Effect of the Ion Strengths in Different Salt Solutions on the Absorbencies of Poly(acrylic acid-co-acrylamide) Superabsorbent by Inverse Suspension Polymerization

Abstract:

The absorbencies of poly(acrylic acid-co-acrylamide) (PAAM) are measured for the ion strengths of the salt solutions using the self-made PAAM by inverse suspension polymerization. The effects of various salt solutions on the swelling properties were studied systemically, and the relationship between the absorbency (Q) of PAAM and the concentrations of different salt solutions(c) could be expressed as Q=kcⁿ. The absorbencies of PAAM decrease obviously with the ion strengths (less than 0.03mol/kg) and had no great change when the ion strengths were higher than 0.03mol/kg for the same solution systems. The absorbency decreased with an increase in charge of the metal cation. The absorbencies of the PAAM in the sodium solutions with different anion decreased with an increase of the ion strengths. However, the absorbencies increased with the increase in charge of the anionic group and were in order PO₄^3->CO₃^2->Cl^-.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 711-715
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.711
• Online since: July 2012
• Authors: Jian Jun Xie, Qing Xin Yao, Nian Zeng, Chu Ding
• Keywords: Absorbency, Inverse Suspension Polymerization, Poly(acrylic acid-co-acrylamide), Superabsorbent

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