アルギン酸系高吸水性樹脂の合成と性質

概要

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Synthesis of superabsorbents from sodium alginate was investigated using three kinds of crosslinker, CaCl_2, EGE, and GA. Among them, GA ws the most suitable to attain high absorbency, reaching ca 450 g/g in pure water after 72h treatment. This value is somewhat larger than that of conventinal crosslinked sodium scryate, ca 300g/g. On the contrary, superabsorbents crosslinked by CaCl_2 and EGE absorbed much less pure water, their absorbency was sround 140 g/g after 24h treatment, and gradually decreased probably because of partial scission of crosslinking. Absorbency in 0.9% aqueous solution of sodium alginate crosslinked by GA was ca 60 g/g, which is comparable to that of the conventional superabsorbent. This indicates that superabsorbent in the present study suffers more severe effects from NaCl concentration than the convenional superabsorbent. Further, superabsorbents of the present study showed moderate biodegradability during 14days BOD test.
福岡女子大学の論文
2005-03-04