Nanofibrous membrane of graphene oxide-in-polyacrylonitrile composite with low filtration resistance for the effective capture of PM2.5

Li, Jing; Zhang, Danzhen; Yang, Tingting; Shen, Yang; Yang, Xudong; Zhu, Hongwei

doi:10.1016/j.memsci.2018.01.025

Cited by 111 publications

(76 citation statements)

References 36 publications

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“…The developed transparent thin filter can be applied to indoor air protection through windows or incorporated into existing personal masks. Inspired by Lui's promising results, a variety of electrospun nanofibre membranes with different surface chemistry and mechanical or thermal properties have been developed from polymers, polymer blends, or polymer composites with surface-functionalized inorganic nanofillers for air purification investigations, including polyurethane [ 127 ], polycarbonate [ 128 ], poly(vinyl alcohol) [ 129 ], polytetrafluoroethylene [ 130 ], polybenzimidazole [ 131 ], polyacrylonitrile/polysulfone [ 132 ], polypropylene/polyethylene [ 133 ], polyurethane/polysulfonamide [ 134 ], polyacrylonitrile/graphene oxide [ 135 ], and polyacrylonitrile/MXene [ 136 ]. Besides conventional electrospinning, polymer nanofibre membranes mass-produced by needless electrospinning [ 137 ] and solution blow spinning [ 138 ] also demonstrated effectiveness for the capture of particulate pollutants.…”

Section: Engineering Of Multifunctional Masks and Mask Materialsmentioning

confidence: 99%

“…As MOF crystals are in a light powder form, they are usually grown on porous substrates or embedded in polymer fibrous membranes to form MOF-based filters. Li's group first explored the interactions between MOFs and particulate pollutants via the incorporation of ZIF-8 nanocrystals in electrospun PAN membranes [ 135 ]. It was proposed that the particulate pollutants can be captured by the MOF-based filters via three mechanisms: (i) binding to the open metal sites on MOFs, (ii) interacting with the functional groups on MOFs and/or polymers, and (iii) electrostatic interactions with MOF nanocrystals ( Figure 11(a) ).…”

Section: Engineering Of Multifunctional Masks and Mask Materialsmentioning

confidence: 99%

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Face Masks in the New COVID-19 Normal: Materials, Testing, and Perspectives

et al. 2020

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The increasing prevalence of infectious diseases in recent decades has posed a serious threat to public health. Routes of transmission differ, but the respiratory droplet or airborne route has the greatest potential to disrupt social intercourse, while being amenable to prevention by the humble face mask. Different types of masks give different levels of protection to the user. The ongoing COVID-19 pandemic has even resulted in a global shortage of face masks and the raw materials that go into them, driving individuals to self-produce masks from household items. At the same time, research has been accelerated towards improving the quality and performance of face masks, e.g., by introducing properties such as antimicrobial activity and superhydrophobicity. This review will cover mask-wearing from the public health perspective, the technical details of commercial and home-made masks, and recent advances in mask engineering, disinfection, and materials and discuss the sustainability of mask-wearing and mask production into the future.

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Section: Engineering Of Multifunctional Masks and Mask Materialsmentioning

confidence: 99%

Section: Engineering Of Multifunctional Masks and Mask Materialsmentioning

confidence: 99%

Face Masks in the New COVID-19 Normal: Materials, Testing, and Perspectives

et al. 2020

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“…To prepare these nanofiber filters, in contrast to other methods, electrospinning has evoked substantial attention, considering its ability to prepare nanofibers with uniform diameter, robust mechanical property, and fine flexibility . To date, many kinds of electrospun nanofibers from different polymers have been produced as air filters, and exhibit enhanced removal efficiency, lower thickness, and lighter base weight compared to their counterparts . However, many drawbacks still remain, ascribed to their limited structural controllability, such as the pseudo‐nanoscale diameters of >100 nm (usually 0.2–2 µm) and uncontrolled packing structures, resulting in a big challenge to further improve their filtration performance.…”

