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The cross sectional headgroup area of nonionic surfactants; The influence of polydispersity
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
2001 (Engelska)Ingår i: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 180, s. 187-191Artikel i tidskrift (Refereegranskat)
Abstract [en]

In this work we have measured surface tension as a function of concentration of pure and technical nonionic ethoxylated surfactants. CMC values, surface tension at the CMC and the cross sectional headgroup areas are compared. It is shown that the CMC does not depend significantly on the polydispersity of the polyoxyethylene chain. However, the surfactant headgroup area, as determined from the surface tension plots, are much smaller for polydisperse surfactants than for homologue pure surfactants. This is due to the selective adsorption of the shorter polyoxyethylene species at the surface. For the same reason the surface tension at the CMC is lower for technical surfactants than for homologue pure species.

Ort, förlag, år, upplaga, sidor
2001. Vol. 180, s. 187-191
Nyckelord [en]
Nonionic surfactant, polyoxyethylene, polydispersity, surface tension, CMC, headgroup area
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-26436OAI: oai:DiVA.org:ri-26436DiVA, id: diva2:1053438
Anmärkning
A1353Tillgänglig från: 2016-12-08 Skapad: 2016-12-08 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

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