pH-sensitive Itaconic acid based polymeric hydrogels for dye removal applications

• Published in: Ecotoxicology and environmental safety 2016-12, Vol.134 (Pt 2), p.427-432
• Main Authors: Sakthivel, M., Franklin, D.S., Guhanathan, S.
• Format: Article
• Language: English
• Subjects: Acrylates - chemistry; Cations; Coloring Agents - chemistry; Ethylene glycol; Hydrogels; Hydrogels - chemical synthesis; Hydrogels - chemistry; Hydrogen-Ion Concentration; Itaconic acid; Methylene Blue - chemistry; Polymers - chemistry; Potassium Compounds - chemistry; Spectroscopy, Fourier Transform Infrared; Succinates - chemistry; Sulfates - chemistry; Swelling equilibrium; Temperature; Thermal stability; Water Pollutants, Chemical - chemistry; Water Purification - methods
• ISSN: 0147-6513; 1090-2414
• DOI: 10.1016/j.ecoenv.2015.11.004

A series of Itaconic Acid (IA) based pH-sensitive polymeric hydrogels were synthesized by condensation polymerization of Itaconic Acid (IA) with Ethylene Glycol (EG) in the presence of an acid medium resulted into pre-polymer. Further, pre-polymer were co-polymerized with Acrylic Acid (AA) through free radical polymerization using Potassium persulphate (KPS). The structural and surface morphological characterizations of the synthesized hydrogels were studied using FT-IR spectroscopy and Scanning Electron Microscope (SEM) respectively. The swelling and swelling equilibrium were performed at varies pH (4.0–10.0). Further, the effects of IA, EG and AA on swelling properties have also been investigated. Thermal stability of synthesized hydrogels have been investigated by TGA, DTA and DSC. The synthesized hydrogels have shown good ability to uptake a Cationic dye. The Methylene blue has been chosen as a model cationic dye. The results of dye removal using IA hydrogels found to have excellent dye removal capacity. Such kind of IA based hydrogels may be recommended for eco-friendly environmental application. viz., removal of dyes and metal ions and sewage water treatment, purification of water etc. [Display omitted] •Itaconic acid hydrogels with tuned pH-sensitivity via eco-friendly green approach.•Synthesized IA polymeric hydrogels have shown excellent dye removing capacity.•Eco-friendly hydrogels.