Surfactant-free dimer fatty acid polyamide/montmorillonite bio-nanocomposites

Show simple item record Macheca, Afonso Gnanasekaran, Dhorali Focke, Walter Wilhelm 2014-05-22T13:33:58Z 2014-05-22T13:33:58Z 2014-03
dc.description.abstract Polyamide bio-nanocomposites were successfully prepared using a surfactant-free approach. The clay morphology was fixed by dispersing the ammonium ion-exchanged clay in acetic acid. This was mixed with an acetic acid solution of the polyamide and the composite was recovered by precipitation with water. The composites featured a mixed morphology containing some exfoliated clay sheets together with nano-sized clay tactoids. Bio-nanocomposites containing as much as 27.5 wt.% clay were obtained. At this filler level, and depending on the temperature, the modulus was up to nine times higher than that of the parent polymer. Addition of clay also increased the glass transition temperature by as much as 5 °C. This indicates that the high interfacial surface area, presented by the clay platelets dispersed in the matrix, significantly impaired the polymer chain mobility. en_US
dc.description.librarian hb2014 en_US
dc.description.sponsorship Institutional Research Development Programme (IRDP) and the South Africa/Mozambique Collaboration Programme of the National Research Foundation (NRF) en_US
dc.description.uri en_US
dc.identifier.citation Macheca, A, Gnanasekaran, D & Focke, WW 2014, 'Surfactant-free dimer fatty acid polyamide/montmorillonite bio-nanocomposites', Colloid and Polymer Science, vol. 292, no. 3, pp. 669-676. en_US
dc.identifier.issn 0303-402X (print)
dc.identifier.issn 1435-1536 (online)
dc.identifier.other 10.1007/s00396-013-3122-7
dc.language.iso en en_US
dc.publisher Springer en_US
dc.rights © Springer-Verlag Berlin Heidelberg 2013. The original publication is available at : en_US
dc.subject Nanocomposites en_US
dc.subject Solution intercalation en_US
dc.subject Thermomechanical properties en_US
dc.title Surfactant-free dimer fatty acid polyamide/montmorillonite bio-nanocomposites en_US
dc.type Postprint Article en_US

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