Verification of slip flow in nanofiber filter media through pressure drop measurement at low-pressure conditions

Li, Bao; Seki, Kazuya; Niinuma, Hitoshi; Ōtani, Yoshio; Balgis, Ratna; Ogi, Takashi; Gradoń, Leon; Okuyama, Kikuo

doi:10.1016/j.seppur.2015.12.045

Cited by 64 publications

(56 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, under much higher airflow velocities involving 10, 14.1, and 16.6 cm s −1 , the filter could still remain robust efficiency of 98.81%, 98.32%, and 98.30%, respectively, as demonstrated in Figure c. Meanwhile, the slope of the fitting line for pressure drop was further reduced to ≈0.94, indicating the structural stability and much more obvious “slip effect” of the ripple‐like filters under various airflow velocities . By virtue of the nearly unchanged removal efficiency and the slowly increased air resistance under extremely high air speed, the QF value of this ripple‐like PA‐6 NF/N filter could achieve 0.043 Pa −1 under 16.6 cm s −1 (Figure d).…”

Section: Resultsmentioning

confidence: 90%

“…Electrospinning/netting, as an advanced electrohydrodynamics technique, stands out from other nanofiber fabrication methods by virtue of its capacity for scalable fabrication of the spider‐web‐like 2D “nanonets.” These resultant nanonets possess the extremely small diameter of ≈20 nm and unique Steiner‐tree pore structures. Benefiting from the true nanoscale diameter of ≈20 nm), the nanonets would exhibit an especially great “slip effect,” revealing their great potential in effectively filtrating the ultrafine airborne particles with low resistance to airflow . Previous, the PA‐66 and PA‐56 NF/N filters were successively prepared in our group, and showed effective capture efficiency but rather high‐pressure drop due to their compact packing structures .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Controlled Design of Ripple‐Like Polyamide‐6 Nanofiber/Nets Membrane for High‐Efficiency Air Filter

Zhang

Liu

Zuo

et al. 2017

Small

125

105

View full text Add to dashboard Cite

The filtration capacity of fibrous media for airborne particles is restricted by their thick diameter, low porosity, and limited frontal area. The ability to solve this problem would have broad technological implications for various air filtration applications; despite many past efforts, it remains a great challenge to achieve. Herein, a facile and scalable strategy to fabricate the ripple-like polyamide-6 nanofiber/nets (PA-6 NF/N) air filter via combining electrospinning/netting technique with receiving substrate design is demonstrated. This proposed approach allows the scaffold filaments to orderly embed into 2D PA-6 nanonets layer with Steiner-tree structures and nanoscale diameter of ≈20 nm, resulting in the ripple-like membrane with extremely small pore size, highly porous structure, and hugely extended frontal surface, by facilely adjusting its pleat span and pleat pitch. These unique structural advantages enable the ripple-like PA-6 NF/N filter to filtrate the ultrafine particles with high removal efficiency of 99.996%, low air resistance of 95 Pa, and robust quality factor of >0.11 Pa ; using its superlight weight of 0.9 g m and physical sieving manner. This approach has the potentialities to give rise to a novel generation of filter media displaying enhanced filtration capacity for various applications thanks to their nanoscale features and designed macrostructures.

show abstract

Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

A Controlled Design of Ripple‐Like Polyamide‐6 Nanofiber/Nets Membrane for High‐Efficiency Air Filter

Zhang

Liu

Zuo

et al. 2017

Small

125

105

View full text Add to dashboard Cite

show abstract

“…Figure 4 presents the cross section microphotograph of the filter media which showed that P84 is characterized with loose structure compare to PTFE that explained the finding. Previous researcher reported that fibre arrangement in conventional PTFE filter media is dense and very thin that cause clogging of particles, resulting in high pressure drop across the filter media [11]. As in figure 2, it was also found that pressure drop across the filtration process increases with different amount of material loading of filter aids for both filter …”

Section: Fig 1 Schematic Diagram Of the Filtration Test Systemmentioning

confidence: 61%

Performance of PrekotAC Filter Aids on Pressure Drop across Two Different Filter Media

Hajar¹,

Rashid²,

Andenan³

et al. 2017

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract.A study on the performance of formulated PrekotAC filter aids on pressure drop across two different types of filter media, i.e polytetrafluoroethylene (PTFE) and polyimide (P84) was carried out in a laboratory scale fabric filtration system. Filter aids is applied in order to prolong the lifespan of the fabric filter by reducing the pressure drop across a filter cake. PrekotAC which is a combination of 90%wt activated carbon and 10%wt PreKot™ was tested under various material loadings of 0.2, 0.4, and 0.6 mg/mm² at a constant filtration velocity of 5 m/min across its cake and filter media. The results showed that PrekotAC presents a lower pressure drop across the P84 compared to PTFE filter media under various material loadings. This is because of its different characteristics that effect the porosity of the filter media and allow a higher volumetric airflow passing through, resulting in lower pressure drop compared to PTFE filter media. In addition, the diversity in terms of particle size distribution of the formulated PrekotAC that increase its permeability property helps to reduce the pressure drop across the media and its filter cake. Thus, PrekotAC has a promising characteristic as a two in one filter aids, a pre-coating and adsorbent material for fabric filtration system.

show abstract

“…22,50,51 Table 3 lists the pressure drops, ltration efficiency, and quality factors of the DMAc20, DMF20, DMAc25, DMAc30, DMF30, and DMAc35 membranes. The measurements were carried out using a face velocity of 5.3 cm s À1 , which is usually used for nanober membrane lter test, as by Bao et al, 52 Matulevicius et al, 22 and Balgis et al 53 Based on Table 3, the DMAc35 membrane has the highest efficiency and pressure drop. The absence of beads caused the membrane to have a smaller pore size and higher packing density, which facilitated better particle capture.…”

Section: Tensile Strengthmentioning

confidence: 99%

The synthesis of nanofiber membranes from acrylonitrile butadiene styrene (ABS) waste using electrospinning for use as air filtration media

et al. 2019

View full text Add to dashboard Cite

show abstract

Verification of slip flow in nanofiber filter media through pressure drop measurement at low-pressure conditions

Cited by 64 publications

References 14 publications

A Controlled Design of Ripple‐Like Polyamide‐6 Nanofiber/Nets Membrane for High‐Efficiency Air Filter

A Controlled Design of Ripple‐Like Polyamide‐6 Nanofiber/Nets Membrane for High‐Efficiency Air Filter

Performance of PrekotAC Filter Aids on Pressure Drop across Two Different Filter Media

The synthesis of nanofiber membranes from acrylonitrile butadiene styrene (ABS) waste using electrospinning for use as air filtration media

Contact Info

Product

Resources

About