Stability of Highly Concentrated Water-in-Oil Emulsions with Magnetic Nanoparticles and the Structure of Highly Porous Polymers Formed on Their Basis

Shirokikh, S. A.; Klevtsova, E. O.; Savchenko, A. G.; Koroleva, M. Yu.

doi:10.1134/s1061933x21060120

Cited by 5 publications

(1 citation statement)

References 38 publications

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“…Józefczak and Wlazło 11 found that solid MNPs were strongly adsorbed at the oil–water interface and were able to stabilize the oil–water interfacial film. Shirokikh et al 12 found that the aggregation rate of dispersed phase droplets decreases with the increase of MNP concentration, but most of the unmodified MNPs have the disadvantages of high dosage and high cost. Therefore, to achieve the purpose of use, some scholars began to propose functionalized MNPs to modify the surface of MNPs.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Polymer-Modified Magnetic Nanoparticles on Viscosity Reduction of Heavy Oil Emulsion

Sun,

Hu,

et al. 2024

ACS Omega

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To overcome the problems of large dosage, fast sedimentation, and the unsatisfactory emulsification effect of traditional magnetic nanoparticles, polymer-modified magnetic nanoparticle Co 3 O 4 @HPAM was synthesized as an emulsifier for heavy oil O/W emulsion by modifying the surface of Co 3 O 4 . The composition of Co 3 O 4 @HPAM was characterized by Fourier transform infrared spectroscopy, X-ray diffraction analysis, thermogravimetric analysis, and scanning electron microscopy. Then, the effects of the mass fraction of magnetic nanoparticles before and after modification on the stability and rheology of the emulsion were compared and analyzed. The experiments show that the degree of reduction of the water-separation rate under the action of Co 3 O 4 @HPAM was 13 times higher than that under the action of Co 3 O 4 at the same mass fraction. By using Co 3 O 4 @HPAM, the water separation of the emulsion was only 6.74% at 4 h, while the viscosity reduction was greater than 97% at a mass fraction of 0.04%. Finally, combined with the test results of zeta potential, interfacial tension, contact angle, and oil droplet distribution, the effect mechanism of Co 3 O 4 @HPAM on the viscosity reduction of heavy oil emulsification was investigated. It is found that the polymer-modified magnetic nanoparticles have stronger negative electricity, a larger contact angle, and smaller interfacial tension, while the oil droplets under their action have a smaller radius and a more homogeneous distribution. The research in this paper provides a theoretical basis for the application of magnetic nanoparticles in heavy oil emulsification and viscosity reduction technology.

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Section: Introductionmentioning

confidence: 99%