BaTiO3 piezoelectric powder blended electrorheological fluids
BaTiO3 piezoelectric powder blended electrorheological fluids
复制标题
DOI：
10.7567/1347-4065/ab4d11
复制
发表时间：
2019-12
影响因子：
1.5
通讯作者：
Xu Wang;T. Karaki;K. Koyanagi;T. Fujii
中科院分区：
文献类型：
--
作者：
Xu Wang;T. Karaki;K. Koyanagi;T. Fujii
将压电颗粒（PEPs）与有机聚合物电流变颗粒（ER）在硅油中共混，制备了复合电流变液。通过加入表面活性剂聚乙二醇（PEG）分散粒子聚集体，大大提高了复合材料的剪切应力。与500 nm的钛酸钡复合材料表现出更好的电流变性能比50 nm的钛酸钡复合材料。纳米SiO2粉体的加入有效地提高了复合悬浮液的稳定性。光学显微镜观察表明，复合电流变液中的颗粒在外加电场作用下形成链状结构。与直流电场相比，高频交流电场使流体的链结构变细，链强度减弱。主要原因被认为是ER颗粒的响应时间为微秒量级。
In this paper, composite electrorheological (ER) fluids were prepared by blending piezoelectric particles (PEPs) with organic polymer ER particles in silicone oil. The shear stress of the composites was greatly improved by adding surfactant polyethylene glycol (PEG) to disperse the particle aggregation. Composites with 500 nm BaTiO3 showed better ER properties than that of the 50 nm BaTiO3 composite. Nano-sized SiO2 powder was effective in making the composite suspension stable. Optic microscope observation indicated that the particles in the composite ER fluid formed a chain structure under an applied electric field. Compared with the DC electric field, the high-frequency AC electric field made the chain structure of fluids thinner and weakened the strength of the chain. The main reason was considered to be that the response time of the ER particles was of the microsecond order.