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Nano- and Microtechnology from A - Z: From Nanosystems to Colloids and Interfaces by Laurier L. Schramm

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S

SAD

See Surfactant Affinity Difference.

SAE Viscosity

A Society of Automotive Engineers (SAE) motor oil viscosity classification. SAE summer grades are defined by viscosity ranges. For example, SAE 30 oil will have a minimum low-shear rate, kinematic viscosity of 9.3 cSt (at 100 °C), and a maximum of less than 12.5 cSt (at 100 °C), and also will have a minimum high-shear rate absolute viscosity of 2.9 cP (at 150 °C). SAE winter grades are defined by, in addition, maximum viscosities at specified low temperatures, and carry a W suffix. Multigrade oils meet combined winter and summer specifications and have combined designations such as SAE 10W-30.

Salinity Requirement

See Optimum Salinity.

Salt Air

See Salt Foam.

Salt Curve

A graphical representation of the viscosity of a system versus salt concentration. This curve can be an important characteristic of formulated systems in which viscosity control is necessary, such as in shampoo formulas.

Salt Foam

A foam made from a surfactant solution having a high salt content. Some versions of salt foam are made to be placed on top of drinks intended for human consumption such as margaritas. Also termed salt air.

Salting In

Solutions: When the addition of electrolyte to a solution causes an increase in the solubility of a solute. See also Salting Out.

Surfactants: When the addition of electrolyte to a solution of nonionic surfactant causes the critical micelle concentration to increase. Also, addition of electrolyte to an ...

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