Directional droplet-actuation and fluid-resistance reduction performance on the bio-inspired shark-fin-like superhydrophobic surface

Thriving artificial underwater drag-reduction materials inspired from aquatic animals: progresses and challenges

“…An et al , based on the method of roller imprinting, transferred the pressed shark fin-shaped figure to the surface of the PDMS through soft lithography, and finally, a fin-shaped composite material was obtained by hydrophobic treatment, which effectively realized the directional driving of the droplets and drag reduction performance. 157 Using wire masks as a rolling cylinder, it can be pressed to form an ellipsoid-shaped micro-dimples on the polymer surfaces. Simple, fast, and rapid prototyping are considered as the advantages of the modified method and increase the contact angle and have an excellent drag-reduction effect, as reflected in the surface test.…”

“…14 , by using the bio-replicated rolling method, it is effective to produce a large-area continuous drag reduction surface and truly reproduce the biological surface, which has some advantages including simple fabrication and low cost. 157,172 However, roll forming surfaces also have low accuracy and long manufacturing cycles. Rapid prototyping 3D printing technology further improves the accuracy.…”

Bionic research on Paramisgurnus dabryanus scales for drag reduction

“…Munther et al 23 prepared bionic placoid scales produced by micro-molding technique, which utilizes etched silicon molds, can deter microorganism settlement. An et al 24 prepared a bionic shark fin negative template by rolling it on the PVC board, and the bionic surface obtained by PDMS demoulding could effectively realize the drag reduction performance. Meanwhile, the simplicity of the template method and the precision of the prepared surface still need to be improved.…”

Study on the Drag Reduction Characteristics of the Surface Morphology of Paramisgurnus dabryanus Loach

“…Lloyd [21] printed two arrays of denticles on a flat plate and obtained a drag reduction of 2%. The bionic studies on massive aquatic creatures include those on rectangular, V-shaped, U-shaped and L-shaped biomimetic shark scales [22,23]. There are also some studies on waveform non-smooth surfaces [24][25][26][27].…”