Absorption Capability Comparison of Two Kinds of Super Absorbent Resins from Carboxymethyl Cellulose

The two kinds of super absorbent resins from carboxymethyl cellulose were synthesized with the potassium persulphate and methylenebisacrylamide as initiator and cross linker respectively by radical polymerization in aqueous solution. The structures of the two resins were characterized with Fourier transform infrared spectroscopy FTIR, scanning electron miscroscopy (SEM), and environment scanning electron miscroscopy (ESEM), the results indicate that the fibriform of the carboxymethyl cellulose (CMC) is disappeared and the crosslink networks in copolymer of carboxymethyl cellulose-graft-poly acrylic acid (CMC-g-PAA) are denser than that of copolymer of carboxymethyl cellulose-graft-poly (acrylic acid-co-N-vinyl Pyrrolidone) (CMC-g-PAA-co-PVP). The comparison between the two resins in absorption capacities is that CMC-g-PAA is better in the water-keep capability being heated, while CMC-g-PAA-co-PVP is better in the water absorbency and salt resistance.