There is disclosed a material for separating a liquid from a mixture of at
least two liquids, for example, for separating water from fuel. In one
embodiment, the material comprises a fibrous substrate and carbon
nanotubes, both of which have at least one functional group attached
thereto. There is also disclosed a method for separating one liquid from
another liquid using the disclosed material. In one embodiment, the
method comprises flowing a mixture of liquids through the disclosed
material, and either coalescing or separating at least one liquid by use
of the carbon nanotubes.