SIDALI Zernadji

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SIDALI Zernadji

سيد علي زرناجي

sidali.zernadji@univ-msila.dz

0554526091

  • Departement of MECHANICAL ENGINEERING
  • Faculty of Technology
  • Grade PHd
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About Me

Education

master ouvrages chaudronnées et piping. in جامعة امحمد بوقرة بومرداس

Domain

Science et Technologies

Research Domains

هندسة ميكانيكية materiaux composites, ouvrages chaudronnes et piping, controle

Filiere

Génie Mécanique

Mechanical Construction

Location

Msila, Msila

Msila, ALGERIA

Code RFIDE

  • 2023-10-25
  • 2023-10-25

    Extraction and characterization of novel natural cellulosic fiber from Echinops spinosissimus plant stem

    Bio-based composites are outstanding materials to replace many synthetic fiber-based composites due to their biodegradability and sustainable environmental properties. This research aims to characterize and analysis a new cellulosic fibers extracted from Echinops spinosissimus plant stem, to study their integration in the field of various industries such as composites and textiles. Thus, adding and incorporating a new natural fiber to the list of fibers that enter into the production of Bio-based composites materials, and meet the needs of the market that knows a shortage of these materials. In addition, the extracted fibers from Echinops spinosissimus plant, which is abundant and have acceptable properties that can replace the synthetic fibers. The stem anatomy results showed a strong presence of fiber cells, fiber SEM micrographs showed that fiber surface become rough, these fibers have a density of 0.97 ± 0.01 g/cm3, and diameter 280.76 μm. FTIR and XRD showed that these fibers are cellulosic. Thermal analysis revealed that Echinops spinosissimus fiber have a thermal stability of 208°C. Tensile strength, Young modulus and strain at failure were found as 217.54 ± 54.16 MPa, 19.23 ± 0.76 GPa and 3.78 ± 0.36%, respectively. SEM showed that the studied fiber becomes more roughness in the outer surface following the chemical treatments, thus contributing to better adhesion with resin. This work confirmed that Echinops spinosissimus fibers are suitable materials for use in textile and biocomposite applications.

    Citation

    sidali ZERNADJI , MOHAMED Benhamida , MANSOUR Rokbi , , (2023-10-25), Extraction and characterization of novel natural cellulosic fiber from Echinops spinosissimus plant stem, Journal of Composite Materials, Vol:57, Issue:29, pages:4503-4519, sage journal

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  • 2023-02-21
  • 2023-02-21

    Mechanical properties of Unsatured Venylester biocomposites reinforced by Coir fibers chemically treated with permanganate solution

    Talking about lightweight composite materials reinforced with natural plant cellulosic fibers is a topic of the hour; this is due to the characteristics of these materials such as low cost, non-toxicity and most importantly, their mechanical performances. This is what prompted scientists to search for new materials and include them in various fields such as industry, medicine, and others. In this research paper, a chemical treatment was carried out by pretreated the Coir fibers in a solution of Alkaline (NaOH) with a ratio of 3% for a period of 4 hours, then immersed in permanganate solution with a ratio of 0.066 % for 3 minutes. To use these fibers as a reinforcing material in the Unsatured Venylester (UV) resin, to obtain a composite material, after that the samples are prepared to conduct mechanical tensile tests according to the ASTM D3322-01 Standard applied on 30 samples tests to obtain the average values of tensile properties (Tensile strength, young’s modulus and strain at failure). The results showed an improvement in the mechanical properties that would raise the efficiency and performance of the composite material, and this is due to the improvement of the properties of the Coir fibers after the chemical treatment with Permanganate. Which is largely consistent with the results of previous research.

    Citation

    sidali ZERNADJI , MOHAMED Benhamida , MANSOUR Rokbi , ,(2023-02-21), Mechanical properties of Unsatured Venylester biocomposites reinforced by Coir fibers chemically treated with permanganate solution,1st International Conference on Frontiers in Academic Research,Konya/Turkey

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  • 2022-01-08
  • 2022-01-08

    Estimation of fiber/polymer bond strength from maximum load values recorded in the micro-bond tests

    In the last few years, several techniques for separate determination of adhesion and friction in micromechanical tests have been developed but their experimental realization is rather complicated, because they require an accurate value of the external load at the moment of the crack initiation. So, in this perspective, an effort is done to estimate the interfacial parameters between two kind of thermoset resins and the natural Alfa fiber determined from Microbond tests. As known, the diameter of natural fiber is a crucial factor that participates in the estimation of the interfacial adhesion characteristics. In others words, the measurement of the maximum force required to pull out a fiber from the polymeric resins is investigated by using the micro-droplet test.

