磁致驱动纳米Fe_3O_4/PVA磁性复合膜的研制及其应用研究

Study on the Preparation and Application of Magnetic Drive Nano Magnetic Fe_3O_4/PVA Composite Membrane

磁致驱动膜材料,要求材料具有超顺磁性,膜表面光滑、有良好的机械性能.本文加入柠檬酸盐改性控制Fe3O4粒径生长,利用正交实验优化制备工艺条件：柠檬酸盐含量n（Fe）/n（柠檬酸盐）为0.5、pH值控制在9～10、反应温度、晶化温度为6℃、晶化时间是40 min.通过TEM、BET、VSM、XRD以及ANSYS仿真软件等测试手段分别对其进行表征,结果表明：柠檬酸盐可控制Fe3O4微晶的生长,同时作为分散剂使分散的Fe3O4在水中形成胶体,以保证最终形成的纳米Fe3O4粒径分布均匀.制备的纳米Fe3O4具有超顺磁性,纳米磁性材料的粒径可控制到15 nm范围内,制备的磁致驱动Fe3O4/PVA复合膜的外观均匀光滑,其磁感应性能具有良好的表现,其动力学仿真分析和理论分析相吻合.

Magnetic driven membrane material,require materials with superparamagnetic,membrane surface is smooth,with good mechanical properties.This article was added citrate modified Fe3O4 particle size control growth,the use of orthogonal experiment to optimize the preparation conditions：citrate content n（Fe） /n（citrate）is 50%,pH value of 9 to 10,and the reaction temperature is 60 ℃,the crystallization temperature of 60℃,crystallization time is 40 min.By TEM,VSM,IR,ANSYS simulation software and other testing methods to characterize them respectively.The results showed that citrate can control the growth of Fe3O4 crystallites,and as a dispersant so distributed form colloidal Fe3O4 in water,to ensure that the final form of the particle size distribution of Fe3O4.Nano- Fe3O4 prepared superparamagnetic,nano-magnetic material can be controlled to within the range of 15 nm,magnetic drive Fe3O4/PVA for preparation of composite membrane has a smooth uniform appearance and its magnetic properties with good performance,its dynamic simulation analysis was inosculate to the theoretical analysis.