摘要
以三氯化铬为芯材、聚丙烯酰胺为壁材,利用反相悬浮聚合和溶剂蒸发法制备了缓释型Cr（Ⅲ）微胶囊,对Cr（Ⅲ）微胶囊的粒径分布进行了测定,并在模拟环境下对Cr（Ⅲ）微胶囊的缓释性能和成胶性能进行了评价.实验结果表明,经1,2,3次包裹的Cr（Ⅲ）微胶囊的粒径分布主要集中在500～ 700 μm,最大释放率为78％;Cr（Ⅲ）交联剂经包裹后具有明显的缓释效果,与包裹前相比,部分水解聚丙烯酰胺溶液体系的成胶时间明显延长,可由包裹前的20 h延长至50 h;可以通过控制包裹次数和合成聚丙烯酰胺壁材所用交联剂的用量来调节成胶时间.
Controlled release microcapsules,which could be used in heightening the efficiency of tertiary oil recovery,with chromium trichloride（Cr（Ⅲ） as the core material and polyacrylamide as the wall material were prepared by inverse suspension polymerization and solvent evaporation.The particle size distribution of the microcapsules was determined.The controlled release property and the gelation property of the microcapsules were investigated in a simulation environment.According to the particle size tests of the microcapsules,Cr（Ⅲ） release curve in water and Cr（Ⅲ）/HPAM（partially hydrolyzed polyacrylamide） apparent viscosity curve,it was found that the microcapsule particle size was mainly in the range of 500-700 μm,the maximum release rate was 78％,and the gelation time was enlarged from 20 h to 50 h.The slow release effect of the encapsulated crosslinking agent was obvious.The gelation time can be adjusted by controlling the encapsulating times and crosslinking agent dosage used in the synthesis of the polymer wall material.
出处
《石油化工》
CAS
CSCD
北大核心
2013年第12期1378-1382,共5页
Petrochemical Technology
关键词
溶剂蒸发法
微胶囊
延迟交联
缓释性能
成胶性能
三氯化铬
聚丙烯酰胺
solvent evaporation method
microcapsules
delayed crosslinking
controlled release property
gelation property
chromium trichloride
polyacrylamide
