Hydrocarbon fluid-water separation
AssigneeDonaldson Company, Inc.
InventorsBradly G. Hauser, Stephen K. Sontag, Davis B. Moravec, Stuti S. Rajgarhia, Andrew J. Dallas, Vijay K. Kapoor, Aflal Rahmathullah, Charles S. Christ, Joseph M. Block
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Abstract
A substrate for use in a filter media including, for example, in a hydrocarbon fluid-water separation filter; methods of identifying the substrate; methods of making the substrate; methods of using the substrate; and methods of improving the roll off angle of the substrate. In some embodiments, the substrate includes a hydrophilic group-containing polymer or a hydrophilic group-containing polymer coating.
Claims20
A filter media comprising a substrate, wherein the substrate comprises
- a surface having a roll off angle in a range of 50 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the surface is immersed in toluene.
A method of treating a material comprising a surface, the method comprising
- treating the surface to form a treated surface,
- wherein the treated surface has a roll off angle in a range of 50 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the surface is immersed in toluene.
A method for identifying a material suitable for hydrocarbon fluid-water separation, the method comprising determining the roll off angle of a droplet on a surface of the material, wherein the material is immersed in a fluid comprising a hydrocarbon, and wherein the roll off angle is in a range of 40 degrees to 90 degrees.
Dependencies are inferred from the claim text.