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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1021/la103278v
|2 doi
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|a pubmed24n0675.xml
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|a eng
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|a Cui, Yannan
|e verfasserin
|4 aut
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|a Adsorption of polyetheramines on montmorillonite at high pH
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a Date Completed 04.03.2011
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|a Date Revised 10.11.2010
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Adsorption of a series of polyetheramines on montmorillonite in aqueous suspension was investigated by a range of methods: elemental analysis, atomic absorption spectroscopy, measurement of pH, conductivity and electrophoretic mobility, and small-angle X-ray scattering. Adsorption proceeds through an ion exchange mechanism. The maximum surface coverage attained is equivalent to about 40% of the cationic exchange capacity of the clay. Adsorption of the poly(oxypropylene) block adjacent to the amine group onto the clay surface may contribute to this. Surprisingly the adsorption takes place at pH conditions well above the pK(a) of the amine surfactants, where they are not protonated in the bulk solution. The surface coverage as a function of molar mass broadly agrees with predictions assuming adsorbed polymers adopt a densely packed mushroom configuration at the clay surface
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Amines
|2 NLM
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|a Polymers
|2 NLM
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|a Surface-Active Agents
|2 NLM
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|a Bentonite
|2 NLM
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|a 1302-78-9
|2 NLM
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|a van Duijneveldt, Jeroen S
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 26(2010), 22 vom: 16. Nov., Seite 17210-7
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|x 1520-5827
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|g volume:26
|g year:2010
|g number:22
|g day:16
|g month:11
|g pages:17210-7
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|u http://dx.doi.org/10.1021/la103278v
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