不同离子对保水剂吸水倍率影响的比较研究

Effects of different chemical ions and concentration on the water absorption rate of SAP were studied by determining the water absorption ability of five kind of SAPs to different concentration solutions of anions and cations, such as Na+、Mg2+、Fe3+，Cl-、SO42-、H2PO4- in the experiment. The results showed that the order of water absorption rate is Boya agriculture forest> SNJ-01> Wote> Boya black gold >6F22B in deionized water. With the anions and cations solutions concentration, the water absorption rate of five kind of SAPs had an obvious decreasing trend , and the change of the water absorption rate slowly down. The effect order of cations on the water absorption rate of five SAPs were Fe3+> Mg2+> Na+. For anions, the effects of H2PO4- on the water absorption rate of Boya black gold, Wote, 6F22B and SNJ-01 were largest in 0.001 mol/L concentration. The effects order of anions on the water absorption rate of Boya black gold in 0.005mol/L concentration and Boya agriculture forest in 0.010mol/L concentration were H2PO4-> SO42-> Cl-. The effects of SO42-on the water absorption rate of SAP were largest in other concentration.