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emulsion
emulsiona fine dispersion of one liquid or pureed food substance into or onto anothere·mul·sion E0120600 (ĭ-mŭl′shən)n.1. A suspension of small globules of one liquid in a second liquid with which the first will not mix: an emulsion of oil in vinegar.2. A photosensitive coating, usually of silver halide grains in a thin gelatin layer, on photographic film, paper, or glass.
[New Latin ēmulsiō, ēmulsiōn-, from Latin ēmulsus, past participle of ēmulgēre, to milk out : ē-, ex-, ex- + mulgēre, to milk; see melg- in Indo-European roots.]
e·mul′sive adj.emulsion (ɪˈmʌlʃən) n1. (Photography) photog a light-sensitive coating on a base, such as paper or film, consisting of fine grains of silver bromide suspended in gelatine2. (Chemistry) chem a colloid in which both phases are liquids: an oil-in-water emulsion. 3. (Chemistry) Also called: emulsion paint a type of paint in which the pigment is suspended in a vehicle, usually a synthetic resin, that is dispersed in water as an emulsion. It usually gives a mat finish4. (Pharmacology) pharmacol a mixture in which an oily medicine is dispersed in another liquid5. any liquid resembling milk[C17: from New Latin ēmulsiō, from Latin ēmulsus milked out, from ēmulgēre to milk out, drain out, from mulgēre to milk] eˈmulsive adje•mul•sion (ɪˈmʌl ʃən)
n. 1. any colloidal suspension of a liquid in another liquid. 2. any liquid mixture containing medicine suspended in minute globules. 3. a photosensitive layer of silver halide suspended in gelatin, thinly applied to one surface of a photographic film. [1605–15; < Latin ēmuls(us), past participle of ēmulgēre to draw off (milk) (ē- e- + mulgēre to milk) + -ion] e•mul′sive, adj. e·mul·sion (ĭ-mŭl′shən) A suspension of tiny droplets of one liquid in a second liquid. By making an emulsion, one can mix two liquids that ordinarily do not mix well, such as oil and water. Compare aerosol, foam.
emulsify verbemulsionA colloidal dispersion in which small droplets of one liquid are dispersed within another, such as oil in water or water in oil.Thesaurus| Noun | 1. | emulsion - (chemistry) a colloid in which both phases are liquids; "an oil-in-water emulsion"chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactionscolloid - a mixture with properties between those of a solution and fine suspension | | 2. | emulsion - a light-sensitive coating on paper or film; consists of fine grains of silver bromide suspended in a gelatinphotographic emulsioncoating, coat - a thin layer covering something; "a second coat of paint"silver nitrate - a nitrate used in making photographic emulsions; also used in medicine as a cautery and as a topical antibacterial agentsilver bromide - a bromide that darkens when exposed to light; used in making photographic emulsions |
Translationsemulsion (iˈmalʃən) noun a milky liquid prepared by mixing eg oil and water. 乳液 乳状液emulsion paint a paint mixed with water rather than oil. 乳膠漆 乳化漆emulsion
emulsion: see colloidcolloid
[Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also called a colloidal system, colloidal solution, or colloidal dispersion.
..... Click the link for more information. .Emulsion a disperse system consisting of droplets of a liquid (the dispersed phase) distributed evenly throughout another liquid (the dispersion medium). A distinction is made between emulsions of the oil-in-water type (with droplets of a nonpolar liquid, such as a mineral oil, dispersed in a polar medium, usually water) and reverse emulsions of the water-in-oil type (with droplets of a polar liquid in a non-polar medium). Multiple emulsions are also encountered, in which the droplets of the dispersed phase serve as the dispersion medium for even finer droplets of another dispersed phase. Emulsions are also divided into lyophilic and lyophobic types (seeLYOPHILIC AND LYOPHOBIC COLLOIDS). Lyophilic emulsions are thermodynamically stable, reversible systems that are formed spontaneously at temperatures close to the critical displacement temperature for two interacting liquids. Lyophobic emulsions are thermodynamically unstable systems formed by the mechanical, acoustic, or electrical dispersion of one liquid in another or by the separation of droplets from a supersaturated solution or melt; such emulsions may exist for prolonged periods only if mixed with an emulsifier. Lyophilic emulsions are highly dispersed (colloidal) systems, the droplets of which measure no more than 10–5 cm. Lyophobic emulsions are coarsely (poorly) dispersed systems with droplet size usually ranging from 10–5 to 10–2 cm. If the dispersed phase and dispersion medium differ greatly in density, the emulsion will be kinetically unstable—that is, the particles of the dispersed phase will tend either to sink to the bottom or rise to the top. The sedimentation of emulsion droplets that are well protected against coalescence may lead to the concentration of the droplets and the formation of creams or sediments of continuous two-liquid phases not separated into