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Green thermal-assisted synthesis and characterization of novel cellulose-Mg(OH)2 nanocomposite in PEG/NaOH solvent

Ponomarev, Nikolai, Repo, Eveliina, Srivastava, Varsha, Sillanpää, Mika
Carbohydrate polymers 2017 v.176 pp. 327-335
Fourier transform infrared spectroscopy, X-ray diffraction, cellulose, cost effectiveness, crystal structure, energy-dispersive X-ray analysis, hydroxyl radicals, magnesium chloride, magnesium hydroxide, nanocomposites, nanomaterials, polymers, porosity, porous media, scanning electron microscopy, sodium hydroxide, solvents, temperature, thermal stability, transmission electron microscopy
Synthesis of nanocomposites was performed using microcrystalline cellulose (MCC), MgCl2 in PEG/NaOH solvent by a thermal-assisted method at different temperatures by varying time and the amount of MCC. Results of XRD, FTIR, and EDS mapping showed that the materials consisted of only cellulose (CL) and magnesium hydroxide (MH). According to FTIR and XRD, it was found that crystallinity of MH in cellulose nanocomposites is increased with temperature and heating time and decreased with increasing of cellulose amount. The PEG/NaOH solvent has a significant effect on cellulose and Mg(OH)2 morphology. BET and BJH results demonstrated the effects of temperature and cellulose amount on the pore size corresponding to mesoporous materials. TG and DTG analyses showed the increased thermal stability of cellulose nanocomposites with increasing temperature. TEM and SEM analyses showed an even distribution of MH nanostructures with various morphology in the cellulose matrix. The cellulose presented as the polymer matrix in the nanocomposites. It was supposed the possible interaction between cellulose and Mg(OH)2. The novel synthesis method used in this study is feasible, cost-efficient and environmentally friendly.