Citation:
TIAN Da-Ting. Effects of Aqueous Salt Solutions on the Absorbency of Superabsorbents Based on Poly(acrylic acid-co-acrylamide)[J]. Chinese Journal of Applied Chemistry,
;2001, 18(12): 1007-1008.
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Effects of aqueous salt solutions on the absorbency of superabsorbents synthesized by inverse suspension copolymerization of acrylic acid with acrylamide were studied. The results showed that the water absorbency of superabsorbents in the salt solutions decreased with increase in the ionic strength of the salt. For the same ionic strength of chloride salt solutions, the water absorbency had the following tendency: Na+> Ca2+> Fe3+,Li+> Na+> K+, and Mg2+> Ca2+> Ba2+. The influences of anion valency of salts with a common cationic ion(Na+) on the water absorbency were the order of mononalent< divalent< trivalent anions.
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