物理化学学报 >> 1990, Vol. 6 >> Issue (04): 509-512.doi: 10.3866/PKU.WHXB19900423

研究简报 上一篇    

低分子物质在聚乙烯醇水凝胶中的扩散

王玉忠; 郑长义   

  1. 山东纺织工学院纺化系;四川大学化学系
  • 收稿日期:1989-05-08 修回日期:1989-11-18 发布日期:1990-08-15
  • 通讯作者: 王玉忠

Diffusion of Small Molecule Matters in Poly(Vinyl Alcohol)-Water Gels

Wang Yu-Zhong; Zheng Chang-Yi   

  1. Shandong College of Textile Engineering; Sichuan University
  • Received:1989-05-08 Revised:1989-11-18 Published:1990-08-15
  • Contact: Wang Yu-Zhong

Abstract: The diffusion of ethanol, urea, glucose and sucrose into gel beads which are prepared from the equeous solutions of poly(vinyl alcohol) (PVA) has been investi gated. The diffusion coefficients of those small molecule matters in gel beads have much to do with temperature and the free-water content and the pore size of the gels. The structure of gel beads, which determines the pore size of the gels, depends on the concentration of PVA gels, freezing time and preparation method of gel beads. The diffusion coefficients of the above mentioned matters in the gels increase with the rise of temperature, and do with their concentrations at given freezing time. The diffusion coefficient of sucrose in the gels decreases, but the diffusion coefficients of ethanol, urea and glucose increase, with the increase of freezing time at a given concentration.