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Preparation and Morphological Study of Epoxy/Silane Modified Nanoclay Nanocomposites
Asian Journal of Chemistry,
Vol. 22 No. 1 (2010): Vol 22 Issue 1, 2010
Abstract
Epoxy-clay nanocomposites were prepared using silane modified
montmorillonite. The clay was first purified using a 1-inch hydrocyclon
apparatus. The purified clay was modified with various amounts of (γ)-
3-aminopropyltrimethoxysilane as a modifier. The synthesized
organoclay was mixed and swollen by a mixture of epoxy resin and
stoichiometric amount of curing agent at different temperature, mixing
time and agitation. Finally, the compounds were cured in an oven at 90 ºC
for 2 h. The nanostructure materials were characterized using X-ray
diffraction and transmission electron microscopy. The X-ray diffraction
patterns showed that the impurities and large particles (greater than
5 microns) are removed from the samples. The results showed that
interlayer spacing was increased with increasing the amount of modifier
and the basal distance in the organoclay was more than 2.1 nm which
was larger than that of the original clay (1.24 nm). The X-ray diffraction
patterns showed that the interlayer spacing of clay in the nanocomposite
was increased and the 001 peak of the Montmorillonite was shifted to
smaller 2 theta and in many cases disappeared. The X-ray diffraction
and transmission electron microscopy results demonstrated that the layers
of clay in the nanocomposite samples were fully exfoliated.
montmorillonite. The clay was first purified using a 1-inch hydrocyclon
apparatus. The purified clay was modified with various amounts of (γ)-
3-aminopropyltrimethoxysilane as a modifier. The synthesized
organoclay was mixed and swollen by a mixture of epoxy resin and
stoichiometric amount of curing agent at different temperature, mixing
time and agitation. Finally, the compounds were cured in an oven at 90 ºC
for 2 h. The nanostructure materials were characterized using X-ray
diffraction and transmission electron microscopy. The X-ray diffraction
patterns showed that the impurities and large particles (greater than
5 microns) are removed from the samples. The results showed that
interlayer spacing was increased with increasing the amount of modifier
and the basal distance in the organoclay was more than 2.1 nm which
was larger than that of the original clay (1.24 nm). The X-ray diffraction
patterns showed that the interlayer spacing of clay in the nanocomposite
was increased and the 001 peak of the Montmorillonite was shifted to
smaller 2 theta and in many cases disappeared. The X-ray diffraction
and transmission electron microscopy results demonstrated that the layers
of clay in the nanocomposite samples were fully exfoliated.
Keywords
a Organoclay
Nanocomposite
Modification
Morphology
Exfoliation.
KHOEINI*, M., BAZGIR†, S., TAMIZIFAR‡, M., NEMATI§, A., & ARZANI¶, K. (2009). Preparation and Morphological Study of Epoxy/Silane Modified Nanoclay Nanocomposites. Asian Journal of Chemistry, 22(1), 797–807. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/16711
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