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Deng Ziqi has a song "Bubble" Bubble (which also means bubble). You may have heard a passage with lyrics like this:

Beautiful bubble, although in a flash, all your promises are too fragile, but love is like a bubble, if you can see through …...

In short, the meaning of this song is very simple: love is like a bubble, very fragile, easy to break.

But in fact, if Deng Ziqi said that the bubble is this kind of bubble that does not burst for more than a year, then the love is quite tenacious.

Why do soap bubbles explode easily? If you just blow with water, you can't blow bubbles all your life. But as long as you add soapy water to it, you can blow a spherical bubble.

This is because there is a molecule called surfactant in soapy water, specifically a substance that is soluble in water and can significantly reduce the surface energy of water. In addition to soapy water, there are also surfactants for all kinds of cleaning, emulsifiers, lubricants, Solubilizers, etc.

The molecule has unique ends, one end is a hydrophilic polar group that can stick to water all the time, and the other end is a hydrophobic polar group that doesn't like to stick with water.

A bubble is like a ball made of a thin film, which has two sides, one facing outward, connected to the atmosphere, the other facing inward, and connected to the internal gas.

At this time, the hydrophilic end of the surfactant is hidden in the water, and the dislike end of the water is on the surface. You can imagine the film as a layer of water in the middle and a sandwich of surfactant inside and outside.

Due to gravity, the water in the top layer always flows downwards, which causes the film on the top layer to become thinner and thinner, at most dozens of nanometers. At this time, a little disturbance, such as needle piercing or wind blowing, will wrinkle the film.

At this point, the surface tension changes, the sandwich cracks and the bubble explodes.

How to prolong the survival time of bubbles? Therefore, if we want to make the bubble time longer, we have to slow down the flow of water, and the way to slow down is to increase the stickiness of the bubble.

Well, that's what some scientists did.

In 1969, a scientist A. V. GROSSE added some organic polymers, such as polyvinyl alcohol or polyoxyethylene, to the bubble solution to increase the stickiness of the bubble, creating a super soap bubble with a diameter of more than 60 centimeters and a volume of 100 liters that did not explode for more than two years. But the premise is clear, there is no disturbance from the outside world, and such bubbles have to be made in the laboratory.

However, I couldn't find the photos at that time, so I had to attach the form in the literature.

Recently, some scientists have created a super bubble with a radius of 3.7 mm, but this bubble feels like cheating.

The surface of the bubble is covered with plastic particles and glycerol is added. Well, the white hemp ball...

Bubbles survive for 465 days under natural conditions, 200000 times that of ordinary soap bubbles.

In the end, the cause of the explosion is different from that of ordinary bubbles, which is broken by the growth of microbes.

The production method is attached here. Step 1: mix glycerin with water, place it on a flat plate, and sprinkle it with wet plastic particles.

Step 2: inject air into the solution with a needle and blow out bubbles.

Step 3: then roll the blown bubbles on the plate and let the particles cover the bubble surface.

The great task has been completed! Bubble, no, as long as it doesn't move, it won't explode casually, and the long-lived hemp ball bubble will blow out.

Seriously, this bubble is really like a hemp ball.

Reference:

Https://shop1722950468.v.weidian.com/?userid=1722950468&spider_token=bbb3

This article is from the official Wechat account: bring Science Home (ID:steamforkids). By Su Chengyu.

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