AZZEDINE Melouki

GHACHA IKRAM

Elaboration et caractérisation d'un matériau hybride innovant montmorillonite/PS. Application à l'hydrophobie et à la stabilité thermique

MOKHTARI Cheyma

Étude et caractérisation des déchets plastiques issus de la transformation des polymères: valorisation par le développement de bioplastiques à base de substances naturelles comme alternative durable

Development of polymer/clay hybrid biomaterials for tissue ingineering

Citation

AZZEDINE Melouki , ,(2026-01-18), Development of polymer/clay hybrid biomaterials for tissue ingineering,4th International Conference on Pioneer and Innovative Studies 'ICPIS),Konya /TURKEY

Controlled intercalation and functionnalization of Algerian montmorillonite by silane grafting and surfactant modification

Citation

AZZEDINE Melouki , ,(2025-11-19), Controlled intercalation and functionnalization of Algerian montmorillonite by silane grafting and surfactant modification,1st International Congress in Innovations in Chemistry and Technology ICICT,Farhat Abbas University Setif ALGERIA

Hybrid clay/polymer materials, hydrophobicity and thermal stability

Citation

AZZEDINE Melouki , ,(2025-11-18), Hybrid clay/polymer materials, hydrophobicity and thermal stability,1st International Congress in Innovations in Chemistry and Technology ICICT,Farhat Abbas University Setif ALGERIA

Treatment of wastewater from the city of M'sila

Citation

AZZEDINE Melouki , ,(2025-10-29), Treatment of wastewater from the city of M'sila,1st National Seminar on Structural Mechanics and Materials SNMSM,Mecanical Engineering department , University of M'sila

The influence of gene flow on the genetic diversity of SARS-CoV-2 and its variants (British, South African, and Brazilian)

Citation

AZZEDINE Melouki , , (2025-09-25), The influence of gene flow on the genetic diversity of SARS-CoV-2 and its variants (British, South African, and Brazilian), Journal of Umm Al-Qura University for Applied Sciences, Vol:10, Issue:1007, pages:1-7, Springer

Water soaking was used to recover fibers from the Djelfa region in southern Algeria, which were then modified with sodium hydroxide at various concentrations (3%, 6%, and 9%) for 5 h at 40◦C. Manual stacking and compression molding procedures were used to create composite samples containing 10 vol % treated and untreated esparto fibers in a polyester matrix. The samples were analyzed using FTIR, XRD, TGA, SEM, and three-point flexural testing. Esparto fibers treated with 9% NaOH demonstrated a 60.39% higher crystallinity index versus raw fibers. Flexural characteristics analysis revealed that composites reinforced with esparto fibers modified with 9% NaOH exhibited superior mechanical performance relative to those containing untreated fibers, with improvements of 47.90% in flexural strength and 48.46% in flexural modulus, respectively. These findings indicate that when chemically treated, Stipa tenacissima fibers hold strong potential as a sustainable alternative to synthetic fibers for reinforcing polymer composites in structural applications.

Citation

AZZEDINE Melouki , , (2025-07-15), Optimization of Alkali Treatment for Stipa tenacissima Fibers in Polyester-Based Composites, Science and Technology Indonesia, Vol:10, Issue:3, pages:780-787, Magister Program of Material Sciences, Graduate School of Sriwijaya University.

EFFECT OF CHEMICAL TREATMENT ON THE PROPERTIES OF CYNODON DACTYLON ROOT FIBER

Citation

AZZEDINE Melouki , , (2025-05-30), EFFECT OF CHEMICAL TREATMENT ON THE PROPERTIES OF CYNODON DACTYLON ROOT FIBER, CELLULOSE CHEMISTRY AND TECHNOLOGY, Vol:59, Issue:3, pages:283-290, Editura Academiei Române

Morphological and Chemical Modifications of Cynodon dactylon Roots via Alkali Treatment for Improved Composite Performance

Citation

AZZEDINE Melouki , ,(2025-03-04), Morphological and Chemical Modifications of Cynodon dactylon Roots via Alkali Treatment for Improved Composite Performance,4th International Conference on Recent Academic Study ICRAS,Konya / TURKEY

tudy of the antibacterial and a and antioxidant activity of the “Punica granatum” plant from the M’sila region

Citation

AZZEDINE Melouki , ,(2025-02-22), Study of the antibacterial and a and antioxidant activity of the “Punica granatum” plant from the M’sila region,4th International Conference on Contemporary Academic Research ICCAR,Konya /TURKEY

Maghnite (Algerian Montmorillonite) was grafted with (3-Mercaptopropyl)triethoxysilane in a water/ethanol 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

AZZEDINE Melouki , , (2025-02-11), Maghnite grafting with (3-Mercaptopropyl) triethoxysilane and its influence on the interlamellar distance blocking value., Results in Engineering, Vol:25, Issue:104, pages:1-15, Elsevier

Objectives: This research investigates methods to enhance the adhesion between 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

AZZEDINE Melouki , , (2025-01-17), STUDY OF THE MECHANICAL BEHAVIOR OF A COMPOSITE MATERIAL REINFORCED WITH STIPA TENACISSIMA FIBERS, International Journal of professional Business, Vol:10, Issue:2, pages:1-20, JPB REVIEW