Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (12): 1411-1414.doi: 10.3866/PKU.WHXB20051217

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Small Amplitude Oscillation Frequency Sweep of Lamellar Liquid Crystal

WANG Hong-Xia;ZHANG Gao-Yong;LIU Dian-Sheng;ZHANG Xin-Wei;XIAO Yong-Hong   

  1. Department of Chemistry, Shanxi University, Taiyuan 030006;Taiyuan National High-Tech Industrial Development Zone, Taiyuan 030006; China Research Institute of Daily Chemical Industry, Taiyuan 030001
  • Received:2005-04-20 Revised:2005-06-08 Published:2005-12-15
  • Contact: WANG Hong-Xia

Abstract: The viscoelastic properties of lamellar liquid crystal, formed by non-ionic surfactant, were studied with small amplitude oscillation frequency sweep, and the effects of surfactant concentration, temperature , AgNO3 and as-produced Ag on them were investigated. The results show that, storage modulus (G′) and loss modulus(G″)increase with increasing surfactant concentration; three different kinds of frequency sweep curves appear with increasing temperature; AgNO3 and as-produced Ag have no effects on the shape of curves, but their effects on the magnitude of G′and G″are different for transitional and pure lamellar phases.

Key words: Lamellar liquid crystal, Rheology, Frequency sweep