硅基磁流变粘弹性流体制备方法与流变学特性研究  

Preparation and rheological properties research for silica based magneto-rheological viscoelastic fluid (MRVF)

作　　者：周治江[1] 廖昌荣[1] 谢磊[1] 鞠锐[1] 张登友[2,3] 唐锐[2,3] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044 [2]国家仪表功能材料工程技术研究中心,重庆400707 [3]重庆材料研究院,重庆400707

出　　处：《功能材料》2013年第17期2554-2558,共5页Journal of Functional Materials

基　　金：国家科技支撑计划资助项目(2012BAF06B04);中央高校科研专项基金资助项目(CDJZR13120049);重庆市基础与前沿研究计划资助项目(CSTC2013JJB0105)

摘　　要：针对磁流变液的静置沉降和磁流变弹性体控制范围小的问题,以六甲基二硅氧烷和聚二苯基硅氧烷的反应物作为磁流变材料的载体,加入特殊的添加剂,采用球磨分散方法,研制出了4种不同组分磁流变粘弹性流体(MRVF)样品。采用奥地利安东帕高级旋转流变仪(MCR-301)对上述样品进行了流变学性能测试。实验表明在剪切率为200s-1,磁感应强度为0～0.9T条件下,剪切应力的调节范围为5～120kPa;根据剪切应力与剪切率的关系曲线,采用高斯函数描述其本构模型,并运用最小二乘法辨识其模型参数;在25～80℃温度范围内测试了磁流变粘弹性流体的温度衰减特性,其剪切应力衰减不超过10%;经3个月静置观察,磁流变粘弹性流体的沉降率低于4%。In order to overcome the particle sedimentation issue of MRF, along with the small control range trou ble of MRE, a new MR material, named as magneto-rheological viscoelastic fluid （MRVF）, was put forward. The carrier of MRVF was based on the chemical products of hexamethyldisiloxane and polyborodiphenylsilox- ane. By means of ball milling method and special additives, four samples are developed. The rotary rheometer, Austrian Anton Par MCR-301, was used to test the rheological properties of the samples. The experimental re- sults show that the shear stress varies from 5 to 120kPa with the shear rate of 200s-1 and magnetic induction in- tensity of 0-0.9T. According to the curves of shear stress versus shear rate, Gaussian Function was adopted to describe the constitutive model, and the least square method was applied to identify the parameters of the mod- el. The shear stress decreases less than 10% with temperature increasing from 25 to 80℃. After standing for three months, the sedimentation rate of the samples was less than 4%.

关 键 词：磁流变粘弹性流体(MRVF) 本构模型 沉降 

分 类 号：O373[理学—流体力学]