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Your search keyword '"Mahmoudian, Shaya"' showing total 3 results
Start Over Author "Mahmoudian, Shaya" Topic cellulose
3 results on '"Mahmoudian, Shaya"'

1. A facile approach to prepare regenerated cellulose/graphene nanoplatelets nanocomposite using room-temperature ionic liquid.

Author

Mahmoudian S, Wahit MU, Imran M, Ismail AF, and Balakrishnan H

Subjects
Macromolecular Substances chemistry, Materials Testing, Molecular Conformation, Particle Size, Surface Properties, Cellulose chemistry, Crystallization methods, Graphite chemistry, Ionic Liquids chemistry, Nanostructures chemistry, Nanostructures ultrastructure
Abstract

This study presents the preparation of regenerated cellulose (RC)/graphene nanoplatelets (GNPs) nanocomposites via room temperature ionic liquid, 1-ethyl-3-methylimidazolium acetate (EMIMAc) using solution casting method. The thermal stability, gas permeability, water absorption and mechanical properties of the films were studied. The synthesized nanocomposite films were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The T20 decomposition temperature of regenerated cellulose improved with the addition of graphene nanoplatelets up to 5 wt%. The tensile strength and Young's modulus of RC films improved by 34 and 56%, respectively with the addition of 3 wt% GNPs. The nanocomposite films exhibited improved oxygen and carbon dioxide gas barrier properties and water absorption resistance compared to RC. XRD and SEM results showed good interaction between RC and GNPs and well dispersion of graphene nanoplatelets in regenerated cellulose. The FTIR spectra showed that the addition of GNPs in RC did not result in any noticeable change in its chemical structure.

Published
2012
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2. Preparation and Thermal Properties of Cellulose/Layered Silicate Montmorillonite Nanocomposites Prepared via Ionic Liquids

Author

Uzir Wahit Mat, A.A. Yussuf, Mahmoudian Shaya, and Nematzadeh Navid

Subjects
Thermogravimetric analysis, Materials science, Nanocomposite, Mechanical Engineering, Intercalation (chemistry), Regenerated cellulose, chemistry.chemical_compound, Montmorillonite, chemistry, Chemical engineering, Mechanics of Materials, mental disorders, Ionic liquid, Ultimate tensile strength, General Materials Science, Cellulose, Composite material
Abstract

Environmentally friendly nanocomposites comprising of cellulose and montmorillonite (MMT) were prepared via a green solvent, ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl) using solution casting method. The cellulose concentration and MMT content were varied according to predetermine formulation. The regenerated cellulose nanocomposites were characterized using X-ray diffraction (XRD). The thermal and thermal oxidative properties of regenerated cellulose nanocomposites were studied by thermogravimetric analysis (TGA). Mechanical properties of the nanocomposites films were investigated by tensile strength measurements. The intercalation and exfoliation of MMT in the cellulose matrix were confirmed by XRD results. TGA results showed an increment in degradation temperature and char yield for the nanocomposites. Multistep TGA graph was observed for degradation under air. The results indicated that the addition of MMT up to 6 wt% in regenerated cellulose matrix improved the tensile properties.

Published
2011

3. Preparation of regenerated cellulose/montmorillonite nanocomposite films via ionic liquids

Author

Mahmoudian, Shaya, Wahit, Mat Uzir, Ismail, A.F., and Yussuf, A.A.

Subjects
*NANOCOMPOSITE materials, *CELLULOSE, *MONTMORILLONITE, *IONIC liquids, *IMIDAZOLES, *MECHANICAL properties of thin films, *THERMOPHYSICAL properties, *SOLUTION (Chemistry)
Abstract

Abstract: Regenerated cellulose/montmorillonite (RC/MMT) nanocomposite films were successfully prepared in ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl) using solution casting method. The effect of MMT loading on the thermal, mechanical, gas permeability and water absorption properties of the nanocomposite films was investigated. X-ray diffraction analysis revealed a cellulose II crystalline structure and well dispersed MMT in RC/MMT nanocomposite films. Presence of MMT enhanced the thermal and thermal-oxidative stability and char yield of RC. The tensile strength and Young''s modulus of RC films improved by 12% and 40%, respectively with the addition of 6wt.% MMT. RC/MMT nanocomposite films exhibited improved gas barrier properties and water absorption resistance compared to RC. The results demonstrated that there is a possible interface interaction between cellulose and MMT which yielded better thermal and mechanical properties of the nanocomposite films as compared to pure cellulose. [Copyright &y& Elsevier]

Published
2012
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