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Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties
Author(s) -
Geist Matthias F.,
Peyratout Claire S.,
Kurth Dirk G.
Publication year - 2015
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201500065
Subject(s) - intercalation (chemistry) , montmorillonite , polyelectrolyte , nanocomposite , nickel , materials science , inorganic chemistry , chemical engineering , aqueous solution , fourier transform infrared spectroscopy , chemistry , polymer , organic chemistry , nanotechnology , metallurgy , engineering
Abstract Nanocomposites obtained from the montmorillonite clay (Na 0.36 (Al 1.64 Mg 0.36 )Si 4 O 10 (OH) 2 ⋅ n H 2 O) and metallosupramolecular polyelectrolytes (MEPE) with iron(II) and nickel(II) are prepared by an aqueous intercalation reaction. Intercalation of MEPE in the interlayer structure of montmorillonite (MMT) is confirmed by different analytical techniques including powder X‐ray diffraction, FTIR spectroscopy, and thermal analysis. We note a difference in the intercalation behavior between Ni II and Fe II . The intercalation of Fe‐MEPE is hindered by traces of Fe 2 O 3 in MMT. Removal of the impurities with sodium dithionite and citrate buffer makes Fe‐MEPE‐MMT available. Electrorheological measurements reveal for both nanocomposites a distinctive ER effect. The effect depends on the intercalated coordination polymer. Dielectric spectroscopy shows a different polarization for Fe‐MEPE‐MMT and Ni‐MEPE‐MMT.