75 alcohol has a strong bactericidal effect, and Li Mengxi knows this very well.

But at the same time, shortcomings also appeared.

Li Mengxi, like Tian Bu, wore a thick cloth mask with strong alcohol sprinkled on it.

At first, Li Mengxi didn't feel it yet.

After a while, the alcohol on the mask continued to penetrate into his nostrils with his breathing. Li Mengxi felt that his nose was burning and very uncomfortable.

A sore nose is nothing compared to catching the plague.

It's so uncomfortable.

Li Mengxi couldn't help but wonder if there was any better way to protect against viruses, and he thought of activated carbon masks.

What the hell is activated carbon? Li Mengxi can't remember the detailed definition. What he can roughly remember is that he learned in chemistry class that the microstructure of charcoal is loose and porous and can absorb impurities, so it is often used as a filter material for water or air.

The experiment in the chemistry class was to drop a few drops of red ink into the water, and the water turned red, and then threw in a few pieces of charcoal. After leaving it for a period of time, the color of the water became lighter.

This is because charcoal absorbs impurities in the water.

Based on this principle, when the activated carbon in the gas mask comes into contact with germs in the air, it adsorbs the germs.

Li Mengxi couldn't remember the difference between activated carbon and carbon.

Carbon also has adsorption properties.

If there is no activated carbon, you can also use carbon.

But, how to combine charcoal with masks?

It seems that the so-called activated carbon masks use a very precise processing technology to press activated carbon into the sandwich layer of fabric, so that the mask has the function of filtering germs.

Under the current conditions, it is too difficult to press charcoal into fiber materials.

To use carbon to make protective equipment, there may be only one idea that can be realized, which is to make filters.

That is, make a breathing mask with a long tube inserted into a sealed bottle. The bottle contains many charcoal particles, and there is a small opening at the bottom of the bottle mouth for air to enter and exit.

In this way, when a person breathes, the air first passes through the charcoal layer, and bacteria and other things are adsorbed, and the person is safe.

Even in the 21st century, when technology is extremely advanced, the adsorption and filtering materials of gas masks and chemical protective masks are still just activated carbon.

The activated carbon filtration effect is amazing.

Thinking about it this way, Li Mengxi felt that it was not difficult to do.

Charcoal is easy to find. Just put the charcoal in a jar or any clay pot or jar.

It is easy to seal the duct. Fish glue can be used to seal it. If it doesn't work, just use paint. After applying the paint, apply tung oil to ensure it is tight.

The catheter is a difficult problem, but not too difficult.

Leather is fine, animal intestines may be fine, but if not, metal cast iron pipes will work.

Composite materials can also be used, that is, long pipes are sewn with cloth, and then painted with several layers of tung oil or paint. If the tung oil can be dense enough to isolate the air, it can be used as a conduit for protective equipment.

When it comes to the mouth and nose, the difficulty is a little higher. The respirator must be made of leather or cloth coated with tung oil, but how to apply it tightly to the mouth and nose.

Li Mengxi frowned and thought for a long time. He thought of the isinglass used in the carpenter camp when making osprey boats.

When it comes to sealing a respirator, the materials and technical conditions are limited, so it can only be glued firmly onto the face without any gaps.

When his thinking was mature, Li Mengxi suddenly stood up and walked away.

Military doctor Tian Bu raised his head and glanced at Li Mengxi in surprise, thinking that something was wrong with Li Mengxi.

Afraid of losing his inspiration, Li Mengxi hurried back, took out his pen and ink, and recorded his inspiration.

"Using alcohol to soak a thick cloth as a protective mask will cause alcohol to burn the nasal cavity. Moreover, the mask is not strictly protective and is not completely safe.

Chemical protective gear can be made.

Protective gear is divided into three parts: mask, catheter, and filter bottle.

The mask can be made of leather or cloth coated with tung oil. When in use, use isinglass and other materials to make the respiratory mask close to the skin to prevent any leakage.

As for the conduit, livestock intestines can be used, or the seams can be coated with tung paint glue. Third, cast iron pipes can be used.

The catheter is introduced into the filter bottle. The filter bottle is sealed with isinglass or paint. Half a bottle of crushed charcoal is placed in the bottle. An air inlet is left at the bottom of the bottle. The air inlet is covered with a mesh or coarse cloth so that air can enter but the charcoal cannot.

out.

In this way, even if protective equipment is added to the body, even if the plague is around, and the air around the body is full of germs, no one will be harmed.

Charcoal can be used as an alternative to activated carbon.

However, charcoal is not the same as activated carbon. How to make activated carbon is absolutely difficult.

However, activated carbon has many uses. It can be used as a filter element to purify water sources, as an epidemic prevention tool, and can be used for decolorization and impurity removal, etc.

If you have free time, you should trial-produce activated carbon."

After finishing writing, Li Mengxi looked up at the sky. The stars were bright at night, and he could hear the shouts of the recruit instructors not far away.

After being in a daze for a while, Li Mengxi jumped out of the car and went to look for his younger brother. He was left in the women's and children's camp, playing with the children. It was time to go to bed.

On the other side, Tian Bu and a dozen or so military doctors were busy. There were too many prisoners and few manpower, so they were bound to be busy until late at night.

It was the turn of an old man. The old man was shivering and his teeth were chattering due to the cold. Tian Bu took his pulse seriously, then asked about his condition, and then smiled confidently.

"Uncle, I don't dare to vouch for other illnesses. Your hot and cold illnesses can be cured by medicine. You can be cured with just a few doses of medicine in three to five days."

Tian Bu was very conceited, saying that a disease with one cold and one hot could be cured by medicine.

Behind him, a young man with a long scar on his face looked fierce. Qing Zhuang was thoughtful and secretly remembered Tian Bu's words.

After a while, the old man suffering from cold and fever passed by. Tian Bu called to the helper, "Go and make medicine. Don't use hot water. Use cold water and filter it."

The fierce young man with a long scar on his face couldn't help but turn his head to look. Not only could he see what the disease was, but he could also find the right medicine.

Qing Zhuang came forward, Tian Bu took out the wine bowl, flicked his fingers a few times, and flicked away the wine drops on his hand.

"Come on, stretch out your hand." Tian Bu said.

Qing Zhuang stretched out his hand absently and put it on the low table, but his eyes followed the old man suffering from cold and fever who had just walked away.

After checking his pulse for a moment, Tian Bu stopped and said, "That's it. I don't think you're in any serious condition. Go to the side. There's hot licorice soup. Drink two bowls..."

"Should we let my father come over to see a doctor?" Qing Zhuang interrupted Tian Bu and asked directly.

This young man with a ferocious face, without any malice, charged forward with a certain degree of discomfort.

Tian Bu was stunned for a moment, glanced behind Zhuang, and asked, "Where is your father? If he is sick, bring him, and I will take a look right now."

Qing Zhuang said nothing and stared straight at Tian Bu, "Can you cure cold and fever diseases? Are you kidding me?"

Tian Bu was all happy. The cold and heat disease was called malaria by military advisors, who said it was a disease caused by mosquito bites. Military advisors had been able to eradicate malaria with the juice of Artemisia annua, so why couldn't it be cured?

Tian Bu laughed and said, "I can cure cold and fever diseases! If it can't be cured, I will give you my head!"

The fierce-looking Qing Zhuang stared at Tian Bu for a long time, then turned and walked away.
Chapter completed!