Xueba's Sea of ​​Stars

Chapter 281 Mural (Fifth)

On the first day back at HKUST, Director Jiang called Wu Bin to the office soon and asked him to start preparing for graduation.

"Ah, so soon?" Wu Bin thought that there would be a buffer period or something, but he didn't expect Director Jiang to tell him about graduation just after he came back.

"There's no need to delay this matter, and I mean you can start writing your graduation thesis by hand, do you think it will be soon?" Director Jiang asked Wu Bin.

"Not really." Wu Bin shook his head.

"Then you should hurry up and start preparing." After speaking, Director Jiang added: "But don't think that just because you can graduate, you can just write a job post."

"Of course not." Wu Bin shook his head hastily.

"Well, I believe you are not the kind of person who would do such a thing, so go and do your work."

Walking all the way back to the laboratory with the question of what topic to choose as a graduation thesis, Wu Bin was about to change his clothes when he heard Feng Jinhui call to him and said: "The people from the scientific research department came to you two days ago, I said you If he wasn't there, he left a phone number for me."

"People from the scientific research department are looking for me?" Wu Bin asked very unexpectedly.

The Department of Science and Technology Archaeology, Department of Science and Technology, is a very distinctive department of HKUST. It uses modern technology to analyze ancient remains to obtain rich potential information, and then combines archaeological methods to explore human history.

"But I don't seem to have any communication with people in this department..."

But since everyone came to us, maybe they were looking for him in an emergency, so Wu Bin picked up his mobile phone and called the other party.

On the first day back at HKUST, Director Jiang called Wu Bin to the office soon and asked him to start preparing for graduation.

"Ah, so soon?" Wu Bin thought that there would be a buffer period or something, but he didn't expect Director Jiang to tell him about graduation just after he came back.

"There's no need to delay this matter, and I mean you can start writing your graduation thesis by hand, do you think it will be soon?" Director Jiang asked Wu Bin.

"Not really." Wu Bin shook his head.

"Then you should hurry up and start preparing." After speaking, Director Jiang added: "But don't think that just because you can graduate, you can just write a job post."

"Of course not." Wu Bin shook his head hastily.

"Well, I believe you are not the kind of person who would do such a thing, so go and do your work."

Walking all the way back to the laboratory with the question of what topic to choose as a graduation thesis, Wu Bin was about to change his clothes when he heard Feng Jinhui call to him and said: "The people from the scientific research department came to you two days ago, I said you If he wasn't there, he left a phone number for me."

"People from the scientific research department are looking for me?" Wu Bin asked very unexpectedly.

The full name of the Department of Scientific Research is the Department of Science and Technology Archeology. It is a very distinctive department of the University of Science and Technology. It uses modern technology to analyze ancient remains to obtain rich potential information, and then combines archaeological methods to explore human history.

"But I don't seem to have any communication with people in this department..."

But since everyone came to us, maybe they were looking for him in an emergency, so Wu Bin picked up his mobile phone and called the other party.

"Hello, who is it?" A man's voice came to mind on the other end of the phone.

"Hello, I'm Wu Bin. I heard from Teacher Feng that you came to see me?"

"Oh! Wu Bin, yes, I've been looking for you, but it's not convenient to talk about it on the phone. How about we go to the volute to talk?"

"Oh... let's go."

So Wu Bin stepped on the bicycle with a little inexplicability, and soon came to the door of the Volute Time restaurant.

"Here, classmate Wu Bin."

As soon as Wu Bin parked his car, he saw a boy with glasses waving at him at the entrance of the restaurant.

"Hi, are you looking for me?" Wu Bin walked over and asked.

"Yes, let me introduce myself first. My name is Xie Hui, and I am a doctoral student in the Department of Scientific and Technological Archeology. The way I approached you this time was a bit reckless, so please forgive me."

"Oh, it's okay, it's okay, so you're looking for me to...?"

"Let's go in and talk."

After entering the restaurant, Xie Hui ordered a Coke for Wu Bin and sat across from him with a cup of milk tea.

"Then I'll get straight to the point." Putting down the milk tea, Xie Hui looked at Wu Bin and asked, "I wonder if you know anything about murals?"

"What kind of mural?" Wu Bin asked.

"Architectural murals, grotto murals, tomb murals, etc."

"Oh ~ I've heard of it, what next?"

