以纳米颗粒为核的支化驱油聚合物合成及性能

Synthesis and performance evaluation of branched flooding polymer with nanoparticles as the core

以氨丙基三乙氧基硅烷修饰纳米SiO 2制备氨基纳米SiO 2,在该基础上,以硝酸铈铵和氨基纳米SiO 2为引发剂,丙烯酰胺、2-丙烯酰胺基-2-甲基丙磺酸为单体,制备了一种以纳米颗粒为核的支化聚合物。通过单因素实验,考察了纳米颗粒种类、纳米颗粒加量、反应体系pH值、硝酸铈铵加量、反应温度、反应时间对于产物溶液黏度的影响,得到了最优的聚合条件。性能评价实验结果表明,与线性聚合物相比,支化聚合物具有更好的抗盐和抗剪切降解能力。

Amino-functionalized nanosilica was prepared from nanosilica modified by aminopropyltriethoxysilane.A branched polymer with nanoparticles as the core was prepared by radical polymerization using acrylamide and 2-acrylamide-2-methylpropanesulfonic acid as monomers,and ammonium cerium nitrate and amino-functionalized nanosilica as initiators.The effects of nanoparticle type,nanoparticle amount,pH,ammonium cerium nitrate amount,reaction temperature and reaction time on product properties were investigated through single factor experiments,and the optimal polymerization conditions were obtained.The results of performance evaluation experiments indicate that the branched polymer has better properties of salt-resistance and shear-tolerance compared with linear polymer.