Journal of Materials, Processes and Environment


The JMPE evaluated by its peers through two reading and writing committees composed of specialists in materials science and engineering, it disseminates in-depth studies reflecting the latest scientific and technical advances in the field. The subjects proposed, deal with materials for civil engineering, transport, renewable energies and technical ceramics. Sustainable development at the service of technological innovation and the environmental context at the heart of many scientific and industrial applications in various fields such as: corrosion and durability of materials. Scientific and technological issues associated with the wide variety of processes involved in the implementation and properties of materials fall within a broad multidisciplinary field including process engineering, materials science, mechanics, physics and physicochemistry materials.


Ouverture de Soumission

Nous avons le plaisir d’informer la communauté universitaire, de la reprise imminente de la parution du journal « Journal of Materials, Processes and Environment » de l’Unité de Recherche Matériaux, Procédés et Environnement (UR-MPE).

Pour ce, nous invitons l’ensemble des chercheurs et des doctorants de soumissionner leurs travaux dans ce journal dont le prochain numéro paraitra en juillet 2022.

Le dernier délai d’envoi des articles est fixé au 31 mai 2022.










Ab-initio calculation of structural electronic and thermodynamic properties of zinc-blende structure: ZnTe, MgTe and their Zn1-x MgxTe ternary alloys

Tairi Latifa, 

Résumé: The First-principles calculations are performed to study the structural, electronic and thermodynamic properties of Zn1-xMgxTe ternary alloys using the full potential-linearized augmented plane wave method (FP-LAPW) within the density functional theory (DFT). In this approach generalized gradient approximation (PBE-GGA) was used for the exchange-correlation potential. The dependence of the lattice constant bulk modulus and band gap on the composition x was analyzed. The lattice constant for Zn1-xMgxTe alloys exhibits a small deviation from the Vegard’s law. A marginal deviation of the bulk modulus from linear concentration dependence LCD was observed for these alloys. The bowing of the fundamental gap versus composition predicted by our calculations is in good agreement with available theoretical data. The microscopic origins of the gap bowing were explained by using the approach of Zunger and co-workers. To achieve the energy eigen values convergence, the plane wave expansion with RMT Kmax equal to 8.0 was used where RMT is the smallest radii of the muffin-tin spheres and Kmax lmax the cut-off for the wave function basis. The RMT values muffin-tin radii were taken to be 2.25, 2.40 and 2.50 a.u for the B.N and as atoms, respectively. The maximum value for the angular momentum quantum, lmax =10 is utilised for the valence wave function expansion inside the atomic spheres, while the charge density was Fourier expanded up to Gmax =12 (Ryd)1/2. A mesh of 72 and 36 special K-points for the binary compounds and the ternary alloys respectively, were taken in the irreducible wedge of the Brillouin zone for the total energy calculation. Other macroscopic properties such as the function of pressure and temperature are presented in this paper and derived using the standard thermodynamic relations. The thermodynamic stability of this alloy was investigated by calculating the excess enthalpy of mixing, Hm as well as the phase diagram by calculating the critical temperatures, heat capacity and the entropy.

Mots clés: Copper halides, FP-LAPW, First principles calculations, Alloys, Thermodynamic stability.


Kerkar Fouad, 

Résumé: The multi-crystalline silicon (mc-Si) produced with directional solidification is still dominating the photovoltaic industry. It is the best way to get high solar cell efficiencies with low production cost. The quality of wafers produced affects directly the conversion efficiency of obtained solar cell. The multi-crystalline silicon ingot is grown by extract Heat from the bottom of the crucible by opening the insulation and move down the heat exchanger block from the heat zone (HEM). Therefore, the solid-liquid interface moves upwards from the bottom to top of the crucible. The growth rate is controlled to favor the growth of a high quality crystal structure by adjusting the position of the crucible and the heater power. The goal is to obtain vertically aligned grains which indicate good directional growth. In this paper, the wafer quality will be mainly studied by the lifetime variation of minority carries and resistivity as a function of wafer position. This analysis was investigated using a quasi-stationary photo conductance QSSPC technique. The ingot produced with HEM technic has shown the good uniform large grain cm-size with vertically-oriented grain boundaries.

