Li Mengxi took the transparent lampshade over. He didn't cherish the lampshade worth nearly 100,000 yuan at all. He directly cut the lampshade into pieces with scissors.

The shape of the lampshade was very different from the shape of the lens, so Li Mengxi wanted to see if he could melt it and put it back together again.

Find a small urn, put the lampshade in, and light a fire to cook.

During the cooking process, Li Mengxi performed other tests. He picked up a fragment of the lampshade and lit it with fire. Immediately, the fragment was charred, giving off a scorched lake smell like burning feathers.

As expected, the material of the lampshade is really something like gum.

The verification was successful, and Li Mengxi randomly started more tests. He went to the craftsman camp and the military medical camp respectively. From the craftsman camp, he asked the craftsmen for skin glue, bone glue, fish glue, various kinds of glue, and asked the military doctor for peach tree gum, ton tree gum, pine gum, etc.

Medicinal glue.

Collecting more than twenty kinds of glue, Li Mengxi knew that resin could be used as lenses. The only thing he knew about resin was the two words in its name.

Li Mengxi tried to deduce the technical details from the name. [Resin] and [Tree] pointed out the source of the material. The material came from the tree, while [Resin] pointed out the properties of the material.

What is grease? Fat, grease, grease is grease, gum is glue, are glue and grease the same thing? Li Mengxi couldn't help but wonder.

The first question arose. Li Mengxi was not sure whether gum and resin were the same thing. If they were the same thing, then the gum could be purified and refined into lenses.

If gum and resin are not the same thing, then there are two situations. One situation is that you have to find a tree that can produce resin to obtain the resin. The other situation is that although gum and resin are not the same kind of substances, they are

can be converted chemically, that is, gum can be processed into resin.

Due to limited conditions and no other materials available, Li Mengxi could only start with the materials on hand.

As the first step to explore gums, Li Mengxi wanted to purify various types of gums.

I don’t know what substances peach tree gum, poplar gum, toon gum, pine gum, etc. all belong to.

All I know is that no matter it belongs to a substance, as long as it belongs to a type of substance, then it will either be soluble in acid, soluble in alkali, soluble in alcohol, soluble in grease, or soluble in other substances. In short, it will be soluble in something.

among species.

At the same time, other substances other than glue in glue are impurities. Impurities are also soluble in acid or alkali, etc.

From this point, the principle of different solubility is used to remove impurities.

The substances Li Mengxi currently has on hand include extremely pure alcohol, which is alcohol, extremely pure white vinegar, which is acid, and extremely pure alkali.

More than 20 kinds of gums were tested simultaneously. In the first step, spirits were added to various gums and then heated at low temperature. In the second step, white vinegar was added. In the third step, strong alkali was added.

To speed up the reaction, all tests were heated at low temperatures.

After a while, Li Mengxi discovered that after adding strong alcohol, among the gums, the toon gum and rosin gum were soaked and discolored. After adding acid, the toon gum was also decolored. After adding a strong alkali, many gums were boiled and melted.

opened.

Li Mengxi realized belatedly that he had tried to boil papermaking materials with strong alkali before when making paper, and the grass and wood fibers were very dispersed. It seems that glue and strong alkali cannot be put together.

The only high-purity materials in Li Mengxi's hands were spirits, white vinegar, and strong alkali.

Then, boil the glue in water and boil the glue in oil. Because I am afraid that the ingredients of the glue will be destroyed when heated, I only cook them at low temperature.

Half a day later, Li Mengxi miraculously discovered that more than 20 kinds of glue had been boiled in oil. After cooking for a long time, the glue was gone. It was really not at all. It was completely dissolved in the oil. It was obvious when you picked it up.

not see.

That is, the colloid is dissolved in the oil.

Li Mengxi used his limited knowledge to make a judgment. He speculated that based on the principle of fusion of similar substances, fish glue, skin glue, gum, etc. should belong to lipids.

After testing, Li Mengxi preliminarily determined the purification method of gum. The first step of gum purification is physical purification, filtering to remove solid impurities in the gum, then adding alcohol to remove some of the impurities, adding acid to remove some of the impurities. According to the test

The phenomenon is that when alcohol and white vinegar are added to gums such as toon gum, peach gum, and the like, the color is revealed.

From the needs of making lenses, making lenses needs to be made of colorless and transparent material, and this step of removing colored impurities is extremely necessary.

After that, Li Mengxi was busy for a few days, and he selected the most transparent and pure tonkin gum. The tonkin gum was soaked and boiled in spirits and white vinegar, and the color became more transparent.

In the last step, when Li Mengxi wanted to boil the toon gum in butter, he felt embarrassed.

Other solutions, such as spirits, white vinegar, alkali, etc., are all highly pure things. Only oils and fats have not been able to obtain any pure oils for such a long time.

Li Mengxi simply stopped the further purification steps. He directly took some of the purified toon gum and pressed it into the mold, preparing to directly press out the shape of the lens.

The next day, Li Mengxi inspected the results. He saw that although the toon gum had indeed been pressed into a round piece and looked pure and transparent, when he took a look at it, he found that he could not see it at all.

