Prototype of the self-disinfecting mask with USB cable
Prototype of the self-disinfecting mask with USB cable

Image source: Israel Institute of Technology

COVID protective equipment

Face mask disinfects itself via USB cable

A self-disinfecting reusable protective face mask was developed at the Israel Institute of Technology (Technion) faculty of Materials Science and Engineering.

The disinfection process occurs when a layer of carbon fibers in the mask is heated using a low current source, such as an electric mobile phone charger, the developers state. A patent application for this invention has been submitted in the United States.

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Infra-red heat map of masks of the proposed variety, at various temperatures. The hot areas (yellow and red) indicate where the carbon fibers heat up to provide coverage.

Image source: Israel Institute of Technology

Due to the coronavirus pandemic, demand for protective face masks has sky-rocketed in recent months, as wearing masks is now a requirement along with social distancing and hygiene measures. A wide range of masks is available, with the leading model being the N95. The authorities insist on the correct usage of masks, which means replacing it daily even if it is kept clean and dry during the day. These regulations, along with the urgent need to provide masks for the medical staff caring for coronavirus patients, has led to a surge in demand for these masks and a search for manufacturers and suppliers. In the U.S., for example, approximately 3.5 billion masks are required in order to protect against an acute epidemic – 100 times more than the number of masks readily available. An immediate shortage of masks also occurred in Israel and was accelerated when the Ministry of Health announced that mask-wearing is mandatory.

Prof. Yair Ein-Eli, Dean of the Faculty of Materials Science and Engineering, developed a reusable face mask that can be heated in a controlled manner – a process that destroys viruses that accumulated on the mask and renders it reusable. The new technology is based on an inner layer of carbon fibers spread within the mask in a homogeneous manner. When the layer of fibers is heated using a low current (2 amps) from a readily-available source – such as a mobile phone charger, USB connection or other mobile electronic device chargers – the viruses are destroyed. Prof. Ein-Eli’s research group created the mask prototype and tested it together with Prof. Debbie Lindell and Prof. Oded Beja from the Faculty of Biology. A patent was submitted in the U.S. on March 31 and the research group is currently discussing commercialization with industrial companies.


Source: Israel Institute of Technology (Technion)

30.05.2020

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