Organization of mixed dimethyldioctadecylammonium and choline modifiers on the surface of synthetic hectorite

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dc.contributor.authorAndriani, Yen_AU
dc.contributor.authorJack, KSen_AU
dc.contributor.authorGilbert, EPen_AU
dc.contributor.authorEdwards, GAen_AU
dc.contributor.authorSchiller, TLen_AU
dc.contributor.authorStrounina, Een_AU
dc.contributor.authorOsman, AFen_AU
dc.contributor.authorMartin, DJen_AU
dc.date.accessioned2014-06-23T04:03:26Zen_AU
dc.date.available2014-06-23T04:03:26Zen_AU
dc.date.issued2013-11-01en_AU
dc.date.statistics2014-06-23en_AU
dc.description.abstractUnderstanding the nature of mixed surfactant self-assembly on the surface of organoclays is an important step toward optimizing their performance in polymer nanocomposites and for other potential applications, where selective surface interactions are crucial. In segmented thermoplastic polyurethane nanocomposite systems, dual-modified organoclays have shown significantly better performance compared to their single-modified counterparts. Until now, we had not fully characterized the physical chemistry of these dual-modified layered silicates, but had hypothesized that the enhanced composite performance arises due to some degree of nanoscale phase separation on the nanofiller surface, which enables enhanced compatibilization and more specific and inclusive interactions with the nanoscale hard and soft domains in these thermoplastic elastomers. This work examines the organization of quaternary alkyl ammonium compounds on the surface of Lucentite SWN using X-ray diffraction (XRD), thermogravimetric analysis (TGA), attenuated total reflectance Fourier-transfer infrared (ATR FT-IR), C-13 cross-polarization (CP)/magic angle spinning (MAS) nuclear magnetic resonance (NMR), and small-angle neutron scattering (SANS). When used in combination with choline, dimethyldioctadecylammonium (DMDO) was observed to self-assemble into discontinuous hydrophobic domains. The inner part of these hydrophobic domains was essentially unaffected by the choline (CC); however, surfactant intermixing was observed either at the periphery or throughout the choline-rich phase surrounding those domains. © 2013, Elsevier Ltd.en_AU
dc.identifier.citationAndriani, Y., Jack, K. S., Gilbert, E. P., Edwards, G. A., Schiller, T. L., Strounina, E., Osman, A. F., & Martin, D. J. (2013). Organization of mixed dimethyldioctadecylammonium and choline modifiers on the surface of synthetic hectorite. Journal of Colloid and Interface Science, 409, 72-79. doi:10.1016/j.jcis.2013.07.055en_AU
dc.identifier.govdoc5431en_AU
dc.identifier.issn0021-9797en_AU
dc.identifier.journaltitleJournal of Colloid and Interface Scienceen_AU
dc.identifier.pagination72-79en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jcis.2013.07.055en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5707en_AU
dc.identifier.volume409en_AU
dc.language.isoenen_AU
dc.publisherAcademic Press Inc Elsevier Scienceen_AU
dc.subjectSpinen_AU
dc.subjectClaysen_AU
dc.subjectMontmorilloniteen_AU
dc.subjectPolyurethanesen_AU
dc.subjectNeutronsen_AU
dc.subjectScatteringen_AU
dc.titleOrganization of mixed dimethyldioctadecylammonium and choline modifiers on the surface of synthetic hectoriteen_AU
dc.typeJournal Articleen_AU
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