Antimicrobial air filter made of chitosan-ZnO nanoparticles immobilized on white silica gel beads

Hidayat, Muhammad; Siregar, Tongku Nizwan; Suhartono, Suhartono; Hayati, Zinatul; Bakar, Noor Hana Hanif Abu

doi:10.1016/j.arabjc.2023.104967

Cited by 7 publications

(1 citation statement)

References 75 publications

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“…Meanwhile, the majority of air filters lacks antibacterial properties, and as a result, captured microorganisms within the filtering material might remain active, potentially elevating the hazard of infection and spread, while the filter is in use or upon multiple uses. 12,13 It is unable to meet the requirements of personal protection, indoor cleaning, and industrial production. 14 Hence, improving efficiency, reducing pressure drop, and adding antibacterial properties to air filtration materials have become a hot topic.…”

Section: Introductionmentioning

confidence: 99%

Bead-on-String-Like Nanofibrous Membrane for High-Efficiency, Low-Pressure Drop Air Filters with Antimicrobial Properties

Sun,

Ju,

Xiong

et al. 2024

ACS Appl. Polym. Mater.

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Particulate matter (PM) pollution poses a significant risk to public health, as it can carry pathogens such as bacteria and viruses into the body through the respiratory tract, leading to a variety of illnesses. Electrospun nanofibrous membranes (ENMs) exhibit substantial promise for air filtration applications. However, most nanofibrous membranes have a trade-off between filtration efficiency and pressure drop. The bead-on-string structured membranes are characterized by their ability to achieve a higher efficiency and lower pressure drop. Here, we prepared a bead-on-string-like structure of ENM with fluxible poly(p-phenylene terephthalamide) (f-PPTA) and silver nanoparticles (Ag NPs) on a polypropylene (PP) nonwoven fabric substrate. The two layers of membranes enable graded filtration and reduce the pressure drop. The f-PPTA plays a role in controlling both the diameter and roughness of nanofibrous membranes, and its grafted quaternary ammonium salts impart antimicrobial properties to the membrane. Ag NPs serve as a skeleton and form a bead-on-string-like structure with f-PPTA/PA6 nanofibers. In conclusion, this membrane achieves a 99.39% efficiency for PM0.3, a low-pressure drop of 21 Pa, and a quality factor (QF) value of 0.24 Pa–1 and exhibits antibacterial properties against both E. coli and S. aureus. This study indicates that the nanofiber structure can be transformed into a bead-on-string-like structure with low-pressure drop by reasonable matching of the size of nanoparticles and nanofibers, and the combined action of f-PPTA and Ag NPs can effectively improve the antibacterial effect of nanofiber membranes, which is of significant importance for the research on high-efficiency particulate air (HEPA) filter.

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Section: Introductionmentioning

confidence: 99%