Section: Introductionmentioning

confidence: 99%

A Fluffy Dual‐Network Structured Nanofiber/Net Filter Enables High‐Efficiency Air Filtration

Liu

Zhang

Liu

et al. 2019

Adv Funct Materials

204

142

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Particulate matter (PM) pollution has posed a huge health and economic burden worldwide. Most existing air filters used to remove PMs are structurally monotonous, cumbersome, and inevitably suffer from the compromise between removal efficiency and air permeability; developing an advanced air filter that can overcome these limitations is of significance but highly challenging. Herein, a novel strategy to create ultrathin, high-performance air filters based on fluffy dual-network structured polyacrylonitrile nanofiber/ nets, via a humidity-induced electrospinning/netting technique, is reported. By tailoring the ejection and phase separation of the charged liquids, this approach causes 2D ultrafine (≈20 nm) nanonets tightly bonded with fluffy pseudo-3D nanofiber scaffolds to form dual-network structures, with controllable pore size and stacking density on a large scale. The resultant nanofiber/ net filters possess the integrated features of small pore size (<300 nm), high porosity (93.9%), low packing density, combined with desirable surface chemistry (4.3-D dipole moment), resulting in high-efficiency PM 0.3 removal (>99.99%), low air resistance (only <0.11% of atmosphere pressure), and promising long-term PM 2.5 purification. The synthesis of such materials may provide new insights into the design and development of high-performance filtration and separation materials for various applications.

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“…The filtration performance of the membrane with optimal function was evaluated by measuring filtration efficiency and airflow resistance with a purpose-built device (Figure 2) as in other research studies. 34–36 The membrane filter was held between two identical acrylic straight tubes (length 260 mm, inside diameter 100 mm) that were tightly connected by a sealing flange. On one side, an atmospheric dust containing particles and microorganisms was applied as the aerosol source.…”

Section: Methodsmentioning

confidence: 99%

Preparation of a polyacrylonitrile/polyurethane nanofibrous membrane with antibacterial function and measurement of its air filtration performance

YuMing

Cao

2018

Indoor and Built Environment

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Particulate matter and airborne microorganism pollution are two of the most serious indoor air problems due to their significant threat to human health. Research on air filtration with antibacterial function and good filtration performance is highly desirable and urgent. In this study, polyacrylonitrile/polyurethane (PAN/PU) composite nanofibrous membranes with an antibacterial agent AgTiO2 were prepared by an electrospinning method. The average diameter of each membrane is about 300–400 nm. The antibacterial activities of PAN/PU composite nanofibrous membranes against both Escherichia coli and Staphylococcus aureus were investigated by the shake flask method. For an Ag2.5 membrane (AgTiO2 added to 2.5% w/w of solute (PAN and PU) in the electrospinning solution), the bacteriostasis rate can be >99.99%. The filtration efficiency is 99.88% for 0.3 µm particles and >99.99% for airborne microorganisms with a 220.3 Pa pressure differential. The quality factor is higher than that of a commercial filter with comparable filtration efficiency. The effects of relevant parameters on filtration performance were analysed qualitatively by theoretical calculation. The results show that it is more effective to improve the filtration performance by adjusting fibre diameter and filling rate than thickness. Our findings suggest that the nanofibrous membrane with antibacterial function has a great potential for indoor air filtration.

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Nanofibrous membrane of graphene oxide-in-polyacrylonitrile composite with low filtration resistance for the effective capture of PM2.5

Cited by 111 publications

References 36 publications

Face Masks in the New COVID-19 Normal: Materials, Testing, and Perspectives

Face Masks in the New COVID-19 Normal: Materials, Testing, and Perspectives

A Fluffy Dual‐Network Structured Nanofiber/Net Filter Enables High‐Efficiency Air Filtration

Preparation of a polyacrylonitrile/polyurethane nanofibrous membrane with antibacterial function and measurement of its air filtration performance

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