不同比表面积SiO2对磁流变液流变特性和沉降稳定性的影响
Effect of SiO2 with Different Specific Surface Areas on Rheological Properties and Sedimentation Stability of Magnetorheological Fluid
摘 要
以羰基铁粉为磁性颗粒，不同比表面积（150，200，380 m2·g-1）纳米SiO2粒子为触变剂制备了磁流变液，研究了不同比表面积SiO2对磁流变液流变特性和沉降稳定性的影响。结果表明：SiO2的比表面积越大，磁流变液的饱和磁化强度和相对磁导率越大；随着SiO2比表面积的增大，磁流变液的零场黏度先快速增大后略微减小，剪切应力、屈服应力和沉降稳定性增大；当SiO2比表面积为380 m2·g-1时，磁流变液表现出优良的可控性。
SiO2
比表面积
零场黏度
剪切性能
沉降稳定性
magnetorheological fluid (MRF)
SiO2
specific surface area
off-state viscosity
shear performance
sedimentation stability
Abstract
Magnetorheological fluids were prepared by using carbonyl iron as magnetic particles and SiO2 nanoparticles with different specific surface areas (150, 200, 380 m2·g-1) as thixotropic agent. The effects of SiO2 with different specific suface areas on the rheological properties and sedimentation stability of magnetorheological fluids were studied. The results show that the larger the specific surface area of SiO2, the greater the saturation magnetization and the relative permeability of the magnetorheological fluid. With the increase of the specific surface area of SiO2, the off-state viscosity of the magnetorheological fluid increased rapidly and then decreased slightly, and the the shear stress, yield stress and sedimentation stability increased. When the specific surface area of the SiO2 was 380 m2·g-1, the magnetorheological fluid showed an excellent controllability.
中图分类号 TB381 DOI 10.11973/jxgccl201810002
所属栏目 试验研究
基金项目 国家自然科学基金资助项目（51175265；51675280）
收稿日期 2017/8/7
修改稿日期 2018/7/16
网络出版日期
作者单位点击查看
备注郭秋月(1991-),女,河北衡水人,硕士研究生
引用该论文: GUO Qiuyue,WANG Jiong,OUYANG Qing. Effect of SiO2 with Different Specific Surface Areas on Rheological Properties and Sedimentation Stability of Magnetorheological Fluid[J]. Materials for mechancial engineering, 2018, 42(10): 8～12
郭秋月,王炅,欧阳青. 不同比表面积SiO2对磁流变液流变特性和沉降稳定性的影响[J]. 机械工程材料, 2018, 42(10): 8～12
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【6】FU Q, WANG D H, XU L, et al. A magnetorheological damper-based prosthetic knee (MRPK) and sliding mode tracking control method for an MRPK-based lower limb prosthesis[J].Smart Materials and Structures,2017,26(4):045030.
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【12】ALVES S, ALCANTARA M R, NETO A M F. The effect of hydrophobic and hydrophilic fumed silica on the rheology of magnetorheological suspensions[J]. Journal of Rheology, 2009, 53(3):651-662.
【13】丁丁, 晏华, 胡志德, 等. 基础油种类对磁流变液流变性能及稳定性的影响[J]. 后勤工程学院学报, 2016, 32(2):77-81.
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【15】尹林茂, 范智超, 孟媛, 等. 静磁场下磁流变液微结构演化的实验研究[J]. 西南大学学报(自然科学版), 2011, 33(5):155-160.
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