Enhanced amination and adsorption performance of functional copolymer synthesized via RAFT-mediated radiation grafting in emulsion

Madrid, Jordan F.; Ueki, Yuji; Abad, Lucille V.; Yamanobe, Takeshi; Seko, Noriaki

doi:10.1007/s10965-018-1585-4

Cited by 4 publications

(1 citation statement)

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“…PGMA epoxides can react to a variety of nucleophiles such as amines, thiols, azides, and carboxylic acids in order to produce polymers that have the same molecular weight attributes as the parent PGMA but with added functionalities. 27,28 The current study aims to produce and characterize a radiation grafted adsorbent from PP fabric through electron beam pre-irradiation grafting method with subsequent immobilization of P-containing ligand. The synthesized adsorbent was tested for its adsorption performance.…”

Section: Introductionmentioning

confidence: 99%

Immobilization of an organophosphorus compound on polypropylene‐g‐poly(glycidyl methacrylate) polymer support and its application in scandium recovery

Madrid¹,

Barba²,

Pomicpic³

et al. 2021

J of Applied Polymer Sci

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Scandium is a rare earth element that has a wide range of uses in modern technology. The conventional recovery of scandium is commonly done by solvent extraction using organophosphorus compounds. This process however produces a lot of waste extractants. To circumvent this challenge, a model organophosphorus compound phenylphosphinic acid (PPI) was immobilized to a polymer support fabric to produce a Sc(III) adsorbent for high throughput scandium recovery with less waste generation. Polymer support (PP-g-PGMA)for the organophosphorus compound was synthesized using radiation-induced graft polymerization. Successful post-polymer modification of the PGMA grafts to attach PPI groups was carried out using 1 M PPI in isopropanol at 80 C for 4 h, achieving a maximum functional group density of 1.32 mmol/g. The obtained PP-g-PGMA-PPI fabrics were used in the batch Sc(III) adsorption experiments. The results showed that PP-g-PGMA-PPI effectively adsorbed low concentrations of Sc(III) at a pH of at least 2.0. More than 98% adsorption was achieved using 1 ppm Sc(III). The synthesized adsorbent was also shown to be selective for Sc(III) even in the presence of Fe(III) and Al(III) ions. PP-g-PGMA-PPI adsorbent fabrics are therefore promising alternatives to solvent extraction methods and ion-exchange granular resin technologies in the recovery of scandium.

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Section: Introductionmentioning

confidence: 99%