Abstract
Radiation induced graft polymerization (RIGP) was used to develop glycidyl methacrylate (GMA) grafted nanohybrid polymer. The absorbed dose and monomer concentration significantly affect the degree of grafting on vinyl modified sepiolite (VMS). Maximum grafting of 665% was achieved at optimized absorbed dose and monomer concentration. Post-polymerization modification of the nanohybrid with maximum grafting was carried out with sodium sulfite. Structural studies by ATR-FTIR and XRD analysis of the synthesized nanohybrids confirmed modification at different stages. The morphological changes studied by field emission scanning electron microscopy (FESEM) showed the conversion of sepiolite fiber into globular structure. Thermal gravimetric analysis (TGA) revealed an increase in thermal stability of the GMA grafted nanohybrid with the increase in grafting yield. The sulfonated form of the nanohybrid showed highest adsorption for Cu(II) at 4 pH value which indicates its potential as metal ion adsorbent for the recovery of metals from wastewater.
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