discrete layers. The type and properties of an emulsion depend on such factors as its composition, the relative proportions of the liquid phases, the quantity and chemical nature of the emulsifier, the method of emulsification, and the temperature at which the emulsification is carried out. A change in the composition of an emulsion or in the action of the emulsifier may produce a phase inversion, in which an oil-in-water emulsion becomes a water-in-oil emulsion or vice versa. Dilute emulsions are typical liquids, with droplets that move freely and independently of one another in a highly mobile medium. In emulsions with droplets of uniform size, as the concentration of the dispersed phase exceeds 74 percent by volume, the viscosity of the system increases abruptly, and the emulsion becomes a gel. In the process, droplets that initially had a spherical shape are highly deformed in such a way that they come to resemble polyhedrons. The content of the dispersed phase in highly concentrated emulsions may be as high as 99 percent by volume; in such cases, the dispersion medium is retained between the droplets in the form of fine layers that resemble the liquid films between bubbles in foams. Emulsions with various compositions and properties are commonly used in industry, agriculture, and medicine; they also have household uses. Many foods, such as milk and egg yolks, are multicomponent emulsions, as are unrefined petroleum and the milky juices of plants. Among the products that take the form of emulsions are cooling lubricants and various pesticides, cosmetics, drugs, and binders for latex paints. Asphalt emulsions are used in construction. REFERENCESVoiutskii, S. S. Kurs kolloidnoi khimii, 2nd ed. Moscow, 1975. Pages 367–81.
Emul’sii. Leningrad, 1972. (Translated from English.)
Becher, P. Emulsions: Theory and Practice, 2nd ed. New York, 1965.
Emulsions and Emulsion Technology, parts 1–2. Edited by K. J. Lissant. New York, 1974.L. A. SHITS emulsion[ə′məl·shən] (chemistry) A stable dispersion of one liquid in a second immiscible liquid, such as milk (oil dispersed in water). (graphic arts) In photography, the photosensitized material on film, plates, and various photographic papers. emulsion1. A mixture of liquids insoluble in one another, in which one is suspended in the other in the form of minute globules. 2. A mixture in which solid particles are suspended in a liquid in which they are insoluble, as a mixture of bitumen and water, with uniform dispersion of the bitumen globules. The cementing action needed in roofing and waterproofing takes place as the water evaporates.emulsion A suspension of a light-sensitive silver salt, especially silver chloride or silver bromide in a colloidal medium—usually gelatin—which is used for coating photographic films, plates, and paper.emulsion1. Photog a light-sensitive coating on a base, such as paper or film, consisting of fine grains of silver bromide suspended in gelatine 2. Chem a colloid in which both phases are liquids 3. a type of paint in which the pigment is suspended in a vehicle, usually a synthetic resin, that is dispersed in water as an emulsion. It usually gives a mat finish 4. Pharmacol a mixture in which an oily medicine is dispersed in another liquid emulsion
emulsion [e-mul´shun] a mixture of two immiscible liquids, one being dispersed throughout the other in small droplets; a colloid system in which both the dispersed phase and the dispersion medium are liquids. Margarine, cold cream, and various medicated ointments are emulsions. In some emulsions the suspended particles tend to join together and settle out; hence the container must be shaken each time the emulsion is used.film emulsion a dehydrated gel emulsion of light- or radiation-sensitive silver halide that is applied to a suitable base.e·mul·sion (ē-mŭl'shŭn), A system containing two immiscible liquids in which one is dispersed, in the form of small globules (internal phase), throughout the other (external phase) (for example, oil in water [milk] or water in oil [mayonnaise]). [Mod. L. fr. e-mulgeo, pp. -mulsus, to milk or drain out] emulsion Pharmacology A suspension of droplets of one liquid in another–eg, oil, water. See Emulsifier. e·mul·sion (ē-mŭl'shŭn) A system containing two immiscible liquids in which one is dispersed, in the form of very small globules (internal phase), throughout the other (external phase). [Mod. L. fr. e-mulgeo, pp. -mulsus, to milk or drain out]e·mul·sion (ē-mŭl'shŭn) A system containing two immiscible liquids in which one is dispersed, in the form of small globules, throughout the other. [Mod. L. fr. e-mulgeo, pp. -mulsus, to milk or drain out]AcronymsSeeEMULemulsion
Related to emulsion: emulsifier, Emulsifying agentSynonyms for emulsionnoun (chemistry) a colloid in which both phases are liquidsRelated Words- chemical science
- chemistry
- colloid
noun a light-sensitive coating on paper or filmSynonymsRelated Words- coating
- coat
- silver nitrate
- silver bromide
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