A new technique for membrane characterisation: direct measurement of the force of adhesion of a single particle using an atomic force microscope

被引:84
作者
Bowen, WR [1 ]
Hilal, N [1 ]
Lovitt, RW [1 ]
Wright, CJ [1 ]
机构
[1] Univ Wales, Dept Chem & Biol Proc Engn, Ctr Complex Fluids Proc, Biochem Engn Grp, Swansea SA2 8PP, W Glam, Wales
关键词
adhesion; atomic force microscopy; ultrafiltration;
D O I
10.1016/S0376-7388(97)00255-X
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
An Atomic Force Microscope (AFM) has been used to quantify directly the adhesive force between a colloid probe and two polymeric ultrafiltration membranes of similar MWCO (4000 Dal but different materials (ES 404 and XP 117, PCI Membrane Systems (UK)), The colloid probe was made from a polystyrene sphere (diameter 11 mu m) glued to a V shaped AFM cantilever. Measurements were made in 10(-2) M NaCl solution at pH 8. It was found that the adhesive force at the ES 404 membrane was more than five times greater than that at the XP 117 membrane, As it allows direct quantification of particle/membrane interactions, this technique should be invaluable in the development of new membrane materials and in the elucidation of process behaviour. (C) 1998 Elsevier Science B.V.
引用
收藏
页码:269 / 274
页数:6
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