Graft Polymerization of Polyacrylonitrile onto Rubber (Hevea brasiliensis) Seed Shell-Cellulosic and its Utilization Potential for Heavy Metal Uptake from Aqueous Medium
 /  Graft Polymerization of Polyacrylonitrile onto Rubber (Hevea brasiliensis) Seed Shell-Cellulosic and its Utilization Potential for Heavy Metal Uptake from Aqueous Medium

Graft Polymerization of Polyacrylonitrile onto Rubber (Hevea brasiliensis) Seed Shell-Cellulosic and its Utilization Potential for Heavy Metal Uptake from Aqueous Medium


L.O. Ekebafe a, J.E. Imanah, M. O. Ekebafe and S. O. Ugbesia

ABSTRACT

Graft polymerization of polyacrylonitrile onto cellulosic material obtained from Rubber (Hevea brasiliensis) seed shell using ceric ammonium nitrate as initiator was investigated. The conditions of grafting (e.g. duration of soaking of cellulosic material in ceric ammonium nitrate solution, concentration of ceric ammonium nitrate solution, polymerization time, temperature of reaction, acrylonitrile concentration and saponification time) to study their influence on percent grafting yield and grafting efficiency were evaluated. The resulting cellulose –gpolyacrylonitrile
(PAN) copolymers were fractionated by extraction at room temperature with N, N’ dimethylformamide. Fractions were characterized by determining the % add-on, % grafting, % grafting efficiency, and the % free polymer. Saponification of the cellulose –gpolyacrylonitrile isolated with methanol precipitation on drying gave a good water absorbing properties as super slurpers. The grafting was confirmed using FTIR. Sorption of different metal ions in the mixture (e.g., Cr, Mn, Ni, Cu, and Pb) by grafted cellulosic and the hydrogel was also investigated. Hydrolysis increases the sorption affinity of grafted cellulose toward water and metal ions.

Journal Article
PDF, 137.2 KB
Creative Commons LicenseCreative Commons license
Chemical Sciences
Chemistry
N/A
Christian Bassey
17th April, 2018
17th April, 2018
http://oer.mciu.edu.ng/wp-content/uploads/2015/04/Graft-polymerization-of-polyacrylonitrile-onto-rubber-Hevea-brasiliensis-seed-Dr.-Joseph-Imanah.pdf


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