Molecule or surface that has no attraction to water
For other uses, see Hydrophobia (disambiguation).
165 degree water contact angle on a surface modified using plasma technology system surface chemistry. The contact angle is the red angle plus 90 degrees.Dew drop on a hydrophobic leaf surfaceCutting a water droplet using a superhydrophobic knife on superhydrophobic surfacesWater drops on the hydrophobic surface of grass
In chemistry, hydrophobicity is the physical property of a molecule that is seemingly repelled from a mass of water (known as a hydrophobe).[1] In contrast, hydrophiles are attracted to water.
Hydrophobic molecules tend to be nonpolar and, thus, prefer other neutral molecules and nonpolar solvents. Because water molecules are polar, hydrophobes do not dissolve well among them. Hydrophobic molecules in water often cluster together, forming micelles. Water on hydrophobic surfaces will exhibit a high contact angle.
Examples of hydrophobic molecules include the alkanes, oils, fats, and greasy substances in general. Hydrophobic materials are used for oil removal from water, the management of oil spills, and chemical separation processes to remove non-polar substances from polar compounds.[2]
Hydrophobic is often used interchangeably with lipophilic, "fat-loving". However, the two terms are not synonymous. While hydrophobic substances are usually lipophilic, there are exceptions, such as the silicones and fluorocarbons.[citation needed]
The term hydrophobe comes from the Ancient Greek ὑδρόφοβος (hydróphobos), "having a fear of water", constructed from Ancient Greek ὕδωρ (húdōr) 'water', and Ancient Greek φόβος (phóbos) 'fear'.[3]
^Aryeh Ben-Na'im Hydrophobic Interaction Plenum Press, New York, ISBN 0-306-40222-X
^Liddell, H.G. & Scott, R. (1940). A Greek-English Lexicon. revised and augmented throughout by Sir Henry Stuart Jones. with the assistance of. Roderick McKenzie. Oxford: Clarendon Press.
molecule that is seemingly repelled from a mass of water (known as a hydrophobe). In contrast, hydrophiles are attracted to water. Hydrophobic molecules...
the free dictionary. Hydrophobia or hydrophobe may refer to: Aquaphobia, a psychological fear of water Hydrophobe, a term used in chemistry to describe...
essential to life. Substances for which this effect is observed are known as hydrophobes. Amphiphiles are molecules that have both hydrophobic and hydrophilic...
to water molecules and tends to be dissolved by water. In contrast, hydrophobes are not attracted to water and may seem to be repelled by it. Hygroscopics...
Water supply Hydrophore (zoology), see Haleciidae Hydraulic accumulator Hydrophobe Hydrophone This disambiguation page lists articles associated with the...
multiplied by 300, indicates the approximate molecular weight of the hydrophobe; and the last digit x 10 gives the percentage polyoxyethylene content...
Superhydrophobia) can be used for chemical and scientific purposes. See Hydrophobe page. Dunglison RJ (1895). A dictionary of medical science: containing...
symptoms. A specific phobia to water is called aquaphobia instead. A hydrophobe is a chemical compound that repels water. Similarly, photophobia usually...
perfluorobutanesulfonate (also called nonaflate) which functions as the hydrophobe in fluorosurfactants. Since June 2003, 3M has used PFBS as a replacement...
List of boiling and freezing information of solvents Partition coefficient Polarity Hydrophobe Hydrophile Lipophilic Amphiphile Lyonium ion Lyate ion...
partial pressures Hydrogen sulfide – Poisonous, corrosive and flammable gas Hydrophobe – Molecule or surface that has no attraction to water Hydrostatic pressure –...
walls of structures that benefit from low or no maintenance. Biomimetics Hydrophobe Lotus effect Non-stick surface Plant cuticle Polytetrafluoroethylene Ultrahydrophobicity...
the consensus EXLYΦQ\φ where X is any residue, Φ is any large or medium hydrophobe and φ is any small hydrophobic or polar residue. Although this sequence...
characteristics. For example, leucine and isoleucine are both aliphatic, branched hydrophobes. Similarly, aspartic acid and glutamic acid are both small, negatively...
List of boiling and freezing information of solvents Partition coefficient Polarity Hydrophobe Hydrophile Lipophilic Amphiphile Lyonium ion Lyate ion...
Correlations also exist between fouling and other morphology parameters, such as hydrophobe, showing that the more hydrophobic a membrane is, the less prone to fouling...
archéologie des matériaux exploités pour leurs propriétés adhésives et hydrophobes (Doctorat). Université Nice Sophia Antipolis. Kozowyk, P. R. B.; Soressi...
tension – Tendency of a liquid surface to shrink to reduce surface area Hydrophobe – Molecule or surface that has no attraction to water Surfactant – Substance...
cerebral brain-cell glucose dynamically in vivo. A method of ionising hydrophobe-stabilised colloid nanoparticles was described, with confirmation of their...
improved by using new lubricant-impregnated surfaces. Contact angle meter Hydrophobe Hydrophobicity scales Lotus effect Superhydrophobic coating Wang, Shutao;...
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