High-performance multifunctional electrospun fibrous air filter for personal protection: A review

Shao, Zungui; Chen, Huatan; Wang, Qingfeng; Kang, Guoyi; Wang, Xiang; Li, Wenwang; Liu, Yifang; Zheng, Guo

doi:10.1016/j.seppur.2022.122175

Cited by 77 publications

(33 citation statements)

References 192 publications

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“…Proper mechanical properties, including strength, modulus, and toughness, represent an important characteristic of longacting membrane filters. 33 As illustrated in Figure S4, the incorporation of HABE enabled large improvements in the tensile properties of PLA composite membranes. It is apparent from the stress−strain curves that both pure PLA and HABEmodified PLA membranes displayed similar deformation modes, successively involving the initial elastic deformation (strain below 5%), a strain-hardening stage (mainly in the range of 5−20% strain), and catastrophic fracture (approximately 20% strain).…”

Section: ■ Results and Discussionmentioning

confidence: 96%

“…It indicates that protrusions of HABE in fibrous membranes and bimodal fibers could promote the air slip effect, leading to the decrease in air resistance. 13,33 Given that the focus of this work is to demonstrate the trapping ability to different diameters, particularly via HABE, pure PLA membranes were used as a control for this experiment (Figure S8). The filtration performance of HABE-modified PLA membranes (PLA/HABE30) was significantly greater than that of pure PLA in regard to the removal of PM 0.3 (particle size ranging from 11.5 to 205.4 nm) at low capacity, as shown in Figure 6e.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Proper mechanical properties, including strength, modulus, and toughness, represent an important characteristic of long-acting membrane filters . As illustrated in Figure S4, the incorporation of HABE enabled large improvements in the tensile properties of PLA composite membranes.…”

Section: Results and Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Bioelectrets in Electrospun Bimodal Poly(lactic acid) Fibers: Realization of Multiple Mechanisms for Efficient and Long-Term Filtration of Fine PMs

Tang

Jiang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Despite the great potential in fabrication of biodegradable and eco-friendly air filters by electrospinning poly(lactic acid) (PLA) membranes, the filtering performance is frequently dwarfed by inadequate physical sieving or electrostatic adsorption mechanisms to capture airborne particulate matters (PMs). Here, using the parallel spinning approach, the unique micro/nanoscale architecture was established by conjugation of neighboring PLA nanofibers, creating bimodal fibers in electrospun PLA membranes for the enhanced slip effect to significantly reduce the air resistance. Moreover, the bone-like nanocrystalline hydroxyapatite bioelectret (HABE) was exploited to enhance the dielectric and polarization properties of electrospun PLA, accompanied by the controlled generation of junctions induced by the microaggregation of HABE (10–30 wt %). The incorporated HABE was supposed to orderly align in the applied E-field and largely promote the charging capability and surface potential, gradually increasing to 7.2 kV from the lowest level of 2.5 kV for pure PLA. This was mainly attributed to HABE-induced orientation of PLA backbone chains and CO dipoles, as well as the interfacial charges trapped at the interphases of HABE–PLA and crystalline region–amorphous PLA. Given the multiple capturing mechanisms, the micro/nanostructured PLA/HABE membranes were characterized by excellent and sustainable filtering performance, e.g., the filtration efficiency of PM0.3 was promoted from 59.38% for pure PLA to 94.38% after addition of 30 wt % HABE at a moderate airflow capacity of 32 L/min and from 30.78 to 83.75% at the highest level of 85 L/min. It is of interest that the pressure drop was significantly decreased, mainly arising from the slip effect between the ultrafine nanofibers and conjugated microfibers. The proposed combination of the nanostructured electret and the multistructuring strategy offers the function integration of efficient filtration and low resistance that are highly useful to pursue fully biodegradable filters.

