Superhydrophobic Ti6Al4V surfaces with regular array patterns for anti-icing applications

RSC Advances ◽  
2015 ◽  
Vol 5 (41) ◽  
pp. 32813-32818 ◽  
Author(s):  
Yizhou Shen ◽  
Jie Tao ◽  
Haijun Tao ◽  
Shanlong Chen ◽  
Lei Pan ◽  
...  
Keyword(s):  
Superhydrophobic Surface ◽  
Hierarchical Structures ◽  
Hydrothermal Growth ◽  
Regular Array

We present a route to fabricate a robust anti-icing superhydrophobic surface containing the hierarchical structures of microscale array patterns (built by micromachining) and nanohairs (prepared via hydrothermal growth) on a Ti6Al4V substrate.

scholarly journals Preparation of superhydrophobic surfaces with micro/nano alumina molds

RSC Advances ◽  
2018 ◽  
Vol 8 (64) ◽  
pp. 36697-36704 ◽  
Author(s):  
Takashi Yanagishita ◽  
Kaito Murakoshi ◽  
Toshiaki Kondo ◽  
Hideki Masuda
Keyword(s):  
Superhydrophobic Surface ◽  
Porous Alumina ◽  
Hierarchical Structures ◽  
Superhydrophobic Surfaces ◽  
Anodic Porous Alumina ◽  
Nano Alumina

Superhydrophobic surface with hierarchical structures prepared by nanoimprinting using anodic porous alumina molds.

Water-Repellent Stability of Superhydrophobic Materials under Hydrostatic Pressure

2014 ◽  
Vol 633-634 ◽  
pp. 764-768
Author(s):  
Jian Ye Huang ◽  
Feng Hui Wang
Keyword(s):  
Hydrostatic Pressure ◽  
Superhydrophobic Surface ◽  
Hierarchical Structures ◽  
Water Repellency ◽  
Total Reflection ◽  
Wetting Transition ◽  
Water Repellent ◽  
Lotus Leaf ◽  
Stability Of Water ◽  
Air Film

Keeping the water-repellent stability of superhydrophobic surface is necessary in application. Based on the total reflection of Cassie interface and vacuum technique, the superhydrophobic stability of the lotus leaf and an artificial material was investigated. The results show that during the Cassie-Wenzel transition, primary wetting transition occurs at a certain pressure that in accordance with theoretical prediction. However, when the air film is entrapped between microstructures, stability of water-repellency was greatly enhanced, and part of the wetting transition can be recovered when the pressure was released. Due to the micro-and nanoscale hierarchical structures, the lotus leaf shows better water-repellent stability and dewetting property than the artificial superhydrophobic surface when the hydrostatic pressure was applied and released.

scholarly journals Facile Fabrication of a Superhydrophobic Surface with Robust Micro-/Nanoscale Hierarchical Structures on Titanium Substrate

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1509
Author(s):  
Shuliang Dong ◽  
Zhenlong Wang ◽  
Libao An ◽  
Yaogang Li ◽  
Baozhong Wang ◽  
...  
Keyword(s):  
Superhydrophobic Surface ◽  
Mechanical Stability ◽  
Electrical Discharge Machining ◽  
Electrochemical Etching ◽  
Titanium Substrate ◽  
Hierarchical Structures ◽  
Droplet Microfluidics ◽  
Superhydrophobic Surfaces ◽  
Metallic Surface ◽  
Water Contact

A superhydrophobic surface with robust structures on a metallic surface could improve its application in various harsh conditions. Herein, we developed a new strategy to fabricate robust micro-/nanoscale hierarchical structures with electrical discharge machining and electrochemical etching on a titanium substrate. After modification by fluorinated silane, the static water contact angle and slide angle of the surface could reach 162 ± 2° and 4 ± 1°, respectively. The superhydrophobic surfaces showed good corrosion resistance and mechanical stability after scratching with sandpapers. In addition, the superhydrophobic surfaces had good self-cleaning performance even in an acidic environment as well as the potential to be used as guiding tracks in droplet microfluidics and lab-on-a-chip systems. These results are expected to be helpful in designing the surface of liquid float gyroscope parts.

