为解决液液萃取过程中溶剂损失及两相返混问题 ,研究了相转化法溶剂固定化的制备技术。借鉴已有的微胶囊技术 ,选用聚砜 (PS)为膜材料、磷酸三丁酯 (TBP)为芯材的体系 ,用锐孔 -凝固浴法制备出球腔内包覆溶剂 TBP的聚砜微胶囊。讨论了聚合物溶液组成、过孔速度等因素对微胶囊的形态及结构的影响 ,并根据传质实验讨论其稳定性。结果表明 :聚砜质量分数在 10 %～ 15 %、 TBP质量分数为聚砜的 1.2～ 2倍的配比下 ,过孔速度控制在 3 m L.min-1左右 ,体积比为 1:1的乙醇 -水溶液为凝固浴制得的溶剂固定化微胶囊 ,其传质稳定性优于浸渍 TBP的 PS中空微球 ,4次重复性实验的传质效果基本没有变化 In order to solve the problem of solvent loss and two-phase backmixing in liquid-liquid extraction, the preparation technology of solvent immobilization by phase inversion was studied. Draw lessons from the existing microcapsule technology, choose polysulfone (PS) as the membrane material, tributylphosphate (TBP) as the core material system, with a sharp hole - coagulation bath method for the preparation of the ball cavity coated solvent TBP polysulfone Microcapsules. The effects of polymer solution composition, via velocity and other factors on the morphology and structure of microcapsules were discussed. The stability of microcapsules was discussed based on mass transfer experiments. The results showed that when the mass fraction of polysulfone is 10% -15% and the mass fraction of TBP is 1.2-2 times that of polysulfone, the via velocity is controlled at about 3 m L.min-1 and the volume ratio is 1: 1 Ethanol-water solution was immobilized in a coagulation bath, the mass transfer stability was better than that of PS hollow microspheres impregnated with TBP. The mass transfer efficiency of four replicate experiments remained almost unchanged