AZZEDINE Melouki

BENDJEDOU Halima Saadia , SALMI Khaoula

Synthèse et caractérisation d’un nouveau matériau nanocomposite à base de Maghnite et de polystyrène

LOGRAB Fatima Zohra , SAIB Dounia

Etude comparative du greffage d’une montmorillonite purifiée et sodique par deux differents silanes

SEGHIRI Barkahoum , REFICE Oumbarka

Etude du greffage du triethoxysilylpropanethiol sur une montmorillonite organophile

HACHROUF Fatima Zohra , BRAHIMI Ayat Allah

Etude de la polymérisation in-situ du styrène sur une montmorillonite ponté par un macrocation Al13

ZEROUGA Mourad , AOUINA Hocine, CHENOUFI Aymen

Greffage du TESPSH sur une argile échangée par le sodium

BELOUARDI Sarra , BARKAT Mohyeddine, BENSAOUCHA Kheireddine

Etude du greffage du TMSPM sur une bentonite échangée par le sodium

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

Citation

AZZEDINE Melouki , ,(2023-11-04), Study of the antibacterial and antioxidant activity of the “Punica granatum” plant from the M’sila region,2nd International Conference on Contemporary Academic Research (ICCAR 2023),Konya (Turkey)

Valorisation and treatment of vegetable fibers to prepare composite materials

Citation

AZZEDINE Melouki , ,(2023-09-26), Valorisation and treatment of vegetable fibers to prepare composite materials,3rd International Conference on Innovative Academic Studies (ICIAS),Konya (Turkey)

Etude et caractérisation d’un matériau composite à base des fibres végétales

Citation

AZZEDINE Melouki , ,(2023-09-25), Etude et caractérisation d’un matériau composite à base des fibres végétales,Journée mondiale des pharmaciens et la deuxième journée nationale de pharmacie (Ain-Temouchent),Ain-Temouchent

Study of the antibaantioxydant activity of the « Punica Granatum » Plant from the ctrerial M’sila region

Citation

AZZEDINE Melouki , ,(2023-09-25), Study of the antibaantioxydant activity of the « Punica Granatum » Plant from the ctrerial M’sila region,Journée mondiale des pharmaciens et la deuxième journée nationale de pharmacie (Ain-Temouchent),Ain-Temouchent

Valorisation et traitement des fibres végetales pour préparer des matériaux composites

Citation

AZZEDINE Melouki , ,(2023-05-30), Valorisation et traitement des fibres végetales pour préparer des matériaux composites,Journée mondiale de la Sclérose en plaque (Ain-Témouchent),Ain-Témouchent

Researchers are showing increasing interest in plant fiber reinforced composites due to their eco-friendliness, low density, low cost and amazing mechanical properties. However, some challenges remain for researchers in this field, most notably poor adhesion between the polymer matrix and the plant fibers, which reduces the mechanical properties of composites reinforced with these fibers. This study aims to improve the adhesion between the matrix and the reinforcement by chemically treating Alfa fibers (Stipa tenacissima) with a 3 wt% NaOH solution at different times (1, 3, 5 and 24 h). FTIR, DRX, GTA and tensile tests were conducted. XRD tests showed that the crystallinity index of 3% alkali treated Alfa fibers for 5 h increased by 36.26%, compared to that of untreated fibers. The results also revealed that the mechanical properties of composites reinforced with treated fibers outperformed those reinforced with untreated fibers. These findings can contribute to the development of high mechanical performance composites, which can be competitive with those prepared with synthetic fibers. Keywords: composite, Stipa tenacissima, adhesion, tensile strength, alkaline treatment

Citation

AZZEDINE Melouki , Azzedine BENYAHIA , Chouki FARSI , Nadir DEGHFEL , Nouri LAIB , Mahmoud Lebid , , (2023), EFFECT OF ALKALINE TREATMENT ON MECHANICAL PROPERTIES OF ALFA FIBER/UNSATURATED POLYESTER COMPOSITE, Cellulose Chemistry and Technology, Vol:57, Issue:5, pages:607-615, Cellulose Chemistry and Technology

Elaboration of a material based on a thermosetting matrix reinforced by waste

Citation

AZZEDINE Melouki , ,(2022-12-13), Elaboration of a material based on a thermosetting matrix reinforced by waste,1st International Conference on innovative materials for sustainable development held at,Annaba (Algeria)

Synthèse biogénique des nanoparticules d’Ag (AgNPs) à partir d’un extrait aqueux de l’espèce Salvia Verbenaca, évaluation de leur activité antibactérienne

Citation

AZZEDINE Melouki , ,(2022-12-13), Synthèse biogénique des nanoparticules d’Ag (AgNPs) à partir d’un extrait aqueux de l’espèce Salvia Verbenaca, évaluation de leur activité antibactérienne,1ier Seminaire National sur les Substances Bioactives Substance naturelle aujourd’hui, médicament prometteur demain. (M’sila),M’sila

Graffting of Algerian montmorillonite with (3-Mercaptopropyl Triethoxysilane

Citation

AZZEDINE Melouki , ,(2022-12-10), Graffting of Algerian montmorillonite with (3-Mercaptopropyl Triethoxysilane,1st International Conference on Science and Academic Reseach (ICSAR),Konya – Turkey

Study of the mechanical properties of composite with thermosetting matrix reinforced with vegetable fibers

Citation

AZZEDINE Melouki , ,(2022-12-10), Study of the mechanical properties of composite with thermosetting matrix reinforced with vegetable fibers,1st International Conference on Science and Academic Reseach (ICSAR),Konya (Turkey)

1st International Conference on Scientific and Academic Research

Citation

AZZEDINEMelouki , ,(2022-12-10); 1st International Conference on Scientific and Academic Research,,Asst. Prof. Dr. Umut ÖZKAYA