    Citation

    sidali ZERNADJI , MANSOUR Rokbi , MOHAMED Benhamida , , (2022-01-08), Estimation of fiber/polymer bond strength from maximum load values recorded in the micro-bond tests, Materials Today: Proceedings, Vol:53, Issue:2022, pages:247–252, Science Direct, Elsevier

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  • 2022
  • 2022

    INVESTIGATION OF THE INTERFACIAL ADHESION BETWEEN JUTE FIBERS AND THE POLYMER MATRIX BY MICRO-BOND TESTS

    During the past years, natural fibers have attracted the thinking and interest of a large number of researchers and scientists in the fields of natural fiber compounds named green compounds due to the nature of the compound’s reinforcing composites, which is what linked the name of compounds to the color of fiber extracted from plants. The researchers considered this research as a major axis and made its development their main concern because composites materials have been widely used in engineering fields like civil, automotive, and aerospace industry, due to their high light weight, strength, and longue life expectancy thanks to the properties of these reinforcing materials In the present study, biocomposites were prepared from thermoset resins named unsatured Polyester (UP) as matrix, and Jute ( Corchorus capsularis ) as natural reinforcing fibers, requires a strong adhesion between fiber and matrix, biocomposites were prepared by putting small drops of synthetic matrix (UP) on the untreated and 3% NaOH alkali treated jute fibers. The mechanical properties of the jute fibers were studied by tensile strength tests, where mechanical properties of biocomposites prepared were characterized in terms of microbond tests, by estimating the values of external loads at moment of crack initiation. The results of mechanical properties showed a significant improvement for tensile strength and young's modulus was observed for treated jute fiber, also a good interfacial adhesion with treated jute fibers and matrix due to the rough fiber surface resulting by chemical treatment.

    Citation

    sidali ZERNADJI , MANSOUR Rokbi , MOHAMED Benhamida , ,(2022), INVESTIGATION OF THE INTERFACIAL ADHESION BETWEEN JUTE FIBERS AND THE POLYMER MATRIX BY MICRO-BOND TESTS,ICAENS 2022,Konya/Turkey

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  • 2022
  • 2022

    STUDY OF THE INTERFACIAL ADHESION BETWEEN SISAL FIBERS AND THE POLYMER MATRIX BY MICRO-BOND TESTS

    composites materials have been widely used in engineering fields like civil, automotive, and aerospace industry, due to their high light weight, strength, and longue life expectancy. In the present study, biocomposites were prepared from thermoset resins named unsatured Polyester (UP) as matrix, and sisal ( Agave fourcroydes) as natural reinforcing fibers, requires a strong adhesion between fiber and matrix., biocomposites were prepared by putting small drops of synthetic matrix (UP) on the untreated and 3% NaOH alkali treated sisal fibers. The mechanical properties of the sisal fibers were studied by tensile strength tests, where mechanical properties of biocomposites prepared were characterized in terms of microbond tests, by estimating the values of external loads at moment of crack initiation. The results of mechanical properties showed a significant improvement for tensile strength and young's modulus was observed for treated sisal fiber, also a good interfacial adhesion with treated sisal fibers and matrix.

    Citation

    sidali ZERNADJI , MANSOUR Rokbi , MOHAMED Benhamida , ,(2022), STUDY OF THE INTERFACIAL ADHESION BETWEEN SISAL FIBERS AND THE POLYMER MATRIX BY MICRO-BOND TESTS,IMMAT' 2022,Sousse, Tunisie

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  • 2022
  • 2022

    ESTIMATION OF FIBER/ POLYMER BOND STRENGTH FROM MAXIMUM LOAD VALUES RECORDED IN THE MICRO BOND TESTS

    in this work, we made a statistical study that includes the length of a drop of resin of its two types (Polyester /vinyl ester) and the diameter of the raw and alkali-treated Alfa fiber. Each time we change the dimension of the resin drop, and because the natural plant fibers are unequal in diameter, we have an automatic change in the diameters of this latter, which is one of the factors that it intervened in the estimation of the strength of the interfacial adhesion. Where the effect of all these factors on the results of the experiment was discussed, especially for the interfacial shear strength which is one of the most interesting results. Which showed us that the force required to pull out the treated alfa fibers from the resin (Polyester /vinyl ester) is a greater value compared to the raw alfa fibers.

    Citation

    sidali ZERNADJI , MANSOUR Rokbi , MOHAMED Benhamida , ,(2022), ESTIMATION OF FIBER/ POLYMER BOND STRENGTH FROM MAXIMUM LOAD VALUES RECORDED IN THE MICRO BOND TESTS,PMFIC 2021,Béjaia

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