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1993 Fiscal Year Final Research Report Summary

Developments of Super Water-Absorbents Derived from Cellulose and Lignocellulose Grant Copolymers.

Research Project

Project/Area Number 03556026
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 林産学
Research InstitutionKYUSHU

Principal Investigator

SAKATA Isao  Kyushu University, Faculty of Agriculture, Professor Emeritus., 農学部, 名誉教授 (10038169)

Co-Investigator(Kenkyū-buntansha) HONGU Tatsuya  Toho Rayon Co., LTD., Technical Adviser., 技術顧問
MIYATA Namiko  Nakamura Gakuen College, Professor., 教授 (30069778)
MORITA Mitsuhiro  Kyushu University, Faculty of Agriculture, Associate Professor., 農学部, 助教授 (30038301)
Project Period (FY) 1991 – 1993
KeywordsSuper water-absorbent / Cellulose graft copolymer / Hydrogel / Polyacrylamide / Lignin graft copolymer / Hydrolysis / Swelling mechanism / Porous structure
Research Abstract

It was the aim of this project to develop high-performance super water-absorbents derived from cellulose and lignocellulose graft copolymers.
The results were obtained as follows ;
1. The graft copolymers of cellulose and hydroxyethylcellulose containing partially hydrolyzed polyacrylamide absorbed deionized water and a physiological saline solution up to 1000-3000 g/g and 100-300 g/g of absorbent, respectively. These values were 3-5 times greater than those of commercially available super water-absorbents.
2. The porous structures of the highly swollen gydrogels of cellulose-acrylamide graft copolymers were studied by the solute exclusion technique. For these hydrogels, the cumulative volume of pores up to 560A in pore width was between 450 and 850 mL/g, and was between 20 and 30% of the total volume.
3. The absorbency of the cellulose garft copolymers decreased with an increase in the concentration of NaCl in external solution. However, the swelling behavior of the samples did not quantitatively follow flory's theory.
4. The graft copolymers of acrylamide onto woody fiber containing lignin was readily prepared by the redox-initiated reaction between the peroxide groups of substrates preoxidized with peracetic acid and titanous ion.
5. Lignin(sodium lignosulfonate) - partially hydrolyzed methylacrylate graft copolymers have been expected to have little effects of salt concentration and pH on the absorbencies.

  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] N.Miyata & I.Sakata: "Synthesis and Properties of Hydroxyethylcellulose Graft Copolymers as Super Water-Absorbents." Sen-i Gakkaishi. 47. 95-101 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yoshinobu,M.Morita & I.Sakata: "Water and Moisture Sorptive Properties of Some Cellulosic Graft Copolymers." Sen-i Gakkaishi. 47. 102-108 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Miyata & I.Sakata: "Microscopic Structures and Some Properties of Super Water-Absorbents of Hydroxyethylcellulose Graft Copolymers." Sen-i Gakkaishi. 47. 428-433 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.-B.Park,M.Morita & I.Sakata: "Synthesis and Properties of Lignocellulosic Graft Copolymers as Water and Moisture Absorbents." Polymer Technology and Industry (Korea). 1. 126-128 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 朴相範,森田光博,坂田功: "リグノセルロース-アクリルアミド系グラフトポリマーからの吸水・吸湿性材料" 木材学会誌. 37. 1056-1062 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yoshinobu,M.Morita,M.Higuchi & I.Sakata: "Porous Structure and Rheological Properties of Hydrogels of Highly Water-Absorptive Cellulose Graft Copolymer." Journal of Applied Polymer Science. 45. 805-812 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yoshinobu,M.Morita,M.Higuchi & I.Sakata: "Effect of Neutral Salt and pH on the Swelling of Cellulosic Super Water-Absorbent." Sen-i Gakkaishi. 49. 225-231 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yoshinobu,M.Morita,M.Higuchi & I.Sakata: "Morphological Study of Hydrogels of Cellulosic Super Water-Absorbents by CRYO-SEM Observation." J.Appl.Polym.Sci.(in press). (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Miyata,M.Yokoyama,& I.Sakata: "Properties of Highly Water-absorptive Hydroethyl-cellulose Graft Copolymers - Viscoelasticity and Moisture Sorption -." J.Appl.Polym.Sci.(in press). (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yoshinobu,M.Morita,M.Higuchi & I.Sakata: "Effect of Molecular Chain Length of Cellulose Trunk Polymer on the Swelling Behavior of Cellulose Graft Copolymer." Sen-i Gakkaishi. (in press). (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Miyata & I.Sakata: "“Cellulosics:Chemical,Biochemical and Material Aspects",(J.F.Kennedy et al Eds.)" Ellis Horwood,Chichester,U.K., 498 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Miyata and I.Sakata: "Synthesis and Properties of Hydroxyethylcellulose Graft Copolymers as Super Water-Absorbents." Sei-i Gakkaishi. 47(2). 95-101 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yoshinobu, M.Morita and I.Sakata: "Water and Moisture Sorptive Properties of Some Cellulosic Graft Copolymers." Sen-i Gakkaishi. 47(2). 102-108 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Miyata and I.Sakata: "Microscopic Structures and Some Properties of Super Water-Absorbents of Hydroxyethylcellulose Graft Copolymers." Sen-i Gakkaishi. 47(8). 428-433 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.-B.Park, M.Morita and I.Sakata: "Synthesis and Properties of Lignocellulosic Graft Copolymers as Waster and Moisture Absorbents." Polymer Technology and Industry (Korea). 1(1). 126-128 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.-B.Park, Morita and I.Sakata: "Water and Moisture Absorbents from Lignocellulose-Acrylamide Graft Copolymers." Mokuzai Gakkaishi. 37(11). 1056-1062 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yoshinobu, M.Morita and I.Sakata: "Porous Structure and Rheological Properties of Hydrogels of Highly Water-Absorptive Cellulose Graft Copolymer." J.Appl.Polymer Sci.45. 805-812 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yoshinobu, M.Morita, M.Higuchi and I.Sakata: "Effect of Neutral Salt and pH on the Swelling of Cellulosic Super Water-Absorbent" Sen-i Gakkaishi. 49(5). 225-231 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Miyata and I.Sakata: "Hydroxyethylcellulose Graft Copolymers and Super Water-absorbetns : In "Cellulosics : Chemical, Biochemical and Material Aspects", J.F.Kennedy, G.O.Phillips and P.A.Williams, Eds." Ellis Horwood, Chichester, U.K.397-402 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yoshinobu, M.Morita, M.Higuchi and I.Sakata: "Morphological Study of Hydrogels of Cellulosic Super Water-Absorbents by CRYO-SEM Observation." J.Appl.Polym.Sci.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Miyata, M.Yokoyama and I.Sakata: "Properties of Highly Water-absorptive Hydroethyl-cellulose Graft Copolymers -Viscoelasticity and Moisture Sorption-." J.Appl.Polym.Sci.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yoshinobu, M.Morita, M.Higuchi and I.Sakata: "Effect of Molecular Chain Length of Cellulose Trunk Polymer on the Swelling Behavior of Cellulose Graft Copolymer." Sen-i Gakkaishi. (in press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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