增溶改性疏水缔合聚合物的溶解机理及性能

Dissolution mechanism and properties of solubilizing modifiedhydrophobic association polymer

目的疏水缔合聚合物的溶解性制约了在油气开采领域的应用。为了满足油气开采的需要和实现低成本化,研制了疏水缔合聚合物APO,并通过主客体包合技术实现聚合物的增溶改性。方法通过对聚合物结构的设计,提升聚合物的性能,以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和疏水单体十八烷基聚氧乙烯甲基丙烯酸酯(OEMA)为原料,采用自由基水溶液聚合的方法,合成了疏水缔合聚合物APO,再利用β-环糊精独特的空腔结构进行主客体包合作用来提高其溶解性能。结果25℃下,β-环糊精与聚合物APO的物质的量比为2∶1时,溶解时间由85 min缩短至45 min,聚合物APO在一价及二价盐水中粒径分别降低19.59%和11.50%。结论该聚合物具有好的耐盐性能,β-环糊精能促进聚合物APO的溶解性,减少聚合物用量,实现油气开采的低成本化。

Objective The solubility of hydrophobic association polymer restricts its application in oil and gas exploitation.In order to meet the needs of oil and gas exploitation and achieve low cost,the hydrophobic association polymer APO was developed,and the solubility modification of the polymer was realized by host guest inclusion technology.Methods The performance of hydrophobic association polymer APO can be improved through the design of polymer structure.APO was synthesized by free radical aqueous solution polymerization using AM,AMPS,and OEMA as raw materials,and the unique cavity structure ofβ-cyclodextrin was used to improve its solubility by host and guest package cooperation.Results Underβ-cyclodextrin to APO ratio of 2∶1 the dissolution time was reduced from 85 min to 45 min at 25℃,and the particle size of APO was reduced by 19.59%and 11.50%in monovalent and divalent saline,respectively.Conclusions The polymer has good salt resistance,β-cyclodextrin can promote the solubility of APO,reduce the amount of polymer,and realize the low cost of oil and gas extraction.