Quantification of particle-bubble interactions using atomic force microscopy: A review

被引:67
|
作者
Johnson, Daniel J. [1 ]
Miles, Nicholas J. [1 ]
Hilal, Nidal [1 ]
机构
[1] Univ Nottingham, Sch Chem Environm & Min Engn, Nottingham NG7 2RD, England
基金
英国工程与自然科学研究理事会;
关键词
atomic force microscopy; AFM; particle-bubble interactions; colloid probe; force measurement;
D O I
10.1016/j.cis.2006.11.005
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 attachment of particles to bubbles in solution is of fundamental importance to several industrial processes, most notably in the process of froth flotation. During this process hydrophobic particles attach to air bubbles in solution, which allows them to be separated as froth at the surface. The addition of chemicals can help to modulate these interactions to increase the yield of the minerals of interest. Over the past decade the atomic force microscope (AFM) has been adapted for use in studying the forces involved in the attachment of single particles to bubbles in the laboratory. This allows the measurement of actual DLVO (Derjaguin, Landau, Vervey and Overbeek) forces and adhesive contacts to be measured under different conditions. In addition contact angles may be calculated from features of force versus distance curves. It is the purpose of this article to illustrate how the colloid probe technique can be used to make single particle-bubble interactions and to summarise the current literature describing such experiments. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:67 / 81
页数:15
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