Alkyl ammonium intercalation of Mozambican bentonite

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dc.contributor.author Massinga, Pedro Horacio
dc.contributor.author Focke, Walter Wilhelm
dc.contributor.author De Vaal, Phillip L.
dc.contributor.author Atanasova, Maria T.
dc.date.accessioned 2011-01-17T08:02:40Z
dc.date.available 2011-01-17T08:02:40Z
dc.date.issued 2010-07
dc.description.abstract Organo-bentonites containing quaternary ammonium surfactants were prepared using purified bentonite from the Boane deposit in Mozambique. The intercalation was effected by intimate mixing of the surfactants into a concentrated dispersion of soda ash activated bentonite. TG indicated organic contents that exceeded CEC expectations by up to 21 mass %. XRD results were consistent with: (i) paraffin-type extended chain intercalation at tilt angles of 27° to 33°; and (ii) interdigitated monolayer intercalation of the C14 single alkyl chain surfactant and bilayer intercalation of the C16 double alkyl chains and its 1:1 mixture with the single chain surfactant. However, FTIR analysis revealed disordered alkyl chain conformations. White oil dispersions containing 10 mass % organo-bentonite (inorganic basis) featured high viscosities. They showed strong shear thinning behaviour confirming the ability of the montmorillonite particles to exfoliate. en_US
dc.description.sponsorship Financial support for this research from the Institutional Research Development Programme (IRDP) and the South Africa/Mozambique Collaboration Programme of the National Research Foundation (NRF) is gratefully acknowledged. en_US
dc.identifier.citation Massinga, PH , Focke, WW, De Vaal, PL & Atanasova, M 2010, 'Alkyl ammonium intercalation of Mozambican bentonite', Applied Clay Science, vol. 49, no. 3, pp. 142-148. [http://www.elsevier.com/locate/issn/01691317] en_US
dc.identifier.issn 0169-1317
dc.identifier.other 10.1016/j.clay.2010.04.017
dc.identifier.uri http://hdl.handle.net/2263/15736
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights Elsevier en_US
dc.subject Intercalation en_US
dc.subject Bentonite en_US
dc.subject Quaternary ammonium salt en_US
dc.subject Organo-bentonite en_US
dc.title Alkyl ammonium intercalation of Mozambican bentonite en_US
dc.type Postprint Article en_US


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