摘要
以FeSO4和FeCl3为主要原料,用十二烷基磺酸钠作为表面活性剂,制备了稳定的水分散性Fe3O4磁流体.再以聚乙二醇、甲苯-2,4-二异氰酸酯和丙烯酸-β-羟乙酯合成聚氨酯(PU)大分子单体.在Fe3O4磁流体存在下,以乙醇/水为分散介质,过硫酸钾作为引发剂,通过苯乙烯与PU大分子单体共聚制备出了两亲磁性聚合物微球.所制得的磁性聚合物微球粒径小,平均粒径约14μm;在磁场中的沉降速度为自然沉降速度的8倍,试验结果说明磁性聚合物微球的磁性很强,磁性聚合物微球具有简便、快速的磁分离特性.
First, Fe3O4 magnetic fluid was prepared by coprecipitation method using FeSO4 and FeCl3 as main materials, sodium dodecane sulfate as surfactant. Then, polyurethane（PU） macromonomer was prepared by using poly（ethylene oxide）, 2,4-toluene diisocyanate（TDI） and β-hydroxyethyl acrylate（HEA）. Amphiphilic magnetic polymer microspheres were synthesized by copolymerization of styrene with PU macromonomer in the presence of Fe3O4 magnetic fluid in ethanol/water medium. The structure of copolymer was determined by infrared spectroscopy. The average size of magnetic microspheres characterized by scanning electron microscopy was about 14μm. The precipitation speed of suspension of magnetic microspheres in an additional magnetic field was 8 times of that without magnetic field. The magnetic microspheres have good magnetic properties and can be separated rapidly and easily.
出处
《兰州交通大学学报》
CAS
2006年第3期158-160,共3页
Journal of Lanzhou Jiaotong University
