3 research outputs found
Biomimetic Superhydrophobic Engineering Metal Surface with Hierarchical Structure and Tunable Adhesion: Design of Microscale Pattern
Lotus
leaves and rose petals are both typical natural superhydrophobic
surfaces, with low and high adhesion, respectively. This fact inspires
us to prepare superhydrophobic surfaces with different levels of adhesion
on iron by mimicking their hierarchical structures through three simple
steps: abrasion, calcination, and modification. A uniform and stable
superhydrophobic iron surface with excellent adaptability and wearability
can be obtained, and its adhesion is tunable. The results confirmed
that superhydrophobicity and adhesion are both dependent on the synergy
of the microscale and nanoscale patterns of the hierarchical structure
generated by the designed abrasion and thermal treating. The adhesion
level can be controlled by simply adjusting the abrasion program to
obtain the desired microscale pattern with a proper ratio of height-to-width
of the microstructure. This easy, inexpensive, and clean three-step
method is widely applicable for different engineering metals and alloys
and suitable for large-scale production
Superhydrophobic Anodized Fe Surface Modified with Fluoroalkylsilane for Application in LiBr–Water Absorption Refrigeration Process
LiBr
refrigerating systems are frequently used in industry, but
the pipelines are easily corroded or blocked by the LiBr solution
with high flow resistance. Here, a superhydrophobic Fe surface was
proposed and tested for applicability. After constructing a rough
Fe<sub>2</sub>O<sub>3</sub> nanotube array on a Fe surface by the
anodization process, a superhydrophobic Fe surface was obtained by
silane modification. The as-prepared superhydrophobic surface exhibited
excellent repulsion to LiBr solutions. The modified Fe foil showed
a 3.35% decrease in thermal conductivity but a 99.2% improvement of
anticorrosion protection efficiency. LiBr crystals deposited on this
surface were easily detached. The flow resistance along the superhydrophobic
surface was reduced to 50% of that along a pure Fe surface. The operation
temperature of the system was broadened due to low blockage risk.
The excellent thermal conductivity, anticorrosivity, drag reduction,
and antifouling performance of the superhydrophobic Fe surface exhibits
promise for industrial application
Biomimetic Superhydrophobic Engineering Metal Surface with Hierarchical Structure and Tunable Adhesion: Design of Microscale Pattern
Lotus
leaves and rose petals are both typical natural superhydrophobic
surfaces, with low and high adhesion, respectively. This fact inspires
us to prepare superhydrophobic surfaces with different levels of adhesion
on iron by mimicking their hierarchical structures through three simple
steps: abrasion, calcination, and modification. A uniform and stable
superhydrophobic iron surface with excellent adaptability and wearability
can be obtained, and its adhesion is tunable. The results confirmed
that superhydrophobicity and adhesion are both dependent on the synergy
of the microscale and nanoscale patterns of the hierarchical structure
generated by the designed abrasion and thermal treating. The adhesion
level can be controlled by simply adjusting the abrasion program to
obtain the desired microscale pattern with a proper ratio of height-to-width
of the microstructure. This easy, inexpensive, and clean three-step
method is widely applicable for different engineering metals and alloys
and suitable for large-scale production