Sunday, May 10th

Zhang Yi arrived as promised.

At half past eight in the morning, after having breakfast in the cafeteria, Zhang Yi came to the School of Materials.

In Professor Li's office.

To Zhang Yi's surprise, Professor Li and the others were waiting for him in the laboratory early, and they all wore experimental clothes, looking like they were waiting for battle, and Lin Xiayu was among them.

However, Lin Xiayu didn't give him a good face at this time, his face was slightly covered with frost, and he was full of disdainful expressions.

She was in a good mood, and planned to do experiments according to her own ideas, but she was forcibly summoned by Professor Li to do an experiment with Zhang Yi, which not only wasted her precious time, but also threw all her energy into Zhang Yi's non-existent experiment, so that she didn't even have a helper.

This can make her angry, but her arms are better than her thighs, and if she doesn't obey and go home, she will definitely be criticized, all thanks to Zhang Yi.

Seeing that Professor Li also changed into a lab coat and sat on a chair, Zhang Yi felt some admiration in his heart, and he also attached great importance to this matter in his heart.

"Zhang Yi is here, I'm waiting for you, come and sit." Seeing Zhang Yi come in, Professor Li actually stood up from the chair with a smile, and had the intention of greeting Zhang Yi.

"I'm sorry to be late, I'm waiting." Seeing that Professor Li put down his body and had no shelf, Zhang Yi also intended to be close, and he was more sure of this cooperation, and sat down on the chair after walking into the office, which happened to be the same position as last time.

I didn't expect that Professor Li, as a mentor, would personally participate in the experiment, Zhang Yi is very familiar with the domestic scientific research environment, and usually the mentor will not go to the laboratory to do some basic experiments.

Because these experiments are not only boring, but also take a lot of time, the supervisor's time is very precious, most of them are not willing to spend on it, these things can be done by graduate students, and the supervisor only needs to know the experimental process and results.

Since Professor Li was waiting for Zhang Yi in the laboratory in his lab coat, it can be seen that he cares very much about this experiment. Since Professor Li takes it seriously, Zhang Yi naturally will not be perfunctory at will.

"How Zhang Yi, should you start directly or do you need to arrange something?" Professor Li sat back in his seat and asked.

"Let's get straight to it." Zhang Yi's buttocks didn't sit hot, and he stood up.

His main task this time is to do a demonstration experiment, so that Professor Li's students can learn all aspects of molecular sieve preparation of composite sunscreen, and finally get a complete finished product, then his task is completed.

The specific personnel allocation should have been arranged by Professor Li, but looking at the situation, Professor Li also wanted him to be fully responsible.

But he doesn't care, anyway, just these few people, plus him who do experiments, there are only 4, Professor Li can not be instructed.

Several people came to the laboratory.

Zhang Yi first confirmed the experimental equipment prepared by Professor Li last time, and first made sure that the equipment and materials needed for the experiment were complete, and then began to make further arrangements.

But fortunately, I have been doing experiments on this sunscreen before, and most of the experimental materials are available, and the materials that Zhang Yi needs are ready to supplement a little.

The next experiment needs to be carried out in a division of labor, and someone needs to prepare nano titanium dioxide, someone to prepare molecular sieves, and someone to assemble.

These are delicate tasks that require a lot of patience, and the slightest mistake in the pool experiments will be wasted, and the most difficult and critical step is assembly.

Among several people, Lin Xiayu is the only girl, and such a delicate job, of course, it is most suitable for her.

But Lin Xiayu was not happy, so he turned his head to the side and muttered, "Why should I do this?" I don't do it. ”

"Lin Xiayu, if you want to do it, you can do it, what so much nonsense." Professor Li's face was covered with frost, and he spoke honestly and politely, which immediately frightened Lin Xiayu so much that he didn't dare to squeak.

Everything was ready, and several people gathered around Zhang Yi to watch him start the experimental operation.

When Zhang Yi demonstrated, Professor Li looked at it very carefully and seriously.

He couldn't help it.

After Ye Bin prepared all the materials needed for the experiment, Professor Li has been thinking about a question, that is, is Zhang Yi's plan feasible?

Don't just paint cakes to satisfy your hunger, and in the end it will be in vain, it will be a waste of time, not to mention, and you will not be able to complete the project.

You can't completely bet on Zhang Yi, at least you have to know it in your heart, Professor Li thought about it, and finally couldn't hold back, wanting to know whether the experiment would work or not.

Anyway, Zhang Yi told him about the experimental process, Professor Li didn't believe that a third-year undergraduate could do an experiment, and he couldn't do it as a professor?

Finally, in the laboratory, the door was closed, and Professor Li stayed for a whole day.

When he came out, Professor Li even doubted that what Lin Xiayu said was right.

Zhang Yi is a liar!

He has repeatedly done dozens of sets of experiments in the laboratory, and the research group has been studying before the preparation of nano titanium dioxide, and Professor Li can be said to be very proficient.

The key technologies are the preparation of molecular sieves and the assembly of nanocomposite sunscreens.

The preparation of molecular sieves has been repeatedly explored, and finally made, although it is not perfect, but at least the finished product can be obtained, but the assembly of composite sunscreen can not be done.

Dozens of sets of experiments all ended in failure, and the final experiment was also poorly done and completely clueless.

This had to make him wonder, is this technology not working in the first place? Or is there something wrong with his operation?

It seems that these doubts can only be revealed after Zhang Yi personally does an experimental demonstration.

Before Zhang Yi arrived in the morning, Professor Li gave a death order to several students, and Zhang Yi must write down every detail of the entire operation demonstration, no matter whether Zhang Yi is holding a beaker in his left hand or a beaker in his right hand, he can't make a mistake.

When Zhang Yi started to do experiments, he was actually similar to Professor Li's previous experiments, except that his methods were more skilled.

When Zhang Yi did the experiment, he did not do it step by step, but in order to save time, several links that could be carried out at the same time were carried out at the same time, and the dazzling operation made several people stunned.

Zhang Yi also explained while operating, and analyzed the experimental skills and precautions in as much detail as possible.

When the molecular sieve was prepared and assembled, several people next to them held their breath, and the needle drop could be heard in the laboratory, and everyone was afraid of missing any detail.

Whether this project can be completed depends on Zhang Yi's final operation.

Zhang Yi also deliberately slowed down the pace of the experiment, operated slowly, and explained in detail, but the accuracy was still extremely high, and the hand of the dropwise reagent was very stable, not more than half a point, no less than a little, only just right, in order to achieve perfection.

After Zhang Yi added the last drop of reagent, he also let out a sigh of relief and said lightly: "Okay, the experiment is over." ”

"Is that okay?" Professor Li wondered.

"Yes, wait a few more minutes and the finished product will be ready." Zhang Yi has done this experiment countless times, and he can do this kind of operation at his fingertips.

Waiting is always the most tormenting, and Professor Li and the others all craned their necks and looked into the experimental container.

While several people were anxiously waiting, Zhang Yi sat down on the chair next to him and drank a glass of water by the way.

The whole process operation has been demonstrated, and Zhang Yi is tired enough, these are operations with high precision requirements, Zhang Yi is also extremely skilled in order to achieve a very high success rate, for others, it is very good to succeed once or twice in ten operations.

The mental concentration is highly concentrated, and there is a lot of mental consummation, but Zhang Yi is familiar with it, and the experimental process is still very smooth.