Magnetic particles coated with chitosan-based hydrogel were prepared and characterized by infrared spectroscopy, thermal analysis, atomic force microscopy (AFM), energy dispersive X-ray (EDX), wide angle X-ray diffraction (WAXD) and by vibrating sample magnetometry. A polyelectrolyte complex of chitosan (CH) and Sterculia striata gum (CHG) was employed as a coating. FT-IR analysis of the hydrogel obtained revealed the presence of main characteristic bands of CH, CHG and magnetite (Fe₃O₄). The thermograms showed a moderate efficiency of magnetite incorporation (26.0%) in the hydrogel, as well as evidence of interactions between functional groups of magnetite and biopolymers. Patterns of X-ray diffraction showed the presence of magnetite in the hydrogel with saturation magnetization of 36.5 emu g⁻¹ and crystal average size of 20.8 nm. The hydrogel was found to present a negatively charged outer surface. EDX and AFM revealed that Fe₃O₄ nanoparticles were aggregated, forming large clusters. The CH /CHG hydrogel was shown to be suitable for magnetite coating, enabling its future application such as a drug carrier and a water remediation agent.

制备了涂覆有壳聚糖基水凝胶的磁性颗粒，并通过红外光谱，热分析，原子力显微镜（AFM），能量色散X射线（EDX），广角X射线衍射（WAXD）和振动样品磁强分析对其进行了表征。壳聚糖（CH）和条纹状恒胶（CHG）的聚电解质复合物用作涂层。所得水凝胶的FT-IR分析表明存在CH，CHG和磁铁矿（Fe ₃ O ₄）。热谱图显示水凝胶中磁铁矿掺入的中等效率（26.0％），以及磁铁矿官能团和生物聚合物之间相互作用的证据。X射线衍射图显示水凝胶中存在磁铁矿，饱和磁化强度为36.5 emu g ^-1，晶体平均尺寸为20.8 nm。发现水凝胶呈现带负电的外表面。EDX和AFM显示Fe ₃ O ₄纳米颗粒聚集，形成大簇。CH / CHG水凝胶显示适用于磁铁矿涂层，使其能够在未来的应用中用作药物载体和水修复剂。