石油化工2025，Vol.54Issue(11)：1608-1615,8.DOI:10.3969/j.issn.1000-8144.2025.11.009
鼠李糖脂-水凝胶微球复合体系构建及性能评价
Construction and performance evaluation of rhamnolipid-hydrogel microsphere composite system
摘要
Abstract
Using cellulose nanocrystals(CNC),dimethylaminoethyl methacrylate,glycidyl methacrylate,and hexafluorobutyl acrylate as raw materials,a hydrogel microsphere with alkali resistance and a controllable particle size was synthesized through covalent functional modification.The hydrogel microspheres were characterized by methods such as FTIR,XRD,and laser particle size analysis.Their swelling ratio and erosion resistance were investigated,and the interfacial activity,Zeta potential,and wettability of the rhamnolipid-hydrogel microsphere composite system were analyzed.The experimental results indicate the successful grafting of the alkali-resistant hexafluorobutyl group onto CNC,with controllable particle sizes of the hydrogel microspheres.In an alkaline environment,the swelling ratio reaches approximately 1.0 to 1.2.Notably,6 μm hydrogel microspheres exhibit a significant retention effect in rock cores and possess excellent erosion resistance.The interfacial tension of the 0.30%(w)rhamnolipid-2%(w)hydrogel microsphere composite system can reach 10-3 mN/m within a pH range from 9 to 12.The absolute value of the zeta potential exceeds 32 within a pH range from 8 to 14.The wettability transitions from oil-wet to water-wet within a pH range from 8 to 12.Under alkaline conditions,this system exhibits ultra-low interfacial tension,stability,and wettability reversal capabilities,thereby enhancing the adaptability of profile control and flooding within a wide pH window in reservoirs after ternary composite flooding.关键词
生物表面活性剂/水凝胶/耐碱性/三元复合驱后Key words
biosurfactant/hydrogel/alkali resistance/after ternary composite flooding分类
能源科技引用本文复制引用
石芳,金韦彬,吴景春,王子言,宋广庆,沈毅..鼠李糖脂-水凝胶微球复合体系构建及性能评价[J].石油化工,2025,54(11):1608-1615,8.基金项目
东北石油大学引导创新基金项目(2022YDL-03). （2022YDL-03）
