Poly(sodium 4‐styrene sulfonate) and poly(2‐acrylamido glycolic acid) polymer–clay ion exchange resins with enhanced mechanical properties and metal ion retention

Abstract

This research presents the synthesis of novel nanocomposite ion exchange resins based on poly(sodium 4-styrene sulfonate) and poly(2-acrylamido glycolic acid). Nanocomposites were synthesized by in situ radical polymerization using organic modified montmorillonite as filler and different clay contents. Loaded resins showed improvements in mechanical properties compared with unloaded resins: specifically, when the nominal montmorillonite content was 2.5 wt%, poly(sodium 4-styrene sulfonate) nanocomposite increased its shear modulus from 323 to 910 Pa and doubled its elastic recovery ratio, and the yield point was almost 20 times higher than for unloaded resins. In the case of metal ion retention, the effect of pH and clay content were studied for Cd(II), Pb(II), Cu(II), Cr(III) and Al(III) by a batch procedure. Results showed high efficiency, reaching over 80% after only 1 h of contact. Poly(2-acrylamido glycolic acid) presented a higher pH dependence than poly(sodium 4-styrene sulfonate). In addition, it was observed that montmorillonite contributes to retention capacity from the increase in distribution coefficients for loaded resins compared with unloaded resins.

Preparation and characterization of water‐soluble polymers and their utilization in chromium sorption

“…For this reason, the retention of P(ClAETA) is null for Cr(III). The literature shows similar results for P(NaSS) resins, which present low retentions at pH 1 but high retention at pH 3 and 5 . The same was observed in previous studies of interactions of water‐soluble P(NaSS) and metal ions …”

Poly(2-acrylamidoglycolic acid-co-2-acrylamide-2-methyl-1-propane sulfonic acid) and poly(2-acrylamidoglycolic acid-co-4-styrene sodium sulfonate): synthesis, characterization, and properties for use in the removal of Cd(II), Hg(II), Zn(II), and Pb(II)

“…Urbano et al studied the enhanced of mechanical properties of polymer-clay ion exchange resins with poly(sodium 4-styrene sulfonate) and poly(2-acrylamido glycolic acid), and the metal ion retention. The results showed high efficiency, reaching over 80 % after only 1 h of contact [20]. Rivas et al [14] studied the metal ion retention properties using functional resin poly(4-styrene sulfonate-co-4-vinylpyridine), they found at pH 5 the resin presented an affinity above 90 % for Cd(II), Pb(II), Cr(III), and Al(III), for Hg(II) the highest retention was achieved at pH 2.…”

Hydrogels based on alkylated chitosan and polyelectrolyte copolymers

“…The poly(HMPSA‐ co ‐SSNa) spectrum presents bands at 2926 (CC stretching), 1644 (CC), 1188 (CH, 1,4 substitution), and 1042 cm −1 (SO stretching). The poly(ClAPTA‐ co ‐SSNa) presents bands around 3430 (NH stretching), 3000 (CH stretching), and 1483 cm −1 (bending band of the quaternary ammonium groups [N + (CH 3 ) 3 ] . On the basis of these results, the structures of the copolymers are confirmed.…”