Solvent effects on sol-gel transition of sodium alginate solutions

Honghe Zheng, Qingzhi Zhang, Jianji Wang, Zhengyu Wang, Konno Mikio, Saito Shozaburo

Research output: Contribution to journalArticlepeer-review

Abstract

The cooperation of solute and solvent is taken as the gelation condition. The three dimensional percolation of blobs is taken as the gelation model. Phase transition of polyelectrolyte solution is then considered as a process of the formation and the percolation of blobs. By the study of the gelation of different concentration of alginate solutions induced by calcium cation, the nature of sol-gel transition has been suggested. Critical exponent of relative viscosity near the gelation point was determined as κ=0.90∼0.97. A power-law relation was confirmed between the gelation point ∫c and alginate concentration c. In addition, the correct range of application of the power-law relation of relative viscosity near gelation point, ηrel ∝ (∫c - ∫), has also been defined.

Original languageEnglish
Pages (from-to)604-608
Number of pages5
JournalActa Physico - Chimica Sinica
Volume12
Issue number7
Publication statusPublished - 1996

Keywords

  • Sodium alginate
  • Sol-gel transition
  • Solvent effects
  • Viscosity

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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