IIT Guwahati researchers develop affordable antiviral/antibacterial spray-based coating for Personal Protective Equipment to prevent spread of infection

A team of researchers of Indian Institute of Technology Guwahati has developed affordable antimicrobial (antiviral/antibacterial) spray-based coating for Personal Protective Equipment and 3D printed Ear Guard for comfortable use of face masks by healthcare workers.

• The concepts have been developed by Dr. Biman B. Mandal, Professor, Department of Biosciences and Bioengineering, IIT Guwahati, along with his PhD scholars, Mr. Bibhas K. Bhunia and Mr. Ashutosh Bandyopadhyay.

• Personal Protective Equipment (PPE) that are being used presently are designed to protect the wearer from infectious microbes/aqueous virus droplets acting as a barrier.
• However, these PPE, generally, do not have the ability to prevent the spread of microbes as the surface of the fabric readily allows adherence and accumulation of microbes with time.
• This leads to further spread of the microbes due to negligent handling of PPE and wrong disposal protocols.

• The strategic association of metal nanoparticle cocktail, such as copper, silver and other active ingredients, present in the spray acts as an antimicrobial agent.
• This ensures limited penetration and accumulation of microbial contaminants on PPE. Thus, the coating has the potential to reduce the risk of secondary infection by limiting the transmission of the microbes.
• The innovation is affordable and readily deployable using existing infrastructure available with PPE manufacturers. It can be spray/dip-coated onto any kind of surface including textiles and other medical device surfaces to get rid of microbial load. This will allow reusability of PPEs and easy containment of the microbes.
• The research team has developed the prototype of the technology. Further validation of product safety is ongoing and antimicrobial action specifically against Coronavirus will be done at a government facility. The team has filed for a Provisional Patent for the technology.

• Killing of microbes will allow reusability of masks and other PPEs. Hence, less burden will be on the manufactures for making millions of masks which are generally thrown away after single use
• Restrict spreading of microbes to fingers and other individuals due to negligent usage of masks where users tend to touch them while removing
• Reduce bioburden and transmission after disposal
• The affordable technology can be implemented through a one-step facile spray/dip method using existing industry infrastructure to coat fabric materials which are commonly used for mask/bodysuits.

• Long-time usage of strapped and tight-fitting face masks is painful to the ears. This has been a major concern with healthcare workers who have to wear these masks for hours during duty cycle. Even for commoners during corona crisis, masks are to be worn constantly. To address this critical issue, the research team has 3D printed ‘Ear Guard’ prototype.
• The ergonomical design of the guard holds the face mask strap in a place without giving pressure to the ear. Therefore, masks can be worn effortlessly for hours without pain or discomfort to the wearer.
• These are being printed at the Biomaterial & Tissue Engineering Laboratory of IIT Guwahati using polymer resins. The ear guards are affordable, long-lasting and designed to give comfortable wearing experience.
• 3D Printed Ear Guard has been designed and printed by Dr. Biman B. Mandal along with his PhD scholars, Mr. Ashutosh Bandyopadhyay and Mr. Bibhas K. Bhunia.