Mots clés: Multi-crystalline silicon, directional solidification, Heat exchange method

Catalyzed Hydro Chlorination of Naphthalene

Ben Mya Omar,  Beddiaf Sofian,  Mahmoudi Abderrahman,  Bouregaa Mondher, 

Résumé: Naphthalene is an organic chemical, with two united benzene rings. It is a residue of petroleum refining processes. It has a stable structure and is resistant to reaction. It is highly toxic and has a known negative effect on the respiratory system. In order to reduce this negative effect, we want to add a chlorine atom to its structure to turn it into mono chloronaphthalene instead of naphthalene, to be less toxic, less diffuse in the air, and nonvolatile substance. Therefore, this work aims to determine the appropriate conditions, reaction time, and most effective catalyst from the list of H3PO4, AlCl3, Al2O3, and Mo/Al2O3 under naphthalene melting temperature (80°C). Results show that Mo/Al2O3is the most effective catalyst, but after 150 minutes of reaction, AlCl3 comes next in effectiveness in the reaction time range from 60 to 150 minutes.

Mots clés: Catalysts; naphthalene; kinetic monitoring; FT IR spectroscopy

Removal of Pharmaceutical Pollutants using a Membrane Hybrid Matrix

Nadour Meriem, 

Résumé: In this work, hybrid carbon-polymeric membranes were synthesized by an immersion-precipitation method using polysulfone (PSf) as the membrane matrix, methylcellulose (MC) as pore forming agent and commercial powdered activated carbon (PAC) as inorganic adsorbent additive. All the components were dissolved in N-methylpyrrolidone (NMP) to prepare the casting solutions. The surface hydrophilicity of the prepared membranes was determined by measuring water contact angle. The effect of methycellulose and activated carbon on the morphology of the membranes was examined by scanning electron microscopy. Hybrid membranes performances were tested in terms of water permeability and rejection of selected pharmaceuticals at a concentration of 10 ppm. Results showed that the hydrophilicity of the hybrid membranes was improved by methylcellulose and activated carbon component. The asymmetric structure of the prepared membranes was more porous by adding activated carbon. The water permeability of the hybrid membranes was better than non-hybrid ones. A high rejection rate was obtained with hybrid carbon-polymeric membranes compared with membranes without carbon.

Mots clés: Hybrid membrane; Methylcellulose; Powdered activated carbon; Pharmaceuticals removal

Hydrogels synthesis, characterization and their medical use

Azizi Amel, 

Résumé: Our work is a contribution to the development and the design of hydrogels with improved properties intended to be used in wound dressing. Hydrogels based on poly (ethylene oxide) and poly (vinylpyrrolidone) were synthesized by the way of irradiation on gamma rays. They were characterized by the follow-up of their gelation rate and by the evaluation of their barrier properties against microbes using a microbiological study.

Mots clés: hydrogel; poly (vinylpyrrolidone); poly (ethylene oxide); burns; Irradiation.

Structural, Electronic and Thermodynamic Properties of ZnX and BeX (X=Se and Te) Binary Compounds

Boumaza Akila,  Nemiri Ouarda,  Touam Selma,  Hamioud Leila,  Oumelaz Feisel,  Ghemid Sebti,  Meradji Hocine, 

Résumé: The semiconductors II-VI play more important role in electronic and optoelectronic devices. Mixing of binary semiconductor II-VI provides new semiconductor alloys and diversifies the physical properties such as band gap, lattice matching, and dielectric constant. Therefore, to investigate the structural, electronic and thermodynamic properties of ZnX and BeX (X=Se and Te) in zinc-blend phase, we have performed first principles calculations using full potential linearized augmented plane wave (FP-LAPW) method within the density functional theory (DFT). We used both the Wu-Cohen (WC-GGA) and the Engel-Vosko generalized gradient (EV-GGA) approximations of the exchange-correlation energy that are based on the optimization of the total energy and the corresponding potential, respectively. The equilibrium lattice constants and bulk modulus are in good agreement with the experimental and available theoretical data. The electronic band structures for these binary compounds are studied. Furthermore, the thermal properties such as Debye temperature (θD), heat specific, and volume expansion coefficient (α) were investigated by employing the quasi-harmonic Debye model. Our results are compared with other calculations and experimental measurements.

