surface-active agent


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surface-active agent

[′sər·fəs ¦ak·tiv ′ā·jənt]
(materials)
A soluble compound that reduces the surface tension of liquids, or reduces interfacial tension between two liquids or a liquid and a solid. Also known as surfactant.

surface-active agent

1. In unhardened mixtures of concrete, an additive which has the ability to modify the surface tension of the mixing water, thereby facilitating the wetting and penetrating action of the water, and/or assisting the emulsifying, dispersing, solubilizing, foaming, or frothing of other additives.
2. Same as surfactant.
References in periodicals archive ?
For the more surface-active agents, large deviations between the surface tension-bubble life time isotherms are observed, which is an indicator that the frothing agents accumulated in the foam.
Generally, these are water-soluble surface-active agents comprised of a hydrophobic portion, usually a long alkyl chain, attached to hydrophilic or water solubility enhancing functional groups.
He covers the chemistry of textile materials, including various fibers' structure and properties, water requirements and treatments, with emphasis on environmentally sound practice, surface-active agents, cleaning and whitening as preparatory processes, dyes and dyeing, including theories of dyeing, dyeing machines, and dyeing of cellulose fibers, animal fibers and synthetic fibers.
The role of surface-active agents, solvents, and resin chemistry on the adhesion/cohesion will be illustrated.
Heavily ground-in dirt is dissolved and emulsified by surface-active agents.

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