来源：JOURNAL OF COLLOID AND INTERFACE SCIENCE ，OCT 15 2003

摘要：Nanosized BaSO4 particles, about 15 nm in size, were synthesized successfully by a membrane reactor at the aids of additives, in which Na2SO4 solutions were added into BaCl2 solutions gradually through the micropores of ultrafiltration membranes to control the saturation ratio, subsequently the nucleation and growth rates. The effects of additives species, additives concentrations, and membranes molecular weight cut-off (MWCO) on the particle morphology, along with the formation processes of particles, were investigated. CaCO3 nanoparticles of 30-60 nm in size were also prepared by the reactor. The results revealed that the addition of methyl alcohol, ethanol etc. favor the synthesis of nanoparticles with small size. The particles size decreases with the increase in ethanol concentrations. With the increase in membrane MWCO, the products tend from nanoparticles towards aggregates. reserved.