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

作　　者：Wenting Fan Fang Zhao Ming Chen Jian Li Xuhong Guo 

机构地区：[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

出　　处：《Chinese Journal of Chemical Engineering》2023年第7期85-91,共7页中国化学工程学报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(21808059);the Fundamental Research Funds for the Central Universities(JKA01221712).

摘　　要：A new microreactor with continuous serially connected micromixers(CSCM)was tailored for the coprecipitation process to synthesize Fe_(3)O_(4) 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.Fe_(3)O_(4) 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 

分 类 号：TB383.1[一般工业技术—材料科学与工程]