油田用磁流变弹性体室内研究

磁流变弹性体（MRE）是将磁性粒子分散在高聚物基体中,固化后形成的复合材料.相较于磁流变液,具有不易沉降、性能稳定、控制可逆、响应迅速等优点,MRE作为新兴的智能材料,在石油钻采领域有广泛的应用前景.制备了以天然橡胶（NR）为基体,不同磁性粒子含量的各向同性和各向异性MRE,分析了样品的磁流变性能、物理机械性能和耐油性能.结果表明,随着磁性粒子含量的上升,样品的磁流变性能、交联密度、热稳定和耐油性能都明显提升,但力学性能所下降.在500 mT外加磁感应强度下,50％的各向异MRE相对磁流变效应为26.87％,绝对磁流变效应为0.61 MPa.

Laboratory study on magnetorheological elastomers for oilfield

Magnetorheological elastomers are a couple of composite materials,mainly composed of magnetic particles and elastic polymer matrix.Different from magnetorheological fluids,MRE as a group of smart materials,with the advantages of unease settlement,stable performance,reversible control,swirt response,etc.There are broad applications in the field of oil drilling.Isotropic and anisotropic MRE based on natural rubber were prepared with different contents of magnetic particles and also the magnetic rheological properties,oil resistance,physical and mechanical properties of the samples were analyzed.The results showed that the magneto-induced effect,the crosslinking density,thermal stability and oil resistance were improved,during the content of iron particles increased,but the mechanical properties declined slightly.When the iron particle weight fraction is 50％ and the applied magnetic field was above 500 mT,the absolute magneto-induced effect can reach 0.61 MPa,and the relative value was 26.87％.