Reversible Polymer Hydrogels

摘要

Temperature sensitive hydrogels based on N-isopropyl acrylamide (NIPA) and acryloyl glucosamine (AG) were synthesized using ammonium persulfate (APS) as initiator, N,N,N',N' -tetramethylenediamene (TEMED) as activator, and N,N'-methylene bisacrylamide (BIS) as cross-linker. The hydrogels were characterized using FTIR spectral analysis to investigate the chemical composition of the hydrogels. Swelling studies of the gel in water at room temperature to relate the swelling characteristics to the chemical composition were conducted. Further, the critical swelling temperature of the gels was determined on the basis of absorbance of radiation by the gels. The gels were used in separating the water contaminants such as As+3,+5, Cr+3,+6, RDX and HMX from aqueous medium. The results of the preliminary study demonstrated that the gels are highly stable and capable of removing pollutants from water.