LG PuriCare Wearable Air Purifying Face Mask. Free Technical Library News

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LG PuriCare Wearable Air Purifier Face Mask

30.08.2020

The COVID-19 pandemic has forced many people to wear masks in many situations that require social interaction. In such conditions, LG decided to create its own mask called PuriCare Wearable Air Purifier. It will clean the air inhaled by the user, while minimally affecting his breathing.

The LG PuriCare Wearable Air Purifier uses two H13 HEPA filters. They are almost identical to the filters that LG uses in its household air purifiers. If necessary, they can be replaced. The mask also contains two built-in fans that can be adjusted in three speeds to make breathing more natural. They will speed up to push more air in, and as you exhale they slow down to offer less resistance.

The announced mask is an electronic device equipped with a battery. According to the manufacturer, the mask can operate from 2 to 8 hours on a single battery charge, depending on the mode used.

The package includes a charging case, which is additionally equipped with ultraviolet light emitters. This allows you to destroy germs that can get inside the mask. In addition, the case is able to determine when the filters need to be replaced. In such cases, a corresponding notification is sent to the application on the smartphone.

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The new material melts in the dark and hardens in the light. 17.07.2019

An international team of researchers from Australia, Belgium and Germany has developed a material with unique changing properties.

Molecules-triazolindiones, as well as naphthalene, are responsible for the unusual property of the material. Under green light, they allow the material to remain solid, but in the dark, their chemical bonds begin to break down, and the entire polymer becomes soft and fluid. To restore its hardness, it is enough to turn on the green light again.

According to the researchers, their discovery is unique. For materials with variable properties that exist today, the switches are more intense physical stimuli—for example, exposure to a certain length of light, harsh chemicals, or exposure to heat.

However, in this case, the opposite is true: the green LED stabilizes the polymer chains, while the darkness destroys them.

The team members hope that other "light stabilized" materials will follow the first discovery. They are especially promising in 3D printing, where they can be used as a base for a wireframe and then removed by simply turning off the light.

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