didn't agree with it. If there was such an improvement, it wouldn't be Jiang Fan's turn.

Although Jiang Fan invented Xingnong Chemical Fertilizer, graphene and chemical fertilizers are two different directions. Although they both appear to be chemical reactions, the research directions are different.

In his eyes, Jiang Fan's invention of agricultural fertilizer was already a top achievement in the world.

Jiang Fan was just an undergraduate. He thought Jiang Fan was just unlucky, so he invented Xingnong Fertilizer.

Achievements like this should only appear in the hands of PhD students, or at least in the hands of master's students.

The knowledge learned by undergraduates is not advanced, strictly speaking it is just an introduction.

So he felt that Jiang Fan was lucky to have invented agricultural fertilizer.

If Jiang Fan also makes new progress in the preparation of graphene, then does he still need to mix it?

In the field of graphene, many PhDs in chemistry are weaker than him.

Why does Jiang Fan, who is engaged in chemical fertilizers, get involved in the graphene preparation process?
If Jiang Fan was more mature, maybe he might still believe it and do what Jiang Fan said, but Jiang Fan is really too young!

Looking at Jiang Fan's young face and fair skin, it was really hard for him to believe Jiang Fan.

Jiang Fan frowned slightly, Shao Guanghong was not an actor, and he could see Shao Guanghong's impatience.

He shook his head helplessly. This may be the stubbornness of scientific researchers!
Fortunately, Shao Guanghong is his employee, so the solution is simple.He stared at Shao Guanghong and ordered: "Repeat what I just said."

Shao Guanghong was embarrassed for a while. He didn't listen carefully at all just now.

He also realized there was something wrong with his performance.

The main reason is that he is very dissatisfied with Nongxing's acquisition.

How can a fertilizer company understand graphene batteries?
If it weren't for Nongxing Company's generous offer and the fact that his next employer hadn't been found yet, he would have resigned long ago.

In fact, he has been looking for a next home, but this one is not easy to find!

At his level, and as a manager of the R&D department, the search may take several months.

Shao Guanghong shook his head slightly. His own mentality was not right to begin with. When facing Jiang Fan, a young man, he failed to restrain his contempt.

This created an embarrassing situation.

He could only laugh and did not answer Jiang Fan's question.

Jiang Fan glared at Shao Guanghong and said: "I will explain it from the beginning. After I finish explaining it, if you can't reproduce what I said, you can't improve the process according to your explanation."

"Nongxing Company will fire you."

"If you don't want to do it anymore, you can say it now."

Shao Guanghong hesitated and said, "I will improve the craftsmanship according to your requirements."

I haven't found my next job yet, and the salary here is so high, so it's better not to leave.

Anyway, I just tried it out according to Jiang Fan's method. No matter whether it works or not, as long as I can make a difference.

Jiang Fan stared at Shao Guanghong and scolded: "I'll give you a month. If you don't try my method a few times, then you should resign!"

Shao Guanghong looked serious and promised: "I promise to test it five times."

The difficulty is only in the initial equipment modification. As long as these are completed, it is relatively easy to do it a few times.

Jiang Fan nodded and continued to explain to Shao Guanghong.

After he finished speaking, he stood up and left regardless of whether Shao Guanghong remembered it or not.

When the process is completed, he will come over and take a look.

Whether you can follow his request or not will be seen when the time comes.

The technological transformation he just talked about is still within the scope of Blue Star's technology, and dark energy technology has not yet been applied.

Any chemical reaction will be affected by the environment. Temperature, air, pressure, etc. all have a huge impact on chemical reactions.

Of course, the ubiquitous dark energy also has a certain impact on chemical reactions.

It’s just that dark energy does not interact with any visible matter, so the dark energy concentration is a fixed value.

It's different now, he can slowly adjust the dark energy concentration.

(End of this chapter)