Effective Enhancement of Water Absorbency of Itaconic Acid Based-Superabsorbent Polymer via Tunable Surface-Crosslinking

被引：20
作者：
Kwon, Yong-Rok [1 ,2 ]
Kim, Jung-Soo [1 ]
Kim, Dong-Hyun [1 ]
机构：
[1] Korea Inst Ind Technol KITECH, Mat & Component Convergence R&D Dept, Ansansi 15588, South Korea
[2] Hanyang Univ, Dept Mat Chem Engn, Ansansi 15588, South Korea
来源：
POLYMERS | 2021年 / 13卷 / 16期
关键词：
superabsorbent polymer; surface crosslinking; absorbency under load; centrifuge retention capacity; itaconic acid; SWELLING BEHAVIOR; COPOLYMERIZATION; COMPOSITE; HYDROGEL;
D O I：
10.3390/polym13162782
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A superabsorbent polymer (SAP) was synthesized by copolymerizing itaconic acid and vinyl sulfonic acid. The typically low absorbency of itaconic acid-based SAPs under mechanical loads was improved by introducing surface crosslinking. Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the synthesis and surface-crosslinking reactions in the SAP. Various conditions for surface-crosslinking reactions, such as the surface-crosslinking solution, content of surface-crosslinking agent, and reaction temperature, were explored and correlated with the gel strength and absorption characteristics of the resulting SAP particles. The distilled water content in the surface-crosslinking solution strongly influenced the absorption capacity of the SAP, but this sensitivity decreased when acetone was used as a co-solvent. Itaconic acid-based SAP that was crosslinked under optimal conditions exhibited centrifuge retention capacity and absorbency under a load of 31.1 and 20.2, respectively.
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页数：15
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