Protonated Montmorillonite Clay Used as Green Non-toxic Catalyst for the Synthesis of Biocompatible Polyglycidol

El-Kebir, Aslya; Harrane, Amine; Belbachir, Mohammed

doi:10.1007/s13369-015-1862-z

Cited by 10 publications

(2 citation statements)

References 15 publications

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“…The appearance of a series of characteristic peaks confirms that Maghnite is composed essentially by montmorillonite fraction ( Table 1). The characterization measurements [26,[30][31] show that Maghnite is an aluminosillicate montmorillonite clay with the basic repeating unit of…”

Section: Characterization Of the Catalystmentioning

confidence: 99%

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A New Green Catalyst for Synthesis of bis-Macromonomers of Polyethylene Glycol (PEG)

Haoue¹,

Derdar²,

Belbachir³

et al. 2020

ChChT

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A new method to synthesise polyethylene glycol dimethacrylate (PEGDM) with various molecular weights (1000, 3000, 6000 and 8000 g/mol) of polyethylene glycol (PEG) has been developed. This technique consists in using Maghnite-H+ as eco-catalyst to replace еriethylamine, which is toxic. Maghnite-H+ is a proton exchanged montmorillonite clay which is prepared through a simple exchange process. Synthesis experiments are performed in solution using dichloromethane as solvent in the presence of methacrylic anhydride. The effect of reaction time, temperature, amount of catalyst and amount of methacrylic anhydride is studied in order to find the optimal reaction conditions. The synthesis in solution leads to the best yield (98 %) at room temperature for the reaction time of 5 h. The structure of the obtained macromonomers (PEGDM) is confirmed by FTIR, 1H NMR and 13C NMR, where the methacrylate end groups are clearly visible. Thermogravimetric analysis (TGA) is used to study the thermal stability of these obtained macromonomers. The presence of unsaturated end group was confirmed by UV-Visible analysis.

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Section: Characterization Of the Catalystmentioning

confidence: 99%

“…Maghnite-H + is acidified Algerian montmorillonite clay. It exhibits a high cationic exchange capacity (CEC = = 91 meq/100g) [26] and good efficiency for cationic polymerization of vinylic and heterocyclic monomers [27][28][29][30][31] and presents the advantage to be non-toxic, ecologic, economic, and regenerable by simple filtration.…”

Section: Introductionmentioning

confidence: 99%