Abstract
ABSTRACT A novel bio-based crosslinker – epoxidized succinic acid (ESA)—was prepared from the condensation reaction of succinic acid with epichlorohydrin. The ESA was used as a surface-crosslinker to improve the low gel strength of itaconic acid-based superabsorbent polymers (SAPs). The surface-crosslinked SAP showed a significant improvement in absorbency under loads of up to 220%, and its storage modulus increased by ~ 12 times compared to that of an untreated SAP. The proper balance of absorption performance was optimal when the acetone:DW volume ratio of the surface-crosslinking solution was 8:2. The bio-based content of the optimal SAP was enhanced up to 59.7%.
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