Chapter 1559: Talking About Technology

Zhang Tianhao, once an ordinary undergraduate who graduated from Harbin Institute of Technology, chose Jiuzhou Technology because he wanted to find a job that was less busy and closer to home. He even made a lot of funny products when he first started working.

Now, under Gu Qing's training and his own efforts, he has been able to "instruct" the academicians of the former Xia Academy of Sciences.

Li Lun, chief engineer of the rocket project, was like a student beside him, listening patiently to the explanation and asking questions humbly. Although some engineers beside him still looked unconvinced, as Zhang Tianhao's explanation of the technology deepened, those unconvinced people finally lowered their proud heads.

"How can we use graphene technology in terms of materials? Because our current design unit has already added graphene materials, but it still cannot meet the requirements."

Faced with this question, Zhang Tianhao subconsciously raised his head and glanced at Gu Qing.

After seeing the other party nod in agreement, he continued to speak: "First of all, you have to understand what kind of existence the graphene we are talking about now is. At the beginning, we defined graphene as composed of carbon atoms, which has both the characteristics of graphite and olefins.

But in-depth understanding, graphene is actually a two-dimensional carbon nanomaterial composed of carbon atoms in sp2 hybrid orbits forming a hexagonal honeycomb lattice. Because its properties can meet the requirements of ultra-thin, ultra-light and ultra-strong, it is called the "king of new materials".

You should have also heard of the widely circulated concept that if the perfect graphene film can be made into plastic wrap, and this graphene plastic wrap is covered on the cup, it takes an elephant to sit on it until the plastic wrap breaks, which is enough to show its high strength.

Twenty-one years ago, two British scientists peeled off graphite sheets from highly oriented pyrolytic graphite, and then Then stick both sides of the sheet on a special tape, tear off the tape, and split the graphite sheet into two.

Then continue this operation, making the graphite sheet thinner and thinner, and finally get a sheet consisting of only one layer of carbon atoms, which is the first artificial graphene in academia.

But when we draw with a pencil, the traces left by the pencil on the paper may be several layers of graphene.

Inspired by this graphene technology, our Titanium Star Department has made a transparent conductive film. In addition to the development of ultra-fast integrated circuits, the semiconductor department also develops graphene because the electrons in graphene run very fast, and the electron mobility at room temperature is more than 10 times that of silicon materials, and it is also an extremely excellent high-strength and lightweight material, so it has many applications on the space station. "

After talking about the most superficial things, Zhang Tianhao subconsciously turned his head again and looked at Gu Qing.

He knew that the following content was confidential technology within the department. Now there were technicians and some other staff of the rocket company around, and it seemed not suitable to talk about deeper technology here.

Gu Qing casually glanced at Luo Jiazhao, the head of his rocket company, smiled and shook his head and said, "Those who can enter the core area are all project participants. Although Director Luo is responsible for business docking, he is actually a top student in rocket engineering. Just continue talking."

After getting permission, Zhang Tianhao's demeanor was a little more relaxed.

He continued, "The graphene materials of our Titanium Star department have been successfully applied to aerospace thermal protection materials and thermal management to improve the limits of thermal stability and mechanical integrity under various gas or heat flow conditions.

If the aerospace industry wants to develop space stations that allow long-term work in outer space and other equipment for the moon landing project, higher standards are required for the heat resistance and ablation performance of these composite matrixes.

For example, this material is a water-soluble phenolic resin nanocomposite prepared by hot pressing. When the content of graphite oxide is between 0.1% and 4.0%, it is evenly dispersed in the matrix and has good interfacial compatibility with the resin matrix. When the addition amount of graphite oxide is 0.5%, the thermal weight loss of the composite material is significantly improved with the increase of temperature, and the residual carbon rate at 800°C is 9% higher than that of pure resin.

Graphite oxide is prepared by liquid phase oxidation method, and graphene oxide and phenolic resin nanocomposites are prepared by Steglich esterification reaction.

We can prepare graphite oxide from graphite at three different temperatures. Graphene oxide is synthesized and mixed into phenolic resin by ultrasonic bath, with a loading of approximately 0.1% to 2%.

This graphene oxide particle is well dispersed in the resin, and can produce moderate carbon yield and thermal stability even at low loads, so it is also used as a necessary fuel-related substance on the JZ-404 rocket. ”

“At present, this substance can only be manufactured experimentally at home and abroad, but in our special manufacturing plant of Titanium Star, this substance has completed the mass production technology breakthrough, and through in-depth research, we found that this well-dispersed graphene oxide and phenolic plastic composite material also has a great role in improving its mechanical properties and heat resistance. Moreover, they can also synthesize a special graphene material on a special platform, which is currently named JZ34323 by us.

It is significantly better than original graphene and graphene oxide derivatives in improving the mechanical properties, electrical properties and thermal properties of materials. When the content of this substance is 1%, the decomposition temperature and 800℃ residue are optimized to 99℃ and 2.1% respectively.

At the same time, JZ34323 substance was added to our rayon-based carbon fabric. Our laboratory also prepared a second ablation-resistant nanocomposite material with similar performance that is currently unavailable in the industry. This material has many applications in our 4-hour rapid drop experiment some time ago.

There is also a graphene nanomaterial No. JZ952777, which is a high-temperature refractory material combined with graphene oxide. It may be due to the gasification of oxidized functional groups between graphene oxide layers and the formation of finely dispersed amorphous carbon. The use of this material can reduce the ablation rate and mass loss by 76% and 50% respectively.

In addition, there is a special graphene oxide-filled composite material that also has excellent performance in resisting high temperatures and radiation.

In our first phase of experiments, even at very low concentrations, at extreme ablation temperatures, the fiber-matrix can be combined with the fiber using this graphene material, thereby easily improving the various properties of the fiber. "

These engineers of Jiuzhou Rocket Company certainly know how powerful the graphene super copper motor technology and graphene solid-state battery technology installed on the mecha by the Titanium Star Department of the head office are.

But an hour ago, they only knew that it was powerful but didn't know exactly how powerful it was.

And now...