Steric Repulsion The Effect of Adsorbed or Anchored Layers

It has been known for a very long time, empirically, that the addition of certain natural biopolymers such as gelatine can [Pg.45]

In recent years systematic studies using a wide variety of synthetic polymers have led to a considerable elucidation of the detailed mechanism of stabilisation of this kind, which has been given the name steric stabilisation. [Pg.46]

Adsorbed layers can affect inlcrparticlc forces in two ways. First they can influence the van der Waals attractive forces, and secondly they can give rise to a repulsion between the particles. We consider two cases. [Pg.46]

In general, the adsorption will depend on the separation of the surfaces its contribution to a will vary with H. It turns out, as will be explained in Chapter 5, that, if the adsorption increases as the surfaces come together, adsorption effects enhance the attraction, while, if r decreases as H decreases, adsorption effects oppose the attraction and may lead to an overall repulsion. [Pg.50]

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