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    Organic-inorganic hybrid zeolite silica materials by grafting of trimethylchlorosilane TMCS: part I: preparation and characterization
    (ALJEST, 2021) Bouchher, Omar; Benrachedi, K.; Makhlouf, M.; Messabih, S. M.; Louhab, K.
    The functionalization of our 13X zeolite was carried out by the post-synthesis method using an organosilane of the Trimethylchlorosilane type (TMCS) to obtain a more hydrophobic organic-inorganic hybrid zeolite. Our zeolite before and after grafting was characterized by different analysis techniques (XRD, FTIR, BET, and SEM). The XRD results of the grafted 13X zeolite, show that the functionalization does not destroy the crystal structure of the material. FT-IR analysis of the 13X zeolite before and after grafting confirms the grafting of our organosilane on the surface by the disappearance of the absorption band of the silanol groups at 980 cm-1 and the appearance of a band of absorption attributed to the vibrations of the trimethylsilyl Si (CH3) group at 2970 cm-1. The specific surface area of our grafted 13X has been reduced by 63.22 m2 / g thanks to the organic group which has been grafted on the external surface. According to SEM results, the morphology of the surface of our material was slightly modified after grafting. The results of various analyses demonstrated that the grafted 13X zeolite is successfully obtained using the post-synthesis method.
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    Biotreatment on cellulose fluff pulp : quaternary ammonium salts finish and grafting with β -cyclodextrin
    (2009) Ghemati, Djamila; Aliouche, Djamel; Oudia, Atika; Lamouri, Saad
    For its potential performances to be expanded, cellulose needs to be processed in different ways. Therefore, an object of the present work was to provide a chemical modification of cellulose through: a specific finish with two quaternary ammonium salts (namely Aliquat 336 and Aliquat 1529, respectively). Chemical grafting of β -cyclodextrin derivative ( β -CD) onto fibers followed by the inclusion of benzoic acid in the grafted CD cavities as a probe chemical. Physicochemical properties and performances of the untreated and treated fibers have been determined with infrared spectra, microscopy, swelling measurements, antimicrobial finishing tests, and dye adsorption. Our results show that cellulose fibers can be efficiently modified with no significant changes in its structural and surface properties; the treated fibers show an attractive behavior in swelling, dye adsorption and antibacterial activity