Amylopectin grafted with poly (acrylic acid): Development and application of a high performance flocculant

Gum ghatti and poly(acrylamide-co-acrylic acid) based biodegradable hydrogel-evaluation of the flocculation and adsorption properties

“…Hydrogel polymers are mostly characterized by their ability to swell in water, therefore, the swelling capacity of the Gg-cl-P(AAMco-AA) hydrogel polymer was examined in double distilled water at different time intervals (4,8,12,16,20 and 24 h), varied temperatures (30, 40, 50, 60 and 70 C) and pH (3.0e13.0). For swelling experiments the same procedure was followed as described under Section 2.2 and the P s was calculated by using Eq.…”

Novel pathway to produce high molecular weight kraft lignin–acrylic acid polymers in acidic suspension systems

“…It was well known that the lower the dosage of the initiator, the fewer the radicals (graing cites) would form on lignin, which would result in a polymer with a longer chain. 48,49 The polymerization of lignin and AA can occur under two possibilities (i) a small number of long PAA segment attached to lignin in nal KL-AA polymer or (ii) a large number of short PAA segment attached to lignin in nal KL-AA polymer. In the former case, the hydrodynamic diameter of the polymer would increase due to the presence of long PAA segment on lignin.…”

“…In another report on the polymerization of amylopectin and AA, the hydrogen and oxygen contents of amylopectin were increased from 6.15% and 46.86% to 7.25% and 54.27%, respectively, but its carbon content decreased from 46.99% to 38.48%. 48 1 H-NMR analysis. The 1 H-NMR spectra of KL and KL-AA polymer are shown in Fig.…”

Phosphorylated polysaccharide derivatives as efficient separation agents for zinc and ferric oxides particles from water

“…), cationic polyelectrolytes are more frequently used in the (solid/liquid and liquid/liquid) separation processes [1][2][3][4][5][6][7][8][9][10][11][12][13]. As regards the anionic polyelectrolytes, those carrying carboxylic groups are mostly reported as flocculants [14][15][16][17][18]. By comparison, few polyanions carrying other functional groups than the carboxylic one, such as arsonic [19], phosphate [20,21] were used for pollutants removal, especially kaolin.…”