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- 2018
取向磁场对钴颗粒填充硅橡胶磁流变弹性体动态黏弹性的影响
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Abstract:
为了研究取向磁场强度对磁流变弹性体（MRE）动态黏弹性的影响规律及影响机制，采用溶剂热法制备球状钴颗粒，SEM和XRD表征结果显示，其粒径为1~2 μm，呈密排六方结构。以硅橡胶为基体，以钴颗粒为填充相，分别在0 mT、480 mT、1 154 mT取向磁场强度下制备MRE，并在不同工况下测试其动态黏弹性。实验结果表明，Co颗粒填充的MRE微观结构的有序性随取向磁场强度增大而增加，其储能模量G'、损耗模量G ″和磁流变效应也随之提高；当取向磁场强度增大到一定程度，由于有序结构趋于稳定，动态黏弹性随取向磁场的变化较小。 In order to investigate the mechanism of the effect of orientation magnetic field on dynamic viscoelasticity of cobalt particles filled magnetorheological elastomer (MRE), cobalt particles were synthesized by a solvothermal method. The XRD and SEM results indicate the spherical cobalt particles have close-packed hexagonal structure with particle size within the range of 1-2 μm. Silicone rubber was used as the matrix to prepare cobalt particles filled MRE. During the curing process, different orientation fields (0 mT, 480 mT and 1 154 mT) were applied to prepare different MRE, and their dynamic viscoelasticity were tested. The results indicate the ordered structure formed by the cobalt particles was enhanced with increasing orientation field. As a result, the storage modulus G ' and the loss modulus G ″ of Co particles filled(MRE) increase with increasing orientation field. However, when the orientation field exceeds a critical value, the ordered becomes stable, and the effect of orientation field on dynamic viscoelasticity of MREs becomes insignificant. 国家自然科学基金（51478088）
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