In Situ Polymerization of Polyaniline in Silane Modified Calcium Based Layered Double Hydroxide Intercalated Tartrate

In the present study, the goal was the synthesis, characterization, surface morphology and thermal ‎properties of organic-inorganic hybrid material of polyaniline/Ca-Fe layered double hydroxide ‎nanocomposites (Ca/Fe-LDH /PANI NCs). At first, Ca/Fe-LDH with intercalate bio-safe tartrate ‎anion (TA-Ca/Fe-LDH) was prepared via the co-precipitation and hydrothermal method. The ‎surface of as-synthesized TA-Ca/Fe/LDH was successfully modified by 3-‎aminopropyltriethoxysilane coupling agents. Then, polymer matrix nanocomposites (PMNCs) were ‎fabricated by in situ polymerization of aniline in the presence of different amounts of modified LDH. ‎The as-prepared PMNCs were characterized by X-ray diffraction, Fourier transform infrared, ‎transmission electron microscopy, field emission scanning electron microscopy, and ‎thermogravimetric analysis (TGA) techniques. The results of morphological studies showed the ‎morphological structure similar to the lamellar ‎structure and plate-like shape particles. According to ‎the TEM results, the sizes of the particle were reduced less than 33 nm. According to TGA results, ‎the thermal stability of polyaninline wad improved by adding modified LDH‎. ‎Also by increasing ‎silane modified LDH contents in the final NCs, the char yields at 700 °C were ‎improved.‎

کلیدواژه ها:

Calcium based layered double hydroxide ، ‎ Anionic clays ، Polyaniline ، Nanocomposites