Preparation of Straw Superabsorbent Composite Material by Microwave Method

Abstract:

By microwave method, a superabsorbent function composite material was prepared by grafting sodium acrylate onto straw flour using potassium persalfate (K₂S₂O₈) and N, N'-methylene bis acrylamide as an initiator and crosslinker, respectively. The effect of various preparation conditions on its water absorbency was investigated. When the straw flour content was 6%, the acrylic acid content was 20.0g, the amount of initiator was 0.4%, the neutralization degree of monomer was 80%, the reaction temperature was 70°C and the amount of crosslinker was 0.05%, the materials absorbency was 1360 times in distilled water and 152 times in 0.9% salt-water at ambient temperature. It had also high water retention. The analyses of SEM indicate that sodium acrylate is grafted on the polysaccharides of straw flour.

• Periodical: Advanced Materials Research (Volume 873)
• Pages: 337-343
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.873.337
• Online since: December 2013
• Authors: Lian Wei Yang*, Rui Jie Wang
• Keywords: Characterization, Preparation, Straw, Superabsorbent Polymer

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