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Inclusion complexes of some non-ionic surfactants with cyclomalto-oligosaccharides

✍ Scribed by Tibor Cserháti; József Szejtli

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
580 KB
Volume
224
Category
Article
ISSN
0008-6215

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✦ Synopsis

The formation of inclusion complexes of some nonylphenyl and tributylphenyl poly(oxyethylene) surfactants [tensides, RCK(CH,CH,O),Hj with cyclomalto-hexaose, -heptaose, and -octaose (cyclodextrins, CDs), and di-and tri-O-methylcyclomaltoheptaose was studied on the basis of changes in surface tension. The relative strength of the interaction of CD and tenside was measured by reverse-phase t.1.c. The CDs increased the surface tension of the more hydrophobic tensides and decreased that of the more hydrophilic tensides. The bulk of the hydrophobic moiety of tensides, the length of the poly(oxyethylene) chain, the CD-tenside molar ratio, and the salt concentration influenced significantly the surface tension. The strengths of the inclusion complexes were influenced significantly by the concentration of the CD, the diameter of the cavity, and the length of the poly(oxyethylene) chain. The formation of inclusion complexes may influence the performance of formulations containing tensides and a CD.

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