Abstract
Aerosol filtration using electrospun cellulose acetate filters with different mean fiber diameters is reported, and the results are compared with those for two conventional filter media, a glass fiber filter and a cellulose acetate microfiber filter. The performance of these filters was studied using two aerosols, one solid (NaCl) and one liquid (diethyl hexyl sebacate), under conditions of relatively high face velocity (45 cm/s). The experimental observations are compared to theoretical predictions based on single fiber filtration efficiency. Our results indicate that the mechanisms for single fiber filtration efficiency provide reasonable predictions of the most penetrating particle size (MPPS), in the range of 40–270 nm, percentage penetration from 0.03 to 70 %, and fiber diameter in the range from 0.1 to 24 µm. Using an analysis based on blocking filtration laws, we conclude that filtration by cake formation dominated in the case of NaCl aerosols on electrospun filter media, whereas filters with larger fiber diameter showed a transition in mechanisms, from an initial regime characterized by pore blocking to a later regime characterized by cake formation. The liquid aerosol did not exhibit cake formation, even for the smallest fiber diameters, and also had much smaller influence on pressure drop than did the solid aerosol. The electrospun filters demonstrated slightly better quality factors compared to the commercial glass fiber filter, at a much lower thickness. In general, this study demonstrates control of the properties of electrospun cellulose acetate fibers for air filtration application.
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References
Wang J, Tronville P (2014) Toward standardized test methods to determine the effectiveness of filtration media against airborne nanoparticles. J Nanopart Res 16:2417
Kim K, Lee C, Kim IW, Kim J (2009) Performance modification of a melt-blown filter medium via an additional nano-web layer prepared by electrospinning. Fibers Polym 10:60
Li L, Zuo ZL, Japuntich DA, Pui DYH (2012) Evaluation of filter media for particle number, surface area and mass penetrations. Ann Occup Hyg 56:581
Swanson J, Watts W, Kittelson D, Newman R, Ziebarth R (2013) Filtration efficiency and pressure drop of miniature diesel particulate filters. Aerosol Sci Technol 47:452
Hammond D, Fong GT, Cummings KM, O’Connor RJ, Giovino GA, McNeill A (2006) Cigarette yields and human exposure: a comparison of alternative testing regimens. Cancer Epidemiol Biomark Prev 15:1495
Hubbard JA, Salazar KC, Crown KK, Servantes BL (2014) High-volume aerosol filtration and mitigation of inertial particle rebound. Aerosol Sci Technol 48:530
Hinds WC (1999) Aerosol technology: properties, behavior, and measurement of airborne particles. Wiley, Hoboken
Brown RC (1993) Air filtration: an integrated approach to the theory and applications of fibrous filters. Pergamon Press, Oxford
Japuntich DA, Stenhouse JIT, Liu BYH (1994) Experimental results of solid monodisperse particle clogging of fibrous filters. J Aerosol Sci 25:385
Huang SH, Chen CW, Kuo YM, Lai CY, McKay R, Chen CC (2013) Factors affecting filter penetration and quality factor of particulate respirators. Aerosol Air Qual Res 13:162
Leung WWF, Hung CH (2008) Investigation on pressure drop evolution of fibrous filter operating in aerodynamic slip regime under continuous loading of sub-micron aerosols. Sep Purif Technol 63:691
