物理化学学报 >> 1998, Vol. 14 >> Issue (09): 789-793.doi: 10.3866/PKU.WHXB19980905

研究论文 上一篇    下一篇

海藻酸钠在KCl水溶液中的粘度行为

张虎成, 郑洪河, 王键吉, 杨书廷, 张庆芝   

  1. 河南师范大学化学系，新乡 453002
  • 收稿日期:1997-11-17 修回日期:1998-01-25 发布日期:1998-09-15
  • 通讯作者: 张虎成

The Viscosity Behavior of Sodium Alginate in Aqueous KCl Solution

Zhang Hu-Cheng, Zheng Hong-He, Wang Jian-Ji, Yang Shu-Ting, Zhang Qing-Zhi   

  1. Department of Chemistry,Henan Normal University,Xinxiang 473002
  • Received:1997-11-17 Revised:1998-01-25 Published:1998-09-15
  • Contact: Zhang Hu-Cheng

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摘要：

通过测定海藻酸钠水溶液的特性粘数及在低高于强度的条件下其浓度与比浓粘度关系曲线上的峰值，系统地研究了KCl浓度在2×10（－5）－0.5mol•L（-1）范围内对海藻酸钠溶液粘度行为的影响．根据Odijk－Skolnick－Fixman理论和Rinaudo的处理方法，从理论上对海藻酸钠溶液的粘度行为进行了探讨．研究结果表明：聚电解质溶液的电粘滞效应可使用静电相关长度得到合理解释.

关键词: 海藻酸钠, 粘度, 聚电解质

Abstract:

The intrinsic viscosity is determined for sodium alginate sample, a peak in the curve of reduced viscosity vs sodium alginate concentration is observed when diluted with a fixed low ionic strength solution, and the measurements are carried out in aqueous KCl solutions of various ionic strengths. On the basis of this study on sodium alginate over the ionic strength range from2×10-5 mol L-1 to 0.5 mol•L- 1, it can conclude that the contribution of electroviscous effect to the polyelectrolyte solution viscosity may be explained by the electrostatic persistence length.

Key words: Sodium Alginate, Viscosity, Polyelectrolyte