ADSORPTION ON COLLOIDS AND FLOCCULATION - THE INFLUENCE OF SALT

被引：42

作者：

VANDUIJNEVELDT, JS ^{[1
]}

BEYSENS, D ^{[1
]}

机构：

[1] CENS,SERV PHYS SOLIDE & RESONANCE MAGNET,F-91191 GIF SUR YVETTE,FRANCE

来源：

JOURNAL OF CHEMICAL PHYSICS | 1991年 / 94卷 / 07期

关键词：

D O I：

10.1063/1.460526

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：

The stability of colloidal silica particles in a mixture of water and 2,6-lutidine is investigated in the presence of salt. Close to the demixing temperature of the solvent, a reversible flocculation occurs, coupled with lutidine adsorption on the colloid surface. Addition of Mg(NO3)2 is shown to suppress the lutidine adsorption and to reverse it into water adsorption. The flocculation disappears at the same time. This behavior is interpreted as a modification of the properties of the colloid surface by the salt and is in accord with current wetting theory.

引用

页码：5222 / 5225

页数：4

共 28 条

[1] CONTROL OF A WETTING TRANSITION BY SUBSTRATE SURFACE-CHEMISTRY - THE INTERPLAY OF LONG-RANGE AND SHORT-RANGE FORCES [J].

ABEYSURIYA, K ;

WU, XL ;

FRANCK, C .

PHYSICAL REVIEW B, 1987, 35 (13) :6771-6778

[2]

[Anonymous], 1979, CHEM SILICA

[3] THEORY OF DYNAMIC LIGHT-SCATTERING FROM POLYDISPERSE SYSTEMS [J].

ARAGON, SR ;

PECORA, R .

JOURNAL OF CHEMICAL PHYSICS, 1976, 64 (06) :2395-2404

[4] ADSORPTION PHENOMENA AT THE SURFACE OF SILICA SPHERES IN A BINARY-LIQUID MIXTURE [J].

BEYSENS, D ;

ESTEVE, D .

PHYSICAL REVIEW LETTERS, 1985, 54 (19) :2123-2126

[5]

BEYSENS D, 1989, LIQUIDS INTERFACES

[6] CRITICAL-POINT WETTING [J].

CAHN, JW .

JOURNAL OF CHEMICAL PHYSICS, 1977, 66 (08) :3667-3672

[7]

DEGENNES PG, 1981, CR ACAD SCI II, V292, P701

[8]

DEGENNES PG, 1983, CR ACAD SCI II, V297, P9

[9]

DIETRICH S, 1983, PHASE TRANSITIONS CR, V12

[10] CONTINUED EXPLORATION OF THE WETTING PHASE-DIAGRAM [J].

DURIAN, DJ ;

FRANCK, C .

PHYSICAL REVIEW B, 1987, 36 (13) :7307-7310

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