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首页> 外文期刊>Russian Journal of Physical Chemistry >Preparation and adsorption properties of magnetic CoFe2O4-chitosan composite microspheres
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Preparation and adsorption properties of magnetic CoFe2O4-chitosan composite microspheres

机译：磁性CoFe2O4-壳聚糖复合微球的制备及吸附性能

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摘要

Magnetic chitosan microspheres made from novel polymer materials show outstanding applied characteristics. Magnetic chitosan microspheres are rather cheap, non-toxic, tasteless, alkali resistant, corrosion resistant, easily degradable, easily recyclable, and so on. It can be widely used in many fields. In this paper, magnetic CoFe2O4/chitosan core-shell microspheres are prepared by means of emulsification cross-linking technique using CoFe2O4 as core and glutaric dialdehyde as crosslinking agent. The results demonstrated that the different calcining temperature of magnetic (CoFe2O4) particles, CoFe2O4/chitosan ratio and stirring time of the suspension medium are the most effective parameters that control the size, size distribution, morphology and magnetism of the described microspheres. Finally, the size, morphology and chemical structure of the prepared materials are studied by different methods. The results show that the optimal calcination temperature of magnetic particles is 700A degrees C, the optimal ratio of CoFe2O4/chitosan is 1: 1, ultrasonic dispersion time is 30 min. The prepared chitosan magnetic microspheres have small size and are well dispersed when the stirring time is 3 h. The prepared magnetic chitosan microspheres are well shaped spheres with a diameter from 1 to 50 mu m, in which CoFe2O4 particles are dispersed uniformly. The magnetic chitosan microspheres show excellent magnetic response and have good adsorption characteristics.
机译：由新型聚合物材料制成的磁性壳聚糖微球具有出色的应用特性。磁性壳聚糖微球价格便宜，无毒，无味，耐碱，耐腐蚀，易于降解，易于回收等。它可以广泛用于许多领域。以CoFe2O4为核，戊二醛为交联剂，采用乳化交联技术制备了磁性CoFe2O4 /壳聚糖核壳微球。结果表明，磁性（CoFe2O4）颗粒的不同煅烧温度，CoFe2O4 /壳聚糖比和悬浮介质的搅拌时间是控制上述微球的尺寸，尺寸分布，形态和磁性的最有效参数。最后，用不同的方法研究了所制备材料的尺寸，形态和化学结构。结果表明，磁性颗粒的最佳煅烧温度为700A，CoFe2O4 /壳聚糖的最佳比例为1：1，超声分散时间为30 min。制备的壳聚糖磁性微球尺寸小，搅拌时间为3 h时分散良好。制备的磁性壳聚糖微球是直径为1至50μm的形状良好的球，其中CoFe 2 O 4颗粒均匀地分散在其中。磁性壳聚糖微球显示出优异的磁响应并具有良好的吸附特性。

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