Willenbacher N, Oelschlaeger C, Schopferer M, Fischer P, Cardinaux F, Scheffold F
Institute of Mechanical Process Engineering and Mechanics, Universität Karlsruhe, 76131 Karlsruhe, Germany.
Phys Rev Lett. 2007 Aug 10;99(6):068302. doi: 10.1103/PhysRevLett.99.068302.
We characterize the linear viscoelastic shear properties of an aqueous wormlike micellar solution using diffusing wave spectroscopy (DWS) based tracer microrheology as well as various mechanical techniques such as rotational rheometry, oscillatory squeeze flow, and torsional resonance oscillation covering the frequency range from 10(-1) to 10(6) rad/s. Since DWS as well as mechanical oscillatory squeeze flow and torsional resonance oscillation cover a sufficiently high frequency range, the persistence length of wormlike micelles could be determined directly from rheological measurements for the first time.
我们使用基于扩散波谱（DWS）的示踪微流变学以及各种机械技术，如旋转流变学、振荡挤压流动和扭转共振振荡，来表征蠕虫状胶束水溶液的线性粘弹性剪切特性，这些技术覆盖了从10⁻¹到10⁶弧度/秒的频率范围。由于DWS以及机械振荡挤压流动和扭转共振振荡覆盖了足够高的频率范围，首次能够直接从流变学测量中确定蠕虫状胶束的持久长度。
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