In this paper, patterned nanofibrous membranes were fabricated for air filtration. Polyacrylonitrile was employed as the electrospinning material as its fluffy property and bulged bubble template served as collector to prepare the patterned membrane. With this special structure, the pressure drop significantly declined from 151.7 to 24.7 mmH2O, although the filtration efficiency of nanofiber membranes exhibited a slight decline from 99.94% to 96.33% compared to traditional electrospinning nanofibrous membranes. These sharp declines of the pressure drop while retaining the filtration efficiency imply that it could have more extensive applications.
WallaceLSloneckerT. Ambient air concentrations of fine (PM2.5) manganese in US national parks and in California and Canadian cities: the possible impact of adding MMT to unleaded gasoline. J Air Waste Manag Assoc1997; 47: 642–652.
2.
SlossLLSmithIM. PM10 and PM2.5: an international perspective. Fuel Process Technol2000; 65: 127–141.
KhinMMNairASBabuVJ. A review on nanomaterials for environmental remediation. Energy Environ Sci2012; 5: 8075–8109.
5.
HuangZMZhangYZKotakiM. A review on polymer nanofibers by electrospinning and their applications in nanocomposites. Compos Sci Technol2003; 63: 2223–2253.
6.
KempKCSeemaHSalehM. Environmental applications using graphene composites: water remediation and gas adsorption. Nanoscale2013; 5: 3149–3171.
7.
LiPWangC-YLiZ. Hierarchical carbon-nanotube/quartz-fiber films with gradient nanostructures for high efficiency and long service life air filters. RSC Adv2014; 4: 54115–54121.
WangJKimSCDavidYHP. Figure of merit of composite filters with micrometer and nanometer fibers. Aerosol Sci Technol2008; 42: 722–728.
11.
AmiriPBahramiSH. Electrospinning of poly(acrylonitrile-acrylic acid)/beta cyclodextrin nanofibers and study of their molecular filtration characteristics. Fibres Text East Eur2014; 22: 14–21.
12.
WanH-GWangNYangJ-M. Hierarchically structured polysulfone/titania fibrous membranes with enhanced air filtration performance. J Colloid Interface Sci2014; 417: 18–26.
13.
WangNSiY-SWangN. Multilevel structured polyacrylonitrile/silica nanofibrous membranes for high-performance air filtration. Sep Purif Technol2014; 126: 44–51.
14.
WallaceW-FLHungC-H. Investigation on pressure drop evolution of fibrous filter operating in aerodynamic slip regime under continuous loading of sub-micron aerosols. Sep Purif Technol2008; 63: 691–700.
15.
CaoX-WHuangM-LDingB. Robust polyacrylonitrile nanofibrous membrane reinforced with jute cellulose nanowhiskers for water purification. Desalination2013; 316: 120–126.
16.
HeJ-JWangWSunF-L. Highly efficient phosphate scavenger based on well-dispersed La(OH)(3) nanorods in polyacrylonitrile nanofibers for nutrient-starvation antibacteria. ACS Nano2015; 9: 9292–9302.
17.
WangWLiZYXuXR. Au-doped polyacrylonitrile-polyaniline core-shell electrospun nanofibers having high field-effect mobilities. Small2011; 7: 597–600.
18.
ZhangD-MChangJ. Patterning of electrospun fibers using electroconductive templates. Adv Mater2007; 19: 3664–3664.
19.
ZhaoS-YZhouQ-HLongY-Z. Nanofibrous patterns by direct electrospinning of nanofibers onto topographically structured nonconductive substrates. Nanoscale2013; 5: 4993–5000.
