Dipolar anions are not preferentially attracted to the oil/water interface

被引：27

作者：

Beattie, JK ^{[1
]}

Djerdjev, AM

Franks, GV

Warr, GG

机构：

[1] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[2] Univ Newcastle, Dept Chem Engn, Newcastle, NSW 2308, Australia

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 33期

关键词：

D O I：

10.1021/jp052894l

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Homogenization of hexadecane in water at pH 9 gives the same surface charge density in the presence of 0.2 mM thiocyanate or acetate anions as in the presence of chloride, indicating that these dipolar anions are not preferentially adsorbed at the oil/water interface. The decrease in the zeta potential of the emulsion droplets as the sodium salts of iodate, thiocyanate, or acetate are added from 0.1 to 10 mM is the same as that when sodium chloride is added, leading to the same conclusion. Increasing the sodium hydroxide concentration from pH 9 to 11.5 has a different effect on the zeta potential, consistent with the specific adsorption of hydroxide ion at the oil/water interface.

引用

收藏

页码：15675 / 15676

页数：2

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