公开(公告)号：US10604599B2

公开(公告)日：2020-03-31

申请号：US15991937

申请日：2018-05-29

申请人： Nanjing University ,  Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering

发明人： Chendong Shuang ,  Weiwei Zhou ,  Yunshu Wang ,  Aimin Li ,  Qimeng Li ,  Lili Liu ,  Wei Wang ,  Yi Zhang

IPC分类号： C08F6/18 ,  C08F12/08 ,  C08K5/01 ,  C08K5/14 ,  C08K5/23 ,  C08K5/09

摘要： A method for green synthesis of uniform- and large-particle-size polystyrene particles, comprising steps of: prepolymerizing styrene at 70□ to 75□ 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□ to 80□, adding the oil phase to dispersed phase by a constant-pressure device, maintaining the temperature for 2 h, heating to 80±5□ and then maintaining the temperature for 1 h, and heating to 85±5□ 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.

公开(公告)号：US11602729B2

公开(公告)日：2023-03-14

申请号：US16954210

申请日：2018-01-11

申请人： NANJING UNIVERSITY ,  JIANGSU GUOCHUANG ENVIRO-PROTECTION TECHNOLOGY CO., LTD

发明人： Qing Zhou ,  Zhijian Yao ,  Aimin Li ,  Wei Jiao ,  Chendong Shuang ,  Qimeng Li ,  Jie Sun

IPC分类号： B01J20/26 ,  B01J20/22 ,  B01J20/06 ,  C02F1/28 ,  C02F1/48 ,  B01J20/28 ,  B01J20/30 ,  C02F101/10 ,  C02F101/30

摘要： 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° C., and adding the rest of the oil phase solution when the temperature rises to 60° 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 μm, the magnetization of 5-19.5 emu/g and the specific surface area of 210-950 m2/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.