Publications Internationales
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Item Application of Fourier Transform Infrared (FT-IR) Spectroscopy to the Study of the Modification of Epoxidized Sunflower Oil by Acrylation(Sage journals, 2012) Irinislimane, Ratiba; Belhaneche-Bensemra, NaimaCommercial sunflower oil was epoxidized at the laboratory-scale. The epoxidized sunflower oil (ESFO) was modified following the acrylation reaction. Modification was carried out simultaneously using acrylic acid (AA) and triethylamine (TEA). To optimize the reaction conditions, the effects of four temperatures (40, 60, 80, and 100 °C), the ESFO:AA (100:100) ratio, and 0.2% TEA were investigated. The rate of conversion was analyzed with both FT-IR and titration of the oxirane ring. After that, the temperature with the highest conversion was selected and used throughout for all modification reactions. Then, four ratios (100:100, 100:90, 100:80, and 100:75) of ESFO:AA were analyzed at four different concentrations of TEA (0.2, 0.3, 0.4, and 0.5%) to determine the best estimate for both the ESFO:AA ratio and the catalyst concentration. Conversion rate was analyzed using FT-IR spectroscopy by measuring the concentrations of ester, carbonyl, and alcohol groups. Moreover, oxirane***ring concentration was estimated using the titration method (with gentian violet as indicator) and FT-IR spectroscopy (epoxy ring absorptions at 1270 cm−1 and 877 cm−1). Based on conversion yield, the optimum ESFO:AA ratio corresponds to 100:80; the best temperature reaction was at 60 °C, and the best TEA concentration was 0.2%. The critical amounts of reactants needed to reach maximum conversion were established. The final acid value of the acrylated ESFO after washing (pH = 7) was 2.1 mg potassium hydroxide (KOH) g−1. All results show that FT-IR spectroscopy is a simple, low-cost, rapid method for investigating the kinetics of a reactionItem Valorization of peach stones to high efficient activated carbon : synthesis, characterization, and application for Cr(VI) removal from aqueous medium(Taylor & Francis, 2018) Khemmari, Fariza; Benrachedi, KhaledItem Preparation and Characterization of Metals nanostructures supported on zeolitic and clay, application in the transformation of glycerol(2016) Boualouache, Adel; Belamri, Laid; Boucenna, Ali; Khalili, BenyoucefItem Modeling of porosity by geostatistical methods(Springer, 2019) Ketteb, Rachid; Djeddi,Mabrouk; Kiche,YacineItem Catalytic preparation, characterization and performance isomerization of M-Xylene by modified montmorillonite prepared by microwave(2013) Chemat- Djennia, Zoubida; Yelda Bakoz, Pemanos; Hamada, BoudjemaItem Formulation and Physico-Mechanical characterization of a Self-Compacting concrete containing seashells as an addition material(2015) Safi, Brahim; Saidi, Mohammed; Benmounah, A.; Mitterpach, JozefItem Production and characterization of particleboards from cork-rich Quercus cerris bark(Springer, 2017) Lakreb, Nadia; As, Nusret; Gorgun, Volkan; Sen, Umut; Gomes, M. Glória; Pereira, HelenaItem Production and characterization of particleboards from cork-rich Quercus cerris bark(Springer, 2017) Lakreb, Nadia; Nusret, As; Volkan, Gorgun; Umut, Sen; M. Glória, Gomes; Helena, PereiraItem Synthesis and characterization of β-cyclodextrin-benzoic acid inclusion complex and grafting with cellulosic polymer(2012) Ghemati, Dj.; Aliouche, DjamelItem Elaboration and characterization of conducting nanocomposite inorganic/organic(Editions de l'Academie Republique Populaire, 2014) Ghebache, Z.; Djelali, Nacer-Eddine; Zitouni, S.