Research progress of modified chitosan magnetic nanomaterials
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摘要: 将壳聚糖改性与磁性材料复合制备得到的改性壳聚糖磁性纳米材料,保留了壳聚糖与金属离子极强螯合能力的特性,并具备较好的再生性,极大扩展了壳聚糖的应用前景。本论文重点介绍了改性壳聚糖磁性纳米材料的制备方法,以及在废水处理、活性物质的固定化、医药医疗等应用领域的最新研究与应用进展,以期对壳聚糖资源的开发利用提供一定的理论支撑。Abstract: The modified chitosan magnetic nanomaterials, which was prepared by the composite of modified chitosan and magnetic materials, retains the strong chelating ability of chitosan with metal ions, and have good regeneration performance. These two properties greatly expand the application prospect of chitosan. This article focuses on the preparation methods of modified chitosan nanomaterials, and the latest research and application progress in wastewater treatment, immobilization of active substances, medicine and medical treatment, etc, which is to provide some theoretical support for the development and utilization of chitosan resources.
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Key words:
- chitosan /
- magnetic materials /
- wastewater treatment /
- drug carrier /
- immobilization
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表 1 壳聚糖的改性方法分类
Table 1. Classification of modification methods for chitosan
Modification method Description Ref. Degradation modification Chemical degradation Degradis performed chemically, which includes acid hydrolysis and oxidation [13-15] Physical
degradationFor physical degradation, including various radiation treatment techniques such as electron beam, gamma rays, ultraviolet, X-rays; also for physical cavitation effects, such as ultrasound, hydrodynamics, resonance, etc [16-18] Enzyme
degradationEfficient degradation under milder conditions, using specific enzymes or non-specific enzymes [19-20] Crosslinking modification Glutaraldehyde Using glutaraldehyde as a crosslinker, chitosan itself was crosslinked, or cross-linked with a modified-cyclodextrin [21-22] Genipin Amantine was cross-linked to chitosan using Kinepin as a cross-linking agent [23] Epichlorohydrin Epichlorohydrin was used as a crosslinking agent, cross-linked graphene oxide to modify chitosan [24] Graft copolymerization modification Free radical initiated grafting Arching copolymerization occurs under cerium ion (Ce4+), persulfate and radiation [27-29] Coupling grafting Including the basic diimidazole method, the Schiff base method and some other conjugate grafting method [30-33] Catalytic grafting Grafting reaction was performed using some catalyst for the initiator [34] Composite modification Composite Often compound with some clay, silicate, all kinds of metal oxides, etc [35-36] -
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