1 research outputs found
Durable, Transparent, and Hot Liquid Repelling Superamphiphobic Coatings from Polysiloxane-Modified Multiwalled Carbon Nanotubes
Although encouraging
progress in the field of superamphiphobic
coatings has been obtained, the superamphiphobic coatings with high
durability, transparency, and repellency to hot liquids are very rare.
Here, durable, transparent, and hot liquid-repelling superamphiphobic
coatings were successfully prepared using polysiloxane-modified multiwalled
carbon nanotubes (MWCNTs@POS) as the templates. The hydrolytic condensation
of <i>n</i>-hexadecyltrimethoxysilane (HDTMS) and tetraethoxysilane
on the surface of MWCNTs formed MWCNTs@POS, which are highly dispersible
in toluene. The superamphiphobic coatings were prepared by spray-coating
the homogeneous suspension of MWCNTs@POS in toluene onto glass slides,
calcination in air to form the silica nanotubes (SNTs), and then modification
with 1<i>H</i>,1<i>H</i>,2<i>H</i>,2<i>H</i>-perfluorodecyltrichlorosilane in dry toluene. The changes
in the surface microstructure, surface chemical composition, and wettability
were characterized by various techniques such as scanning electron
microscopy, transmission electron microscopy, and X-ray photoelectron
spectroscopy. It was found that the microstructures of the SNTs have
great influences on superamphiphobicity and transparency of the coatings
and can be regulated by the concentration of HDTMS and the diameter
of MWCNTs. The SNTs with tunable wall thickness and diameter could
be obtained using the method. The superamphiphobic coatings showed
high contact angles and low sliding angles for various cool and hot
liquids of different surface tensions. The superamphiphobic coatings
also exhibited high transparency and comprehensive durability