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The magic "artificial snow" - sodium polyacrylate, the volume of water instantly increased hundreds of times

Time of publication: 17:51, October 23, 2019

First of all, let's talk about "artificial snow".

Many friends are concerned about the "artificial snow" in the ski resort Sodium polyacrylate Made with water? The answer - of course not!

The "artificial snow" in ski resorts is made of snow making machines, which are made of pure water. The snow maker first freezes the water into ice, then smashes it, and finally uses cold air to transport the crushed "Snow" to the ski run or field.


Because this "artificial snow" is formed by crushing ice blocks and then blown out by high-speed low-temperature air, it does not have the different crystal shapes of real snowflakes. The "man-made snow" in ski resorts is more like snow beads (actually ice slag), which is spherical or irregular geometry. But this "artificial snow" is made of pure water and can be eaten as real snow if it's not too dirty.

and Sodium polyacrylate On the different, it is actually a kind of organic material with high water absorption and high solubility, and the absorbent resin made of it has extraordinary water absorption performance. This kind of high sodium resin is widely used in baby diapers.


Super absorbent resin made of sodium polyacrylate


Baby diaper

Back to sodium polyacrylate, many friends asked me if I could play with children? My answer is absolutely not!


Structural formula of sodium polyacrylate

Although this device is non-toxic, and its volume expands tens of times or even hundreds of times after adding water. It looks magical and fun, but it is irritating to the skin and eyes. After using it, you need to wash your hands with plenty of water and touch it. And if you eat it by mistake, it will swell with water in the trachea or intestines and stomach, and the consequences are very terrible. For younger children, it is very unsuitable to contact with such chemicals!

In addition, the "artificial snow" made of sodium polyacrylate is similar to snow in appearance, and other physical and chemical properties are completely different from real snow. The most obvious difference is that this "artificial snow" will not melt at room temperature. After water absorption and expansion, sodium polyacrylate has actually combined with water to form a kind of hydrogel with good water retention. Even if you squeeze hard at room temperature, there will be no water outflow.

And after absorbing water, the sodium polyacrylate has good thermal stability. Generally speaking, it starts to analyze the water slowly at about 50 ~ 60 ℃. When it is heated to about 150 ℃, about 50% of the water will be combined with it.

In addition to absorbing water, sodium polyacrylate has many other functions. For example, it can be used as thickener in food, and a very small amount of sodium polyacrylate (content is about 0.05%) is added to bread and canned food; a small amount of sodium polyacrylate can also be used as a water treatment agent in tap water; it is also used in papermaking, medicine and health, which I will not elaborate.


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