Study on Preparation and Performance of a High Water Absorbent Resin
In order to improve the absorption rate and pressure absorption rate of high water absorbent resin,taking acrylic acid as the polymerization monomer,trimethylolpropane triacrylate as the crosslinking agent,potassium persulfate and sodium bisulfite as initiators,sodium dodecyl sulfate as an additive,and butanediol diglycidyl ether as the surface treatment solution,high water absorbent resin was synthesized through aqueous solution polymerization.The particle morphology of high water absorbent resin was characterized by electron microscopy,and the effects of monomer dosage,crosslinking agent dosage,initiator dosage,additive dosage,and surface treatment solution dosage on the absorption rate and pressure absorption rate of high water absorbent resin were studied.The results showed that the optimal synthesis conditions were as follows:acrylic acid 300 g,crosslinking agent 3.6 g,initiator 0.9 g,additive 0.2 g,and surface treatment solution 1.5 g.Under these conditions,the prepared superabsorbent resin had a fast absorption rate and high pressure absorption rate,with an absorption rate of 8 s and a pressure absorption rate of 32 g·g-1.
High water absorbent resinAcrylic acidAbsorption ratePressure absorption rate
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