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Potential application of novel amphiphilic Janus-SiO2 nanoparticles stabilized O/W/O emulsion for enhanced oil recovery.
- Source :
-
Colloids & Surfaces A: Physicochemical & Engineering Aspects . Aug2021, Vol. 622, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- The Janus nanoparticles stabilized Pickering emulsions showed great application potential in various fields, including enhanced oil recovery (EOR). In this study, the amphiphilic Janus-SiO 2 nanoparticles (Janus-C12) are successfully synthesized by the Pickering emulsion method and characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), ζ-potential and contact angle measurements. The phase inversion from oil-in-water (O/W), multiple oil-in-water-oil (O/W/O) emulsion, to water-in-oil (W/O) emulsions was observed with the delicate control for the modification degrees of Janus-C12. The possible emulsification mechanisms for various Janus-C12 stabilized emulsions were proposed. The multiple O/W/O emulsion stability in harsh conditions and the influence factors (nanoparticles concentration, water/oil volume ratio and NaCl concentration) were studied systematically. Moreover, the Janus-C12–79% stabilized multiple O/W/O Pickering emulsions exhibited excellent EOR performance (additional oil recovery of 27.2%) in core flooding tests, and the possible EOR mechanism was explored via microscopic visualization experiments. [Display omitted] • Several amphiphilic Janus SiO 2 nanoparticles (Janus-C12) were synthesized. • The hydrophile-lipophile balance of Janus-C12 was accurately controlled. • The individual Janus-C12-79% could generate multiple O/W/O Pickering emulsions. • The O/W/O Pickering emulsions showed high displacement and great sweep efficiency. • Remarkable EOR performance was achieved by the O/W/O Pickering emulsion flooding. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09277757
- Volume :
- 622
- Database :
- Academic Search Index
- Journal :
- Colloids & Surfaces A: Physicochemical & Engineering Aspects
- Publication Type :
- Academic Journal
- Accession number :
- 150521134
- Full Text :
- https://doi.org/10.1016/j.colsurfa.2021.126658