The crosslink micro-spheres were prepared based on the monomers of acrylamide, crylic acid and the cross-linking agent of N,N'-Methylene bisacrylamide (MBA) by inverse suspension process. Effects of stirring rate, dispersant, cross-linking agent and co-initiator on the polymerization process were studied. The experimental results showed that the greater the dispersant dosage and the stirring rate were, the smaller the micro-spheres would be. The size of micro-spheres would be about 15 μm when stirring rate was 450 r/min and dispersant dosage was 29%. It was also observed that the content of crosslink monomer had great effect on water absorption ratio. When the dosage of cross-linking agent was 0. 1%, the distilled water absorption ratio reached a maximum of 980 g/g, but it has little effect on the size of micro-spheres. Water absorption ratio decreased rapidly in salinity water. The greater the ionic strength was, the more the bibulous rate would decrease. With the decrease of the size of micro-spheres, the bibulous rate would become greater. When the size was about 50 μm,the bibulous rate reached the maximum. When we added initiator AIBN to system, the size of micro-spheres fell from micron level to nanometer level.%以丙烯酸、丙烯酰胺为主要单体,N,N-亚甲基双丙烯酰胺为交联剂,采用反相悬浮聚合法合成出交联微球.研究了搅拌效率、分散剂、交联剂、协同引发剂等参数对聚合工艺的影响.结果表明:分散剂用量越大,转速越高,微球粒径越小；当转速为450 r/min,分散剂用量为29％时,微球粒径为15 μm;当交联剂用量为0.1％时,吸淡水倍率达到最大值980 g/g,但交联剂对粒径影响不大.在矿化水中,交联微球的吸水率迅速下降,离子强度越大,下降幅度越大.随着微球的粒径变小,吸水率越大；当粒径为50 μm左右时,最大吸水率达到极值.加入助引发剂AIBN后,微球粒径由微米级下降至纳米级.
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