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壳聚糖通过与丙烯酸接枝共聚制得壳聚糖聚丙烯酸悬浮液,在铁磁流体(Fe3O4)与聚乙二醇(分散剂)存在下通过与戊二醛交联,制备了磁性壳聚糖聚丙烯酸微球。用扫描电镜、红外光谱对合成的高分子微球进行形貌观察和结构表征,并进行了元素分析和磁性能测试,研究了磁性微球对牛血清白蛋白(BSA)的吸附效果。结果表明,合成的磁性微球外表呈球形,粒径为100～400nm;当Fe含量为2.47%时,磁性微球的饱和磁化强度约为1.30emug,磁矫顽力为280Oe,磁化率为2.16×10-4(常温下),属于顺磁性材料;其对BSA有较好的吸附效果,饱和吸附量约为400mgg。
Chitosan graft copolymerization with acrylic acid to prepare chitosan polyacrylic acid suspension, in the presence of ferrofluid (Fe3O4) and polyethylene glycol (dispersant) cross-linked with glutaraldehyde prepared magnetic shell poly Sugar polyacrylic acid microspheres. The morphology and structure of the prepared polymer microspheres were characterized by scanning electron microscopy and infrared spectroscopy. The elemental analysis and magnetic properties were also studied. The adsorption of BSA by magnetic microspheres was studied. The results show that the magnetic microspheres have a spherical shape and a particle size of 100-400 nm. When the content of Fe is 2.47%, the saturation magnetization of the magnetic microspheres is about 1.30emug, the magnetic coercivity is 280 Oe and the magnetic susceptibility is 2.16 × 10-4 (at room temperature), which belongs to the paramagnetic material. It has a good adsorption effect on BSA and the saturated adsorption capacity is about 400mgg.