Synthesis of Anti-Salt Hydroxypropyl Methylcellulose-g-polyacrylamide/Laponite RD Nanocomposite Hydrogel and Its Application to Remove Cationic Dye

摘要

Nanocomposite hydrogels were synthesized from grafting of acrylamide onto hydroxypropyl methylceilulose using methylenebi-sacrylamide cross-linker and laponite RD nanoclay. An unusual swelling was observed in CaCl2 solutions. The structure of nanocom-posites was characterized by XRD, SEM, FTIR, and TEM techniques. The nanocomposite hydrogels were evaluated to remove crystal violet dye from water. The investigation on the adsorption capacity and rate of dye onto nanocomposite hydrogels as a function of laponite RD content revealed that the both adsorption capacity and rate is enhanced as the nanoclay content is increased in nanocomposite composition. The experimental adsorption data were analyzed according to kinetic and isotherm models.