Effects of surface crosslinking on properties of super absorbent polymer
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TQ325.7

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    Abstract:

    Super absorbent polymer (SAP) was synthesized by aqueous solution polymerization. Then SAP was post-processed with a mixture of aluminum sulfate, glycerol and ethylene glycol diglycidyl ether. The influences of the amount of different surface crosslinking agents, surface crosslinking temperature and dosage of surface crosslinking solution on the performance of SAP were investigated. SAP was also characterized by FIIR and SEM. The results showed that, the absorbency capacities increased with the rising amount of aluminum sulfate while AUL decreased. Oppositely, the absorbency capacities decreased with the increasing dosage of ethylene glycol diglycidyl ether and surface crosslinking temperature while AUL increased. The maximum absorbency capacities for deionized water and saline water were 685g/g and 79g/g respectively when the mass fraction of glycerol was 9%, and AUL reached its maximum when the mass fraction of glycerol got to 12.7%. When the amount of surface crosslinking solution was 7.7g, the combination properties of SAP were the best.

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History
  • Received:June 03,2013
  • Revised:July 08,2013
  • Adopted:July 15,2013
  • Online: October 30,2013
  • Published:
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