摘要
首先采用滴定水解法,以氢氧化氨溶液水解六水合三氯化铁与四水合二氯化铁的混合溶液制备出钠米四氧化三铁微粒;然后采用离子凝胶反应法,在分散有纳米四氧化三铁的壳聚糖溶液中,加入适量的三聚磷酸钠溶液制得包覆有纳米四氧化三铁的壳聚糖复合微球载体。该复合微球具有磁响应功能并具有生物可降解特性。因此该复合微球在功能材料、军事领域及医学领域具有十分重要的应用前景。
The Fe3O4 nanoparticles are prepared by hydrolyzing FeCl3·6H2O and FeCl2·4H2O mixed solution with NH4OH solution, or titration hydrolyzation method. Fe3O4/chitosan composite microspheres are prepared by adding a proper amount of TPP solution to chitosan solution dispered with Fe3O4 nanoparticles, or ionotropic gelation method. This composite microsphere is magnetically responsive and biodegradable, and thus can be used as functional material or carrier for the delivery of drugs.
出处
《磁性材料及器件》
CAS
CSCD
2002年第6期1-4,共4页
Journal of Magnetic Materials and Devices
