聚丙烯酸–丙烯酰胺交联微球的制备及吸水性能

以丙烯酸(AA)、丙烯酰胺(AM)作为单体,N,N–亚甲基丙烯酰胺(MBA)作为交联剂,利用反向悬浮聚合法制备聚丙烯酸–丙烯酰胺(PAA–AM)交联微球,研究了单体配比、交联剂用量、分散剂浓度、搅拌速度、AA中和度对交联微球吸水性能的影响。结果表明,当单体中AM的质量分数为60%、交联剂用量为1%、AA中和度为80%、分散剂浓度为1%、搅拌速度为350 r/min,交联微球的吸水倍率分别达到最大值450.77,426.83,426.83,426.83,424.23 g/g。

Preparation and Water Absorption Properties of Crosslinked Microspheres of PAA-AM

The crosslink micro-spheres were prepared based on the monomers of acrylamide (AM),acrylic acid and the cross-linking agent of N,N–Methylene bisacrylamide by inverse suspension process. Effects of monomer ratio,content of crosslinking agent,dispersant concentration,stirring rate and neutralization degree of acrylic acid on the water absorption of crosslink micro-spheres were studied. The experimental results show that the dosage of AM 60%,dosage of cross-linking agent 1%,neutralization degree of acrylic acid 80%,dispersant concentration 1% and stirring speed 350 r/min,water absorption reach the maximum value 450.77,426.83,426.83,426.83,424.23 g/g respectively.