Characterization of phosphorylated natural rubber as thorium bio-adsorbent prepared by radiation-induced graft polymerization. (October 2021)

• Record Type: Journal Article
• Authors: Md Jaffary, Nurrul Assyikeen; Mohamed, Nor Hasimah; Siong, Khoo Kok; Fadzil, Syazwani Mohd; Hamdan, Siti Nor Syuhada; Ungku Azly, Ungku Aida Farzana; Aziz, Nurul Munawwarah; Hashim, Azian; Um, Wooyong
• Is Part Of: Radiation physics and chemistry. Volume 187(2021)
• Publication Date: 2021-10
• Subjects: Natural rubber -- Seeded polymerization -- Ionizing radiation -- GMA -- Functionalization -- Thorium; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2021.109546
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: Bio-adsorbent modified natural rubber (NR) was prepared by radiation-induced graft polymerization of glycidyl methacrylate (GMA) onto NR seed particle in a latex form using gamma irradiation at a dose of 5–100 kGy followed by subsequent chemical modification with phosphoric acid by ring-opening of epoxy. The adsorbent was characterized with Fourier Transformed Infrared Spectroscopy (ATR- FTIR), 1 H Nuclear Magnetic Resonance Spectroscopy ( 1 HNMR), Thermogravimetry Analyzer (TGA), and Field Emission Scanning Electron Microscopy (FESEM-EDX). In addition, the effect of volume ratio GMA-emulsion to latex at different radiation doses during grafting polymerization was studied in order to attain optimal grafting condition. The goal of this research is to produce a material capable of removing Th 4+ ion from aqueous solutions. The effects of the initial concentration on adsorption capacity was presented. This study introduces a new step in the modification as an added value to the NR in Th 4+ removal application. Highlights: This study examines the new NR based bio adsorbent for Th4+ ion removal application. GMA molecules interact with radicals' sites of the poly-isoprene backbone. Chemical shifting in 1HNMR indicating the successful attachment of PGMA on the NR. The PGMA grafting and P–OH functionalization introduced thermal stability due to decreasing of unsaturated sites.