School of Materials Science and Engineering, Hebei University of Engineering, Handan, 056038, China.
Soft Matter. 2018 Mar 7;14(10):1917-1924. doi: 10.1039/c7sm02425h.
Superparamagnetic FeO nanoparticles were successfully deposited on the surface of MoS nanosheets (FeO/MoS) by a sonochemical method and the obtained FeO/MoS nanocomposites were used as a promising candidate for a magnetorheological (MR) fluid. This MR fluid was prepared from the FeO/MoS nanocomposites and its corresponding MR performances were examined using a rotational rheometer. The MR fluid based on FeO/MoS showed typical MR effects with increasing viscosity, shear stress, yield stress and dynamic shear modulus depending on the applied magnetic fields. Compared with commercial carbonyl iron (CI) particles, the sedimentation stability of the FeO/MoS-MR fluid was greatly improved because of its unique two-dimensional structure and the reduced fluid-particle density mismatch. Therefore, the prepared FeO/MoS-based MR fluid with typical MR effects and good sedimentation stability would have great potential in practical applications.
通过超声化学法成功地将超顺磁的 FeO 纳米颗粒沉积在 MoS 纳米片的表面上（FeO/MoS），所得到的 FeO/MoS 纳米复合材料可用作一种有前途的磁流变（MR）流体。该 MR 流体由 FeO/MoS 纳米复合材料制备，并使用旋转流变仪对其相应的 MR 性能进行了检查。基于 FeO/MoS 的 MR 流体表现出典型的 MR 效应，随着施加磁场的增加，粘度、剪切应力、屈服应力和动态剪切模量均有所增加。与商用羰基铁（CI）颗粒相比，由于其独特的二维结构和减小的流体-颗粒密度不匹配，FeO/MoS-MR 流体的沉降稳定性得到了极大改善。因此，具有典型 MR 效应和良好沉降稳定性的所制备的基于 FeO/MoS 的 MR 流体在实际应用中具有巨大的潜力。
