Synthesis and structural characterizations of [chromophore]⁺‐saponite/polyurethane nanocomposites

Abstract

In this study, three chromophores-p-nitroaniline, 4-(4-nitrophenylazo)aniline, and 4-[(E)-2-{4-[(E)-2-(4-nitrophenyl)-1-diazenyl]phenyl}-1-diazenyl]anilinewere intercalated into layered aluminosilicate saponite and then dispersed into the polyurethanes matrix. The intercalated chromophore/saponite complexes were examined by inductively coupled plasma emission and element analysis technologies. The molecular orbital package computation simulation and X-ray diffraction (XRD) analysis showed that possible configurations of chromophore ions on the gallery surfaces of saponite suggest that the chromophore molecules lie parallel to the basal planes of silicate as an inclined paraffin structure or as pseudo-multilayers. The XRD and transmission electron microscopy analysis indicated that the delamination of organoclay in the polyurethanes matrix exhibited nanolayers, exfoliated structure, or both. In particular, even at high doping levels up to 15 wt % of organoclay, the [chromophore] ϩsaponite/polyurethanes film did not display a macroscopic aggregation of layered silicates and showed high transparency. The thermal stability of chromophore was significantly enhanced as intercalated into the layered aluminosilicate saponite, and the glass-transition temperature of [chromophore] ϩ -saponite/polyurethanes nanocomposites proportionally increased with increased clay content.

Organic inorganic dye filler for polymer: Blue-coloured layered double hydroxides into polystyrene

“…In such approach polymer nanocomposites are of great interest [2], and some interesting multifunctionalities are reported such optical sensors using colour sensitive gelatine pH indicator [3], or non-linear optical polymer using a saponite chromophore hybrid material into polyurethane [4]. We surmise that hybrid inorganic organic I/O assembly constitutes a suitable approach for obtaining multifunctional materials which can be subsequently used as filler for polymers [5], and more specifically, we focus here on the dual mechanical and optical properties supplied by a filler into a polymer.…”

Synthesis of poly(ferrocenylsilanes) with different molecular weight and their electrochemical behavior

“…[1][2][3][4][5] Ring-opening polymerization of silicon-bridged ferrocenophanes provided access to the first examples of high molecular weight poly(ferrocenylsilanes) (PFS), which are useful materials for modification of electrodes as electrochemical sensors and as nonlinear optical materials. 6 -9 Wang et al 3 and Nguyen et al 10 have reported the detailed electrochemical studies for films of PFS.…”

New Millable Polyurethane/Organoclay Nanocomposite: Preparation, Characterization and Properties

“…Plenty of studies have already been conducted regarding polyurethane nanocomposites based on cast and thermoplastic elastomers [8][9][10][11][12][13][14] but there is no paper available to date concerning millable polyurethane-based nanocomposites. This paper highlights the preparation and the properties of the millable polyurethane/organoclay nanocomposite.…”