Autonomously Oscillating Viscosity in Microgel Dispersions
Autonomously Oscillating Viscosity in Microgel Dispersions
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DOI：
10.1021/ja904677g
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发表时间：
2009-09-02
影响因子：
15
通讯作者：
Yoshida, Ryo
中科院分区：
文献类型：
--
作者：
Suzuki, Daisuke;Taniguchi, Hajime;Yoshida, Ryo
我们提出了自主振荡粘度在微凝胶分散体。通过将用于Belousov-Zhabotinsky（BZ）反应的Ru催化剂引入到交联共聚物中获得微凝胶。在这种微凝胶体系中，BZ反应的化学能被转化为微凝胶的有节奏的溶胀/去溶胀振荡。此外，自分散/自分散振荡的微凝胶发生在其相变温度附近。通过使用微凝胶的这两种振荡，发现了胶体分散体的新功能，即微凝胶分散体中的自主振荡粘度。在分散体的粘度自主振荡，以下的微凝胶的溶胀/去溶胀和自絮凝/自分散振荡。因此，我们可以利用微凝胶的这两种现象来控制振荡的节奏和幅度。
We present autonomously oscillating viscosity in microgel dispersions. The microgels were obtained by introducing the Ru catalyst for the Belousov-Zhabotinsky (BZ) reaction into a cross-linked copolymer. In this microgel system, the chemical energy of the BZ reaction is converted to rhythmic swelling/deswelling oscillation of the microgels. Moreover, self-flocculating/self-dispersing oscillation of the microgels occurs near its phase transition temperature. Through the use of these two oscillations of the microgels, a new function of colloidal dispersions has been discovered, namely, autonomously oscillating viscosity in a microgel dispersion. The viscosity in the dispersion oscillated autonomously, following the swelling/deswelling and self-flocculation/self-dispersion oscillations of the microgels. As a result, we can control the rhythm and amplitude of the oscillation using these two phenomena of the microgels.