摘要
以矿物油为基液的油基磁流体存在环境污染、难以生物降解的问题。植物油具有绿色环保、生物降解性强等优点。本文以植物油为基液,利用两步法制备了Ni_(0.5)Zn_(0.5)Fe_(2)O_(4)磁流体,应用正交实验研究了沉降稳定性,采用单一变量法研究了黏度特性及磁黏特性。其结果表明:以丙酮为分散剂,质量分数为11%,Ni_(0.5)Zn_(0.5)Fe_(2)O_(4)质量分数为2.4%时,沉降稳定性较佳;在零磁场/磁场条件下,黏度随温度的升高而降低;黏度随分散剂和Ni_(0.5)Zn_(0.5)Fe_(2)O_(4)质量分数的增大而先增大后减小,分别在分散剂质量分数为11%时和Ni_(0.5)Zn_(0.5)Fe_(2)O_(4)质量分数为2.4%时出现拐点;黏度随磁场强度的增大而增大,呈非牛顿流体的特征。植物油是磁流体基液的一种理想选择,植物油基磁流体有较好的沉降稳定性,相较于矿物油基磁流体具有独特的优势,未来可将植物油基磁流体作为一种新型的环保工作介质。
The mineral oil-based magnetic fluid has the problems of environmental pollution and difficulty in biodegradation.Vegetable oil has the advantages of being green and excellent biodegradability.In this paper,Ni_(0.5)Zn_(0.5)Fe_(2)O_(4) magnetic fluid was prepared by two-step method using vegetable oil as base liquid.The sedimentation stability was studied by orthogonal experiment,and the viscosity properties and magnetoviscous effects were studied by single variable method.Experimental results showed that the sedimentation stability was better when acetone was used as dispersant with a mass fraction of 11% and Ni_(0.5)Zn_(0.5)Fe_(2)O_(4) mass fraction of 2.4%.Under the condition of no magnetic field or magnetic field,the viscosity decreased with increasing temperature.The viscosity increased and then decreased with increasing mass fraction of dispersant and Ni_(0.5)Zn_(0.5)Fe_(2)O_(4),and the inflection point appeared when the mass fraction of dispersant was 11%and the mass fraction of Ni_(0.5)Zn_(0.5)Fe_(2)O_(4) was 2.4%.The viscosity increased with increasing magnetic field intensity,showing the characteristics of non-Newtonian fluids.Vegetable oil as the base liquid of magnetic fluids was an ideal choice.Vegetable oil-based magnetic fluid had better sedimentation stability,having unique advantages over mineral oil-based magnetic fluid.In the future,vegetable oil-based magnetic fluid can become a new environmentally friendly working medium.
作者
谢志伟
吴张永
朱启晨
蒋佳骏
梁天祥
刘振阳
XIE Zhiwei;WU Zhangyong;ZHU Qichen;JIANG Jiajun;LIANG Tianxiang;LIU Zhenyang(College of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2023年第7期3623-3633,共11页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(51165012)
云南省教育厅科学研究基金(2015Y080)
昆明理工大学分析测试基金(2021P20203103003)。
关键词
磁流体
植物油
纳米粒子
分散系
沉降稳定性
黏度
磁黏特性
magnetic fluid
vegetable oil
nanoparticles
dispersion
sedimentation stability
viscosity
magnetoviscous effects
