聚氰基丙烯酸正丁酯磁性纳米球的制备与表征

Preparation and characterization of polybutylcyanoacrylate magnetic nanoparticles

目的 制备聚氰基丙烯酸正丁酯(PBCA)磁性纳米球。方法 乳化聚合法制备磁性纳米球的悬浮液，光子相关光谱仪和透射电镜测定磁性纳米球的粒径及其分布；紫外分光光度法测定磁性纳米球中Fe含量。结果 获得了水溶性正癸酸稳定的Fe3O4磁流体的粒径及其分布，以及载体浓度与稳定剂浓度对磁性纳米球粒径及其分布的影响。结论 首次在pH=6．3～6．4条件下用乳化聚合法制备了PBCA磁性纳米球的稳定悬浮液。

Objective To Prepare and characterize polybutylcyanoacrylate (PBCA) magnetic nanoparticles. Methods The suspension of PBCA magnetic nanoparticles was prepared by emulsion polymerization method. The particle size, size distri- bution, polydispersity and other parameters were determined by photon correlation spectroscopy and transmission electron microscopy, and the iron content in the nanoparticles by ultraviolet spectroscopy. Results The data of the particle size and size distribution of aqueous decanoic acid stabilized Fe3O4 magnetic fluids were acquired, and the influences of concentrations of butylcyanoacrylate (BCA) and Dextran-70 on the particle size and size distribution of PBCA magnetic nanoparticles were characterized. Conclusion We have for the first time successfully prepared stable suspension of PBCA magnetic nanoparti- cles by emulsion polymerization method at pH 6.3-6.4 in aqueous medium.