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J4 ›› 2010, Vol. 45 ›› Issue (3): 15-18.

• 论文 • 上一篇    下一篇

低浓度白芨葡甘聚糖溶液的流变性研究

张洁,张卫明,史劲松,孙达峰,朱昌玲   

  1. 南京野生植物综合利用研究院, 江苏 南京 210042
  • 收稿日期:2009-09-22 出版日期:2010-03-16 发布日期:2010-04-02
  • 作者简介:张洁(1978-),女,助理研究员,博士,研究方向为植物资源开发利用.Email:zj.nicuw@gmail.com
  • 基金资助:

    国家高技术研究发展计划资助项目(2007AA100401);国家十一五支撑计划课题资助项目(2006BAD06B05)

Rheological properties of Blettila striata polysaccharide solutions

 ZHANG Jie, ZHANG Wei-Ming, SHI Jin-Song, SUN Da-Feng, ZHU Chang-Ling   

  1. Nanjing Institute for Comprehensive Utilization of Wild Plant,Nanjing 210042,Jiangsu, China
  • Received:2009-09-22 Online:2010-03-16 Published:2010-04-02

摘要:

研究了低浓度白芨葡甘聚糖(BSG)溶液的流变性与多糖浓度、外加电解质浓度、pH值及温度等的相关性。结果表明,BSG水溶液在2~16g·L-1时是假塑性流体。在低剪切速率下(γ<1s-1),溶液的表观黏度η迅速降低;剪切速率增大(γ>1s-1),溶液的η达到稳定(ηs)。在高剪切速率下溶液的ηs随浓度的增加而增加。向溶液中加入电解质,或者改变pH值,都不会影响ηs。对质量浓度为16g·L-1的BSG溶液,升高温度,η降低,η与温度的关系符合Arrhenius方程。

关键词: 白芨;葡甘聚糖;流变性;黏度

Abstract:

The effect of polysaccharide concentration, electrolyte concentration, pH value and temperature (T) on the rheological behaviors of Blettila striata polysaccharide solutions was studied. The solutions of polysaccharide concentration between 2 and 16 g·L-1 were pseudoplastic fluids. The apparent viscosity (η) of solutions decreased with increasing shear rate  (γ)in the range of γ<1s-1; while η became constant  (ηs)  for γ>1s-1. ηs rose with polysaccharide concentration, while salt concentration and pH had nothing to do with ηs. ηof solution at 16 g·L-1 lowered with rising T. The relationship between η and T conformed to the Arrhenius equation.

Key words: Blettila striata;polysaccharide;rheology;viscous

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