Mots clés: Semiconductors; FP-LAPW; Electronic band structure; thermal properties

Thermal Resistance and Tensile Properties Studies on Resin Used for Coating Submitted to Gamma Radiation by 60Co up 50 KGy

Boutouchent-guerfi Nabila,  Tlemçani Omar,  Seddiki Nesrrine, 

Résumé: Polyethylene polymer (PE), is one of the major bulk polymers which is a widely consumed in various applications and it is used as cable coating. The interest of this work is to study the change that can be induced by storage conditions and gamma radiation up to 50 KGy. For this reason, PE compound employed in the manufacture of low and medium voltage electrical cable coating were used, it was dated from: 2015 and 2017. The resin was stored in bags under ambient conditions. Dumbbell samples were prepared and submitted to γ-rays up 50 KGy. Physical, mechanical (tensile strength, elongation at break and Young’s modulus), thermal and morphological characterization was performed on the latter to evaluate the effect of storage. Then, the same characterization was carried out on PE/2017 and PE/2015 compound irradiated. The mechanical, thermal and morphological results showed the mediocre properties of PE/2015 compared to PE/2017, these results revealed that the period of storage has an effect on the properties of PE due to the chain scission, unlike the gamma radiation effect. At 50 KGy, the mechanical, thermal and morphological properties of PE/2015 are improved, which gives a new material resistance and regenerates its properties lost during 3 years of storage.

Mots clés: PE ; coating ; ageing ; mechanical properties ; gamma radiation

Rheological behavior and compressive strength of sustainable self-compacting mortar incorporating ceramic and glass waste powders

بوخلخال ابوبكر, 

Résumé: The purpose of this experimental investigation is to examine the effect of ceramic and glass waste powders as partial cement substitution on the rheological properties and compressive strength of sustainable self-compacting mortar. Nine mixtures have been tested, one as reference mixture and includes only Ordinary Portland cement (OPC), and eight including different proportions of ceramic and glass powders (5, 15, 25 and 50%). The rheology test was carried out to determine yielded stress and plastic viscosity of fresh mortar. Compressive strength was also measured at 28 and 90 days. Experimental results demonstrate that replacing part of cement caused a reduction of the rheological properties, exception for CP in which substitution levels inferior to 25% slightly increased the yield stress. Using GP with 25% resulted in 28 days-compressive strength superior by about 3% to that of the plain cement.

Mots clés: self-compacting mortar; sustainable; ceramic; glass; rheology; strength

Étude comparative de l’impact thermique et de l’impact électronique sur le polymorphisme de la sulfanilamide

Bouzid Mohammed,  Bouda Arezki,  Djadi Amina,  Smail Hacene,  Benmounah Rania,  Bara Rihane,  Ben Chaabane Hafida,  Djemel Fatiha,  Drouiche Nour El Houda, 

Résumé: La sulfanilamide a été choisie comme composé modèle afin de saisir le phénomène de stabilité de ce type de composé médicamenteux à partir de critères énergétiques. L’évolution thermique de la sulfanilamide comme polymorphisme révèle une endothermie à 162,7 °C qui correspond au point de fusion. Entre 400 et 600 °C la sulfanilamide se décompose suite à l’enthalpie de chauffe suivant un mécanisme radicalaire. Par contre, l’impact électronique indique deux profiles de fragmentation: Le schéma similaire à la piste thermodynamique. Par contre le deuxième schéma est issu vraisemblablement d’un réarrangement de fragments dans la chambre d’ionisation.

Mots clés: Sulfanilamide polymorphisme ; Impact thermique ; Impact électronique (SDM)

Development and optimization of biopolymeric microparticles: application of the gelation process by emulsification and characterization

Tidmimt Takfarinas,  Kessal Fetta, 

Résumé: In this work, we developed an internal emulsification gelation process to prepare biopolymeric microparticles with desired characteristics. This process is known to be complex and difficult to optimize. It consists in the cross-linking of sodium alginate by calcium ions encapsulating fenofibrate, an active pharmaceutical ingredient of interest. To reach our objectives, we studied the influence of formulation and process parameters on their physical properties and the release profiles of the fenofibrate they contain. Fenofibrate release performance in both simulated fluids of gastric (SGF) pH = 1.2 and intestinal (SIF) pH = 6.8 was studied. The results obtained showed prolonged and pH-dependent release profiles for all formulations. The concentration of the polymer C1 and the concentration of the cross-linking agent C2 were the most influential parameters. Likewise, freeze-drying process was selected to obtain optimum residual humidity and individualized microparticles.

Mots clés: Microparticles, Sustained release, Internal gelation, Sodium alginate, Fenofibrate

Enhanced flow in the pipeline transportation of Algeria crude oil

Djemiat Djamal Eddine,  Benmounah Abdelbaki,  Safri Abdelhamid, 

Résumé: Several techniques have been used to increase the mobility of crude oil. This work aims to study the concentration effect of the poly (ethylene-co-vinyl acetate) (EVA) on the viscosity, the yield stress and the elastic modulus of crude oil. Three types of (EVA) were selected containing 12%, 18% and 25% of vinyl acetate at different temperatures 6.3 °C, 10°C and 40°C. Different concentrations of (EVA) were tested 100, 200, 300, 400 ppm. The results obtained showed that the EVA improve the rheological parameters of crude oil. The results has indicated that the additive efficiency were significantly influenced by the temperature.