Modification of a Maghnite by an alkylammonium with differents cations exchanges capacities

Citation

AZZEDINE Melouki , ,(2022-11-23), Modification of a Maghnite by an alkylammonium with differents cations exchanges capacities,5th International Eurasian Conference on Biological and Chemical Sciences,Ankara (Turkey)

Valorisation de la coquille d’amande au contact de l’acide fulvique issu de la rivière Suwannee (SRFA)

Citation

AZZEDINE Melouki , ,(2022-11-14), Valorisation de la coquille d’amande au contact de l’acide fulvique issu de la rivière Suwannee (SRFA),1ier Seminaire National sur la Gestion durable des ressources en eau et valorisation des sous produits (Alger),Alger

Polystyrene/organo-Algerian montmorillonite hybrid material was prepared by radical copolymerization of styrene monomer in the presence of the double organic modified clay. Before copolymerization process, the local (Algerian) montmorillonite was sodified, fractionated (< 2 µm), intercaled with dodecylamine (DDA) salts and grafted by trimethoxysilylpropylmethacrylate (TMSPM). The copolymerization has occurred onto methacrylate ported by grafted silane. X-ray fluorescence results showed a successful homoionization and insersion of DDA salts onto montmorillonite. CHN microanalysis revealed the evolution of the carbon ratio during modification of MMT by DDA, grafting and copolymerization reactions. The characterization (XRD) revealed that DDA salts were intercaled onto montmorillonite galleries and part of the copolymerization was occurred in interlayer spaces of clay (intercalated structure) by increasing d001 from 12.69 Å for homoionisated clay to 15.33 Å for intercalated clay and to 23.08 Å for hybrid material. Fourier transform infrared (FTIR) spectra mainly confirmed the presence of DDA salts, the grafting of TMSPM and polystyrene polymer and increasing of hydrophobicity of clay during modifications process (intercalation, grafting and copolymerization). Thermogravimetic analysis (TGA) showed that the grafted clay sample have higher thermal stability than intercalated sodic montmorillonite. TGA revealed also that the thermal stability of prepared hybrid organoclay is greatly higher than pur polystyrene polymer (45 °C higher) and that hydrophobicityhybrid organoclay > hydrophobicitygrafted clay > hydrophobicity intercalated clay > hydrophobicityfractinated sodic clay. The copolymer was recovered by hydrofluoric acid attack, analyzed by FTIR and compared to hybrid organoclay FTIR spectra

Citation

Smail TERCHI , AZZEDINE Melouki , Dehimi Ouali, Abdelhakim Bounab, , (2022), Preparation of new copolymer (polystyrene/TMSPM grafted on DDA‑fractionated algerian montmorillonite) hybrid organoclay by radical copolymerization: structural study, thermal stability and hydrophobicity area, Journal of Thermal Analysis and Calorimetry, Vol:147, Issue:10, pages:5637–5648, SPRINGER

Selectivité d’adsorption des reactions de SRFA par les bentonites. (Adsorption selectivity of SRFA fractions by bentonites)

Citation

AZZEDINE Melouki , , (2021-11-12), Selectivité d’adsorption des reactions de SRFA par les bentonites. (Adsorption selectivity of SRFA fractions by bentonites), Sientific Study & Research-Chemistry & Chemical Engineering, Biotechnology, Food Industry, Vol:22, Issue:4, pages:463-478, ALMA MATER Publishing House, “VASILE ALECSANDRI” University of Bacău. All rights reserved

High grafting efficiency (98%) of 3-mercaptopropyl triethoxysilane (MPTES) onto Algerian montmorillonite was achieved. Before grafting process, the Algerian montmorillonite was sodified, fractionated (<2µm) and intercaled with dodecylamine (DDA) salts. The obtained grafted clay was used to prepare polystyrene/organoclay hybrid material by radical polymerization of styrene monomer. X-ray Fluorescence (XRF) results showed a successful homoionisation of clay and insersion of DDA salts onto montmorillonite. CHN micro-analysis was revealed evolution of the carbon ratio during modification of clay by DDA, grafting and polymerization reactions. Fourier transform infrared (FTIR) spectrums were mainly confirmed the presence of DDA salts, the grafting of MPTES and polystyrene polymer and increasing of hydrophobicity of clay during modifications process (intercalation, grafting and polymerization). The characterization (XRD) was revealed that DDA salts, 3-mercaptopropyl triethoxysilane molecules and polystyrene polymer were respectively intercaled, grafted and polymerized onto montmorillonite galleries by increasing of d001 from 12.69 Å for homoionisated clay to 15.33 Å for intercaled clay and to 21.47 Å for grafted clay and to 25.08 Å for polystyrene/organoclay hybrid material. Thermogravimetic analysis (TGA) showed High grafting efficiency (98%) of MPTES. It showed also that the grafted clay sample have higher thermal stability than intercaled sample and that the thermal stability of prepared organoclay hybrid material is greatly higher than pur polystyrene polymer and that hydrophobicity hybrid organoclay≈ hydrophobicity grafted clay ˃hydrophobicity intercaled clay˃ hydrophobicity fractinated sodic clay. The polymer was recovered by hydrofluoric acid attack, analyzed by FTIR and compared to hybrid organoclay FTIR spectra

Citation

Smail TERCHI , AZZEDINE Melouki , dehimi ouali, Dehimi Ouali, , (2021), Grafting of 3 mercaptopropyl triethoxysilane onto dodecylamuonium intercaled Algerian montmorillonite; characterizations and application for synthesis of polystyrene/organoclay hybrid material by radical polymerization, Journal of New Technology and Materials, Vol:11, Issue:1, pages:10-18, OEB Univ. Publish. Co.