化学方法加速疏水缔合聚合物的溶解

Accelerating the Dissolution of Hydrophobically Associative Polymer by Cyclodextrin

李玺 罗平亚 叶仲斌 舒政 张健 肖秀婵

LI Xi LUO Pingya YE Zhongbin SHU Zheng ZHANG Jian XIAO Xiuchan

疏水缔合聚合物由于疏水基团间的相互作用，缓慢的溶解速度制约了其在油田上的大规模应用。已有的物理加速溶解方法会造成缔合聚合物溶液的黏度产生不可恢复的损失。基于疏水基团与环糊精的包合作用，在缔合聚合物溶解过程中加入环糊精，研究了环糊精对疏水缔合聚合物溶解性和流变性的影响。结果表明，利用 环糊精对疏水基团的包合作用，加速了缔合聚合物的溶解，且避免了溶液黏度的损失。环糊精对疏水基团的包合改善了缔合聚合物与溶剂的相互作用。随环糊精与疏水基团物质的量之比的增加，缔合聚合物溶解时间呈指数下降。利用环糊精对客体分子的竞争包合特性，通过向缔合聚合物溶液中添加适量的与环糊精具有更强亲和力的非离子表面活性剂可以完全恢复溶液的流变性能。

The poor dissolution of hydrophobically associating polymers caused by the interactions of hydrophobes restricts their popularization and application on oilfields. Irreversible viscosity loss of polymer solution will inevitably occur through the current physical accelerated dissolution modes. Based on the inclusion of cyclodextrins and hydrophobes，cyclodextrin was added in the dissolution process of associating polymer，and the effects of cyclodextrin on the solubility and rheology of hydrophobic associating polymer were studied. The results showed that the inclusion of hydrophobe by cyclodextrin accelerated the dissolution of associating polymer without the loss of polymer solution viscosity. The inclusion of cyclodextrin on hydrophobe improved the interaction between associating polymer and solvent. As the molar ratio of cyclodextrin to hydrophobic group increased，the dissolution time of hydrophobically associating polymer decreased exponentially. Utilizing the competitive inclusion properties of cyclodextrin inclusion complex，the rheological properties of associating polymer solution could be completely restored by adding an appropriate amount of nonionic surfactant with stronger affinity to cyclodextrin.

10.19346/j.cnki.1000-4092.2022.02.023