Matulevicius J, Kliucininkas L, Martuzevicius D, Krugly E, Tichonovas M, Baltrusaitis J (2014) Design and characterization of electrospun polyamide nanofiber media for air filtration applications. J Nanomater 859656:1
Podgorski A, Balazy A, Gradon L (2006) Application of nanofibers to improve the filtration efficiency of the most penetrating aerosol particles in fibrous filters. Chem Eng Sci 61:6804
Wang J, Kim SC, Pui DY (2008) Investigation of the figure of merit for filters with a single nanofiber layer on a substrate. J Aerosol Sci 39:323
Kuo YY, Bruno FC, Wang W (2014) Filtration performance against nanoparticles by electrospun Nylon-6 media containing ultrathin nanofibers. Aerosol Sci Technol 48:13
Kim GT, Ahn YC, Lee JK (2008) Characteristics of Nylon 6 nanofilter for removing ultra fine particles. Korean J Chem Eng 25:368
Leung WWF, Hung CH, Yuen PT (2010) Effect of face velocity, nanofiber packing density and thickness on filtration performance of filters with nanofibers coated on a substrate. Sep Purif Technol 71:30
Rutledge GC, Fridrikh SV (2007) Formation of fibers by electrospinning. Adv Drug Deliv Rev 59:1384
Yun KM, Hogan CJ, Mastubayashi Y, Kawabe M, Iskandar F, Okuyama K (2007) Nanoparticle filtration by electrospun polymer fibers. Chem Eng Sci 62:4751
Ramakrishna S, Jose R, Archana PS, Nair AS, Balamurugan R, Venugopal J, Teo WE (2010) Science and engineering of electrospun nanofibers for advances in clean energy, water filtration, and regenerative medicine. J Mater Sci 45:6283. doi:10.1007/s10853-010-4509-1
Yeom BY, Pourdeyhimi B (2011) Aerosol filtration properties of PA6/PE islands-in-the-sea bicomponent spunbond web fibrillated by high-pressure water jets. J Mater Sci 46:5761. doi:10.1007/s10853-011-5531-7
Pai CL, Boyce MC, Rutledge GC (2011) On the importance of fiber curvature to the elastic moduli of electrospun nonwoven fiber meshes. Polymer 52:6126
Wang Z, Zhao C, Pan Z (2015) Porous bead-on-string poly(lactic acid) fibrous membranes for air filtration. J Colloid Interface Sci 441:121
Li J, Gao F, Liu LQ, Zhang Z (2013) Needleless electro-spun nanofibers used for filtration of small particles. Express Polym Lett 7:683
Choong LT, Khan Z, Rutledge GC (2014) Permeability of electrospun fiber mats under hydraulic flow. J Membr Sci 451:111
Choong LT, Mannarino MM, Basu S, Rutledge GC (2013) Compressibility of electrospun fiber mats. J Mater Sci 48:7827. doi:10.1007/s10853-013-7528-x
Ahn YC, Park SK, Kim GT, Hwang YJ, Lee CG, Shin HS, Lee JK (2006) Development of high efficiency nanofilters made of nanofibers. Curr Appl Phys 6:1030
Dumanli AG, Windle AH (2012) Carbon fibres from cellulosic precursors: a review. J Mater Sci 47:4236. doi:10.1007/s10853-011-6081-8
Alamein MA, Stephens S, Liu Q, Skabo S, Warnke PH (2013) Mass production of nanofibrous extracellular matrix with controlled 3D morphology for large-scale soft tissue regeneration. Tissue Eng Part C Methods 19:458
Forward KM, Rutledge GC (2012) Free surface electrospinning from a wire electrode. Chem Eng J 183:492
Shin YM, Hohman MM, Brenner MP, Rutledge GC (2001) Experimental characterization of electrospinning: the electrically forced jet and instabilities. Polymer 42:9955
Schneider CA, Rasband WS, Eliceiri KW (2012) NIH Image to ImageJ: 25 years of image analysis. Nat Methods 9:671
Herman, L. L. (2006). Cellulose acetate and triacetate fibers, in Handbook of Fiber Chemistry, Third edition. CRC press.
