Study on the Hydrophobic Property of Shark-Skin-Inspired Micro-Riblets

2014 ◽  
Vol 11 (2) ◽  
pp. 296-302 ◽  
Author(s):  
Danyang Zhao ◽  
Qianqian Tian ◽  
Minjie Wang ◽  
Yifei Jin
Keyword(s):  
Hydrophobic Property ◽  
Shark Skin

scholarly journals Utilization of Melt Fracture Phenomenon for the Preparation of Shark Skin Structured Hydrophobic Film

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4299
Author(s):  
Bin Tang ◽  
Yaoyu Yue ◽  
Zipeng Gai ◽  
Yao Huang ◽  
Ying Liu ◽  
...  
Keyword(s):  
Melt Fracture ◽  
Processing Parameter ◽  
Hydrophobic Property ◽  
Screw Speed ◽  
Shark Skin ◽  
Optimal Processing ◽  
Hierarchical Roughness ◽  
Single Screw Extruder ◽  
Processing Cost ◽  
Die Temperature

With the application of biomimetic shark skin microstructures with hydrophobicity in microfluidics, sensors and self-cleaning materials, microstructure processing methods are increasing. The preparation process has higher requirements for processing cost and efficiency. In this paper, linear low-density polyethylene (LLDPE) hydrophobic films were prepared with the help of melt fracture phenomenon. The equipment is a self-made single screw extruder. By adjusting the process parameters, the biomimetic shark skin structured LLDPE films with good hydrophobic property can be obtained. The surface microstructure shape of the product is related to kinds of additive, die temperature and screw speed. When AC5 was selected as an additive, the optimal processing parameter was found to be 160 °C die temperature and 80 r/min screw speed. A contact angle of 133° was obtained in this situation. In addition, the influences of die temperature and screw speed on the size of shark skin structure were also systematically investigated in this paper. It was found that the microstructure surface with hierarchical roughness had a better hydrophobic property.

The hydrodynamic behaviour of biologically inspired bristled shark skin vortex generator in submarine

2021 ◽  
Author(s):  
Elango Natarajan ◽  
Lídio Inácio Freitas ◽  
Goh Rui Chang ◽  
Ammar Abdulaziz Majeed Al-Talib ◽  
C.S. Hassan ◽  
...  
Keyword(s):  
Vortex Generator ◽  
Biologically Inspired ◽  
Shark Skin ◽  
Hydrodynamic Behaviour

Engineering Shark skin and other solutions

Nature ◽  
10.1038/22883 ◽  
1999 ◽  
Vol 400 (6744) ◽  
pp. 507-509 ◽  
Author(s):  
Philip Ball
Keyword(s):  
Shark Skin

In vivo anti-lipidemic and antioxidant potential of collagen peptides obtained from great hammerhead shark skin waste

2021 ◽  
Author(s):  
Divya K. Vijayan ◽  
Sreerekha Perumcherry Raman ◽  
Pavan Kumar Dara ◽  
Rosemol M. Jacob ◽  
Suseela Mathew ◽  
...  
Keyword(s):  
Antioxidant Potential ◽  
Shark Skin ◽  
Hammerhead Shark ◽  
Collagen Peptides

Spray Drying of Blue Shark Skin Protein Hydrolysate: Physical, Morphological, and Antioxidant Properties

2014 ◽  
Vol 32 (16) ◽  
pp. 1986-1996 ◽  
Author(s):  
Julio C. Rodríguez-Díaz ◽  
Renata V. Tonon ◽  
Míriam D. Hubinger
Keyword(s):  
Spray Drying ◽  
Protein Hydrolysate ◽  
Antioxidant Properties ◽  
Blue Shark ◽  
Shark Skin ◽  
Skin Protein

The Biomimetic Shark Skin Optimization Design Method for Improving Lubrication Effect of Engineering Surface

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Yan Lu ◽  
Meng Hua ◽  
Zuomin Liu
Keyword(s):  
Coefficient Of Friction ◽  
Optimization Design ◽  
Design Method ◽  
Theory Model ◽  
Tribological Performance ◽  
Design Parameters ◽  
Width Ratio ◽  
Textured Surface ◽  
Shark Skin ◽  
Biomimetic Surface

Nature has long been an important source of inspiration for mankind to develop artificial ways to mimic the remarkable properties of biological systems. In this work, a new method was explored to fabricate a biomimetic engineering surface comprising both the shark-skin, the shark body denticle, and rib morphology. It can help reduce water resistance and the friction contact area as well as accommodate lubricant. The lubrication theory model was established to predict the effect of geometric parameters of a biomimetic surface on tribological performance. The model has been proved to be feasible to predict tribological performance by the experimental results. The model was then used to investigate the effect of the grid textured surface on frictional performance of different geometries. The investigation was aimed at providing a rule for deriving the design parameters of a biomimetic surface with good lubrication characteristics. Results suggest that: (i) the increase in depression width ratio Λ decreases its corresponding coefficient of friction, and (ii) the small coefficient of friction is achievable when Λ is beyond 0.45. Superposition of depth ratio Γ and angle's couple under the condition of Λ < 0.45 affects the value of friction coefficient. It shows the decrease in angle decreases with the increase in dimension depth Γ.

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