After successfully experimenting to prepare nitroglycerin, Yu Hua did not relax at all, because the next step was the most dangerous situation in the entire single-base propellant development process. He held his breath and held the beaker with both hands, fully embracing it with his ten fingers.
, took out the ice bucket, and walked towards the experimental product placement area on the left.
Walk steadily and move carefully.
The whole process must be extremely delicate and stable without any jitter. The cup of nitroglycerin in your hand, which weighs about 2 kilograms, is enough to destroy the entire laboratory and is extremely powerful.
Yu Hua was solemn and solemn, and even Xu Rui became slightly nervous, always paying attention to Yu Hua's movements.
"Huh... It's finally done, Ruizi. Don't touch this bottle casually. Any vibration or impact will cause it to explode. It's very unstable. The explosion power is equivalent to a cannon shell." After putting in the fresh nitroglycerin,
, Yu Hua carefully sealed it, and then he breathed a sigh of relief, motioning Xu Rui to come over, and when Xu Rui walked over, he explained carefully.
It was already half past ten in the night. Today's goal of preparing nitroglycerin was successfully completed. Yu Hua was not ready to continue research.
You have to eat the food one bite at a time, and you can't rush to make explosives.
Nitroglycerin is very stable at room temperature, has high thermal stability, and will not explode due to temperature changes.
"Cannonball?!" After hearing Yu Hua's words, Xu Rui looked at the beaker in the experimental product placement area, his eyes changed, and he immediately understood what his husband was studying.
This is... dynamite!
The explosion power of a small bottle of something was equivalent to that of a cannon shell. Xu Rui's mind was deeply shocked and he could not imagine why this bottle of something contained such terrifying power.
"Okay, that's it for today. Let's go back first. Next, you are responsible for boiling the cotton, removing as many impurities as possible, and drying it to make refined cotton. Are there any problems?" Yu Hua smiled after seeing Xu Rui's expression.
, and then made arrangements.
Boiling cotton involves the main structural component of single-base propellant - nitrocellulose.
The scientific name of nitrocellulose is cellulose nitrate, which is obtained by the esterification reaction of cellulose and nitric acid. The hydroxyl groups of each chain link of cellulose are esterified into nitrate groups under the action of nitric acid.
Nitrocellulose, also known as nitrocellulose, digested cellulose, etc., is the main structure of single-base propellant.
The first step in making nitrocellulose is to make refined fiber, and cotton is the best natural source of refined fiber. It is cheap and widely available.
Of course, if cotton is not available, silk, bark, green hemp, straw, sugar cane and any plant containing cellulose can also be used.
"No problem." Xu Rui shook his head.
"Let's go." After receiving Xu Rui's reply, Yu Hua nodded with satisfaction, picked up the pen and the experimental notebook that recorded the precious experimental data, and left the laboratory with Xu Rui.
Once refined cotton is available, Yu Hua can configure nitrocellulose and complete the first single-base propellant technology.
The formula of this single-base propellant comes from a military boss at Station B. The entire video contains an extremely detailed development process, which can be described as a step-by-step tutorial. The formula is mainly composed of two types of nitrocellulose with different nitrogen contents, and its overall performance is extremely excellent.
When Yu Hua was interested in chemistry, he was lucky enough to watch this video and collect it.
However, when I was about to watch it again two days later, the video was no longer available.
Yu Hua believed that this excellent single-base propellant from later generations would definitely shine in the upcoming Anti-Japanese War.
After the two left the laboratory, they separated. Xu Rui went home, while Yu Hua returned to No. 4 Middle School.
It's late at night and there's no one on the road.
About ten minutes later, Yu Hua returned to No. 4 Middle School. At this time, the library was closed. There were many students in the school passage, most of them from the third grade. The graduation exam was coming, and all the students in the third grade were more excited than before.
For hard work and hard work, Yu Hua remained calm and quietly joined the crowd, embarking on the road back to his dormitory.
"Crack!"
After walking a few steps, he was suddenly tapped on the shoulder.
Yu Hua was startled for a moment, a little confused, and turned around, only to see Lin Wan wearing a winter coat beside him, holding an English textbook in his arms, smiling and spitting out white mist.
"Jin Yu?" Yu Hua was a little surprised when he saw Lin Wan.
Lin Wan spit out a mouthful of white mist and said with a smile: "The back looks familiar, but I didn't expect it was really you. Did you just come back?"
"No, I have something to do tonight. I came back from Tsinghua University at noon today. How have you been these two days?" Looking at Lin Wan's peaceful and gentle smile, Yu Hua couldn't help but have a smile on his face. He nodded and asked with concern.
.
Lin Wan hugged the book, shook her head, and said as she walked: "As usual, I have learned everything I need to learn, and I will just wait for the city-wide joint exam in May."
"If I remember correctly, you are going to be a recommended student of Peking University, right?" Yu Hua followed up and asked thoughtfully.
Lin Wan nodded: "Well, Peking University, I have always wanted to go to Peking University. From now on, you will be in Tsinghua University and I will be in Peking University. We can occasionally visit each other. How about you, how have you been studying recently?"
"Same as you, same old, I just learned the real variable function today." Yu Hua smiled.
"talent?"
When Lin Wan heard this, the corners of her mouth twitched slightly, and she couldn't help but roll her eyes at Yu Hua. Is this guy speaking human language?
I have already learned the real variable function at the college level in high school, and I still have a "talent".
"I'm here, Jin Yu. We'll talk to you next time. I'm going back first." In response to Lin Wan's rolling eyes, Yu Hua smiled slightly and walked to the door of the boys' dormitory. He then said goodbye to Lin Wan and sent Lin Wan to the girls' dormitory without saying anything.
At the door, because it is not allowed at all.
Lin Wan nodded, smiled and said: "Goodbye, let's continue to work together."
"good."
Yu Hua smiled.
After finishing her words, she turned around to face the brightly lit boys' dormitory. Lin Wan walked towards the girls' dormitory with a smile on her face and her whole body seemed to be in a happy mood.
Go up the stairs and come to Erjiaer.
Yu Hua pushed open the door and walked in. The lights in the room were bright and everyone was studying at their desks.
Seeing this scene, Yu Hua did not disturb anyone, quietly returned to the bed, and put the experimental notebook on his body into his personal locker.
Immediately afterwards, he took a new notebook and returned to his position. Zhou Yuan, Liu Tao and others heard the noise, looked up and saw that it was Yu Hua, and then continued to study.
The room was filled with the sound of pens and paper scraping together.
Sitting upright, Yu Hua looked calm, held a pen in his right hand, opened the first page of his notebook, and wrote a series of formulas and English letters.
This is the matrix mathematical model and calculation formula of the Red Secret. Yu Hua, who has personally participated in the core work of deciphering the Red Secret, clearly remembers every content.
After three times, five and two, he finished writing the matrix mathematical model and calculation formula. Immediately afterwards, Yu Hua began to write two code books silently. Tomorrow morning, these top-secret things will be sent to Zhang San in the name of 'patriotic scholar'
Lin Wan from Peking No. 4 Middle School.
As for when Lin Wan can receive it, it depends on the efficiency of the Peiping Post Office.
Yu Hua has done everything he can. Everything depends on God's will.