ANSTO Publications Online >
Journal Publications >
Journal Articles >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/5707

Title: Organization of mixed dimethyldioctadecylammonium and choline modifiers on the surface of synthetic hectorite
Authors: Andriani, Y
Jack, K S
Gilbert, E P
Edwards, G A
Schiller, T L
Strounina, E
Osman, A F
Martin, D J
Keywords: SPIN
CLAYS
MONTMORILLONITE
POLYURETHANES
NEUTRONS
SCATTERING
Issue Date: 1-Nov-2013
Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation: Andriani, 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.
Abstract: Understanding 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.
URI: http://dx.doi.org/10.1016/j.jcis.2013.07.055
http://apo.ansto.gov.au/dspace/handle/10238/5707
ISSN: 0021-9797
Appears in Collections:Journal Articles

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback