Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.colsurfa.2009.06.020
DC FieldValue
dc.titleEffects of additives on the cloud points of selected nonionic linear ethoxylated alcohol surfactants
dc.contributor.authorLi, J.-L.
dc.contributor.authorBai, D.-S.
dc.contributor.authorChen, B.-H.
dc.date.accessioned2014-06-17T08:31:48Z
dc.date.available2014-06-17T08:31:48Z
dc.date.issued2009-08-20
dc.identifier.citationLi, J.-L.,Bai, D.-S.,Chen, B.-H. (2009-08-20). Effects of additives on the cloud points of selected nonionic linear ethoxylated alcohol surfactants. Colloids and Surfaces A: Physicochemical and Engineering Aspects 346 (1-3) : 237-243. ScholarBank@NUS Repository. <a href="https://doi.org/10.1016/j.colsurfa.2009.06.020" target="_blank">https://doi.org/10.1016/j.colsurfa.2009.06.020</a>
dc.identifier.issn09277757
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/66561
dc.description.abstractEffects of various additives including inorganic salts, nonionic and ionic surfactants, water-soluble polymers and alcohols on the cloud points of three linear nonionic surfactants, Tergitol 15-S-7, Tergitol 15-S-9 and Neodol 25-7, were investigated. These surfactants are readily biodegradable and either linear primary or secondary ethoxylated alcohols. Cloud points of these surfactants were functions of their concentrations and concentrations of additives. The cloud points of nonionic surfactant mixtures lay in between the cloud points of individual component surfactants. Presence of two ionic surfactants, sodium dodecyl sulfate (SDS) and cetyl trimethyl ammonium bromide (CTAB), increased the cloud point of 1 wt% Tergitol 15-S-7 micellar solution dramatically when concentrations of ionic surfactants approaching their critical micelle concentration. Addition of water-soluble polymers decreased the cloud point, while addition of inorganic salts can either increase or decrease the cloud points. However, the effect of an alcohol additive on cloud point was dependent on its chain length or its water solubility. Interestingly, synergistic effects between sulfate or phosphate and pentanol on depression of cloud points of Tergitol 15-S-9 were discovered. A linear model predicting cloud points of Tergitol 15-S-X (X = 7, 9 and 12) surfactants and Neodol 25-X (X = 7, 9 and 12) surfactants were proposed with a correlation to logarithm of their ethylene oxide numbers. © 2009 Elsevier B.V. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.colsurfa.2009.06.020
dc.sourceScopus
dc.subjectAdditive
dc.subjectCloud point
dc.subjectIonic surfactant
dc.subjectNonionic surfactant
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.contributor.departmentCHEMICAL & ENVIRONMENTAL ENGINEERING
dc.description.doi10.1016/j.colsurfa.2009.06.020
dc.description.sourcetitleColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.description.volume346
dc.description.issue1-3
dc.description.page237-243
dc.description.codenCPEAE
dc.identifier.isiut000268923200036
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