Johnson Daniel J, Miles Nicholas J, Hilal Nidal
School of Chemical Environmental and Mining Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
Adv Colloid Interface Sci. 2006 Nov 30;127(2):67-81. doi: 10.1016/j.cis.2006.11.005. Epub 2006 Dec 28.
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.
颗粒在溶液中附着于气泡对多个工业过程至关重要，在泡沫浮选过程中尤为显著。在此过程中，疏水性颗粒附着于溶液中的气泡，从而使其能够作为表面泡沫被分离出来。添加化学物质有助于调节这些相互作用，以提高目标矿物的产量。在过去十年中，原子力显微镜（AFM）已被用于研究实验室中单个颗粒附着于气泡所涉及的力。这使得在不同条件下能够测量实际的DLVO（德亚金、朗道、韦弗伊和奥弗贝克）力以及粘附接触。此外，接触角可根据力与距离曲线的特征来计算。本文旨在说明如何使用胶体探针技术进行单个颗粒与气泡的相互作用，并总结描述此类实验的当前文献。
