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Dynamic rheological properties of polyurethane-based magnetorheological gels studied using oscillation shear tests

机译：采用振动剪切试验研究了基于聚氨酯的磁流变凝胶的动态流变性能

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摘要

This paper studies the dynamic rheological behaviors of magnetorheological (MR) gels containing different CIP weight fractions suspended in polyurethane (PU). The dynamic characteristics of prepared MR gels are obtained using large amplitude oscillation shearing (LAOS). The influence of strain amplitude, applied coil current, CIP weight fraction and driving angular frequency on the dynamic rheological properties of MR gels are systematic discussed. The results demonstrate the onset strain from linear viscoelastic region to non-linear viscoelastic region increases with applied coil current. The maximum loss modulus increases with applied coil current and CIP mass fraction. The larger the coil current and CIP mass fraction, the greater the shear strain corresponding to the maximum value. Microstructural variation of self-assembled copolymer chains and magnetic-induced CIP chains at different strain amplitudes, applied coil currents and CIP weight fractions are proposed as an explanation of the non-linear rheological behaviors of PU-based MR gels.
机译：本文研究了含有不同CIP重量级分悬浮在聚氨酯（PU）中的磁流变（MR）凝胶的动态流变行为。使用大振幅振荡剪切（LAOS）获得制备MR凝胶的动态特性。应变幅度，施加的线圈电流，CIP重量分数和驱动角频率对MR凝胶的动态流变性能​​的影响是系统的。结果证明了从线性粘弹性区域到非线性粘弹性区域的起始应变随施加的线圈电流增加。最大损耗模量随施加的线圈电流和CIP质量分数而增加。线圈电流和CIP质量分数越大，对应于最大值的剪切应变越大。提出了不同应变幅度，施加的线圈电流和CIP重量级分的自组装共聚物链和磁性诱导的CIP链的变型作为PU基MR凝胶非线性流变行为的解释。

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  • 来源
    《RSC Advances》 |2019年第18期|共11页
  • 作者

    Zhang Guang; Wang Huixing; Wang Jiong; Zheng Jiajia; Ouyang Qing;

  • 作者单位

    Nanjing Univ Sci &

    Technol Sch Mech Engn Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Sch Mech Engn Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Sch Mech Engn Nanjing 210094 Jiangsu Peoples R China;

    Zhejiang Normal Univ Sch Engn Jinhua 321004 Zhejiang Peoples R China;

    Jiaxing Univ Sch Mech Engn Jiaxing 314001 Zhejiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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