The Preparation of Calcium Carbonate Modified High Water-Absorbing Resin

Abstract:

The poly (sodium acrylate/acrylic acid) water-absorbing resin was prepared by aqueous solution polymerization with acrylic acid (AA) as the monomer, calcium carbonate as the modified additives, N, N-methylene double acrylamide (NMBA) as cross-linking agent, ammonium persulfate (APS)/sodium sulfite oxidation reduction type initiator. It was found that the adsorption performance of absorbent resin modified by calcium carbonate strengthened obviously. Orthogonal and single factor experiment were used to establish the optimum parameters related to the product preparation. The best process conditions on water-absorbing properties of the modified resin was obtained. Using 150mL acrylic acid as a benchmark, the result show the optimum process conditions: the reaction temperature is 55°C, the mass fraction of monomer is 20%, the neutralization degree is 45%, modified additive dosage is 10 g, the dosage of cross-linking agent is 0.1%, and the initiator dosage is 2.0%, respectively. After made under the optimum process conditions, the water-absorbing rate of the modified resin was 676.6 times the dry weight.

• Periodical: Advanced Materials Research (Volume 1035)
• Pages: 296-302
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1035.296
• Online since: October 2014
• Authors: Qi Shi*, Qing Luo Meng, Nong Wang
• Keywords: Absorbent Properties, Acrylic Acid, Calcium Carbonate, Liquid-Absorption Rate, Water-Absorbing Resin

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