摘要
采用反相乳液聚合法制备了纳微米交联聚丙烯酰胺微球，利用扫描电子显微镜和激光粒度仪对所制备的微球进行表征，并分别考察了乳化剂的种类和配比、乳化搅拌速率对聚合体系稳定性的影响，以及交联剂的加量、离子化程度对微球封堵性能的影响。结果表明：交联聚丙烯酰胺微球球形完整，平均粒径在400nm左右；Span80／Tween80复合乳化剂的HLB为5．3时，聚合体系最稳定；乳化速率大于1200r／min时，稳定性明显提高；交联剂加量越多，长期稳定性越好；离子化程度控制在15％～20％之间为佳。
A nano/micro-crosslinked microsphere is synthesized by inverse emulsion copolymerization. The synthesized microspheres are characterized by SEM and laser particle size analyzer. The factors affecting the stability of the polymerization system, such as the type and the dosage of emulsifier and the emulsification speed, are investigated. The effects of dosage of crosslinking agent and the degree of ionization on the plugging performance of polyacrylamide microspheres are also studied. The results show that the crosslinked polyacrylamide microsphere is a complete sphere with about 400 nm of the average particle diameter. When the HLB value of the composite emulsifier is 5.3, the polymerization system is the most stable. And the stability can be obviously improved when the emulsification speed is above 1 200 r/ min. More dosage of the crosslinking agent leads to better long-term stability. The degree of ionization is preferred to be controlled in the range of 15% -20%.
出处
《现代化工》
CAS
CSCD
北大核心
2015年第8期129-132,共4页
Modern Chemical Industry
关键词
交联聚丙烯酰胺微球
反相乳液聚合
深部调剖
封堵性能
crosslinked polyacrylamide microspheres
inverse emulsion polymerization
deep profile control
plugging performance
