posted on 2021-06-22, 17:37authored byXinting Han, Xiao Gong
Multifunctional
superamphiphobic cotton fabrics are in high demand.
However, preparation of such fabrics is often difficult or complicated.
Herein, a novel superamphiphobic fabric is constructed by a simple
one-pot method with an in situ growth process. Under suitable alkaline
conditions, dopamine (DA) can be oxidized to benzoquinone. Meanwhile,
3-aminopropyltriethoxysilane (APTES), 1H,1H,2H,2H-perfluorodecyltriethoxysilane
(FAS-17) molecules undergo the hydrolysis reaction and bond together.
Besides, benzoquinone can react with APTES by Schiff base and hollow
nanoclusters can be finally obtained because of the steric hindrance
effect of benzene ring and long alkyl chain. Such nanoclusters are
formed on the surface of fabric, which endows the fabric with extreme
liquid repellence. The effects of pH value and DA concentration on
the surface morphology and lyophobic properties of the fabric are
systematically studied. The water and pump oil contact angles of the
superamphiphobic fabric obtained under the optimal reaction conditions
can reach 160 and 151°, respectively. The lyophobicity of the
fabric is maintained even after undergoing various harsh tests, showing
significant durability and stability. In addition, the superamphiphobic
fabric exhibits good antifouling and strong buoyancy ability. The
superamphiphobic fabric can load 35 and 27.4 times its own weight
in water and oil, respectively, which shows great potential in the
field of functional textiles such as swimming suits, protective clothing,
and life jackets in the future.