CIT receives COVID-19 Rapid Response Funding for Barrier Masks
Published on: Thursday, 24 September 2020
CIT is delighted to announce it has received funding from Science Foundation Ireland (SFI) for research into barrier masks to tackle the ongoing COVID-19 pandemic. CIT staff have already conducted initial research on the effectiveness of barrier masks in conjunction with the National Standards Authority of Ireland (NSAI). As a result of this work, they were then appointed part of the Irish Delegation for the European Committee for Standardization (CEN).
The project titled MASK focuses on Making Aerosol Safety Known. The aim of the project is to quantitatively determine how well commonly available face mask materials supress the transmission of exhaled droplets. Given that the reproduction rate of COVID-19 is linearly related to both the efficacy of a mask and the percentage of a population wearing masks, a small change in either makes a large change in disease transmission rates. It is therefore critical that large-scale mask usage, will involve optimally suppressive materials that are comfortable to wear for extended periods, can be produced in large quantities and are re-usable and inexpensive. Importantly such masks will not negatively affect medical supplies.
The project will use imaging techniques to directly measure the range of droplet sizes that penetrate the materials under examination. This direct imaging approach improves upon many other studies and is capable of single droplet detection and sizing from at least the five-micron threshold level and with no physiologically significant upper threshold. The project approach will measure the brightness of each droplet exhaled by participants through face masks composed of different materials as they pass through a light curtain generated by a laser. Using high-speed photon-counting imagers and a photometry reduction pipeline, previously developed for an astrophysics context, the team will be able to deal with overlapping and non-spherical point sources and extend the dynamic range of brightness which can be analysed. By repeating the experiment for different materials, the team will rapidly obtain an accurate estimate of the differential absorption of these materials as a function of droplet volume.
This research involves a multidisciplinary approach and brings together researchers from a variety of research departments in CIT including Blackrock Castle Observatory (BCO), the Centre for Advanced Photonics and Process Analysis (CAPPA), the BioExplore Research Centre, and the MEDIC Design Group. Andor Technologies, Belfast, is sponsoring a state of the art high speed imaging camera, continuing a long association with BCO and CAPPA.
Dr Niall Smith, CIT Head of Research and Head of BCO who is leading the project says, “The team are delighted to take a technique developed at the Blackrock Castle Observatory to measure the brightness of stars with ultra-high-precision and apply it to a completely new domain. This is an excellent example of a transfer of knowledge originally developed to improve our fundamental understanding of our universe to a practical understanding of the effectiveness of different mask materials and designs. The results will be useful not only during COVID-19 but also to assist with suppressing other airborne transmitted diseases. The project is truly multidisciplinary, involving astrophysicists, physicists, optical engineers, designers, and biological scientists. It has an aggressive timeline, which should quickly add to the current body of knowledge regarding mask efficacy.”
The research has been funded under the COVID-19 Rapid Response Funding call for Phase Two. In March 2020, the Irish Government launched a National Action Plan in response to COVID-19 focused on minimising risk of illness for all, minimising risk of exposure of vulnerable groups, and minimising social and economic disruption.