摘要
为了解基体中羰基铁粉含量对磁流变胶流变特性的影响,研制了3种羰基铁粉质量分数分别为40%、60%和80%的磁流变胶。采用振动样品磁强计研究不同羰基铁粉质量分数下材料的磁滞回特性;利用磁流变仪在连续旋转剪切、振荡剪切2种模式下分别测试材料在不同磁感应强度下的动态流变特性(B=0 mT、240 mT、480 mT、720 mT和960 mT);通过振荡剪切测量得到材料的粘弹性特性,以分析应变幅值和频率对不同磁通密度下磁流变凝胶粘弹性的影响。结果发现:羰基铁粉质量分数对材料饱和磁矩有很大影响,且具有较高羰基铁粉质量分数的材料具有较高的饱和磁矩;在外加磁通密度下,剪切应力随着质量分数的增加而增加;随着羰基铁粉质量分数的增加,弹性特性变得更加明显,但是,它对材料的粘性具有相反的影响。
In order to understand the influence of the content of carbonyl iron powder in the matrix on the rheological properties of the magnetorheological gel,three magnetorheological gels with the mass fraction of carbonyl iron powder of 40%,60%and 80%were developed.The vibrating sample magnetometer is used to study the hysteresis characteristics of the material under different mass fractions of carbonyl iron powder.The dynamic flow of the material under different magnetic induction intensity is tested by the magnetorheometer in two modes of continuous rotating shear and oscillating shear.Variation characteristics and viscoelastic properties of the material are measured by oscillating shear to analyze the effect of strain amplitude and frequency on magnetorheological condensation under different magnetic flux densities(B=0 mT,240 mT,480 mT,720 mT and 960 mT).The results show that the mass fraction of carbonyl iron powder has a great influence on the saturation magnetic moment of the material,and the material with a higher mass fraction of carbonyl iron powder has a higher saturation magnetic moment.Under the external magnetic flux density,the shear stress increases with the increase of the mass fraction.With the increase in the mass fraction of the carbonyl iron powder,the elastic properties become more obvious,but it has an opposite effect on the viscosity of the material.
作者
石利云
SHI Liyun(Hebei Chemical&Pharmaceutical Vocational Technology College,Shijiazhuang,Hebei 050026,China)
出处
《贵州师范大学学报（自然科学版）》
CAS
2022年第3期82-89,共8页
Journal of Guizhou Normal University：Natural Sciences
基金
国家自然科学基金资助项目(5167050237)
河北省教育厅青年基金项目(QN2018206)。
关键词
聚氨酯
磁流变凝胶
羰基铁粉含量
振荡剪切
粘弹性特性
polyurethane
magnetorheological gel
carbonyl iron particle content
oscillating shear
viscoelastic performance
