Salt effects on lignosulfonate and Kraft lignin stabilized O/W-emulsions studied by means of electrical conductivity and video-enhanced microscopy

被引：47

作者：

Gundersen, SA

Sæther, O

Sjöblom, J ^{[1
]}

机构：

[1] Statoil AS, R&D Ctr, N-7005 Trondheim, Norway

[2] Univ Bergen, Dept Chem, N-5007 Bergen, Norway

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2001年 / 186卷 / 03期

关键词：

lignosulfonates; kraft lignins; oil/water emulsions; conductivity measurements; creaming rates; emulsion stability; video-enhanced microscopy; droplet size distributions; rheology; electrolyte effects;

D O I：

10.1016/S0927-7757(00)00541-0

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 emulsifying properties of two lignosulfonate (LS) fractions and one Kraft lignin fraction were studied under different experimental conditions. A method utilizing the conductivity of aqueous dispersions and the volume fraction dispersed phase was used to study the creaming rates of the emulsions. The electrical conductivities were measured in the upper and the lower part of the emulsions, respectively, in order to determine creaming rates. Video-enhanced microscopy (VEM) pictures were used to characterize the droplets, and droplet size distributions (DSD). The stability against creaming, coalescence and flocculation was studied and it was found that the properties of the interfacial films containing LS were strongly affected by trivalent aluminum, ferric and chromium ions. The bulk viscosities of the emulsions were determined for emulsions with different stabilities. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：141 / 153

页数：13

共 64 条

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