NOURI Laib

Allal Maria , Abdelkani Aida

Etude et caractérisation d`un matériau composite à base de fibre végétal (ALFA)

Belkaibech Sabah , Ameur Kounnouz

Etude de l’effet des traitements chimiques sur la morphologie structurale des fibres végétales

Zerrou Ahlam , Beroubi Nour Elhouda

Etude de l'effet des traitements chimiques par KMnO4 sur les fibres végétales

Djaidja Ferial , Saddouk Asma

Etude et caractérisation de l’effet des traitements chimiques par NaOH sur la morphologie structurelle des fibres végétales

عشور عبدالغاني , بن شريف لطفي

تحضير المواد المركبة (مصنع مغرب أنابيب بالمسيلة)

Benguettaf Halima , Hachadi Lemya

Etude comparative des activites biologique des deux plantes médicinale de la famille lamiacees et apiaceae

In this work, two types of solvents ethanol or water were used in preparation of the LaFeO3 catalysts by citrate sol gel method. The obtained samples were subjected to various calcination temperatures in order to study the catalytic activity and stability for methanol electro-oxidation by XRD, cyclic voltammetry and chronoamperometry. The crystallinity of the LaFeO3 phase in both cases is improved with increasing calcination temperature. The samples prepared using ethanol exhibit higher catalytic properties than those prepared in water for different calcination temperatures. Moreover, the catalyst prepared in ethanol and calcined at 1050 °C, exhibits a high catalytic activity in methanol electro- oxidation and is ~ two times greater than that obtained at 750 °C. Keywords: Solvent effect ; Calcination temperature ; Methanol oxidation; cyclic voltammetry; chronoamperometry

Citation

Nouri LAIB , ,(2024-05-03), Study of the influence of synthesis conditions on the physicochemical properties on LaFeO3 Catalysts for Methanol Oxidation,10th International Conference on Green Energy & Environmental Engineering "GEEE-2024",Tunisie

The composite was prepared using Alfa fibers a s a reinforcement of the unsaturated polyester matrix and marble as an additive, the aim of this study is to improve the mechanical properties of this composite. Vegetable fibers are characterized by high physical and chemical properties that are abundant in nature light weight biodegradability and low cost these properties made vegetable fibers competitive with synthetic fibers in the preparation of composites, to improve the surface of the Alfa fibers we treated them with benzoyl, permanganate 0.2 %, alkali treated 9 % for 24 h and placed in the microwave for 10 min. The results obtained from the tests conducted on the composite and fiber showed that the treatment with NaOH at a concentration of 9 % for 24 h had an effect in improving the mechanical properties of the composite and the fibers compared to the untreated fibers Other treatments also proved that the added marble had a significant effect in improving the mechanical behavior.

Citation

Nouri LAIB , ,(2023-12-14), The effect of additives and chemical treatment on mechanical properties of a composite material,1st international Conference On Civil and Earthquake Engineering (ICCEE2023),Annaba

Les fibres naturelles sont connues depuis longtemps et sont utilisées comme renfort dans la fabrication de matériaux composites[1-3]. En particulier, dans le domaine de l'emballage, de la santé, de la pharmacie, de la construction automobile et dans le domaine aéronautique [4]. Les fibres naturelles présentent de nombreux avantages tels que; disponibilité, faible coût, faibles densités, rigidité, biodégradabilité et ont un comportement mécanique important [5]. De nombreux chercheurs ont observé que la préparation de matériaux composites renforcés de fibres naturelles peut améliorer l'efficacité mécanique de ces composites [6]. Laib et al. [7] ont préparé un matériau composite à partir d'une matrice de polyester insaturé avec des fibres de Luffa, qui a subi différents traitements chimiques (NaOH, permanganate, dichromate, silane et eau de Javel) afin d'améliorer l'adhérence interfaciale fibre-matrice. L'objectif de ce manuscrit est de étudier l'effet d'un traitement alcalin et du temps de traitement sur les propriétés mécaniques d'un matériau composite à base d'une matrice thermodurcissable (polyester insaturé) renforcé de fibres Alfa

Citation

Nouri LAIB , ,(2023-10-26), Valorisation Et Traitement Des Déchets Végétaux Pour Préparer Des Matériaux Composites.,1er Séminaire national sur Le défi de la gestion des déchets entre destruction et valorisation,Khenchela

Les fibres naturelles sont connues depuis longtemps et sont utilisées comme renfort dans la fabrication de matériaux composites. En particulier, dans le domaine de l'emballage, de la santé, pharmaceutique, automobile et dans le domaine aéronautique. Fibres naturelles ont de nombreux avantages tels que; disponibilité, faible coût, faibles densités, rigidité, biodégradabilité et ont un comportement mécanique important. De nombreux chercheurs ont observé que la préparation de matériaux composites renforcés de fibres naturelles peut améliorer la résistance mécanique l'efficacité de ces composites. ont préparé un matériau composite à partir d'un matrice de polyester insaturé avec des fibres de Luffa, qui a subi différentes traitements (NaOH, permanganate, dichromate, silane et eau de Javel) afin d'améliorer la adhérence iterfaciale fibre-matrice. L'objectif de ce manuscrit est d'étudier l'effet de traitement alcalin et temps de traitement sur les propriétés mécaniques d'un matériau composite à base d'une matrice thermodurcissable (polyester insaturé) renforcée de fibres Alfa.

