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Effect of cotton substrate characteristics upon surfactant adsorption
Author(s) -
Ginn M. E.,
Kinney F. B.,
Harris J. C.
Publication year - 1961
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02641235
Subject(s) - pulmonary surfactant , adsorption , wax , cationic polymerization , chemistry , critical micelle concentration , substrate (aquarium) , nonionic surfactant , sodium , chemical engineering , chromatography , micelle , polymer chemistry , organic chemistry , aqueous solution , biochemistry , oceanography , engineering , geology
It is shown that the reported differences in anionic surfactant adsorption on cotton can be largely attributed to the presence of variable amounts of natural wax on the fiber surface. High adsorption values with peaks near critical micelle concentration (cmc) result from surfactant adsorption on the wax surface. Wax‐free surfaces fail either to show the same high maxima or the same relative magnitude of adsorption. At surfactant cmc the adsorption relationship for waxy cotton (millimoles/g. of cotton) cationic: nonionic: anionic was roughly 66 to 17 to 74. For dewaxed cotton, this became 40 to 10 to nil. Confirming the findings of others, no adsorption by cotton of sodium tripolyphosphate occurs either with waxy or wax‐free cotton. Also addition of tripolyphosphate decreased the adsorption of several anionic surfactants. At concentrations greater than cmc and at sufficiently‐high solution temperature, anionic surfactants can solubilize cotton wax, leaving a less waxy substrate upon which adsorption is then reduced.