Effect of fiber concentration and axial ratio on the rheological properties of cellulose fiber suspensions

Daisuke Tatsumi, Satoshi Ishioka, Takayoshi Matsumoto

研究成果: ジャーナルへの寄稿記事

90 引用 (Scopus)

抄録

The steady flow and the dynamic viscoelastic properties of cellulose fiber suspensions were investigated as functions of the suspension concentration and the fiber shape using a parallel-plate type rheometer. Various concentrations of the suspensions were made from various types of cellulose fibers, i.e., microcrystalline cellulose, bacterial cellulose, and fibrillated cellulose fibers. All the suspensions showed non-Newtonian flow even at very low concentrations. The flow property of each suspension showed a plateau of the shear stress, i.e., the yield stress, over a critical concentration. The critical concentration obtained from the experiment agreed well with the value theoretically calculated from the axial ratio of the fibers. The dynamic moduli of the suspensions were almost independent of the angular frequency, and they increased with the fiber concentration. The dynamic storage moduli increased in proportion to the 9/4th power of the fiber concentration. This power of 9/4 is coincident with that theoretically required for polymer gels. This fact suggests that the rigidity of the suspensions has appeared by the same mechanism from the order of cellulose fibers to microcrystalline cellulose fibers, and even to polymer molecules.

元の言語英語
ページ(範囲)27-32
ページ数6
ジャーナルNihon Reoroji Gakkaishi
30
発行部数1
DOI
出版物ステータス出版済み - 1 1 2002

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cellulose
Cellulose
Suspensions
fibers
Fibers
Polymers
Non Newtonian flow
rheometers
Rheometers
steady flow
polymers
Steady flow
parallel plates
rigidity
Rigidity
shear stress
Yield stress
Shear stress
low concentrations
plateaus

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Effect of fiber concentration and axial ratio on the rheological properties of cellulose fiber suspensions. / Tatsumi, Daisuke; Ishioka, Satoshi; Matsumoto, Takayoshi.

:: Nihon Reoroji Gakkaishi, 巻 30, 番号 1, 01.01.2002, p. 27-32.

研究成果: ジャーナルへの寄稿記事

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