Journal of Wood Science

, Volume 47, Issue 5, pp 394–399 | Cite as

Development of high-retention water absorbent from cellulosic materials: water absorbent from bleached kraft pulp



This paper describes the synthesis of highretention 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.

Key words

Cellulose Carboxymethyl cellulose Super water absorbent Crosslinking Water retention value 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Weaver MO, Montgomery RR, Miller LD, Sohns VE, Fanta GF, Doane WM (1977) A practical process for the preparation of super slurper, a starch-based polymer with a large capacity to absorb water. Starke 29:413–422CrossRefGoogle Scholar
  2. 2.
    Nukushina K (1980) Super absorbent (in Japanese). Yuki Gosei Kagaku 38:546–554Google Scholar
  3. 3.
    Miyata N, Sakata I (1991) Synthesis and properties of hydroxyethylcellulose graft copolymers as super water-absorbents. Sen'i Gakkaishi 47:95–101Google Scholar
  4. 4.
    Motohashi T (1984) High water-absorbent resin (in Japanese). Kobunshi Kako 33:452–457Google Scholar
  5. 5.
    Lepoutre P, Hui SH, Robertson AA (1976) Some properties of polyelectrolyte-grafted cellulose. J Macromol Sci Chem Part A 10:681–693CrossRefGoogle Scholar
  6. 6.
    Tsukamoto H (1996) Introduction of the superabsorbent materials (in Japanese). J Jpn TAPPI 48(2):28–34Google Scholar
  7. 7.
    Arai K, Goda H (1993) Crosslinked sodium cellulose sulfate as a highly absorbent material (in Japanese). Sen'i Gakkaishi 49:482–485Google Scholar
  8. 8.
    Lepoutre P, Hui SH, Robertson AA (1973) The water absorbency of hydrolyzed polyacrylonitrile-graft cellulose fibers. J Appl Polym Sci 17:3143–3156CrossRefGoogle Scholar
  9. 9.
    Williams JL, Stannett VT (1979) Highly water-absorptive cellulose by postdecrystallization. J Appl Polym Sci 23:1265–1268CrossRefGoogle Scholar
  10. 10.
    Vitta SB, Stahel EP, Stannett VT (1986) The preparation and properties of acrylic and methacrylic acid grafted cellulose prepared by ceric ion initiation. II. Water retention properties. J Appl Polym Sci 32:5799–5810CrossRefGoogle Scholar
  11. 11.
    Yoshinobu M, Morita M, Sakata I (1992) Porous structure and rheological properties of hydrogels of highly water absorptive cellulose graft copolymers. J Appl Polym Sci 45:805–812CrossRefGoogle Scholar
  12. 12.
    Yoshinobu M, Morita M, Sakata I (1991) Water and moisture sorptive properties of some cellulosic graft copolymers. Sen'i Gakkaishi 47:102–108Google Scholar
  13. 13.
    Kuwabara S, Kubota H (1996) Water-absorbing characteristics of acrylic acid-grafted carboxmethylcellulose synthesized by photo-grafting. J Appl Polym Sci 60:1965–1970CrossRefGoogle Scholar
  14. 14.
    Green JW (1963) O-carboxymethylcellulose. In: Whistler RL (ed) Methods in carbohydrate chemistry, vol 3. Academic Press, San Diego, pp 322–327Google Scholar
  15. 15.
    Klemm D, Philipp B, Heinze T, Wagenknecht W (1998) Carboxymethylcellulose, heterogeneous synthesis in isopropanol/water. In: Comprehensive cellulose chemistry, vol 2. Wiley-VCH, Weinheim, pp 353–354Google Scholar
  16. 16.
    Ho FFL, Klosiewicz DW (1980) Proton nuclear magnetic resonance spectrometry for determination of substituents and their distribution in carboxymethylcellulose. Anal Chem 52:913–916CrossRefGoogle Scholar
  17. 17.
    Bach Tuyet LT, Iiyama K, Nakano J (1985) Preparation of car-boxymethylcellulose from refiner mechanical pulp. III. Degree of substitution and distribution in carboxmethylcellulose. Mokuzai Gakkaishi 31:8–13Google Scholar
  18. 18.
    Bach Tuyet LT, Iiyama K, Nakano J (1985) Preparation of carboxymethylcellulose from refiner mechanical pulp. IV. Analyses of carboxymethylated polysaccharides by the use of1H-NMR. Mokuzai Gakkaishi 31:14–19Google Scholar
  19. 19.
    Scallan AM, Carles JE (1972) The correlation of the water retention value with the fibre saturation point. Svensk Papperstidn 75:699–703Google Scholar
  20. 20.
    Bach Tuyet LT (1983) Studies on the carboxymethylation of refiner mechanical pulp (in Japanese). Doctoral thesis, University of Tokyo, p 2Google Scholar

Copyright information

© The Japan Wood Research Society 2001

Authors and Affiliations

  1. 1.Laboratory of Wood Chemistry, Department of Biomaterial Sciences, Graduate School of Agricultural and Life SciencesThe University of TokyoTokyoJapan

Personalised recommendations