Nanofiber filters

The improvement in performance reported for these filters even in these preliminary experiments is very significant. Despite Ihe unavoidable scatter in data due to variation in packing density and filter thickness, the performance of nanofiber filters appears to well surpass that of the conunercial fiberglass utihty filters. Optimistically, the best data in the table suggest as much as an order of magnitude improvement in FoM for nanofiber mats over HEPA filters. The relative contributions of slip and electrostatic effects to the reported filter performance have not been totally assessed and may depend on the conditions used to eleetrospin eaeh filter mat. It has been estimated that the contribution of electrostatics to the FoM is about 20%. 

Grafe et al. [62] compared the filtration performances of a composite cellu-lose/nanofiber filter and a standard (wet-laid cellulose) filter and discussed the performance of nanofiber media in a mining vehicle cabin air filter. These two kinds of filters were tested independently on a Caterpillar 992G wheel loader, mounted with two particle sampling devices, one inside the cabin and the other outside. With the standard cellulose filter, the filtration efficiencies of submicron and respirable (>1 p,m) dust were 68 % and 86 %, respectively. However, with the cellulose/nanofiber composite filter, a higher reduction of approximately 92 % has been observed for both the submicron and respirable dusts. Besides, the results showed that submicron salt crystal preferentially collected on nanofibers (compared... 

Hung CH, Leung WWF (2011) Filtration of nano-aerosol using nanofiber filter under low Peclet number and transitional flow regime. Sep Purif Technol 79(l) 34-42, http //dx.doi.oig/ 10.1016/j.seppur.2011.03.008... 

Table 13.1 Major companies with electrospun nanofiber filters...

Jaroszczyk T, Petrik S, Donahue K (2009) Recent development in heavy duty engine air filtration and the role of nanofiber filter media. J KONES 16 207-216... 

Polymer-supported Ag nanoparticles have been widely investigated and provide potential applications as catalysts, photonic and electronic sensors, wound dressings, body wall repairs, augmentation devices, tissue scaffolds, and antimicrobial filters [15-22]. For these applications, Ag nanoparticles have to be supported in a biocompatible polymer system [23-26]. The electrospinning technique has often been adopted for the incorporation of Ag nanoparticles into polymer porous media. In this chapter, we review the preparation methods and properties of Ag nanoparticles incorporated into polymeric nanofibers and their applications in the fields of filtration, catalysis, tissue engineering and wound dressing. 

P. Tribolet, L. Kiwi-Minsker, Palladium on carbon nanofibers grown on metallic filters as novel structured catalyst, Catal. Today 105 (2005) 337. 

Xribolet, P. and Kiwi-Minsker, L. (2005) Carbon nanofibers grown on metallic filters as novel catalytic materials. Catal Today, 102, 15-22. 

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