Inter-particle forces arising from adsorbed bolaform surfactants in colloidal suspensions
Abstract
The effects of adsorbed bolaform surfactants,
[HOOC(CH
2
)
n
COOH], on the yield
stress–pH behaviour of concentrated aqueous ZrO
2
suspensions are reported. Both the bolaform concentration and its
chain length, n, increase the yield stress. A ten-fold
increase in the maximum yield stress, τ
ymax
,
is recorded for n![[gt-or-equal]](https://www.rsc.org/images/entities/char_2a7e.gif)
10. The results are explained in terms
of a particle bridging model. The increase in
τ
ymax
reaches a limit at the critical dimer
concentration.
10. The results are explained in terms
of a particle bridging model. The increase in
τ
ymax
reaches a limit at the critical dimer
concentration.
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