Definitions for Hydrophilicity, Hydrophobicity, and …
2014年2月20日 · The most recognizable definitions in surface science are hydrophobicity and hydrophilicity. In the Greek words, hydro means water, philicity means affinity, and phobicity means lack of affinity. In the scientific community, we have come to accept the definition that a surface is hydrophobic when its static water contact angle θ is >90° and is ...
Hydrophobic Surface - an overview | ScienceDirect Topics
Hydrophobic surface is a surface that has the ability to repel water and has a static water contact angle larger than 90 degrees [1]. In nature, the hydrophobic surface can be seen on lotus leaves, and the phenomenon is called “lotus effect.”
Explained: Hydrophobic and hydrophilic - MIT News
2013年7月16日 · Hydrophilic and hydrophobic materials are defined by the geometry of water on a flat surface — specifically, the angle between a droplet’s edge and the surface underneath it. This is called the contact angle.
New insights into hydrophobicity at nanostructured surfaces ...
2022年2月14日 · This review deals with different aspects of hydrophobicity at nanostructured surfaces. Theoretical and geometric effects as well as those of surface feature geometry on hydrophobicity are explored in this article. This review includes surface modification methods used to change surface hydrophobicity and effect on adhesion of cells as nano ...
Direct quantification of nanoparticle surface hydrophobicity
2018年9月6日 · Here we describe a method for the direct quantification of the surface energy and hydrophobicity of nanomaterials. The quantification is obtained by comparing the nanomaterial binding affinity...
Superhydrophobic surfaces: a review on fundamentals, …
2018年1月4日 · Superhydrophobicity is the tendency of a surface to repel water drops. A surface is qualified as a superhydrophobic surface only if the surface possesses a high apparent contact angle (>150°), low contact angle hysteresis (<10°), low sliding angle (<5°) and high stability of Cassie model state.
Design of robust superhydrophobic surfaces | Nature
2020年6月3日 · Here we show that robust superhydrophobicity can be realized by structuring surfaces at two different length scales, with a nanostructure design to provide water repellency and a microstructure...
Measurement of the surface hydrophobicity of engineered …
Determination of the surface hydrophobicity or wettability of nanomaterials and nanoparticles (NPs) is often challenged by the heterogeneous properties of NPs that vary with particle size, shape, surface charge, aggregation states, and surface sorption or coating. This study first summarized inherent limitat
Hydrophilicity, Hydrophobicity - SpringerLink
2016年1月1日 · The degree to which a surface either attracts or repels water can be termed, respectively, the hydrophilicity or the hydrophobicity of that surface. Polar liquids like water and alcohols interact more strongly with hydrophilic surfaces.
Surface hydrophobicity: effect of alkyl chain length and …
2020年11月9日 · Water contact angle and inverse gas chromatography results show that the alkyl chain length is essential for controlling hydrophobicity, as the octyl-functionalised nanoparticles were highly hydrophobic (water contact angle = 150.6° ± 6.6°), whereas the methyl-functionalised nanoparticles were hydrophilic (i.e., water contact angle = 0 ...