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Section: ■ Results and Discussionmentioning

confidence: 96%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Bioelectrets in Electrospun Bimodal Poly(lactic acid) Fibers: Realization of Multiple Mechanisms for Efficient and Long-Term Filtration of Fine PMs

Tang

Jiang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Electrospinning is one of the main methods of preparing ultrafine nanofibrous materials, which have broad applicational prospects in the fields of air filtration [ 1 ], polluted water purification [ 2 ], the development of medical dressings [ 3 ], active food packaging [ 4 ], electromagnetic interference shielding [ 5 ], and so on. Particularly, in the case of increasingly serious global water pollution, multifunctional oil–water separation nanofiber membranes are used to efficiently purify water resources [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

State Recognition of Multi-Nozzle Electrospinning Based on Image Processing

et al. 2023

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The online monitoring of a multi-jet electrospinning process is critical to the achievement of stable mass electrospinning for industrial applications. In this study, the construction of an ejection state recognition system of a multi-jet electrospinning process based on image processing is reported. The ejection behaviors regarding multi-nozzle electrospinning were recorded by CMOS industrial cameras in real time. The characteristic information regarding the multi-jet cone tip was obtained by processing the images regarding Roberts operator edge detection, Hough transform line detection, and mask histogram analysis. The jet anomalies of the hanging droplets in the nozzle outlet area could be obtained and identified by the vision. The identification accuracy towards the target hanging droplets was more than 85%. This work reports the intelligent control of large-scale multi-nozzle electrospinning equipment.

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“…Electrospinning is a versatile and low-cost technology allowing for the production of nanofibers from a very large choice of polymers [ 8 , 9 ]. In the literature, some of the electrospun polymers that were applied for air filtration are polyamide (PA) [ 10 ], polyethylene terephthalate (PET) [ 11 ], polyacrylonitrile (PAN) [ 12 ], polylactic acid (PLA) [ 13 ], and polyvinyl alcohol [ 14 , 15 ] often laid on meltblown or spunbond nonwoven textiles [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Electrospun Filtering Membrane Designed as Component of Self-Decontaminating Protective Masks

et al. 2022

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The 2019 coronavirus outbreak and worsening air pollution have triggered the search for manufacturing effective protective masks preventing both particulate matter and biohazard absorption through the respiratory tract. Therefore, the design of advanced filtering textiles combining efficient physical barrier properties with antimicrobial properties is more newsworthy than ever. The objective of this work was to produce a filtering electrospun membrane incorporating a biocidal agent that would offer both optimal filtration efficiency and fast deactivation of entrapped viruses and bacteria. After the eco-friendly electrospinning process, polyvinyl alcohol (PVA) nanofibers were stabilized by crosslinking with 1,2,3,4-butanetetracarboxylic acid (BTCA). To compensate their low mechanical properties, nanofiber membranes with variable grammages were directly electrospun on a meltblown polypropylene (PP) support of 30 g/m2. The results demonstrated that nanofibers supported on PP with a grammage of around only 2 g/m2 presented the best compromise between filtration efficiencies of PM0.3, PM0.5, and PM3.0 and the pressure drop. The filtering electrospun membranes loaded with benzalkonium chloride (ADBAC) as a biocidal agent were successfully tested against E. coli and S. aureus and against human coronavirus strain HCoV-229E. This new biocidal filter based on electrospun nanofibers supported on PP nonwoven fabric could be a promising solution for personal and collective protection in a pandemic context.

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High-performance multifunctional electrospun fibrous air filter for personal protection: A review

Cited by 77 publications

References 192 publications

Bioelectrets in Electrospun Bimodal Poly(lactic acid) Fibers: Realization of Multiple Mechanisms for Efficient and Long-Term Filtration of Fine PMs

Bioelectrets in Electrospun Bimodal Poly(lactic acid) Fibers: Realization of Multiple Mechanisms for Efficient and Long-Term Filtration of Fine PMs

State Recognition of Multi-Nozzle Electrospinning Based on Image Processing

Electrospun Filtering Membrane Designed as Component of Self-Decontaminating Protective Masks

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