基础油种类对磁流变液流变性能及稳定性的影响  

Effect of Base Oil Type on Rheological Properties and Stability of Magnetorheological Fluid

作　　者：丁丁[1] 晏华[1] 胡志德[1] 王雪梅[1] 

机构地区：[1]后勤工程学院化学与材料工程系,重庆401311

出　　处：《后勤工程学院学报》2016年第2期77-81,90,共6页Journal of Logistical Engineering University

基　　金：重庆市研究生创新基金资助

摘　　要：为考察基础油对磁流变液的影响,以羰基铁粉为悬浮介质,4种不同种类的基础油为分散相制备了磁流变液。采用MCR302流变仪进行旋转和振荡2种剪切模式测试,考察了基础油对磁流变液流变性能的影响。通过自然沉降法对不同种类基础油磁流变液的沉降稳定性进行评估。结果表明:磁流变液样品黏度及黏弹性与基础油的黏度和类型均有关,其中以聚α-烯烃为基础油的磁流变液具有较高的储能模量,在低剪切速率下表现出高零场黏度,而以乙基硅油为基础油的磁流变液储能模量较低且损耗因子随剪切频率波动较大,沉降稳定性较差。In order to investigate the impact of base oil on the properties of magnetorheological fluid, magnetorheological flu-ids were prepared with carbonyl iron powder as magnetic particles, and four different types of base oil as the dispersed phase. Themagnetorheological properties were investigated with two kinds of shear test for rotation and oscillation by MCR302 rheometer. Inaddition, the effects of base oil on the sedimentary stability of the magnetorheological fluid were investigated by natural sedimenta-tion method. The results indicate that the viscosity and viscoelasticity of the magnetorheological fluid is related to not only viscositybase oils, but also its type. Among them, magneto-rheological fluid obtained with the poly α- olefin as base oil has a higher storagemodulus and a high zero-field viscosity at low shear rates. For magnetorheological fluid obtained with the ethyl silicone as base oilshows low energy storage modulus, loss factor volatility, poor sedimentary stability.

关 键 词：磁流变液 基础油 流变性能 稳定性 剪切模式 

分 类 号：TB381[一般工业技术—材料科学与工程]