Underwater Drag-Reducing Effect of Superhydrophobic Submarine Model

Zhang, Songsong; Ouyang, Xiaoying; Li, Jie; Gao, Shan; Han, Shihui; Liu, Lianhe; Wei, Hao

doi:10.1021/la504451k

Cited by 101 publications

(42 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An underwater drag‐reducing effect of large superhydrophobic submarine models with a feature size of 3.5 cm × 3.7 cm × 33.0 cm was tested through sailing experiments of submarine models and the drag reduction rate reached as high as 15%. Several comparison experiments showed that with the reduced power supply of the submarine model, the average velocity decreased and the average sailing velocities of superhydrophobic submarine models were always higher than those of the normal ones for the same power supply.…”

Section: Applicationmentioning

confidence: 99%

See 1 more Smart Citation

Wetting Models and Working Mechanisms of Typical Surfaces Existing in Nature and Their Application on Superhydrophobic Surfaces: A Review

Jiaqiang

Deng

et al. 2017

Adv Materials Inter

105

View full text Add to dashboard Cite

decades, researchers have shown great interests in bionics, which was a new multidisciplinary subject inspired by biological characteristics and features to imitate it to build technology devices. [1] With the rise of biomimetic biomaterial researches, a lot of attention was paid on the observation of living organism, especially on plant leaves, such as lotus, rice, taro leaves, etc. [2] As the development of scanning electron microscope (SEM), a wealth of data dealing with SEM of plant surface has been published since 1960s. [3] The cuticular structure was investigated with regard to function, and substances that were secreted onto the cuticle had great effects on the surface properties, while intracuticular waxes were the main barrier to wettability. [4] Some kinds of special wettability like superhydrophobicity and superhydrophilicity were also found in other surfaces, such as self-cleaning lotus leaf, [5] hydrophilicity of red rose petals, [6,7] the anisotropic dewetting behavior on rice leaf, [8,9] hydrophobicity of shark skin, [10] gecko toe, [11] insect wings, [12] etc., and striking superhydrophobic force provided by a water strider's legs, [13] and they were all related to the unique microstructures on their surface. In fact, the special wettability of surfaces is attributed to the interaction of both the surface microstructures and surface covers. As the development and progress of the observation device, smaller nanosized structures were found on the microstructure, and better properties of multiscale hierarchical structure was shown then. [14] Wetting is a phenomenon that solid interface was transferred from solid-gas interface to solid-liquid interface, wettability was a kind of ability that a liquid could be unfolded on one solid surface. The wettability of surface could be characterized by contact angle (CA) of interface. Sliding angle (SA) and contact angle hysteresis were introduced to evaluate the highly valued superhydrophobicity and superhydrophilicity of surfaces. Superhydrophilicity was defied as that of CA was smaller than 5°, superhydrophobicity was defied as that of CA was greater than 150°, as well as a really small sliding angle. It is worth noting that many researchers applied themselves to excavate the theories under the phenomena. Young's equation, Wenzel equation, and Cassie-Baxter equation [15,16] were the representations of hundreds years of research results. Improving and developing Surfaces of plants and animals are evolved to optimal states to accommodate environments better after billions of years of natural selection. As the development of further study on bionics, surfaces with special wetting properties in nature are discovered, extremely related to the micro-/nanostructures on surface. The wetting models and wetting mechanism of several surfaces in nature are investigated, followed by lifting the veil of superhydrophobic field. Various facile, effective, and convenient methods for fabricating superhydrophobic surfaces are obtained and optimized in scientific research and ...

show abstract

Section: Applicationmentioning

confidence: 99%

Section: Applicationmentioning

confidence: 99%

Wetting Models and Working Mechanisms of Typical Surfaces Existing in Nature and Their Application on Superhydrophobic Surfaces: A Review

Jiaqiang

Deng

et al. 2017

Adv Materials Inter

105

View full text Add to dashboard Cite

show abstract

“…Superhydrophobic surfaces that show extremely strong water repellency have attracted wide interest due to their extensive applications, especially in the fields including self-cleaning 1–2 and anti-fouling surfaces, 3–5 moisture-proof electronics, 6 and drag-reduction for marine vessels, 7–10 among others. 11 While the existing superhydrophobic materials are generally realized by combinations of delicate microscale and nanoscale heterogeneous structures, the resulting superhydrophobicity is vulnerable to scraping or abrasion due to the destruction of the brittle structures.…”

Section: Introductionmentioning

confidence: 99%

A highly stretchable and robust non-fluorinated superhydrophobic surface

Yao

Hou

et al. 2017

J. Mater. Chem. A

View full text Add to dashboard Cite

Superhydrophobic surface simultaneously possessing exceptional stretchability, robustness, and non-fluorination is highly desirable in applications ranging from wearable devices to artificial skins. While conventional superhydrophobic surfaces typically feature stretchability, robustness, or non-fluorination individually, co-existence of all these features still remains a great challenge. Here we report a multi-performance superhydrophobic surface achieved through incorporating hydrophilic micro-sized particles with pre-stretched silicone elastomer. The commercial silicone elastomer (Ecoflex) endowed the resulting surface with high stretchability; the densely packed micro-sized particles in multi-layers contributed to the preservation of the large surface roughness even under large strains; and the physical encapsulation of the microparticles by silicone elastomer due to the capillary dragging effect and the chemical interaction between the hydrophilic silica and the elastomer gave rise to the robust and non-fluorinated superhydrophobicity. It was demonstrated that the as-prepared fluorine-free surface could preserve the superhydrophobicity under repeated stretching-relaxing cycles. Most importantly, the surface’s superhydrophobicity can be well maintained after severe rubbing process, indicating wear-resistance. Our novel superhydrophobic surface integrating multiple key properties, i.e. stretchability, robustness, and non-fluorination, is expected to provide unique advantages for a wide range of applications in biomedicine, energy, and electronics.

show abstract

“…Recent work in this context has primarily dealt with superhydrophobic surfaces [3][4][5][6] , that utilise an air layer trapped in nanoscale roughness to produce slip. A key issue with such superhydrophobic surfaces is their ability to retain a trapped gas layer and thus maintain the slip.…”

Section: Introductionmentioning

confidence: 99%

Fluid mobility over corrugated surfaces in the Stokes regime

et al. 2016

View full text Add to dashboard Cite

An exact solution is found for laminar fluid flow along the grooves of a family of surfaces whose shape is given by the Lambert W-function. This simple solution allows for the slip length in the direction parallel to the grooves to be calculated exactly. With this analytical model we establish the regime of validity for a previously untested perturbation theory intended for calculating the surface mobility tensor of arbitrary periodic surfaces, finding that it compares well to the exact expression for nearly all choices of parameters of the conformal map. To test this perturbation theory further, the mobility tensor is evaluated for a simple sinusoidal surface for flow both parallel and perpendicular to the grooves, finding that the perturbation theory is less accurate in the latter of these two cases.

show abstract

Underwater Drag-Reducing Effect of Superhydrophobic Submarine Model

Cited by 101 publications

References 52 publications

Wetting Models and Working Mechanisms of Typical Surfaces Existing in Nature and Their Application on Superhydrophobic Surfaces: A Review

Wetting Models and Working Mechanisms of Typical Surfaces Existing in Nature and Their Application on Superhydrophobic Surfaces: A Review

A highly stretchable and robust non-fluorinated superhydrophobic surface

Fluid mobility over corrugated surfaces in the Stokes regime

Contact Info

Product

Resources

About