Clean things.

The test failed, and the gum was not transparent enough to make lenses.

Having reached a dead end, Li Mengxi felt depressed.

The sound of cheerful footsteps sounded, and Xiao Bian came back from school.

Xiao Bian saw many bowls placed on the low table in front of Li Mengxi. Xiao Bian thought they were delicious, so he ran over and took a look at them, but the bowls didn't look like they were delicious.

"Brother, what is this?" Xiao Bian asked curiously.

"It's toon tree gum." Li Mengxi replied.

“What is Tsubaki gum?”

"That's right, the glue that flows out of the Chinese toon tree is soft and can be kneaded into a ball..."

Children always have different concerns. Li Mengxi said that tonko tree gum can be kneaded into balls, and Xiao Zhuan thought that tonkin gum was fun. He pulled Li Mengxi and asked Li Mengxibao to find a tonko tree and remove the gum.

This chapter is not finished yet, please click on the next page to continue reading the exciting content! Li Mengxi raised his head and looked outside, "No, little brother, it seems that the chun trees only have glue in the summer. It is autumn, and there is no glue."

There was confusion on Xiao Zhuan's face. He tilted his head and thought, "Brother, why do we only have glue in summer?"

"This..." Li Mengxi was speechless and couldn't answer. He smiled and touched his brother's little head, "Guess why there is no glue in summer."

Xiao Zhuan thought about it seriously, "Is it hot in summer? Does it have to be hot to get glue?"

It seems to be related to the climate. The summer is hot, so there is glue. Li Mengxi speculated that it is a complex biological mechanism, climate and other complex factors.

But Xiao Zhuan thought very simply. Xiao Zhuan thought, since there is glue when it is heated, bring a tree over and burn it, and the glue will come out.

Xiao Zhuan became very curious and insisted on trying to see if he could burn out the glue. Li Mengxi had no choice but to help.

Li Mengxi took the trouble to ask someone to go outside and fold a few twigs, then handed them to Xiao Zhuan and let him toss them.

Li Mengxi helped Xiao Zhuan light a fire, and Xiao Zhuan clumsily put the wet toon branches on the fire to bake. When the branches that had just been broken off the tree were roasted by the fire, white smoke immediately appeared from the broken branches.

Floated out.

"Wow!" Xiao Bian was so surprised that he tried to grab the cigarette with his little hands, but all the smoke flowed away from his fingers.

Xiao Bian turned around and asked Li Mengxi for help, "Brother, can you get me a bowl?"

"Okay!" Li Mengxi agreed with a smile.

When the bowl was brought, Xiao Brick had the tools, and he happily took the bowl to catch the smoke that escaped from the wood.

A strange phenomenon occurred. Li Mengxi originally thought that smoke was weightless and ethereal, and could not be caught in a bowl.

Then he watched for a while and miraculously found that the smoke was like water flowing through the small bricks and filled the bowl.

Li Mengxi couldn't help but go over and take a look.

"Brother, look!" Xiao Zhuan raised the bowl and showed Li Mengxi the beautiful smoke caught in the bowl.

Li Mengxi couldn't help but blow a bit, and all the smoke flew away.

This is causing trouble.

Xiao Zhuan was about to cry. He looked at the empty bowl and felt extremely aggrieved. "You've ruined the wood by leaving me alone. You should pay for it."

Li Mengxi quickly admitted his mistake.

In order to help Xiaozhuang "catch" more cigarettes, Li Mengxi went to get a set of special equipment. He got a large jar with a tightly sealed wooden stopper. An iron pipe was inserted into the wooden stopper, and then the branches were

Stuffed into an iron pipe.

In this way, all the smoke produced when the branches are burning flows into the jar along the iron pipe.

The silly brother was deceived. Li Mengxi lied to Xiao Zhuan and told him to catch more cigarettes and see if he could raise them for fun. The younger brother actually believed it. He really believed that cigarettes could be raised.

In order to get more smoke, Xiao Bian excitedly looked for branches everywhere.

Not long after, Li Mengxi saw that there was too much smoke in the can and it began to flow out.

The silly brother also noticed this. He saw that the cigarette he had worked so hard to make was about to run away, and he hurriedly wanted to come over and cover it.

Li Mengxi got some water and directly added half of the water to the jar, and the smoke stopped.

Xiao Zhuan opened his eyes wide and asked worriedly whether the cigarette would drown if he poured in the water. Li Mengxi was amused by this innocent and cute question.

"Probably not." He replied, touching his brother's head.

This meaningless game ended in the evening.

Back at the city lord's mansion, Li Mengxi and his brother opened the can and checked the collected smoke.

The smoke has disappeared, and the water in the jar is dark.

Xiao Zhuan was extremely puzzled and asked where the cigarette had gone.

"Look for it." Li Mengxi said while suppressing a smile.

This is actually a question worth exploring. Just like the question of why an egg hatches a chick, where does the smoke go after it comes into contact with water? This question hides the material form, temperature, microscopic level, etc.
To be continued...