摘要
通过酰胺反应成功将全氟聚醚酰氟接枝到SiO2包覆的Fe3O4表面,得到一种可自分散于全氟聚醚油的磁性微粒,最终制得了热力学稳定的全氟聚醚基磁流体。采用傅里叶变换红外光谱仪、X射线衍射仪、透射电镜、纳米粒度仪及振动样品磁强计对磁性复合材料结构及性能进行了表征。并将该全氟聚醚基磁流体置于离心机中离心,测定其稳定性。结果表明:在反应温度为50℃,Fe^2+/Fe^3+=1.5∶2(摩尔比),正硅酸四乙酯投加量为1.00mL,反应时间2h时制备的磁流体具有最好的磁学性能,且在4000r/min的离心条件下也不发生分层,具有极高的稳定性。
The perfluoropolyether acyl fluoride was grafted onto the surface of Fe3O4coated with SiO2 by amidation reaction to obtain a kind of magnetic particles,which can self-disperse in perfluoropolyether oil to form thermodynamical stable perfluoropolyether based magnetic fluid.The structure and properties of the magnetic fluid were characterized by fourier transform infrared spectroscopy,X-ray diffraction,transmission electron microscopy,particle analyzer and vibrating sample magnetometer.And for determining the stability of the magnetic fluid,it was centrifuged in a centrifuge.The results shown that the magnetic fluid with best magnetic property was synthesized at 50℃,with optional molar ratio of Fe^2+/Fe^3+=1.5∶2,about 1.00mL TEOS was add in and reaction time of 2hours.Meanwhile it was stable and without stratification,even under the centrifugal condition of 4000rpm.
作者
黄宇祥
朱胜兰
张鸣
邹伟
Huang Yuxiang;Zhu Shenglan;Zhang Ming;Zou Wei(Department of Chemical Engineering,Sichuan University of Science&Engineering,Zigong 643000;Zhonghao Chenguang Research Institute of Chemical Industry,Zigong 643201)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第4期112-116,共5页
New Chemical Materials
基金
四川省青年科技创新研究团队项目(2017TD0012)
四川理工学院精细化工助剂及表面活性剂四川省高效重点实验室项目(2014JXZ02)。
关键词
磁流体
全氟聚醚
热力学稳定
magnetic fluid
perfluoropolyether
thermodynamical stablity
