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Water Sorption Behaviors of Novel Biohybrid Hydrogels as Effective Sorbents in Water-Solvent Binary Mixtures

Novel sorbent hydrogels containing acrylamide/sodium vinylsulfonate, 
carboxymethyl cellulose and zeolite were synthesized with free radical solution 
polymerization by using ammonium persulfate/N,N,N’,N’-tetramethylethyle-nediamine 
as redox initiating pair in presence of poly(ethylene glycol) diacrylate as 
crosslinker. It was to investigate the water uptake properties of series of the 
novel hydrogels, the semi IPNs and the hybrid/biohybrid composite hydrogel 
sorbents synthesized in this study. Water uptake studies were performed in 
water and in water-solvent (acetone, methanol and tetrahydrofuran) binary 
mixtures at 25°C, gravimetrically. Some swelling and 
diffusion parameters were calculated and discussed. It has been seen that the 
lower equilibrium swelling factor values in all solvent compositions in 
comparison with the equilibrium swelling factor values in water.