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摘要
The aim of this study was to investigate the equilibrium swelling and uranyl ion sorption properties of chemically crosslinked copolymeric hydrogels as biopotential sorbent consisting of acrylamide (AAm), sodium acrylate (SA), gelatin (GEL) and poly(ethylene glycol) (PEG). Semi-interpenetrating polymer network (semi IPNs) hydrogel, composed of AAm with SA as co-monomer, with PEG and GEL and a multifunctional crosslinker such as poly(ethylene glycol) diacrylate (PEGDA) was prepared by free radical solution polymerization by using ammonium persulphate (APS)/N,N,N',N'-t0etramethylethylenediamine (TEMED) as redox initiating pair. Swelling experiments were performed in water at 25 degrees C, gravimetrically. The hydrogels showed enormous swelling in water and displayed swelling characteristics that were highly depended on the chemical composition of the hydrogels. For characterization, FT-W, thermogravimetric analysis (TG and DTG) and surface morphology (SEM) studies have been realized. FTIR spectroscopy was used to identify the presence of different repeating units in the semi IPNs. Some swelling and diffusion characteristics were calculated for different semi IPNs and hydrogels prepared under various formulations. For sorption studies, uranyl ion into the hydrogels was studied by batch sorption technique at 25 degrees C. Sorption capacity, removal effiency and partition coefficient of the hydrogels was investigated. Swelling and uranyl ion sorption properties of AAm/SA, AAm/GEL/SA, AAm/PEG/SA and AAm/GEL/PEG/SA hydrogel systems were investigated as a function of chemical composition of the hydrogels.
- 出版日期2015-10
