Functional textiles with superhydrophobicity and high
adhesion
to water, called parahydrophobic, are attracting increasing attention
from industry and academia. The hierarchical (micronanoscale) surface
patterns in nature provide an excellent reference for the manufacture
of parahydrophobic functional textiles. However, the replication of
the complex parahydrophobic micronanostructures in nature exceeds
the ability of traditional manufacturing strategies, which makes it
difficult to accurately manufacture controllable nanostructures on
yarn and textiles. Herein, a two-photon femtosecond laser direct writing
strategy with nanoscale process capability was utilized to accurately
construct the functional parahydrophobic yarn with a diameter of 900
μm. Inspired by rose petals, the parahydrophobic yarn is composed
of a hollow round tube, regularly arranged micropapillae (the diameter
is 109 μm), and nanofolds (the distance is 800 nm) on papillae.
The bionic yarn exhibited a superior parahydrophobic behavior, where
the liquid droplet not only was firmly adhered to the bionic yarn
at an inverted angle (180°) but also presented as spherical on
the yarn (the maximum water contact angle is 159°). The fabric
woven by the bionic yarn also exhibited liquid droplet-catching ability
even when tilted vertically or turned upside down. Based on the excellent
parahydrophobic function of bionic yarn, we demonstrated a glove that
has very wide application potential in the fields of water droplet-based
transportation, manipulation, microreactors, microextractors, etc.