交联聚合物微球水化粒径影响因素的分析

采用SEM和动态光散射实验对交联聚合物微球(简称微球)水化粒径及其影响因素进行了分析。实验结果表明,微球初始形态为球形,粒径约为50nm,40℃下水化15d后微球粒径溶胀到300nm;水化时间由1d增至15d时,微球水化后的流体力学直径(Dh)由397.2nm增至最大值487.7nm;微球水化后的粒径随分散体系中微球含量的增加而增大;随水化温度的升高,分散体系中微球的Dh达到最大值的时间缩短;在实验范围内,交联比为1/10000的微球粒径最小,溶胀倍数最大,溶胀程度较高。

Effect Factors for Hydration Particle Size of Crosslinked Polymer Microsphere

Effect factors for hydration particle sizes of the crosslinked polymer microspheres (microsphere for short),which were prepared by inverse microemulsion copolymerization of acrylamide,sodium acrylate and crosslinking monomer and used in crude oil production,were investigated by means of SEM and dynamic light scattering experiments. The experimental results showed that the initial shapes of the microspheres were sphere and their sizes were about 50 nm. At hydration temperature 40 ℃,the sizes of microspheres reached 300 nm after swelling 15 d. The hydrodynamics diameters of the microspheres increased from 397.2 nm to maximum value 487.7 nm with increase of hydration time from 1 d to 15 d,and their hydration particle sizes slightly increased with increase of the microsphere concentration. The hydrodynamics diameter of the microspheres reached a maximum value ahead of time with rise of the hydration temperature. When cross-linking ratio was 1/10 000,hydration particle size of the microsphere was the smallest,its swelling multiple was the biggest and the swelling degree was high.