Department
Departement of Chemistry
Research Interests
Specialized in Departement of Chemistry. Focused on academic and scientific development.
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Recent Publications
Maghnite grafting with (3-Mercaptopropyl) triethoxysilane and its influence on the interlamellar distance blocking value.
mixture. The intercalation phenomenon of the grafted product was investigated following a modification with
trimethyltetradecylammonium chloride at different cation exchange capacities (CEC). XRD results revealed a
fixation of the d001 value at 21.47 Å after the grafting reaction, caused by the condensation of silane molecules
with the two adjacent clay layers. This effect was not observed during the modification of non-grafted montmorillonite with the same surfactant, as the d001 value increased with higher concentrations of trimethyltetradecylammonium chloride. TGA analysis revealed the hydrophobic nature of the modified material, initially
hydrophilic, with a reduction in the loss of physisorbed and chemisorbed water from 11.36 % to 6.73 %, thus
limiting the swelling phenomenon. The absorption bands at 2954.4 cm⁻¹, 2854.4 cm⁻¹, and 2569 cm⁻¹, assigned
to -CH₂ (symmetric), -CH₂ (asymmetric), and SH groups, respectively, confirm the successful grafting and
intercalation. Controlling the fixation of the interlayer spacing of a clay grafted with an alkoxysilane can lead to
the development of an organophilic material with immobilized reactive organic groups and controlled swelling
Citation
M. MELOUKI Azzedine, (2025-02-11), "Maghnite grafting with (3-Mercaptopropyl) triethoxysilane and its influence on the interlamellar distance blocking value.", [national] Results in Engineering , Elsevier
STUDY OF THE MECHANICAL BEHAVIOR OF A COMPOSITE MATERIAL REINFORCED WITH STIPA TENACISSIMA FIBERS
polymer matrices and plant fiber reinforcements, specifically Alfa fibers (Stipa
tenacissima), using a 2 wt % NaOH solution for varying durations (1, 3, 5, and 24 h).
Theoretical Framework: Plant fiber-reinforced composites are increasingly favored
for their eco-friendliness, low density, cost-effectiveness, and promising mechanical
properties. However, challenges persist due to inadequate adhesion between the
polymer matrix and plant fibers, which can compromise composite performance.
Method: Alfa fibers were chemically treated with a 2 wt % NaOH solution for
different durations. A comprehensive suite of tests, including FTIR, DRX, GTA,
SEM, and tensile tests, were conducted to evaluate the effects of the treatment.
Results and Discussion: XRD analyses revealed a significant increase (36.26%) in
the crystallinity index of Alfa fibers treated with a 2 wt % NaOH solution for 5 hours
compared to untreated fibers. Moreover, mechanical testing demonstrated that
composites reinforced with treated fibers exhibited superior mechanical properties
compared to those reinforced with untreated fibers.
Research Implications: These findings highlight the potential for enhancing the
performance of plant fiber-reinforced composites through chemical treatments,
thereby enabling them to compete effectively with composites utilizing synthetic
fibers.
Originality/Value: This study contributes to advancing high-performance composite
materials by addressing the critical issue of interfacial adhesion between polymer
matrices and plant fibers, thus expanding the application potential of eco-friendly
composite in various industries.
Citation
M. MELOUKI Azzedine, (2025-01-17), "STUDY OF THE MECHANICAL BEHAVIOR OF A COMPOSITE MATERIAL REINFORCED WITH STIPA TENACISSIMA FIBERS", [national] International Journal of professional Business , JPB REVIEW
Genomic analysis of SARS-COV2 using Biopython and Simplot comparison.
analysis is SARS-COV2 Omicron in Algerian compared to the neighbor countries using Global and local
alignment algorithms, and the second compared coronaviruses from animal sources like Pangolin, Bat, Civet,
and Camal, to predict its origin. Of course, with real applications and samples from GISAID, NCBI, and
GenBank, and deal with them using the Biopython command line in the Colab platform. The presented work
confirms that the local alignment algorithm for the spike region provides better family classification and
grouping by matching score sorting. The identity percentage of SARS-COV-2 compared to animal
coronaviruses published previously using Simplot software from other authors have wrong values and
reviewed in the presented work with the right values using the Biopython library. A high matching score found
in bats and pangolins confirms that the origin of SARS-COV-2 is from animal wildlife.
Citation
M. MELOUKI Azzedine, (2024-12-15), "Genomic analysis of SARS-COV2 using Biopython and Simplot comparison.", [national] Journal of Bioscience and Applied Research , DOI:10.21608/jbaar.2024.332656.1098