protective colloid


Also found in: Medical.

protective colloid

[prə¦tek·tiv ′kä‚lȯid]
(physical chemistry)
A colloidal substance that protects other colloids from the coagulative effect of electrolytes and other agents.
References in periodicals archive ?
PVA acts as protective colloid, stabilizing the double emulsion droplets by adsorbing onto their surface [1], It is understandable that its concentration has a major influence on the fraction of smaller particles, since small droplets can only survive up to the final curing process if steric stabilization is effective.
Another valuable application for Nichigo G-Polymer is its use as a functional polymer protective colloid agent in emulsion polymerization of various acrylic emulsions." www.soarus.com; www.g-polymer.com.
Wet end starch also works as a protective colloid for reactive sizes in alkaline papermaking.
The copolymer is prepared by emulsion polymerization and occurs in the presence of a nonionic protective colloid. The copolymer has a particle size of less than one micron.
The yielded droplets were stabilized against coalescence in the presence of a granulating agent or protective colloid. The degree of protection depends on the type and concentration of the protective colloid used [17].
This is found in the well-known fact that the vertical transport of soil particles insoluble in water is made possible by hydrophilic substances (so-called "protective colloids").
The emulsifying action of substances of high molecular weight, such as gelatin, casein, polymethacrylic acid, methylcellulose and polyvinyl alcohol, and their action as protective colloids, can be best explained by the colloid dispersion.