The bubbles that survived for 465 days can be used to cure diseases?

The colorful and light floating bubbles under the light always attract people's attention, but the beauty is always fleeting. It dissipated like smoke in time. Many people must have had this question: Is there a bubble that won't burst?

▲ Picture from: Daily Toutiao

There is now a new answer to this question: researchers such as Aymeric Roux of the University of Lille in France have created bubbles that can survive up to 465 days – "gas marble" (gas marble), a composite liquid membrane The resulting bubbles maintain their integrity in standard atmosphere for more than a year.

In 2017, research from the University of Paris East (UPE), which explored the properties of gas marbles, showed that plastic beads wrapped in a bubble shell can make them strong enough to even be held in the hand or rolled along a surface. , but did not explore their longevity.

▲UPE research, picture from: APS Physics

According to information presented at APS Physics (American Physical Society), Aymeric Roux's team at the University of Lille, France, studied bubbles known as "gas marbles," which are typically made from a liquid solution containing plastic beads, The layered shell structure of plastic particles, glycerin and water gives it a longer lifespan.

In the experiments, the team studied three different types of bubbles: traditional soap bubbles, water-based gas marbles, and water-glycerol-based gas marbles. The results, monitored with a balance and camera, were that the soap bubbles survived for about a minute before bursting, and the water-based gas marbles lasted a little longer, about 6 to 60 minutes. At sufficiently high concentrations of glycerol, the water-glycerol marbles remained intact for significantly longer, with the longest-lasting one surviving 465 days after being made.

▲ Research by the Aymeric Roux team at the University of Lille, picture from: APS Physics

Generally speaking, there are several reasons why bubbles are fleeting in the atmosphere: gravity causes material to lose material from the inner wall and membrane of the bubble; the evaporation of liquid causes the bubble wall to thin, and the tiny dust in the air destroys the whole of the bubble. stability.

In the paper submitted by the team, the study showed that covering the outer shell of the bubble with microparticles suppressed gravity-induced drainage, while further addition of glycerol resulted in a steady state in which the evaporation of water was offset by the hygroscopicity of glycerol. This allows the bubble to maintain its integrity in the standard atmosphere for more than a year without a noticeable change in its radius.

That is to say, glycerol, which has a strong hydrophilic force, absorbs water from the air to compensate for the evaporation of water, and the existence of shell particles prevents water from being discharged from the wall. The structure of this "gas marble" just neutralizes The unfavorable factors that will affect the lifespan of the bubbles, thus creating the bubbles with "extremely long standby time".

▲ Research by the Aymeric Roux team at the University of Lille, picture from: APS Physics

Many scientists have novel ideas for the application of this new material. Some people think that it can be used to store radioactive tracer gas for medical imaging or to deliver scents as needed. Others think it could be used in sprays or aerosols to keep the drug in the air for longer. However, according to researchers from the University of Lille, the new material has undiscovered physical and chemical properties, so there is no introduction to the actual use of the "gas marbles".

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