Effect of salt ions (Na+, Ca2+ and Mg2+) and EOR anionic and nonionic surfactants on the dispersion stability of cellulose nanocrystals

被引：2
作者：
Zheng, Cailing [1 ]
Wang, Zi [1 ]
Zhang, Xinying [1 ]
Wang, Yanping [1 ]
Zhang, Longli [1 ,2 ]
机构：
[1] China Univ Petr East China, Coll Chem & Chem Engn, Qingdao 266580, Shandong, Peoples R China
[2] China Univ Petr East China, State Key Lab Heavy Oil Proc, Qingdao 266580, Shandong, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2024年 / 282卷
基金：
中国国家自然科学基金;
关键词：
Cellulose nanocrystals (CNCs); Dispersion stability; Enhanced oil recovery (EOR); COLLOIDAL STABILITY; ADSORPTION; NANOPARTICLES;
D O I：
10.1016/j.ijbiomac.2024.136761
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The application of cellulose nanocrystals (CNCs) in enhanced oil recovery (EOR) is a developing hotspot. To improve the stability of CNCs in salt environments, the effects of sodium dodecylbenzene sulfonate (SDBS) and polyoxyethylene sorbitan monooleate (Tween 80) on the stability of CNCs in the presence of sodium (Na+), calcium (Ca2+) and magnesium (Mg2+) were investigated. The range of salt ions and the stability mechanism for improving the CNCs stability in the presence of SDBS and Tween 80 were pointed out. SDBS improved the stability of CNCs in the presence of 30-100 mM Na+, 1-2 mM Ca2+ and 2 mM Mg2+, respectively. Tween 80 improved the stability of CNCs in the presence of Na+ <= 300 mM, Ca2+ <= 10 mM and Mg2+ <= 10 mM, respectively. The mechanism was explained by the bridging effect of salt ions, electrostatic effect and spatial stability effect. The combined systems of surfactants (SDBS and Tween 80) with CNCs exhibited strong emulsifying properties, low interfacial tension (0.023 mN/m and 1.85 mN/m), and the ability to alter the wettability of oil wet rocks. This made the combined systems have better oil displacement performance.
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页数：16
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