Study the influence of various surfactants on the stability of oil-in-water emulsions by optical tweezers

被引：0
作者：
Huang, Ju [1 ]
Li, Linyu [1 ]
Zhu, Ying [1 ]
Xiong, Yan [1 ,2 ]
Shi, Peng [1 ,2 ]
Liu, Shuai [1 ,2 ]
Duan, Ming [1 ,2 ]
机构：
[1] Southwest Petr Univ, Coll Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
[2] Southwest Petr Univ, Oil & Gas Field Appl Chem Key Lab Sichuan Prov, Chengdu, Sichuan, Peoples R China
来源：
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2025年
基金：
中国国家自然科学基金;
关键词：
Oil-in-water (O/W) emulsions; optical tweezers; resins; surfactants; stability; INTERACTION FORCES; IONIC SURFACTANTS; ASPHALTENES; INTERFACE; PROTEIN; SALT; DEMULSIFICATION; STABILIZATION; PARTICLES; FILMS;
D O I：
10.1080/01932691.2025.2452598
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Study on the stability of oil-in-water (O/W) emulsions is significant for breaking O/W emulsions, which is a key problem in oilfield wastewater treatment. So far, the traditional methods for exploring the stability of emulsions are mostly bulk measurements. Here, we report directly observing the sticking propability of pairs of emulsion droplets by optical tweezers to investigate the stability of O/W emulsions at the microscale. It was confirmed that resins in the oil phase and various types of surfactants in the aqueous phase are all beneficial for the stability of O/W emulsions. Besides, the conventional bulk measurements of Zeta potential and interfacial tension were also carried out to study the influence of the above species on the stability of O/W emulsions. The resultant data are well consistent with those obtained from the optical tweezer method (OTM). Our results show that optical tweezer is a new and reliable approach to evaluate the stability of oil-in-water emulsions and it opens up a bright road for exploring the stability of emulsions at microscale.
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页数：9
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