纺织学报 ›› 2012, Vol. 33 ›› Issue (3): 9-13.

• 纤维材料 • 上一篇    下一篇

葡甘聚糖/凹凸棒土共混溶液的流变性质

 于金超, 彭志勤, 胡国樑, 梅云云, 俞洁洁   

  1. 浙江理工大学先进纺织材料与制备技术教育部重点实验室
  • 收稿日期:2011-04-08 修回日期:2011-07-07 出版日期:2012-03-15 发布日期:2012-03-06
  • 通讯作者: 胡国樑 E-mail:zisthugl@sina.com
  • 基金资助:

    校级

Rheological behavior of Konjac Glucomannan/Attapulgite blending solution

 YU  Jin-Chao, PENG  Zhi-Qin, HU  Guo-Liang, MEI  Yun-Yun, YU  Jie-Jie   

  • Received:2011-04-08 Revised:2011-07-07 Online:2012-03-15 Published:2012-03-06

摘要: 采用凹凸棒土(AT)对魔芋葡甘聚糖(KGM)进行共混改性,并通过动态流变测试研究了20℃时不同纳米AT添加量对共混溶液流变性质的影响。结果表明:AT的加入使得共混溶液的复数粘度、储能模量和损耗模量均比原溶液低。当AT含量较低时,在外力的作用下AT能够自由旋转,并且诱导KGM分子取向,复合溶液的似液体行为更为明显;当AT含量较高时,由于体积效应限制了KGM分子的运动,使共混溶液呈现出似固体行为;当AT与KGM的质量比为2%时,溶液中可能形成了局部的逾渗网络结构。随着AT含量的增多,共混溶液对频率的依赖性减小,溶液内部结构呈现出非均相的趋势愈加明显。

Abstract: Konjac glucomannan(KGM)was modified by blending with attapulgite (AT). The effect of different AT loadings on the rheological properties of the blend solutions at 20℃ has been investigated by dynamic rheological test. The results show that the complex viscosity, storage modulus as well as loss modulus of the blending solutions are lowered than those of pure KGM solution in most cases. The individual AT nano-rod can rotate freely, which results in the orientation of KGM molecules at low AT content and the more liquid-like behavior of the blend solutions; while AT at high content confines the motion of KGM molecules, leading to the solid-like behavior of the blend solutions due to the steric confinement effect. Besides, it has been found that local percolation network structure might be formed in the case of the 2% mass ratio of AT/KGM. With the increase of AT loading, the blend solutions are seemed to be less frequency dependent compared with pure KGM solution but more heterogeneous in internal structure.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!