frightfiction Chapter 336 Batch 1 Starch Plastics
Chapter 336 Batch 1 Starch Plastics
As for the extraction of glycerin, under the existing conditions, the simplest method is the extraction of animal and plant fats.
For example, Shen Youyou used lard this time, as palm oil has been almost consumed, and no one has made soybean oil yet.
However, making soybean oil must be put on the agenda soon, after all, the cost of lard is too high.
She saponifies the oil with alkali and mixes it together, a process that produces soap and glycerin.
After the saponification reaction is completed, the resulting mixture contains unreacted oil, soap, water and glycerin.
At this time, Shen Youyou carefully poured an appropriate amount of clean water into the earthenware jar containing the saponification reaction mixture, and then gently stirred it.
Then she took out a tea boiler and slowly heated the clay pot, keeping the temperature between 60 and 100 degrees Celsius.
When the time is right, add alkaline noodles decisively. These additives can effectively promote the hydrolysis reaction, causing the originally calm mixture to begin to undergo miraculous changes.
She continued to stir the mixture patiently, making sure every part was fully in contact and reacting. The hydrolysis reaction gradually became more intense, gradually breaking down the remaining oil into fatty acids and glycerol.
Over time, the response leveled off.
At this time, you can see a layer of transparent liquid floating on the surface of the mixture, which is the glycerol aqueous solution.
The solid part is soap.
She used the filtration method to separate the glycerol aqueous solution from the solid soap and successfully obtained pure glycerol aqueous solution, the so-called crude glycerin.
However, crude glycerin cannot be used directly and needs to be further processed into pure glycerin.
Shen Youyou stood up and fixed the small jar used for distilling liquor, and used saltpeter to make ice to cool it. He had done this countless times when refining alcohol and salt. Any boy from the Nine Clans could do it, and it was not difficult at all.
Crude glycerin is distilled to remove water and other volatile substances through high-temperature evaporation.
However, in order to make the glycerin purer and more transparent, it is finally decolorized with charcoal.
After half a day's work, she had almost finished using up all the lard. Now she had temporarily placed the glycerin in several small jars.
But glycerin needs to be sealed, and she can't make a mold to make a plastic bottle for the time being, but it is still possible to make some plastic cloth.
Shen Youyou slowly poured an appropriate amount of starch into the jar of distilled water that had been distilled and cooled, and then gently stirred it until the two were completely blended.
Then add a little alkaline substance and continue stirring.
With constant stirring, the originally slightly thin liquid gradually became viscous.
Then she skillfully added a few drops of white vinegar, stirred it evenly again, and then slowly poured in some glycerin.
Every movement is so precise and delicate, without any drag.
Now, changes have taken place inside the jar - the originally white mixture has gradually become transparent and clear, similar to lotus root soup.
At this time, the lotus seed powder is very plastic. As long as you are not afraid of heat or have a mold, you can squeeze them into a soft and round shape.
Shen Youyou first arranged the sole molds that had been used before separately. She placed straw soles on several pairs of sole molds, and there were also several pairs with nothing on them.
There are two pairs left, and Shen Youyou plans to make two special pairs to open his father's eyes.
She first stood up and poured the prepared soft plastic into the mold that already had straw shoes in it and the mold that did not have straw shoes in it.
Then she poured half of the remaining two pairs of molds, put some dried purple kudzu flowers in them, and then poured the other half.
Wrap the purple dried flowers in transparent plastic. It would be even better if the flowers are freshly bloomed, so that you can create a flower-blooming effect.
Shen Youyou got to work right away. She used a stone mortar to crush some purple kudzu flowers into purple powder, and then found some wood to carve flower molds herself.
However, this kind of technical work is still somewhat difficult. With two small cuts on her hands, she was only able to carve out a small mold that looked like a flower, and another mold that looked like a five-pointed star.
"It seems like we can only make do with this. My uncle will have to take care of the mold later."
She made the liquid plastic again, but added some purple kudzu flower powder into it at the end, and stirred it gently to make it even. The originally colorless and transparent liquid turned into a purple and transparent liquid.
Shen Youyou carefully added the purple transparent liquid into the mold and waited for it to cool and take shape. At this time, the soles made earlier were almost formed.
The effect was good, but she found that she had almost finished using the starch made from corn, and it was impossible to make more soles.
After all, you have to make the plastic sheet first.
She chose the simplest method to make the plastic sheet, which was to pour the plastic liquid on an iron plate made by Uncle Tietou, and then cover it with another iron plate.
In fact, the best thing would be to put a big stone on it, but she couldn't move it.
You can only use adobe bricks to press it, but if the weight is enough, you need to stack many bricks.
This time, when making the plastic liquid for the plastic sheet, she adjusted the ratio of water and starch to make it thinner.
After only a little pressure, she moved the adobe pieces away, but the effect was good, and the plastic sheet was done.
The only shortcoming is that the plastic plate made by Uncle Tietou is still not smooth enough, after all, it was hammered repeatedly.
If you touch the plastic sheet gently, the thickness will vary.
It seems that we are trying to find a way to copy steel and make molds for casting.
When she is doing an experiment, she is usually in a state of selflessness and is very devoted. Shen Zhiqiu and Li Jingshu are used to it.
But Old Mrs. Hua was not used to it. Shen Youyou was busy all day and basically did not leave the house. The only time she went out was to move adobe bricks, and she left and came back in a hurry.
They didn't even have time to eat lunch at noon. Old Lady Hua complained to Li Jingshu, "How can you be a mother? Let her eat first and then do anything else?"
Li Jingshu was helpless: "She is like that. It's no use calling her now. She will come out when the corn starch is done."
Anyway, there wasn't much corn starch made before, so there was no way to use more even if I wanted to.
Shen Zhiqiu didn't have time to come back for lunch at noon. After all, every household in Tangjia Village grows some sweet potatoes, and after a few families have harvested them today, there are still others left.
Mr. Tang Sanye's family had a total of six acres of land, and they harvested about 800 kilograms of sweet potatoes from each acre. They kept one acre of sweet potatoes for themselves and sold the rest to Shen Zhiqiu.
The price is one cent per pound, and it’s the same for other shops.
Because someone had inquired about this, many grain merchants joined forces to lower the price, charging two kilograms for one cent.
When Shen Zhiqiu heard this, he thought it was a good thing, so he quickly called Shen Mazi and a few other men.
Go to the surrounding villages and tell them that Tangjia Village charges one cent per pound, but the demand is limited, so first come first served, and then the goods will be taken to Tangjia Village.