Mots clés: Crude oil ; apparent viscosity ; yields stress ; viscoelastic

Development of biocomposite microparticles based on activated charcoal by the technique of gelification by emulsification

مرزوقي جوهر,  كسال فضة,  بن موناح عبد الباقي, 

Résumé: This work aims to develop and characterize a biocomposite derived from the association of natural biomaterials: Sodium alginate (AS) and Activated charcoal (CA). The microparticles of this biocomposite are prepared by the technique of internal emulsification/gelling from an emulsion water in the oil, adding CaCl2. After optimizing the manufacturing process, these microparticles will be charged in AC at different concentrations (0.2 g, 0.6 g and 1 g) then freeze-dried in order to obtain perfectly individualized microparticles

Mots clés: Sodium alginate, ; activated charcoal, ; biocomposite, ; emulsion, ; internal gelification.

Elaboration et Caractérisation des Films Biodégradables à base de l’Amidon de maїs et de la Cellulose microcristalline

Aoufi Djalila,  Serier Aicha,  Belloul Nabila, 

Résumé: Notre travail porte sur la synthèse et l’élaboration de nouveaux emballages biodégradables issus de ressources renouvelables. Elle consiste à évaluer l’influence de la teneur en cellulose microcristalline (MCC) sur les propriétés barrières de films obtenus à partir de mélanges d’amidon de maïs et de cellulose microcristalline. Les films préparés par casting, pour différentes formulations, sont homogènes, opaques, minces et lisses, présentant une bonne cohésion et sans défauts visuels. Les propriétés des films ont été déterminées par différentes techniques (La spectroscopie FT-IR, l’UV-visible, l’isotherme de sorption et la perméabilité à la vapeur d’eau). Les résultats obtenus, avec une faible teneur en cellulose microcristalline, mettent en évidence une amélioration des propriétés. Les formulations contenant 10% de cellulose microcristalline présentent d’excellentes propriétés barrières aux radiations ultraviolettes ainsi qu’une importante diminution des propriétés d’absorption et barrières à la vapeur d’eau.

Mots clés: Amidon ; cellulose microcristalline ; Glycérol ; Films ; Casting

Effect of C/Si Ratio on Structural Properties of Silicon Carbide Particles Produced By Sol-Gel

Benfadel Karima,  Kaci Samira,  Keffous Aissa,  Benmounah Abdelbaki, 

Résumé: In this study, silicon carbide (SiC) nano-powders were synthesized by the sol-gel method. Sucrose and TEOS have been used as carbon and silicon precursors respectively. Various solutions were prepared by varying the C/Si ratio (3, 4 and 5). The gels obtained were placed inside an alumina tube in the center of an annealing furnace which was heated to 1000°C with a heating step of 20°C/min, after one hour of annealing, the heating is restarted with a step of 10°C/min up to 1500°C under an argon atmosphere, this temperature was held for 3 hours to facilitate the carbothermal reduction. The effect of the C/Si ratio was studied on the structural properties. The XRD indicated that the powders produced under these conditions show the presence of the different phases of SiC. SEM micrographs of SiC powders deposited by sol gel on Si substrates revealed that the C/Si = 3 and C/Si = 4 ratios gave rise to particles with nanometric grain sizes. Maximum yield with reduced grain size and minimum agglomeration were obtained in the case of the powder produced with the ratio C/Si=4. According to the results obtained, the ratio C/Si=4 constitutes the better optimization for obtaining silicon carbide.

Mots clés: silicon carbide ; sol-gel ; C ; C/Si ; XRD ; SEM

Influence of sintering temperature on the structure, morphology and bioactivity of bioactive glass powders

Ksouri Dalila ,  Hkireddine Hafit ,  Aksas Ali ,  Valente Tiago ,  Bir Fatima ,  Slimani Nadir ,  Domingos Santos José , 

   Publication date: 03-05-2017    pages  11-17.   
Characterization of Silica Sandstone for Photovoltaic Application.

Anas Boussaa Sabiha ,  Kheloufi A. ,  Boutarek Zaourar N. ,  Kefaifi A. ,  Kerkar F. , 

   Publication date: 03-05-2017    pages  76-79.