摘要
通过巯基-烯烃的点击反应将全氟辛基乙烯接枝到Fe_3O_4@SiO_2-SH表面,得到一种可自分散到全氟聚醚油中的磁性纳米微粒,最终形成无表面活性剂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、透射电镜和振动样品磁强计对所得磁性复合材料进行表征。并将此磁流体置于离心机中以3000r/min的转速,离心10min,测定其稳定性。结果表明:最稳定磁流体的磁性微粒的合成条件为:反应温度40℃,氨水用量4.00mL,Fe^(2+)/Fe^(3+)=1.5∶2(摩尔比),TEOS用量3.00mL,3-巯基丙基三甲氧基硅烷用量1.00mL。用该磁性微粒配制的磁流体在离心条件下无明显分层现象,稳定性最高。
The perfluorooctyl ethylene was grafted onto the surface of Fe3O4@SiO2-SH by the click reaction of mercapto-olefins to obtain a magnetic nanoparticle,which can self-dispersible into perfluoropolyether oil to form stable perfluoropolyether based magnetic fluid without surfactant added in.The obtained composites were characterized by fourier transform infrared spectroscopy,X-ray diffraction,transmission electron microscope and vibrating sample magnetometer.To determine its stability,the magnetic fluid was centrifuged in a high centrifuge at a speed of 3000 r/min for 10 min.The results showed that the modificated magnetic particles in most stable magnetic fluid was synthesized at 40℃,with optional molar ratio of Fe^2+/Fe^3+=1.5∶2,about 3 mL ammonia and TEOS was added in and 1.00 mL trimethoxysilylpropanethiol was used.
作者
朱胜兰
李莎莎
邹伟
杨虎
颜杰
李斌
Zhu Shenglan;Li Shasha;Zou Wei;Yang Hu;Yan Jie;Li Bin(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
2019年第1期156-159,165,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)
四川理工学院研究生创新基金(y2016010)
关键词
点击反应
全氟辛基乙烯
磁流体
稳定性
click reaction
perfluorooctyl ethylene
magnetic fluid
stability
