槐糖脂与高活性表面活性剂复配体系的相互作用和界面行为

石油炼制与化工 ›› 2025, Vol. 56 ›› Issue (1): 56-65.

槐糖脂与高活性表面活性剂复配体系的相互作用和界面行为

肖宇,秦冰,雷雪,江建林,侯研博,乔富林

中石化石油化工科学研究院有限公司

收稿日期:2024-03-18 修回日期:2024-09-09 出版日期:2025-01-12 发布日期:2024-12-27
通讯作者: 乔富林 E-mail:qiaofulin.ripp@sinopec.com
基金资助:
生物制剂复合驱油体系开发及应用示范;基于环糊精的寡聚阴离子表面活性剂的合成、其聚集及吸附行为及其对土壤中稠环芳烃的增溶效果研究

INTERACTION AND INTERFACIAL BEHAVIORS OF THE MIXED SYSTEM OF SOPHROLIPIDS WITH HIGH INTERFACIAL ACTIVITY SURFACTANTS

Received:2024-03-18 Revised:2024-09-09 Online:2025-01-12 Published:2024-12-27

摘要/Abstract

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（C₁₂SA、C₁₄SA、C₁₆SA）复配混合体系的分子间相互作用和界面行为。结果表明：随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/C₁₆SA混合体系可有效降低其与稠油的油/水界面张力；随着C₁₆SA摩尔分数（X_C16SA）增大，SL/C₁₆SA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_C16SA>0.2时，SL/C₁₆SA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_C16SA＞0.7时，SL/C₁₆SA混合体系界面活性较好，可用于油田开采领域。

关键词: 槐糖脂, 表面活性剂, 分子间相互作用, 界面行为

Abstract: 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(C₁₂,C₁₄,C₁₆), 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/C₁₆SA 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 C₁₆SA (X_C16SA), 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_C16SA>0.2 for the SL/C₁₆SA 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_C16SA> 0.7, the SL/C₁₆SA hybrid system had the better interfacial activity, which can be used for oil field exploitation.

Key words: sophrolipid, surfactant, intermolecular interaction, interfacial behavior

肖宇秦冰雷雪江建林侯研博乔富林. 槐糖脂与高活性表面活性剂复配体系的相互作用和界面行为[J]. 石油炼制与化工, 2025, 56(1): 56-65.

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