Sinclair D, Lamer VK (1949) Light scattering as a measure of particle size in aerosols—the production of monodisperse aerosols. Chem Rev 44:245
Reneker DH, Yarin AL, Fong H, Koombhongse S (2000) Bending instability of electrically charged liquid jets of polymer solutions in electrospinning. J Appl Phys 87:4531
Yu JH, Fridrikh SV, Rutledge GC (2006) The role of elasticity in the formation of electrospun fibers. Polymer 47:4789
Huang SH, Kuo YM, Chang KN, Chen YK, Lin WY, Lin WY, Chen CC (2010) Experimental study on the effect of fiber orientation on filter quality. Aerosol Sci Technol 44:964
Gibson P, Schreuder-Gibson H, Rivin D (2001) Transport properties of porous membranes based on electrospun nanofibers. Colloids Surf A 187:469
Kirsch AA, Stechkina IB, Fuchs NA (1974) Gas flow in aerosol filters made of polydisperse ultrafine fibres. J Aerosol Sci 5:39
Charvet A, Gonthier Y, Gonze E, Bernis A (2010) Experimental and modelled efficiencies during the filtration of a liquid aerosol with a fibrous medium. Chem Eng Sci 65:1875
Leung WWF, Hung CH (2012) Skin effect in nanofiber filtration of submicron aerosols. Sep Purif Technol 92:174
Yun KM, Suryamas AB, Iskandar F, Bao L, Niinuma H, Okuyama K (2010) Morphology optimization of polymer nanofiber for applications in aerosol particle filtration. Sep Purif Technol 75:340
Stafford RG, Ettinger HJ (1971) Comparison of filter media against liquid and solid aerosols. Am Ind Hyg Assoc J 32:319
Uecker JC, Tepper GC, Rosell-Llompart J (2010) Ion-assisted collection of Nylon-4,6 electrospun nanofibers. Polymer 51:5221
Field RW, Wu D, Howell JA, Gupta BB (1995) Critical flux concept for microfiltration fouling. J Membr Sci 100:259
Hermia J (1982) Constant pressure blocking filtration laws—application to power-law non-Newtonian fluids. Trans Inst Chem Eng 60:183
Iritani E (2013) A review on modeling of pore-blocking behaviors of membranes during pressurized membrane filtration. Dry Technol 31:146
Choong LT, Lin YM, Rutledge GC (2015) Separation of oil-in-water emulsions using electrospun fiber membranes and modeling of the fouling mechanism. J Membr Sci 486:229
Eichhorn SJ, Sampson WW (2005) Statistical geometry of pores and statistics of porous nanofibrous assemblies. J R Soc Interface 2:309
Wang R, Liu Y, Li B, Hsiao BS, Chu B (2012) Electrospun nanofibrous membranes for high flux microfiltration. J Membr Sci 392:167
Lowery JL, Datta N, Rutledge GC (2010) Effect of fiber diameter, pore size and seeding method on growth of human dermal fibroblasts in electrospun poly(epsilon-caprolactone) fibrous mats. Biomaterials 31:491
Pham QP, Sharma U, Mikos AG (2006) Electrospun poly(epsilon-caprolactone) microfiber and multilayer nanofiber/microfiber scaffolds: characterization of scaffolds and measurement of cellular infiltration. Biomacromolecules 7:2796
Contal P, Simao J, Thomas D, Frising T, Calle S, Appert-Collin JC, Bemer D (2004) Clogging of fibre filters by submicron droplets. Phenomena and influence of operating conditions. J Aerosol Sci 35:263
Penicot P, Thomas D, Contal P, Leclerc D, Vendel J (1999) Clogging of HEPA fibrous filters by solid and liquid aerosol particles: an experimental study. Filtr Sep 36:59
Chen CC, Chen WY, Huang SH, Lin WY, Kuo YM, Jeng FT (2001) Experimental study on the loading characteristics of needlefelt filters with micrometer-sized monodisperse aerosols. Aerosol Sci Technol 34:262
Acknowledgements
The funding for this project was provided by Philip Morris International (Neuchâtel, Switzerland). We also like to acknowledge the Institute for Soldier Nanotechnology at MIT for use of facilities and Dr. Matthew M. Mannarino for helpful discussion.
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Chattopadhyay, S., Hatton, T.A. & Rutledge, G.C. Aerosol filtration using electrospun cellulose acetate fibers. J Mater Sci 51, 204–217 (2016). https://doi.org/10.1007/s10853-015-9286-4
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DOI: https://doi.org/10.1007/s10853-015-9286-4