Hexadecylamine hydrochloride

The presence of adsorbed Langmuir monolayers may induce very high changes in the surface potential of water. For example, A% shifts attaining ca. -0.9 (hexadecylamine hydrochloride) and ca. + 1.0 V (per-fluorodecanoic acid) have been observed. " ... 

The physical meaning of the g" (ion) potential depends on the accepted model of ionic double layer. The proposed models correspond to the Gouy Chapman diffuse layer, with or without allowance for the Stern modification and/or the penetration of small counterions above the plane of the ionic heads of the adsorbed large ions [17,18]. The presence of adsorbed Langmuir monolayers may induce very high changes of the surface potential of water. For example. A/" shifts attaining ca. —0.9 (hexadecylamine hydrochloride), and ca. -bl.OV (perfluorodecanoic acid) have been observed [68]. 

Frictional behavior during the course of a traverse over a condensed monolayer of n-hexadecylamine hydrochloride was similar to that for the quaternary ammonium bromide except, as expected from Fig. 10-9, the film of primary amine hydrochloride was more durable. 

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