Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (03): 210-215.doi: 10.3866/PKU.WHXB19990304

• ARTICLE • Previous Articles     Next Articles

Solute Diffusion in the Dynamic Network of Gel

Liu Hong-Bin, Ren Yan, Wang Yu-Xin, Wang Shi-Chang, An Ying-Li, Zuo Ju   

  1. Chemical Engineering Research Center,Tianjin University,Tianjin 300072|State Key Laboratory of Functional Polymer Materials for Adsorption and Separation,Insitute of Polymer Chemistry,Nankai University,Tianjin 300071
  • Received:1998-06-04 Revised:1998-07-09 Published:1999-03-15
  • Contact: Wang Yu-Xin


 A study was carried out both theoretically and experimentally on the solute diffusion in gel networks. The emphasis of this study was on the effect of network fluctuation. A model of diffusion was established based on the theory of dynamic disordered hopping, which was originally developed to describe the conduction of charged particles in polyelectrolyte. Temperature sensitive poly(n-isopropylacrylamide) gels were prepared and methyl blue was chosen as a solute for the diffusion experiment. Laser light scattering spectroscopy was used to study the dynamic behaviors of the gel network. Theoretical predictions agree qualitatively with the experimental results.

Key words: Gel, Density fluctuation, Percolation theory, Dynamic disordered hopping, Diffusion