Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/4523
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dc.contributor.authorPolat, Hürriyet-
dc.contributor.authorChander, Subhash-
dc.date.accessioned2016-04-20T07:49:20Z
dc.date.available2016-04-20T07:49:20Z
dc.date.issued1999-01
dc.identifier.citationPolat, H. and Chander, S. (1999). Adsorption of PEO/PPO triblock co-polymers and wetting of coal. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 146(1-3), 199-212. doi:10.1016/S0927-7757(98)00794-8en_US
dc.identifier.issn0927-7757
dc.identifier.issn0927-7757-
dc.identifier.urihttp://doi.org/10.1016/S0927-7757(98)00794-8
dc.identifier.urihttp://hdl.handle.net/11147/4523
dc.description.abstractThe adsorption characteristics of PEO/PPO/PEO triblock co-polymers on coal were investigated using surface tension and contact angle measurements. Although these surfactants have been widely used as wetting agents, it was observed that they increased the hydrophobicity of coal at concentrations below about 10-6 M. Surface tension studies were carried out to explain the reasons for this behavior. The surface tension versus concentration profiles displayed three distinct regions. In region I, surface tension decreased linearly and monomers were proposed to be the dominant species. This region extended to a surfactant concentration of about 10-6 M. In region II, a transition region between regions I and III, dimers, trimers, etc., were considered to form. In region III, micelles formed and surface tension was independent of concentration. The concentration at which monomers associate to form dimers, etc., is referred to as the critical association concentration (cac). The contact angle of coal increased when concentration was raised from low values to the cac. It decreased when the reagent concentration was above the cac. Finally, at concentrations above the cmc, the wetting of coal was complete and contact angle was zero.en_US
dc.language.isoenen_US
dc.publisherElsevier Ltd.en_US
dc.relation.ispartofColloids and Surfaces A: Physicochemical and Engineering Aspectsen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectCoalen_US
dc.subjectPEOen_US
dc.subjectPPOen_US
dc.subjectPolymeren_US
dc.titleAdsorption of PEO/PPO triblock co-polymers and wetting of coalen_US
dc.typeArticleen_US
dc.authoridTR6387en_US
dc.institutionauthorPolat, Hürriyet-
dc.departmentİzmir Institute of Technology. Chemistryen_US
dc.identifier.volume146en_US
dc.identifier.issue1-3en_US
dc.identifier.startpage199en_US
dc.identifier.endpage212en_US
dc.identifier.wosWOS:000078717400018en_US
dc.identifier.scopus2-s2.0-0032912425en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1016/S0927-7757(98)00794-8-
dc.relation.doi10.1016/S0927-7757(98)00794-8en_US
dc.coverage.doi10.1016/S0927-7757(98)00794-8en_US
dc.identifier.wosqualityQ3-
dc.identifier.scopusqualityQ2-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.openairetypeArticle-
item.languageiso639-1en-
item.fulltextWith Fulltext-
crisitem.author.dept04.01. Department of Chemistry-
Appears in Collections:Chemistry / Kimya
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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