Abstract: The morphology,swelling performance,temperature resistance and plugging performance of a novel double⁃crosslinked structure temperature⁃resistant polymer microsphere were studied by scanning electron microscopy,laser particle size analyzer and microporous membrane filtration experiments.The results show that the original shape of the microspheres is spherical with smooth surface,and the particle size is mainly distributed between 200 nm and 300 nm.The microspheres swell 5 times after swelling for 30 days at 140 ℃ in an aqueous solution with a salinity of 10 000 mg/L.With the swelling time,swelling temperature and microsphere concentration increasing,the plugging characteristics of the microspheres to the microporous membrane is gradually enhanced.The microspheres with the swelling for 30 d at 140 ℃ have the best plugging effect;with the increase of the pore size of the membrane, the microsphere plugging effect is weakened.The microspheres still have good plugging performance after swelling at 140 ℃ for 30 d,indicating that the microspheres have good temperature resistance.

Key words: Crosslinked polymer microspheres, Temperature?resistant； Polymer microspheres； Plugging characteristics； Particle size

摘要： 采用扫描电子显微镜、激光粒度仪和微孔滤膜过滤实验研究了一种双交联结构新型耐温聚合物微球的形态、溶胀性能、耐温性能及封堵性能。结果表明，微球原始形态为表面较为光滑的圆球形，粒径主要分布在200~300 nm，微球在矿化度10 000 mg/L的水溶液中140 ℃下溶胀30 d后约溶胀了5倍。随着溶胀时间、溶胀温度和微球浓度的增加，微球对微孔滤膜的封堵能力逐渐增强，140 ℃下溶胀30 d的微球封堵效果最强；随着滤膜孔径的增大，微球封堵效果减弱。微球在140 ℃下溶胀30 d后依然具有良好的封堵性能，说明微球具有良好的耐温性。

关键词: 交联聚合物微球, 　耐温, 　微孔滤膜, 　封堵特性, 　粒径