Magnetic polymer/carbon-based microsphere material with core-shell structure and preparation method thereof

Abstract

The invention belongs to the field of advanced nano composite materials, and relates to a magnetic polymer / carbon-based microsphere material with a core-shell structure and a preparation method thereof. The preparation method comprises the steps of: by adopting a sol-gel chemical synthesis method, in an alcohol water phase, in the presence of an alkali catalyst, wrapping polymer resin macromolecule layer outside a magnetic nano particle to obtain a magnetic macromolecule microsphere with a core-shell structure, carbonizing the polymer resin macromolecule layer through high temperature roasting to obtain a magnetic carbon-based microsphere material with the core-shell structure; adding a macromolecule surfactant during preparation, removing a surfactant by carbonizing through roasting to obtain a magnetic carbon-based microsphere material with a cavity, which is of a core-shell structure. The composite microsphere has stronger magnetic responsiveness, and the surface of the composite microsphere can be further functionalized and a large quantity of hydrophobic substances are absorbed; the magnetic microsphere material with the cavity, which is of a core-shell structure, can be used in a nano reactor, drug sustained release, and large-capacity adsorption and separation. The preparation method is simple, is easily available in raw materials, and suitable for amplified production.

Description

technical field [0001] The invention belongs to the field of advanced nanocomposite materials and nanotechnology, and specifically relates to a magnetic polymer / carbon-based microsphere material with a core-shell structure and a preparation method thereof. Background technique [0002] In recent years, core-shell composite microspheres have become a new type of composite material with broad application prospects because they can simultaneously utilize the advantages of their core and shell layers. According to research reports, composite microspheres that use magnetic materials as the core layer and polymeric polymers or carbon as the shell layer, because they combine the magnetic responsiveness of magnetic materials and the characteristics of easy functionalization of polymeric polymers or carbon shells Hydrophobicity has broad application prospects in adsorption, separation, catalysis, etc. Among them, the magnetic core-shell microsphere material with a cavity structure ca...

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Problems solved by technology

[0003] In the preparation of magnetic carbon-based materials disclosed in the prior art, most of the magnetic carbon-based materials use sugars such as glucose and sucrose as carbon sources (Shouhu Xuan, Lingyun Hao, Wanquan Jiang, Xinglong Gong, YuanHu and Zuyao Chen. Nanotechnology 2007,18,035602), the synthesis of magnetic carbon-based materials was realized by hydrothermal synthesis, and the obtained composite materials had the following defects and deficiencies: easy adhesion, inhomogeneity, poor dispersion, difficulty in controlling the thickness of the wrapped shell, wrapping thinner, etc.

Some studies have reported the preparation of hollow carbon sphere materials (An-Hui Lu, *Tao Sun, Wen-Cui Li, Qiang Sun, Fei Han, Dong-Hai Liu, and Yue Guo.Angew.Chem.Int.Ed.2011 , 50, 11765-11768; An-Hui Lu, *Wen-Cui Li, Guang-Ping Hao, Bernd Spliethoff, Hans-Josef Bongard, Bernd Bastian Schaack, and Ferdi Sch_th.Angew.Chem.Int.Ed.2010,49 ,1615-1618;Antonio B.Fuertes,*Patricia Valle-Vigo′n and Marta Sevilla.Chem.Commun.,2012,48,6124–6126;Rui Liu,Shannon M.Mahurin,Chen Li,Raymond R.Unocic, Juan C.Idrobo, Hongjun Gao, Stephen J.Pennycook, and Sheng Dai.Angew.Chem.Int.Ed.2011,50,6799-6802), but the preparation method steps are cumbersome, especially the template that needs to be sacrificed is cost, and it is difficult to achieve separation and recycling in applications such as adsorption, separation, and catalysis; therefore, the development of magnetic hollow carbon spheres that can achieve convenient separation and recovery has become the focus of researchers in this field. So far, no one-step method has been used. A report on the synthesis of magnetic carbon-based microspheres with a hollow core-shell structure

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