Relationships between hierarchical structure and properties in macromolecular systems

1987 ◽  
Vol 45 ◽  
pp. 440-443
Author(s):  
E. Baer
Keyword(s):  
Uniaxial Tension ◽  
Hierarchical Structure ◽  
Inorganic Material ◽  
Hierarchical Structures ◽  
Bone Collagen ◽  
Structure And Properties ◽  
Connective Tissues ◽  
Scale Level ◽  
Fibrous Protein ◽  
Macromolecular Systems

The most advanced macromolecular materials are found in plants and animals, and certainly the connective tissues in mammals are amongst the most advanced macromolecular composites known to mankind. The efficient use of collagen, a fibrous protein, in the design of both soft and hard connective tissues is worthy of comment. Very crudely, in bone collagen serves as a highly efficient binder for the inorganic hydroxyappatite which stiffens the structure. The interactions between the organic fiber of collagen and the inorganic material seem to occur at the nano (scale) level of organization. Epitatic crystallization of the inorganic phase on the fibers has been reported to give a highly anisotropic, stress responsive, structure. Soft connective tissues also have sophisticated oriented hierarchical structures. The collagen fibers are “glued” together by a highly hydrated gel-like proteoglycan matrix. One of the simplest structures of this type is tendon which functions primarily in uniaxial tension as a reinforced elastomeric cable between muscle and bone.

Biomimetic materials: An introduction

1992 ◽  
Vol 50 (2) ◽  
pp. 1020-1021 ◽  
Author(s):  
M. Sarikaya ◽  
J. T. Staley ◽  
I. A. Aksay
Keyword(s):  
Self Assembly ◽  
Structural Control ◽  
Hierarchical Structures ◽  
Ceramic Composites ◽  
Advanced Materials ◽  
Length Scale ◽  
Spider Webs ◽  
Biomimetic Materials ◽  
Synthetic Materials ◽  
All Ceramic

Biomimetics is an area of research in which the analysis of structures and functions of natural materials provide a source of inspiration for design and processing concepts for novel synthetic materials. Through biomimetics, it may be possible to establish structural control on a continuous length scale, resulting in superior structures able to withstand the requirements placed upon advanced materials. It is well recognized that biological systems efficiently produce complex and hierarchical structures on the molecular, micrometer, and macro scales with unique properties, and with greater structural control than is possible with synthetic materials. The dynamism of these systems allows the collection and transport of constituents; the nucleation, configuration, and growth of new structures by self-assembly; and the repair and replacement of old and damaged components. These materials include all-organic components such as spider webs and insect cuticles (Fig. 1); inorganic-organic composites, such as seashells (Fig. 2) and bones; all-ceramic composites, such as sea urchin teeth, spines, and other skeletal units (Fig. 3); and inorganic ultrafine magnetic and semiconducting particles produced by bacteria and algae, respectively (Fig. 4).

Electron Optical Study of Surface Morphologies of Crystals

1980 ◽  
Vol 38 ◽  
pp. 376-377
Author(s):  
Sumio Iijima ◽  
Tung Hsu
Keyword(s):  
Thin Film ◽  
Optical Study ◽  
Regular Array ◽  
Surface Steps ◽  
Diffracted Waves ◽  
Image Position ◽  
Surface Morphologies

Suppose the thickness of a thin film of a crystal varies periodically like a regular array of surface steps, kinematical intensities of diffracted waves from this crystal are modulated by a shape transform,

Hierarchical structures lead to high thermoelectric performance in Cum+nPb100SbmTe100Se2m (CLAST)

2021 ◽  
Author(s):  
Siqi Wang ◽  
Yu Xiao ◽  
Yongjin Chen ◽  
Shang Peng ◽  
Dongyang Wang ◽  
...  
Keyword(s):  
Hierarchical Structures ◽  
Phonon Transport ◽  
Thermoelectric Performance

Hierarchical microstructures lead to high thermoelectric performance in Cum+nPb100SbmTe100Se2m (CLAST) through synergistically optimizing carrier and phonon transport.

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