Nanjing University

Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering

Jiangsu Guochuang Enviro-protection Technology Co., Ltd

Qimeng Li

Aimin Li

Chendong Shuang

Wei Dong Wang

Qing Zhou

Yi Zhang

Jie Sun

Weiwei Zhou

Zhijian Yao

Wei Jiao

Yunshu Wang

Lili Liu

A magnetic polymer adsorption material, preparation method and use thereof, which relate to the field of magnetic polymer materials. The preparation method comprises: (1) preparing magnetic nanoparticles; (2) dissolving the magnetic nanoparticles in a pore-forming agent, adding N-vinylpyrrolidone, divinylbenzene and an initiator respectively, and mixing uniformly; (3) adding an emulsifier and a dispersant into an aqueous solution; adding a part of the oil phase solution prepared in step (2) at the temperature below 60&#xb0; C., and adding the rest of the oil phase solution when the temperature rises to 60&#xb0; C. or above, reacting with stirring, precipitating and filtering the reacted solution, washing and drying the precipitate, and finally obtaining the magnetic polymer adsorption material. The material has the particle size of 2-100 &#x3bc;m, the magnetization of 5-19.5 emu/g and the specific surface area of 210-950 m/g, and can be applied to the adsorption of inorganic and organic matters in solutions, the controlled release of inorganic and organic matters, and the separation of different substances.

Magnetic polymer adsorption material, preparation method therefor and application thereof

A method for green synthesis of uniform- and large-particle-size polystyrene particles, comprising steps of: prepolymerizing styrene at 70&#x25a1; to 75&#x25a1; for 1 h to 6 h in advance while stirring, adding divinylbenzene dissolved with initiators to the styrene, and stirring for 10 min to 30 min to obtain oil phase; heating lactic acid or an aqueous solution of lactic acid to 70&#x25a1; to 80&#x25a1;, adding the oil phase to dispersed phase by a constant-pressure device, maintaining the temperature for 2 h, heating to 80&#xb1;5&#x25a1; and then maintaining the temperature for 1 h, and heating to 85&#xb1;5&#x25a1; and then maintaining the temperature for 3 h to 6 h, to obtain polystyrene particles with a uniform particle size ranging from 0.7 mm to 2.0 mm.

Method for green synthesis of uniform- and large-particle-size polystyrene particles

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Nanjing, China

Qimeng Li