Georgetown Researchers Design Effective, Reusable Mask to Fight Airborne Threats
A team of Georgetown researchers are in the running for a $400,000 prize for designing an innovative, lightweight and reusable mask, as highlighted in magazine and .
Department of Physics professor and Ph.D. students James Malloy (G鈥�22) and Christopher Jensen (G鈥�25) are up against 9 other teams, including scrappy start-ups and industry heavyweights like Amazon and Levi Strauss & Co.
鈥淥ur design is a new type of air filtration material based on lightweight nanoporous metal foams that are efficient, breathable, robust, adaptable, cost-effective and can also be cleaned, reused and recycled,鈥� says Liu.
Organized by the Biomedical Advanced Research and Development Authority (BARDA) and the National Institute for Occupational Safety and Health (NIOSH), the Mask Innovation Challenge is poised to help the United States better respond to future airborne threats. The Georgetown team鈥檚 design is one of the most novel concepts for next-generation face coverings to protect against respiratory disease pathogens and was selected from among over 1,400 designs originally submitted.聽聽
Making a New Type of Mask
Liu鈥檚 group transformed copper nanowires into , which are more durable and have the potential to effectively filter out ultrasmall particulates and microbes. These copper foams have wide ranging applications, including .
Last year, BARDA鈥檚 Division of Research, Innovation, and Ventures partnered with NIOSH to launch the 鈥淢ask Innovation Challenge: Building Tomorrow鈥檚 Mask,鈥� which aims to support the development of innovative masks that can protect individuals from respiratory pathogens.
The challenge鈥檚 overall goals are to 鈥渋mprove the comfort, utility and protective capabilities of products that are worn during day-to-day activities by the general public when physical distancing is not possible.鈥�
While competition participants have an eye on future coronavirus surges, the masks have utility outside of the prevention of COVID-19 as they have been shown to reduce the transmission of other respiratory infections such as the flu. They also provide protection against air pollution, especially for immunocompromised groups.
Currently, the gold standard N95 face masks are difficult to decontaminate and reuse. Their polymer fibers rely on electrostatics, which discharge over time, significantly decreasing the filtration efficiency. The sheer volume of the waste face masks generated during COVID-19 also poses significant environmental challenges, due to the long time it takes for polymer-based materials to decompose.
The created by Liu and his team of researchers are 鈥渓ight as a feather鈥� and actively filter particulate matter. have shown that the foams exhibit excellent filtration efficiency for most of the submicron-sized particulates, especially relevant for combating COVID-19 and air pollution.
鈥淭he foams can be readily integrated with other mask designs, either as the filtration media themselves, or as inserts or cartridges,鈥� says Malloy. 鈥淥ur design can also accommodate additional air cleaning mechanisms.鈥�
In the second phase of the challenge earlier this year, the team submitted prototypes that were judged on filtration, fit, comfort and ease of manufacturing
This competition is designed to support the development of mask designs that meet defined performance standards while also overcoming barriers to use. Overall, there is a need to develop better designs, materials, and technologies that are more acceptable to wearers and that ensure quantified measures of performance.
Last year Liu and the Georgetown team were selected as a of the competition.