Magnetic Behavior of O-Carboxymethylchitosan Bounded With Iron Oxide Particles
Magnetic Behavior of O-Carboxymethylchitosan Bounded With Iron Oxide Particles
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DOI：
10.1109/tmag.2009.2032518
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发表时间：
2010-01
影响因子：
2.1
通讯作者：
A. Dusza;M. Wojtyniak;N. Nedelko;A. Ślawska-Waniewska;J. Greneche;C. A. Rodrigues;C. Burger;C. Stringari;A. Debrassi
中科院分区：
文献类型：
--
作者：
A. Dusza;M. Wojtyniak;N. Nedelko;A. Ślawska-Waniewska;J. Greneche;C. A. Rodrigues;C. Burger;C. Stringari;A. Debrassi
用原位共沉淀法和包埋法制备了两种磁性壳聚糖衍生物。研究了两种磁性壳聚糖微球的结构和磁性--氧化铁颗粒的形貌以及磁性微球的整体磁性。它已被证明，通过掺入法制备的样品的磁性是大致相同的<$-Fe 2 O3/Fe 3 O 4纳米粒子的粉末，都是由强静磁颗粒间的相互作用占主导地位。反过来，通过原位方法制备的样品更容易受到温度升高的影响（导致在300 K下的主要超顺磁性行为），这与更小的颗粒尺寸和更好的颗粒与壳聚糖分子的分离有关。
Two magnetic chitosan derivatives of O-carboxymethylchitosan bounded with iron oxide particles have been prepared by in situ coprecipitation and incorporation methods. The investigations were focused on structural and magnetic aspects-morphology of iron oxide particles and overall magnetic behavior of these two magnetic chitosan microspheres. It has been shown that the magnetic properties of the sample prepared by the incorporation method are roughly the same as those of a powder of ¿-Fe2O3/Fe3O4 nanoparticles and both are dominated by strong magnetostatic interparticle interactions. In turn, the sample prepared by the in situ method is more susceptible to the temperature increase (resulted in predominant superparamagnetic behavior at 300 K) which is related to smaller particle sizes and better separation of particles with chitosan molecules.