Robust adhesion of droplets via heterogeneous dynamic petal effects

Abstract

Hypothesis Bionics and dynamic interface wetting intensely appeal to many research communities due to their unique practical implications. The rose petals had a highly robust dynamic water-retaining capacity under heavy precipitation. We predicted that the roses became more "hydrophilic" at higher Weber numbers.

Effects of eigen and actual frequencies of soft elastic surfaces on droplet rebound from stationary flexible feather vanes

“…The effects of the elasticity on the droplet impact are analyzed from the viewpoint of the inherent frequencies(i.e., the eigenfrequencies) of the droplet and the elastic system. The eigenfrequency of the water drop impacting rigid hydrophobic/superhydrophobic surfaces related to the surface tension coefficient γ is defined as [9,12]: , 11), the water viscosity doesn't affect the eigenfrequency of the water drop.…”

“…Numerous studies have been focused on the wetting dynamics when droplets impact on different kinds of substrates, including macroscopically flat surfaces [4][5][6][7][8][9] or surfaces with a rough microstructure (pillar array, grooved texture, etc.) [10][11][12][13][14][15][16][17][18][19]. However, to date, most studies have been investigated droplets that impact on rigid surfaces.…”

Studies on Hydrophobic Silica/Silicone Rubber Composite Microspheres with Dual-Size Microstructures

“…For example, water droplets on rose petals satisfy the superhydrophobic static contact angle, but the water droplets do not easily roll off the surface and have high adhesion. This phenomenon is called the “rose petal effect” . The high adhesion of rose petals is due to the Cassie impregnation state of water droplets on the surface, which can penetrate the micro- or nanostructures.…”

A strategy for preparing controllable, superhydrophobic, strongly sticky surfaces using SiO2@PVDF raspberry core–shell particles

“…[16][17][18][19][20][21][22] This is generally achieved using the rose petal effect, which corresponds to the Wenzel wetting state. 23 Such surfaces are fabricated by chemical etching, plasma treatment, photolithography, chemical vapor deposition, chemical coating, and using colloidal particles. [24][25][26][27][28][29][30] The structured colloidal coatings have high CAs because the area of solids and gases in the contact region between the droplet and the structured surface can be easily controlled.…”

“… 16–22 This is generally achieved using the rose petal effect, which corresponds to the Wenzel wetting state. 23 Such surfaces are fabricated by chemical etching, plasma treatment, photolithography, chemical vapor deposition, chemical coating, and using colloidal particles. 24–30 …”