STABILITY BEHAVIOR OF POLYSTYRENE LATEXES COVERED WITH ZWITTERIONIC SULFOBETAINE-TYPE EMULSIFIERS

被引：22

作者：

GRAILLAT, C ^{[1
]}

DUMONT, B ^{[1
]}

DEPRAETERE, P ^{[1
]}

VINTENON, V ^{[1
]}

PICHOT, C ^{[1
]}

机构：

[1] CNRS,MAT ORGAN LAB,F-69390 LYONS,FRANCE

来源：

LANGMUIR | 1991年 / 7卷 / 05期

关键词：

D O I：

10.1021/la00053a010

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effects of pH and electrolyte concentration on the stability behavior of well-characterized polystyrene latexes, covered at saturation with two different zwitterionic sulfobetaine type emulsifiers, have been examined. The results were compared with those corresponding to sodium dodecyl sulfate (SDS) stabilized latexes. Good stability was found for the zwitterionic-stabilized latexes in the presence of a 1/1 monovalent salt (NaCl), and more particularly against a divalent salt (MgSO4), but the results are dependent upon pH and type of sulfobetaine. An additional study was performed on the electrophoretic mobility behavior of the various latexes in order to understand the stabilization mechanism confered by these surfactants. The influence of the emulsifier conformation at the water-polymer interface (mainly the orientation of the dipole), in relation with the intercharge distance, is discussed.

引用

页码：872 / 877

页数：6