Chinese Journal of Applied Chemistry

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Water Absorbency Performance of Three Kinds of Polyacrylate Superabsorbent Polymer

ZHU Zheng, ZHAO Yu*, ZHANG Dongzhen, WANG Yang, BI Caifeng   

  1. (Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,
    College of Chemical Engineering,Ocean University of China,Qingdao 266100,China)
  • Received:2012-12-12 Revised:2013-03-21 Published:2013-11-10 Online:2013-11-10
  • Contact: Zhao Yu

Abstract: Three polyacrylate superabsorbent polymers: sodium-polyacrylate(PAA), poly(acrylic acid-co-acrylamide)(P(AA/AM)) and poly(acrylate acid-co-maleic acid)(P(AA/MA)) were synthesized by inverse suspension polymerization(ISP). Systematic tests and comparison were taken at water absorption, water retention, weather resistance and electrolyte resistance of the product. The results show that P(AA/MA) possesses the best water absorption performance with an absorbency for distilled water of 3578.4 g/g in 10 min. The three polymers all have good quality of water retention within a range of temperature and pressure, with P(AA/MA) showing the best in this performance. The three polymers all can keep their water absorption in different temperature storage, and P(AA/MA) has excellent quality toward electrolyte resistance, with an absorbency for normal saline of 107.2 g/g. Overall, the comparisons show that the comprehensive performance of P(AA/MA) is the best.

Key words: superabsorbent polymer, polyacrylic acid, inverse suspension polymerization, water retention, water absorbency

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