Hyperbranched polyglycerol/poly(acrylic acid) hydrogel for the efficient removal of methyl violet from aqueous solutions

Abstract

Hydrogels were synthesized from hyperbranched polyglycerol (HPG) and acrylic acid through free‐radical polymerization with HPG as the crosslinker. The HPG/poly(acrylic acid) (PAA) hydrogel could absorb cationic dyes in aqueous solutions because of the existence of a porous structure and the large numbers of hydroxyl and carboxylic groups. With methyl violet chosen as a model compound, the HPG/PAA hydrogel reached a maximum adsorption of 394.12 mg/g at a feed concentration of 1 g/L. The highest removal ratio of 98.33% was observed at a feed concentration of 50 mg/L. The effects of the pH, contact time, and feed concentration on the dye adsorption were investigated. The dye adsorption data fit well with the pseudo‐second‐order and Langmuir models. We believe that the HPG/PAA hydrogels could perform well in appropriate applications in the removal of cationic dyes from aqueous solutions because of their high adsorption capacity and environmental friendliness. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 42951.

Equilibrium and kinetics study of methyl violet adsorption by pineapple leaf fibers‐cl‐poly(acrylic acid‐co‐2‐dimethyl amino ethyl acrylate) hydrogel

“…Therefore, the electrostatic interaction attraction between the hydrogel (COO − and NH) and the dye molecules (N + ) enhances the removal efficiency of the dye molecules. Similar results are reported in literature for MV adsorption by the hydrogel 42–44 …”

Copolymer Based on Polyglycerol-Acrylate-Lactate as Potential Water Viscosifier and Surfactant for Enhanced Oil Recovery

“…Besides the characteristic peaks from polyglycerol, it is observed a defined peak at 1718 cm -1 related to the C=O stretching of carbonyl groups of the PRE AA. Furthermore, at 1456 and 1407 cm -1 are found the asymmetric and symmetric COOstretching, respectively, of the carboxylate anion [39]. Similarly to the copolymer mentioned above, it is observed the C=O stretching at 1750 cm -1 indicating the incorporation of PRE LA segments to the polyglycerol backbone [40].…”

Highly efficient antifouling property based on self‐generating hydrogel layer of polyacrylamide coatings

“…27 Figure 4(c) shows the TGA curves of C-1, C-2, C-3, and C-4. 27 Figure 4(c) shows the TGA curves of C-1, C-2, C-3, and C-4.…”

“…The thermal stabilities of synthesized resins were investigated by TGA, and the results were used to determine the actual content of each polymer in the resins. 27 Figure 4 The 81.82 wt % weight loss in the temperature range of 320-520 8C was increasingly significant because of the rupture of the main-chain backbone and the destruction of the crosslinked network. 28 The differential curve for C-2 indicated that the weight-loss temperature of C-2 at 245.7 8C was extended compared with those of C-1, C-3, and C-4, as well as much higher than those of other resins.…”