School of Chemical and Biological Engineering, Seoul National University , 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea.
ACS Appl Mater Interfaces. 2017 Oct 18;9(41):36358-36367. doi: 10.1021/acsami.7b08298. Epub 2017 Oct 6.
The mixed geometrical effect on the electrorheological (ER) activity of bimodal ER fluids was investigated by mixing SiO spheres and rods of different dimensions. To gain an in-depth understanding of the mixed geometrical effect, 12 bimodal ER fluids were prepared from 4 sizes of SiO spheres (50, 100, 150, and 350 nm) and 3 types of SiO rods with different aspect ratios (L/D = 2, 3, and 5). Five concentrations of SiO spheres and rods were created for each bimodal ER fluid, resulting in a total of 60 sets of comprehensive ER measurements. Some bimodal ER fluids exhibited enhanced ER performance, as high as 23.0%, compared to single SiO rod-based ER fluids to reveal the mixed geometrical effect of bimodal ER fluids. This interesting experimental result is based on the structural reinforcement provided by spheres to fibrillated rod materials, demonstrating the mixed geometrical effect on ER activity.
通过混合不同尺寸的 SiO 球和棒，研究了混合几何效应对电流变（ER）活性的影响。为了深入了解混合几何效应，我们使用 4 种不同尺寸的 SiO 球（50、100、150 和 350nm）和 3 种不同纵横比（L/D=2、3 和 5）的 SiO 棒制备了 12 种双模态 ER 流体。对于每种双模态 ER 流体，我们都创建了 5 种 SiO 球和棒的浓度，总共进行了 60 组全面的 ER 测量。与基于单 SiO 棒的 ER 流体相比，一些双模态 ER 流体表现出更高的 ER 性能，高达 23.0%，以揭示双模态 ER 流体的混合几何效应。这一有趣的实验结果基于球对纤维状棒材提供的结构增强，证明了混合几何效应对 ER 活性的影响。
