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Interactions between mucin and surfactants at solid-liquid interfaces
YKI – Ytkemiska institutet.
2002 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 18, 9383-9392 p.Article in journal (Refereed)
Abstract [en]

The association between mucin and surfactants at the solid-liquid interface has been investigated employing reflectometry. The study is particularly aimed at understanding the removal of preadsorbed mucin layers by surfactant addition. To this end we investigated the effect of three different surfactants, one anionic surfactant, sodium dodecylsulfate (SDS), and two nonionic ones, penta(oxy ethylene) dodecyl ether (C12E5 ) and n-dodecylß -D-maltopyranoside (C12-mal). All three surfactants were found to be potent in removing mucin from hydrophobic surfaces. On the other hand, C12-mal was found to have a very limited effect on mucin adsorbed to hydrophilic negatively charged surfaces, whereas the mucin layer was removed by SDS and C12E5 . The association between mucin and the three different surfactants was also investigated by means of dynamic light scattering and surface tension measurements. It was concluded that SDS associates readily with mucin above a critical surfactant concentration, about 0.2 cmc, whereas the nonionic surfactants associate with mucin to a very limited degree. The results obtained with the different techniques allow us to propose that C12E5 removes mucin from silica surfaces by competitive adsorption, whereas the removal of mucin by SDS is due to formation of mucin/SDS complexes that have reduced surface affinity and increased water solubility compared to mucin alone

Place, publisher, year, edition, pages
2002. Vol. 18, 9383-9392 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27206OAI: oai:DiVA.org:ri-27206DiVA: diva2:1054210
Note
A1595Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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