Citation

Nouri LAIB , ,(2023-10-25), Valorisation et traitementchimique des fibres végétales pour préparer des matériaux composites,WATER, HEALTH AND ENVIRONMENT IMPACT OF VLIMATE CHANGES,Khenchela

Les fibres naturelles sont connues depuis longtemps et sont utilisées comme renfort dans la fabrication de matériaux composites. En particulier, dans le domaine de l'emballage, de la santé, pharmaceutique, automobile et dans le domaine aéronautique. Fibres naturelles ont de nombreux avantages tels que; disponibilité, faible coût, faibles densités, rigidité, biodégradabilité et ont un comportement mécanique important. De nombreux chercheurs ont observé que la préparation de matériaux composites renforcés de fibres naturelles peut améliorer la résistance mécanique l'efficacité de ces composites. ont préparé un matériau composite à partir d'un matrice de polyester insaturé avec des fibres de Luffa, qui a subi différentes traitements (NaOH, permanganate, dichromate, silane et eau de Javel) afin d'améliorer la adhérence interfaciale fibre-matrice. L'objectif de ce manuscrit est d'étudier l'effet de traitement alcalin et temps de traitement sur les propriétés mécaniques d'un matériau composite à base d'une matrice thermodurcissable (polyester insaturé) renforcée de fibres Alfa.

Citation

Nouri LAIB , ,(2023-10-21), Valorization and chemical treatment of Vegetable Fibers to prepare the Composites Materials,4ᵗʰ National Seminar of Biology and Health Hybrid Seminar,SIDI BELABBES

The composite was prepared using Alfa fibers a s a reinforcement of the unsaturated polyester matrix and marble as an additive, the aim of this study is to improve the mechanical properties of this composite. Vegetable fibers are characterized by high physical and chemical properties that are abundant in nature light weight biodegradability and low cost these properties made vegetable fibers competitive with synthetic fibers in the preparation of composites, to improve the surface of the Alfa fibers we treated them with benzoyl, permanganate 0.2 %, alkali treated 9 % for 24 h and placed in the microwave for 10 min. The results obtained from the tests conducted on the composite and fiber showed that the treatment with NaOH at a concentration of 9 % for 24 h had an effect in improving the mechanical properties of the composite and the fibers compared to the untreated fibers Other treatments also proved that the added marble had a significant effect in improving the mechanical behavior

Citation

Nouri LAIB , ,(2023-06-17), The effect of additives and chemical treatment on mechanical properties of a composite material,THE NATIONALVIRTUAL CONFERENCE ALGERIAN CONFERENCE ON MECHANICS AND SOLAR ENERGY,Ouargla

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

Vegetable fibers are characterized by high physical and chemical properties that are abundant in nature light weight biodegradability and low cost these properties made vegetable fibers competitive with synthetic fibers in the preparation of composites, to improve the surface of the Alfa fibers we treated them with benzoyl, permanganate 0.1 %, alkali treated 10 % for 24 h and placed in the microwave for 15 min. The results obtained from the tests conducted on the composite and fiber showed that the treatment with NaOH at a concentration of 10 % for 24 h had an effect in improving the mechanical properties of the composite and the fibers compared to the untreated fibers Other treatments also proved that the added marble had a significant effect in improving the mechanical behavior. Among the diagnostic tests used in this study are infrared spectroscopy, tensile test.

Citation

Nouri LAIB , ,(2022-12-13), The effect of additives of chemical treatment on the physical properties and morphological structure of plant fibers,1st international Conference On Innovative Materials for Sustainable Development,Annaba

Environmental and energy conservation pressure has led to a dramatic increase in the need for economically feasible lightweight materials that can be better substituted for non-biodegradable materials in reinforced composites. To this end, this study examines composite materials prepared from unsaturated polyester resins reinforced with treated and untreated Alfa fibers. Fiber treatment was carried out by NaOH solution of 5% concentration at different times (1, 3, 5 and 24 h). The strength and flexural modulus of the composites were evaluated according to the ASTM D790 test method. The analytical results indicate that the fibers’ alkaline pretreatment time had a positive influence on the mechanical properties of the composites. Keywords: composite, Stipa tenacissima, adhesion, flexion, hydrophilic, alkaline treatment

Citation

Azzedine BENYAHIA , Nouri LAIB , Nadir DEGHFEL , yakout.addour@univ-msila.dz, , (2022), Effect of alkaline treatment time on flexural properties of Alfa fiber/Unsaturated polyester composite, Cellulose Chemistry and Technology, Vol:56, Issue:9, pages:1081-1088, Lilia Daringa