Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties

Abstract

Nanocomposites obtained from the montmorillonite clay (Na0.36(Al1.64Mg0.36)Si4O10(OH)2⋅n H2O) 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 NiII and FeII. The intercalation of Fe‐MEPE is hindered by traces of Fe2O3 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.

Addition of Multi‐walled Carbon Nanotubes to Fe‐ and Ru‐Metallopolymer Electrodes Enhances Response Time and Cycling Stability in Electrochromic Cells

“…To further investigate the structural differences after the addition of the MWCNTs, X‐ray diffraction (XRD) measurements were carried out. As shown in Figure S1, the XRD spectra of Fe‐ and Ru‐MEPE are similar between a diffraction angle 2Θ of 25° and 80°, which clearly indicates that these peaks refer to the linear polymer in accordance with the literature [48] . Therefore, any structural changes induced by the addition of the MWCNTs can be observed at a lower 2Θ values.…”

“…As shown in Figure S1, the XRD spectra of Feand Ru-MEPE are similar between a diffraction angle 2Θ of 25°a nd 80°, which clearly indicates that these peaks refer to the linear polymer in accordance with the literature. [48] Therefore, any structural changes induced by the addition of the MWCNTs can be observed at a lower 2Θ values. In both cases, the intensity of the peaks at approx.…”

Nanocomposites of Fe(II)-Based Metallo-Supramolecular Polymer and a Layered Inorganic–Organic Hybrid for Improved Electrochromic Materials

“…Electrochromic (EC) materials have received considerable attention as an important material used in electrochemical glass tinting, i.e., smart windows and antiglare rearview mirrors in cars [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. Many types of EC materials have been reported and are often categorized as follows.…”

“…The formation of composites with inorganic materials is often applied to enhance the physical properties of organic polymer materials [ 1 , 21 , 22 , 23 , 24 ]; however, this method has rarely been utilized for MSPs [ 25 , 26 , 27 , 28 , 29 ]. Previously, we reported a hybrid where an Fe-based metallo-supramolecular polymer (polyFe, Scheme 1 ) intercalated in the interlayer space of saponite [ 27 , 28 ], a phyllosilicate mineral.…”

Preparation of Cellulose/Laponite Composite Particles and Their Enhanced Electrorheological Responses

“…In a previous study, Laponite as well as many other kinds of clays were used as ER materials separately or blended with polymers [ 31 , 32 , 33 ]. The special layered structures of clays played significant roles in preparing composite particles with intercalated, exfoliated, and even core–shell structures [ 34 , 35 , 36 ]. Herein, because of the existence of Laponite nanosheets, the arrangement of cellulose polymer chains in regeneration process is hindered, which resulted in different crystal structures in the composite.…”