Characterisation of montmorillonites simultaneously modified with an organic dye and an ammonium salt at different dye/salt ratios. Properties of these modified montmorillonites EVA nanocomposites

RETRACTED ARTICLE: Synthesis, characterization and assessment thermal properties of clay based nanopigments

“…The peak at 1385.62 cm -1 in BB41 spectrum can be attributed to the asymmetric CH 3 bending vibration in dimethyl groups [17]. In the IR spectrum of BB41, the bands at higher than 3100 cm -1 could be due to the presence of a water molecule [17]. These peaks and other characteristic peaks of BB41 occurred in the MMT-BB41 spectrum with slight green shift indicate the strong interaction of BB41 with silicate layers.…”

“…The bands at 2924.71 and 2865.63 cm -1 corresponded to asymmetric and symmetric vibration of C-H bonds in two CH 3 groups. The peak at 1385.62 cm -1 in BB41 spectrum can be attributed to the asymmetric CH 3 bending vibration in dimethyl groups [17]. In the IR spectrum of BB41, the bands at higher than 3100 cm -1 could be due to the presence of a water molecule [17].…”

“…These bands with some small shifts were observed in the MMT-BB41 sample at 1491.91 and 1602.42 cm -1 . Similarly, the bands at 1265 and 1160 cm -1 in BB41 spectrum which are related to -C-N stretching or aromatic ring [17] shifted to higher wave numbers (1338.60 cm -1 ) due to the interaction with silicate layers in spectrum (b). The bands at 2924.71 and 2865.63 cm -1 corresponded to asymmetric and symmetric vibration of C-H bonds in two CH 3 groups.…”

“…It seems that it was covered by BB41 in this region. The intensities of bands around 1600 and 3400 cm -1 are attributed to adsorbed water and/or hydration water, which decreased in cationic exchange process with organic molecules [16] In spectrum of BB41, the peaks at 1550 and 1479 cm -1 were attributed to the stretching vibrations of C = C and C = N of aromatic rings in the polyheterocyclic molecules [17]. These bands with some small shifts were observed in the MMT-BB41 sample at 1491.91 and 1602.42 cm -1 .…”

Filling and coloring effect of pearl shell powder and dye‐loaded pearl shell powder on polypropylene

“…Marchante et al . and Beltrán et al . synthesized NCPs through sodium montmorillonite modified with methylene blue and ammonium salts, and obtained ethylene vinyl acetate (EVA) composites with raised Young's modulus in comparison to the pure EVA.…”