"You should know that there is a lot of information recorded in the murals, which are precious treasures in the history of human social development. From the murals at the Shimao site 4200 years ago to the Tang, Song, Yuan, Ming, and Qing dynasties, tomb murals have been found."

"Especially the Tang Dynasty! Regardless of quantity and quality, they are all very good!" Xie Hui's tone suddenly became impassioned.

Wu Bin continued to listen patiently while drinking Coke.

"But now we are facing a very troublesome problem, that is, a large number of tomb murals have many diseases and urgently need to be repaired. Recently, our research has found that graphene plays an important role in the protection of murals!"

'Oh~'

Speaking of this, Wu Bin finally understood the reason why Dr. Xie came to him.

Seeing Wu Bin's understanding expression, Xie Hui went on to say: "Because the structure of the mural mainly includes the paint layer, white ash layer, grass mud layer and brick wall layer from the outside to the inside."

"The main component of the white ash layer is calcium carbonate. So after a long time, the white ash layer is prone to failure, resulting in damage to the surface of the mural, so protection is urgently needed."

"Could it be that there were no protective measures before?" Wu Bin asked curiously.

"Of course there are protective measures. At present, the protective materials for murals are mainly divided into two categories: organic and inorganic materials. However, the compatibility between organic protective materials and murals is too poor, and they are easy to age or even become brittle and yellow after long-term use. This is not what we want to see.”

"At the same time, because the membrane formed by the organic material is not breathable, the mural will eventually swell and pulverize. You must know that this is an irreparable fatal damage to the mural!"

"Oh~" Wu Bin continued to nod, and took out a booklet from his pocket and started to take notes.

Seeing Wu Bin taking notes, Xie Hui seemed a little surprised, but he was more appreciative, so he slowed down his speech a little: "Compared with organic materials, inorganic protective materials like calcium hydroxide are more compatible. , the advantages of anti-aging."

Watching Wu Bin quickly write down a few lines, Xie Hui continued: "After being applied to the surface of the mural, calcium hydroxide will react with carbon dioxide in the air to form calcium carbonate and integrate with the white ash layer, thereby further improving the quality of the mural. The strength of the white ash layer plays a better protective role."

"Huh? Isn't the problem already solved?" Wu Bin raised his head and asked.

"If it was really that simple, I wouldn't have to look for you in such a hurry. What I just said was just a paper published by Kaplan in 2000. In the paper, he wrote that if nano-calcium hydroxide is used to protect murals. Because Due to the size effect of nanometers, the chemical and physical properties of calcium hydroxide will change, the surface activity and stability will be greatly increased, and the protective effect will naturally be significantly improved."

"However, this idea is actually difficult to put into practice—oh no, there are many difficulties."

After a light cough, Xie Hui took a sip of milk tea and continued: "Since the publication of this paper, inorganic nanomaterials have been a new research direction for mural protection materials. However, we have tried the aqueous solution method, alcohol solution method, and microemulsion method. And calcium metal method and other methods to synthesize nano-calcium hydroxide, unfortunately, it doesn’t work.”

Xie Hui said with a sigh, "These synthetic calcium hydroxides are not only too large in size, but also have disadvantages such as poor permeability, poor stability, difficult purification, complicated operation, and high cost."

Wu Bin couldn't help rolling his eyes when he heard this, isn't this just the legendary uselessness...

Seeing Wu Bin's speechless expression, Xie Hui smiled awkwardly and continued: "But our research is not fruitless."

"We found that the problems of slow carbonization of calcium hydroxide and low reinforcement strength have not been effectively solved. Effective breakthroughs in key technologies such as control equipment."

Hearing this, Wu Bin nodded with some understanding, and began to calculate the information in his mind.

"and after?"

"Oh, now our research group has proposed a new idea and wants to introduce graphene quantum dots to solve this problem."

Hearing this, Wu Bin snapped his fingers suddenly and said, "Do you want to use the confinement effect of graphene quantum dot surfactants to regulate the nucleation and growth kinetics of calcium hydroxide?"

Xie Hui was stunned when he heard this, his mouth was open and he didn't know what to say. After a long time, he swallowed hard and said, "I knew I was right to find you!"

"We just want to realize the controllable synthesis of calcium hydroxide nanomaterials!"

"So you want to ask me to cooperate on this project?" Wu Bin asked.

"That's right, I've read your two papers on graphene preparation, and found that your idea is entirely possible to solve our current difficulties, so I very much hope to get your help."

"Okay, I'll join your team!" Wu Bin nodded.

(End of this chapter)