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高等学校化学研究 ›› 2004, Vol. 20 ›› Issue (6): 771-773.

• Articles • 上一篇    下一篇

Transition Between Solid-like and Liquid-like States in Soft Silica Suspensions

AN Kang, HU Ji-fan, SUN De-jun, QIN Hong-wei, ZHANG Jie, HAN Tao, ZHANG Ling   

  1. School of Physics and Microelectronics, Shandong University, Jinan 250100, P. R. China
  • 收稿日期:2003-09-29 出版日期:2004-12-24 发布日期:2011-08-06
  • 基金资助:

    Supported by the National Natural Science Foundation of China(No.20243002).

Transition Between Solid-like and Liquid-like States in Soft Silica Suspensions

AN Kang, HU Ji-fan, SUN De-jun, QIN Hong-wei, ZHANG Jie, HAN Tao, ZHANG Ling   

  1. School of Physics and Microelectronics, Shandong University, Jinan 250100, P. R. China
  • Received:2003-09-29 Online:2004-12-24 Published:2011-08-06
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.20243002).

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被引次数

1

摘要： The influences of silica volume fraction, electrolyte concentration and pH value upon the stress dependence of elastic modulus G′and viscous modulus G″ were investigated. The results show that the suspension transforms from a liquid-like state to a solid-like state with increasing the volume fraction of silica. Such a solid-like state can be transformed back into a liquid-like state under the application of a larger stress. At the higher volume fraction, the larger critical stress is required to induce the transition from solid-like to liquid-like state. As the electrolyte concentration decreases or pH value increases, the inter-particle force increases, which causes the state transition to occur at a higher stress.

关键词: Soft matter, State transition, Suspension

Abstract: The influences of silica volume fraction, electrolyte concentration and pH value upon the stress dependence of elastic modulus G′and viscous modulus G″ were investigated. The results show that the suspension transforms from a liquid-like state to a solid-like state with increasing the volume fraction of silica. Such a solid-like state can be transformed back into a liquid-like state under the application of a larger stress. At the higher volume fraction, the larger critical stress is required to induce the transition from solid-like to liquid-like state. As the electrolyte concentration decreases or pH value increases, the inter-particle force increases, which causes the state transition to occur at a higher stress.

Key words: Soft matter, State transition, Suspension