SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 59 ›› Issue (7): 85-91.DOI: 10.1016/j.cjche.2022.12.008

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An efficient microreactor with continuous serially connected micromixers for the synthesis of superparamagnetic magnetite nanoparticles

Wenting Fan1, Fang Zhao1, Ming Chen1, Jian Li1, Xuhong Guo1,2   

  1. 1. State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2. International Joint Research Center of Green Energy Chemical Engineering, Shanghai 200237, China
  • Received:2022-08-21 Revised:2022-12-23 Online:2023-10-14 Published:2023-07-28
  • Contact: Fang Zhao,E-mail:fzhao1@ecust.edu.cn;Xuhong Guo,E-mail:guoxuhong@ecust.edu.cn
  • Supported by:
    We gratefully thank the financial support from the National Natural Science Foundation of China (21808059) and the Fundamental Research Funds for the Central Universities (JKA01221712).

An efficient microreactor with continuous serially connected micromixers for the synthesis of superparamagnetic magnetite nanoparticles

Wenting Fan1, Fang Zhao1, Ming Chen1, Jian Li1, Xuhong Guo1,2   

  1. 1. State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2. International Joint Research Center of Green Energy Chemical Engineering, Shanghai 200237, China
  • 通讯作者: Fang Zhao,E-mail:fzhao1@ecust.edu.cn;Xuhong Guo,E-mail:guoxuhong@ecust.edu.cn
  • 基金资助:
    We gratefully thank the financial support from the National Natural Science Foundation of China (21808059) and the Fundamental Research Funds for the Central Universities (JKA01221712).

Abstract: A new microreactor with continuous serially connected micromixers (CSCM) was tailored for the coprecipitation process to synthesize Fe3O4 nanoparticles. Numerical simulation reveals that the two types of CSCM microchannels (V-typed and U-typed) proposed in this work exhibited markedly better mixing performances than the Zigzag and capillary microchannels due to the promotion of Dean vortices. Complete mixing was achieved in the V-typed microchannel in 2.7 s at an inlet Reynolds number of 27. Fe3O4 nanoparticles synthesized in a planar glass microreactor with the V-typed microchannel, possessing an average size of 9.3 nm and exhibiting superparamagnetism, had obviously better dispersity and uniformity and higher crystallinity than those obtained in the capillary microreactor. The new CSCM microreactor developed in this work can act as a potent device to intensify the synthesis of similar inorganic nanoparticles via multistep chemical precipitation processes.

Key words: Microreactor, Continuous serially connected micromixers, Mixing, Nanoparticles

摘要: A new microreactor with continuous serially connected micromixers (CSCM) was tailored for the coprecipitation process to synthesize Fe3O4 nanoparticles. Numerical simulation reveals that the two types of CSCM microchannels (V-typed and U-typed) proposed in this work exhibited markedly better mixing performances than the Zigzag and capillary microchannels due to the promotion of Dean vortices. Complete mixing was achieved in the V-typed microchannel in 2.7 s at an inlet Reynolds number of 27. Fe3O4 nanoparticles synthesized in a planar glass microreactor with the V-typed microchannel, possessing an average size of 9.3 nm and exhibiting superparamagnetism, had obviously better dispersity and uniformity and higher crystallinity than those obtained in the capillary microreactor. The new CSCM microreactor developed in this work can act as a potent device to intensify the synthesis of similar inorganic nanoparticles via multistep chemical precipitation processes.

关键词: Microreactor, Continuous serially connected micromixers, Mixing, Nanoparticles