Removal of a solid organic soil from a hard surface by glucose-derived surfactants: effect of surfactant chain length, headgroup polymerisation and anomeric configuration
A. Weerawardena et al., Removal of a solid organic soil from a hard surface by glucose-derived surfactants: effect of surfactant chain length, headgroup polymerisation and anomeric configuration, COLL SURF A, 169(1-3), 2000, pp. 317-328
Citations number
30
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
The ability of sugar-derived surfactants to remove a solid organic soil fro
m a hard surface has been investigated using a quartz crystal microbalance
(QCM) technique. A matrix of anomerically pure alkyl glucosides and alkyl m
altosides, as well as two polydisperse commercial alkylpolyglucoside (APG)
surfactant mixtures, were investigated to study the way in which surfactant
structure influences hard soil detergency behaviour. As expected, the remo
val of the hard soil, tristearin, from the gold surface was poor at surfact
ant concentrations below the critical micelle concentration (CMC) but rose
dramatically at higher concentrations. At high concentrations above the CMC
, the amount of hard soil ultimately removed was not dependent on the surfa
ctant structure. In contrast, the kinetics of soil removal was dependent on
the headgroup degree of polymerisation (DP), alkyl chain length, and anome
ric configuration for the matrix of surfactants studied. Alkyl maltoside su
rfactants removed the hard soil faster than the corresponding alkyl glucosi
de; an alkyl chain length of ten carbon atoms provided faster soil removal
than the octyl or dodecyl counterpart; and at short chain lengths, the alph
a-anomers remove tristearin faster than the corresponding beta-anomer. (C)
2000 Elsevier Science B.V. All rights reserved.