Journal
JOURNAL OF WOOD SCIENCE
Volume 47, Issue 5, Pages 394-399Publisher
SPRINGER-VERLAG TOKYO
DOI: 10.1007/BF00766792
Keywords
cellulose; carboxymethyl cellulose; super water absorbent; crosslinking; water retention value
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This paper describes the synthesis of high-retention water absorbents from kraft pulp and examination of their properties. A bleached kraft pulp from mixed hardwoods (LBKP) was carboxymethylated, then crosslinked with polyethylene glycol diglycidyl ethers (PEGDGE) with different degrees of polymerization under different conditions. A crosslinking agent with longer chain length might be advantageous for preparing a water absorbent with high water retention, and water retention could be improved at lower molar ratio of the crosslinking agent to the glucose unit. Isolation of carboxymethylated LBKP before crosslinking was advantageous for higher water absorbence. A water absorbent with a water retention value of as high as 500 times its weight was obtained.
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