[3] [3] WANG Y S, MOO Y X, CHEN C P, et al. Fast precipitation of uniform CaCO3 nanospheres and their transformation to hollow hydroxyapatite nanospheres［J］. Journal of Colloid and Interface Science, 2010, 352(2): 393-400.

[4] [4] WANG C Y. Control the polymorphism and morphology of calcium carbonate precipitation from a calcium acetate and urea solution［J］. Materials Letters, 2008, 62(16): 2377-2380.

[5] [5] WANG Y W, KIM Y Y, STEPHENS C J, et al. In situ study of the precipitation and crystallization of amorphous calcium carbonate (ACC)［J］. Crystal Growth & Design, 2012, 12(3): 1212-1217.

[7] [7] KASHCHIEV D, VAN ROSMALEN G M. Review: nucleation in solutions revisited［J］. Crystal Research and Technology, 2003, 38(78): 555-574.

[8] [8] SPANOS N, KOUTSOUKOS P G. Kinetics of precipitation of calcium carbonate in alkaline pH at constant supersaturation. spontaneous and seeded growth［J］. The Journal of Physical Chemistry B, 1998, 102(34): 6679-6684.

[9] [9] HUANG H, TOIT H D, BESENHARD M O, et al. Continuous flow synthesis of ultrasmall gold nanoparticles in a microreactor using trisodium citrate and their SERS performance［J］. Chemical Engineering Science, 2018, 189: 422-430.

[10] [10] BANNOCK J H, KRISHNADASAN S H, NIGHTINGALE A M, et al. Continuous synthesis of device-grade semiconducting polymers in droplet-based microreactors［J］. Advanced Functional Materials, 2013, 23(17): 2123-2129.

[11] [11] HORIE T, SUMINO M, TANAKA T, et al. Photodimerization of maleic anhydride in a microreactor without clogging［J］. Organic Process Research & Development, 2010, 14(2): 405-410.

[12] [12] KUHN S, HARTMAN R L, SULTANA M, et al. Teflon-coated silicon microreactors: impact on segmented liquid-liquid multiphase flows［J］. Langmuir: the ACS Journal of Surfaces and Colloids, 2011, 27(10): 6519-6527.

[13] [13] ROBERTSON K, FLANDRIN P B, KLAPWIJK A R, et al. Design and evaluation of a mesoscale segmented flow reactor (KRAIC)［J］. Crystal Growth & Design, 2016, 16(8): 4759-4764.

[14] [14] WANG K, WANG Y J, CHEN G G, et al. Enhancement of mixing and mass transfer performance with a microstructure minireactor for controllable preparation of CaCO3 nanoparticles［J］. Industrial & Engineering Chemistry Research, 2007, 46(19): 6092-6098.

[15] [15] DONG C, ZHANG J S, WANG K, et al. Micromixing performance of nanoparticle suspensions in a micro-sieve dispersion reactor［J］. Chemical Engineering Journal, 2014, 253: 8-15.

[17] [17] XU J H, LUO G S, CHEN G G, et al. Experimental and theoretical approaches on droplet formation from a micrometer screen hole［J］. Journal of Membrane Science, 2005, 266(1/2): 121-131.

[19] [19] CHEN G G, LUO G S, LI S W, et al. Experimental approaches for understanding mixing performance of a minireactor［J］. AIChE Journal, 2005, 51(11): 2923-2929.

[20] [20] STONE Z B, STONE H A. Imaging and quantifying mixing in a model droplet micromixer［J］. Physics of Fluids, 2005, 17(6): 063103.

[22] [22] WANG Y J, ZHANG C L, BI S W, et al. Preparation of ZnO nanoparticles using the direct precipitation method in a membrane dispersion micro-structured reactor［J］. Powder Technology, 2010, 202(1/2/3): 130-136.

[23] [23] KISS A, FEKETE E, PUKNSZKY B. Aggregation of CaCO3 particles in PP composites: effect of surface coating［J］. Composites Science and Technology, 2007, 67(7/8): 1574-1583.

[24] [24] YOU L, CAO J X, LIU F. A novel microchannel synthesis strategy for continuous fabrication of nanosized γ-CuI and their photocatalytic performance［J］. Industrial & Engineering Chemistry Research, 2019, 58(25): 10941-10950.