Li Guanying, Cortes William, Zhang Qizheng, Zhang Ye
Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan.
Front Chem. 2020 Oct 23;8:583165. doi: 10.3389/fchem.2020.583165. eCollection 2020.
Liquid crystalline gels offer promising means in generating smart materials due to programmable mechanics and reversible shape changes in response to external stimuli. We demonstrate a simple and convenient method of constructing catalyst-embedded lyotropic liquid crystalline (LLC) gels and achieve chemomechanical oscillator by converting chemical waves in Belousov-Zhabotinsky (BZ) reaction. We observe the directed chemical oscillations on LLC sticks accompanied by small-scale oscillatory swellings-shrinkages that are synchronized with the chemical waves of an LLC stick. To amplify the mechanical oscillations, we further fabricate small LLC fibers and achieve macroscopically oscillatory bending-unbending transition of the LLC fiber driven by a BZ reaction.
由于其可编程力学性能以及能响应外部刺激而发生可逆形状变化，液晶凝胶为生成智能材料提供了有前景的方法。我们展示了一种构建嵌入催化剂的溶致液晶（LLC）凝胶的简单便捷方法，并通过在贝洛索夫-扎博廷斯基（BZ）反应中转换化学波来实现化学机械振荡器。我们观察到LLC棒上的定向化学振荡，同时伴有与LLC棒化学波同步的小规模振荡膨胀-收缩。为了放大机械振荡，我们进一步制造了小的LLC纤维，并实现了由BZ反应驱动的LLC纤维宏观振荡弯曲-伸直转变。
