A self-setting filter is created that does not transmit bacteria and gases

Mechanical engineers from the University of Pennsylvania created a liquid membrane that skips large objects and delays small ones. The material is independently restored, stabilizes, has many properties of the cell membrane and is the exact opposite of the usual filter.

The simplest example of the filter is a sieve. If it is saturated with sugar and peas in it, it delays larger objects. The invention of scientists from Pennsylvania works on the contrary. The principle of the liquid membrane is based on kinetic energy, which is usually proportional to the size, which makes it possible to achieve the necessary reversing effect. After passing the object, the form is completely restored like a layer of surface tension on the top of the glass.

The liquid membrane externally resembles a normal ring for the inflation of soap bubbles. It is based on water and many other components, and the first prototypes partially consisted of soap. In the process of further research, the content was strongly changed. Due to which the membrane now has become stronger, and also received antibacterial properties and the ability to neutralize the smell. Now it can function for a long time and even blocks certain gases.

The team believes that the invention can be used in the process of surgical intervention to protect against infection. This is especially important in the areas of natural disasters or in combat areas, where there may not be special premises for operations.