caa a22 4500 463214994 CHVBK 20180405153153.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s00339-006-3844-1 doi (NATIONALLICENCE)springer-10.1007/s00339-006-3844-1 Novel wet SEM imaging of organically modified montmorillonite clay dispersions [Elektronische Daten] [J. Li, J.M. Fitz-Gerald, J.P. Oberhauser] Rheology and a novel application of wet scanning electron microscopy (WSEM) are performed on organically modified montmorillonite clay dispersions differing in free surfactant content. The dispersion without free surfactant exhibits a higher yield stress and strongly hysteretic rheology. WSEM imaging shows the influence of free surfactant on the quiescent distribution of nano- and microscale organoclay domains. Spatially resolved elemental analysis using energy dispersive X-ray spectroscopy defines regions consisting primarily of clay silicate versus those that are dominantly solvent. The contrasting images suggest that free surfactant screens attractive van der Waals forces between domains, leading to a more homogeneously distributed but structurally weaker mesoscopic network. WSEM is shown to be a valuable complementary technique in characterizing the network morphology of organoclay dispersions. More broadly, WSEM demonstrates great potential for the direct imaging of the microstructure of other classes of suspensions and particulate gels. Springer-Verlag, 2007 Li J. Department of Chemical Engineering, University of Virginia, 22904, Charlottesville, VA, USA aut Fitz-Gerald J.M. Department of Materials Science and Engineering, University of Virginia, 22904, Charlottesville, VA, USA aut Oberhauser J.P. Department of Chemical Engineering, University of Virginia, 22904, Charlottesville, VA, USA aut Applied Physics A Springer-Verlag 87/1(2007-04-01), 97-102 0947-8396 87:1<97 2007 87 339 https://doi.org/10.1007/s00339-006-3844-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-006-3844-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li J. Department of Chemical Engineering, University of Virginia, 22904, Charlottesville, VA, USA aut NATIONALLICENCE 700 1- Fitz-Gerald J.M. Department of Materials Science and Engineering, University of Virginia, 22904, Charlottesville, VA, USA aut NATIONALLICENCE 700 1- Oberhauser J.P. Department of Chemical Engineering, University of Virginia, 22904, Charlottesville, VA, USA aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 87/1(2007-04-01), 97-102 0947-8396 87:1<97 2007 87 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer