A gradient material comprising at least two types of nanofibers
distributed non-uniformly throughout the material to form one or more
gradients is provided. In one embodiment, the at least two types of
nanofibers intertwine to form a single layer of material, i.e., are at
least partially physically intertwined, i.e., entangled with one another
in a multi-component material. Such intertwining can occur when both
types of nanofibers are deposited substantially simultaneously in an
overlapping region. In another embodiment, the at least two types of
nanofibers combine to form a plurality of layers. The nanofibers can be
electrospun fibers. The material can have a gradient in the planar and/or
thickness directions. Embodiments of the invention also provide processes
for producing the gradient nanofiber material. The materials are useful
for any type of disposable garment, wipe, hospital garment, face mask,
sterile wrap, air filter, water filter and so forth. Materials described
herein can provide strong and varying surface effects, such as wicking.
In one embodiment, hydrophobic fibers have a sufficiently small diameter
to create a lotus effect.