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New Self Cleaning Material To Aid Reuse Of Face Masks, PPE

Merely hanging out the masks in bright sunlight can clean the mask and make it ready to wear again

Researchers at the Indian Institute of Technology Mandi have developed a novel virus-filtering, self-cleaning and antibacterial material that can be used to make and reuse face masks and other PPE equipment. The new masks can kill microbes and are solar light-cleanable. It can also filter more than 96 percent of particles that are in the size range of the Covid Virus (120 nanometres), without compromising on the breathability of the fabric, and could thus be a powerful tool to prevent the spread of coronavirus and other microbial infections, according to the study, published in the journal Applied Materials and Interfaces.

The researchers have developed prototypes of a 4-layered face mask using the molybdenum sulfide (MoS2) modified fabric. The team used a material that is a hundred thousand times smaller than the width of the human hair to confer antimicrobial properties to polycotton fabric. They incorporated nanometre-sized sheets of MoS2 at the sharp edges and corners, which act like tiny knives that pierce bacterial and viral membranes, thus killing them.

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“Keeping the urgency of the pandemic situation and cost-effectiveness in mind, we have developed a strategy to repurpose existing PPEs, especially face masks, by providing an antimicrobial coating to these protective clothing/textiles,” said lead researcher Amit Jaiswal, Assistant Professor, at the varsity’s School of Basic Sciences.

Masks
Within 5 minutes of solar irradiation, all the MoS2-modified fabrics showed 100 percent killing of both Escherichia coli and Staphylococcus aureus. Pixabay

“The ananoknife’-modified fabrics demonstrated excellent antibacterial activity even after 60 cycles of washing,” Jaiswal said. It also makes this an excellent way to reuse masks and reduce biological waste generation. The reusability of the fabric will also enable it to be integrated with homemade masks, Jaiswal said. In addition, when exposed to light MoS2exhibits photothermal properties, that is, it absorbs solar light and converts it into heat, which kills the microbes.

ALSO READ: ‘Ventilation, Masks Best Safeguards Against Airborne Covid’, Says Prof Srinath Reddy

“Within 5 minutes of solar irradiation, all the MoS2-modified fabrics showed 100 percent killing of both Escherichia coli and Staphylococcus aureus,” said the researchers in the study. Thus, merely hanging out the masks in bright sunlight can clean the mask and make it ready to wear again.

The proposed materials can also be used to fabricate screens/sheets for the creation of makeshift isolation wards, containment cells, and quarantines for holding individuals who come in contact with pathogens. (IANS/JC)

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