摘要
通过测定表面张力、油水界面张力、接触角及使用原子力显微镜等技术手段,分别研究了生物基表面活性剂槐糖脂(SL)与3种不同烷基链长高界面活性表面活性剂(C_(12)SA、C_(14)SA、C_(16)SA)复配混合体系的分子间相互作用和界面行为。结果表明:随着高界面活性表面活性剂的烷基链长增加,混合体系中表面活性剂分子间协同作用逐渐增强;SL C 16 SA混合体系可有效降低其与稠油的油水界面张力;随着C 16 SA摩尔分数(X C_(16)SA)增大,SL/C_(16)SA混合体系的浊度逐渐降低、胶束粒径逐渐减小、体系对油性表面的润湿反转能力逐渐增强,且对多孔油性基底的渗透速率更高;同时,当X C_(16)SA>0.2时,SL/C_(16)SA混合体系胶束表面电荷密度降低,体系Zeta电位绝对值减小,沉积形成的颗粒尺寸逐渐增大;当X C_(16)SA>0.7时,SL/C_(16)SA混合体系界面活性较好,可用于油田开采领域。
The intermolecular interactions and interfacial behaviours of the bio-based surfactant sophrolipid(SL)and three high interfacial activity surfactants(SA)with different alkyl chain lengths,dodecyl,tetradecyl and hexadecyl(C_(12),C_(14),C_(16)),in a mixed system were investigated from the aspects of surface tension,oil water interfacial tension,contact angle and atomic force microscopy,respectively.The results showed that the intermolecular synergistic interactions of the mixed SL SA systems were gradually enhanced with the increase of the alkyl chain length of the SA.The mixed SL C 16 SA systems can effectively reduce the oil water interfacial tension between the system and the victorious thick oil when mixed with sophrolipid.With the increase of the molar fraction of C_(16)SA(X C_(16)SA),the turbidity of the mixed system was gradually reduced,the particle size of the aggregates formed by the surfactant in the water was gradually reduced,the wetting and inversion ability of the system on the oily surface was enhanced,and the penetration rate of the system on the porous oily substrate was faster.When X C_(16)SA>0.2 for the SL/C_(16)SA hybrid system,the micelle surface charge density decreases,the absolute value of the zeta potential decreases,and the size of the particles formed by deposition gradually increases,and when X C_(16)SA>0.7,the SL/C_(16)SA hybrid system had the better interfacial activity,which can be used for oil field exploitation.
作者
肖宇
秦冰
雷雪
江建林
侯研博
乔富林
Xiao Yu;Qin Bing;Lei Xue;Jiang Jianlin;Hou Yanbo;Qiao Fulin(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083)
出处
《石油炼制与化工》
CAS
北大核心
2025年第1期56-65,共10页
Petroleum Processing and Petrochemicals
基金
国家重点研发计划资助项目(2022YFC2105205)
国家自然科学基金资助项目(22102217)。
关键词
槐糖脂
表面活性剂
分子间相互作用
界面行为
sophrolipid
surfactant
intermolecular interaction
interfacial behavior
