No abstract

No abstract

One of the major causes of diesel engine maintenance problems is water contamination in fuels. This paper discusses fabrication, characterization, and testing of non-woven glass fiber mats augmented with an electrospun layer of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) fibers for the separation of secondary water dispersions from ultralow sulfur diesel. The PVDF-HFP fibers had an average fiber diameter of 334 nm. All PVDF-HFP layers had water contact angles greater than 150°with relatively low hysteresis values, making them superhydrophobic. Water separation experiments showed that glass fiber media augmented with electrospun PVDF-HFP fiber mats significantly improved water separation, with water removal efficiencies reaching 99%, as compared to glass fiber media without the PVDF-HFP layer.

No abstract

This paper discusses the fabrication and characterization of electrospun nanofiber mats made up of poly(4-methyl-1-pentene) polymer. The polymer was electrospun in different weight concentrations. The mats were characterized by their basis weight, fiber diameter distribution, contact angles, contact angle hysteresis, and air permeability. All of the electrospun nonwoven fiber mats had water contact angles greater than 150 degrees making them superhydrophobic. The permeabilities of the mats were empirically fitted to the mat basis weight by a linear relation. The experimentally measured air permeabilities were significantly larger than the permeabilities predicted by the Kuwabara model for fibrous media.