Particulate matter (PM) in the environment can adversely affect the health of living things. However, high removal efficiency and low-pressure loss are crucial design challenges for any air filtration system. To circumvent the challenge, here, we demonstrate a novel triboelectric (TE) air filtration system that is based on a rotation-type triboelectric nanogenerator (TENG) and a filter comprising two sets of plates: primary and secondary, that are placed in the airflow channel. When the TENG charges the two plate sets with opposite charges, the flowing air particles are charged at the primary plates and are collected, due to an electric field, at the secondary plates. The TE filter has demonstrated a PM2.5 removal efficiency of ~ 99.97% for the fine dust particles, and it remains stable even after several washing cycles. The pressure loss is almost two orders less than the high-efficiency particulate air filter. Since the airflow itself can drive the TENG, the TE filter can potentially be integrated with any air conditioning system for fine dust filtration in offices, automobiles, etc.
Particulate matter (PM) in the environment can adversely affect the health of living things. However, high removal efficiency and low-pressure loss are crucial design challenges for any air filtration system. To circumvent the challenge, here, we demonstrate a novel triboelectric (TE) air filtration system that is based on a rotation-type triboelectric nanogenerator (TENG) and a filter comprising two sets of plates: primary and secondary, that are placed in the airflow channel. When the TENG charges the two plate sets with opposite charges, the flowing air particles are charged at the primary plates and are collected, due to an electric field, at the secondary plates. The TE filter has demonstrated a PM2.5 removal efficiency of ~ 99.97% for the fine dust particles, and it remains stable even after several washing cycles. The pressure loss is almost two orders less than the high-efficiency particulate air filter. Since the airflow itself can drive the TENG, the TE filter can potentially be integrated with any air conditioning system for fine dust filtration in offices, automobiles, etc.
“…(c) Concept of virus-blocking textile for SARS-CoV-2 using human body triboelectric energy harvesting that repulses SARS-CoV-2 aerosols using Coulomb force. Reproduced with permission from ref . Copyright 2022 Elsevier.…”
Section: Electroactive Materials For Preventing Virus
Infections In F...mentioning
confidence: 99%
“…The VBT can generate frictional electricity and exert repulsive Coulomb forces on respiratory virus particles (Figure 7c), and its blocking rate of SARS-CoV-2 was up to 99.95%. 139 Jeong et al 140 recently developed a reusable frictional electrofiltration filter using a Si-Al/PFOTES-CV (SAPC)-based nanocoating. The composite nanolayer comprised a transparent SAS matrix, CV photosensitizer, and PFOTES (Figure 7d).…”
Section: Conductive Materialsmentioning
confidence: 99%
“…In another study, Mariello et al prepared a triboelectric face maks by laminating PVDF nanofiber membrane, laser-induced polyimide/polydimethylsiloxane, and Ecoflex (Figure b). Kang et al used two conductive PEDOT/PSS-coated silk fabrics and an insulating nonwoven filter layer to design a virus-blocking textile (VBT). The VBT can generate frictional electricity and exert repulsive Coulomb forces on respiratory virus particles (Figure c), and its blocking rate of SARS-CoV-2 was up to 99.95% .…”
Section: Electroactive Materials For Preventing Virus
Infections In F...mentioning
Air-transmitted pathogens may cause severe epidemics,
posing considerable
threats to public health and safety. Wearing a face mask is one of
the most effective ways to prevent respiratory virus infection transmission.
Especially since the new coronavirus pandemic, electroactive materials
have received much attention in antiviral face masks due to their
highly efficient antiviral capabilities, flexible structural design,
excellent sustainability, and outstanding safety. This review first
introduces the mechanism for preventing viral infection or the inactivation
of viruses by electroactive materials. Then, the applications of electrostatic-,
conductive-, triboelectric-, and microbattery-based materials in face
masks are described in detail. Finally, the problems of various electroactive
antiviral materials are summarized, and the prospects for their future
development directions are discussed. In conclusion, electroactive
materials have attracted great attention for antiviral face masks,
and this review will provide a reference for materials scientists
and engineers in antiviral materials and interfaces.
“…In nature, viral particles have relatively weak negative charges [ 84 , 85 , 86 ]. The charge of the PMs directly determines the magnitude of the Coulomb force on them when using electrostatic precipitation methods to collect PMs.…”
Section: Sampling Techniques and Devices Of Airborne Virusesmentioning
Airborne viruses, such as COVID-19, cause pandemics all over the world. Virus-containing particles produced by infected individuals are suspended in the air for extended periods, actually resulting in viral aerosols and the spread of infectious diseases. Aerosol collection and detection devices are essential for limiting the spread of airborne virus diseases. This review provides an overview of the primary mechanisms and enhancement techniques for collecting and detecting airborne viruses. Indoor virus detection strategies for scenarios with varying ventilations are also summarized based on the excellent performance of existing advanced comprehensive devices. This review provides guidance for the development of future aerosol detection devices and aids in the control of airborne transmission diseases, such as COVID-19, influenza and other airborne transmission viruses.
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