中华医学超声杂志

应用化学 ›› 1995, Vol. 0 ›› Issue (3): 32-35.

• 研究论文 • 上一篇    下一篇

由聚苯胺粒子组成的电流变液的研究

官建国, 谢洪泉   

  1. 华中理工大学化学系, 武汉430074
  • 收稿日期:1994-07-05 修回日期:1994-12-08 出版日期:1995-06-10 发布日期:1995-06-10

Study on Electrorheological Fluid Containing Polyaniline Particles

Guan Jianguo, Xie Hongquan   

  1. Department of Chemistry, Huazhong University of Science and Technology, Wuhan 430074
  • Received:1994-07-05 Revised:1994-12-08 Published:1995-06-10 Online:1995-06-10

PDF

462

被引次数

17 | 5

摘要： 由经碱处理的掺杂态聚苯胺(PAn)制得高介电常数的半导体PAn粒子,将其悬浮于电绝缘油可组成电流变液,讨论了电流变(ER)液的静态屈服应力(τs),电流密度等性能与PAn的介电常数(εp),导电率(σ),体积分数和应用电场强度的关系.对导电率相同的PAn粒子,用氨水处理的PAn粒子εp较用NaOH液处理的高,前者在σ足够低如σ≤1.0×10-7/cm时,ER液的τs随偶极系数的平方(β2)的增大而呈现非线性增加;后者ER液的τs随β2的增大出现一最大值.结果表明:由聚苯胺粒子可组成高电流变活性的无水ER液.

关键词: 电流变液, 聚苯胺, 悬浮液, 导电率, 介电常数

Abstract: The static electrorheological properties of suspensions containing doped polyaniline(PAn) particles,pretreated with alkaline agent,in insulating oil No.2 under direct current high electric field were studied as functions of dielectric constants, conductivity(σ),volume fraction of the particles as well as applied electric field strength.The results showed that the PAn particles of the same a pretreated by ammonia water possessed higher dielectricconstants than those pretreated by aqueous NaOH, In the former case yield stress of the sus-pension increased nonlinearly with dipolar coefficient square when a of PAn was low enough,i.e.σ≤1.0×10-7S/cm, while in the latter case a maximum yield stress occurred.As a re-sult anhydrous suspensions with high electrorheological activity can be obtained using PAnparticles pretreated with alkaline agent to a certain pH value.

Key words: electrorheological fluid, polyaniline, suspension, conductivity, dielectric constant

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