Air Filtration and Monitoring of Human Respiratory Signs in Community Sports and Fitness Venues Based on Ag@CNTs

Abstract

In community fitness venues, air quality is closely related to health status. Air filtration and monitoring of human respiratory signs are becoming increasingly important. Therefore, a polyvinyl alcohol-co-polyethylene is prepared by melt extrusion phase separation method, and its suspension is coated on a polypropylene melt blown non-woven fabric substrate to obtain a polyvinyl alcohol-co-polyethylene nanofiber membrane. Then, the silver-decorated carbon nanotube suspension is sprayed onto the nanofiber membrane to obtain a silver-decorated carbon nanotube nanofiber composite membrane. The results demonstrated that in the comparison of filtration efficiency, the filtration efficiencies of silver-decorated carbon nanotube nanofiber composite membrane-1, composite membrane-2, and composite membrane-4 reached 87.63%, 84.32%, and 84.01%, respectively. In the comparison of filtration efficiency cycle performance, with the increase of processing times, the filtration efficiency of the silver-decorated carbon nanotube air filter material mask stabilized at around 95%. In the resistance change rate curves under different humidity conditions, the silver-decorated carbon nanotubes increased the hydrophilicity of the nanofiber membrane, thereby reducing the resistance. Silver-decorated carbon nanotubes can respond promptly to changes in environmental humidity, effectively monitoring human movement and respiratory signs. Additionally, an appropriate amount of silver-decorated carbon nanotubes can enhance air filtration efficiency and reduce pressure drop. In community sports and fitness facilities, this method can significantly improve indoor environmental quality and enhance users’ health experience.

A polyvinyl alcohol polyethylene copolymer nanofiber membrane was prepared by melt extrusion phase separation method, and silver modified carbon nanotubes were sprayed on its surface to prepare a silver modified carbon nanotube nanofiber composite membrane. The research results show that composite membranes exhibit good filtration efficiency in air filtration, reaching up to 87.63%, and can maintain stable filtration efficiency even after multiple uses, providing a new solution for air quality management in community fitness venues.