Efficient preparation of amphiphilic particles and analysis of their application prospects in oil recovery

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Abstract In view of the poor ability of nanoparticles to reduce the oil-water interface and emulsify in the displacement process, Janus nano-SiO₂ with amphiphilic structure was successfully prepared by asymmetric modification of nano-SiO₂ through pickering lotion interface protection method. Through verification, the lipophilic modifier hexadecyl trimethoxysilane was successfully introduced, and almost all of the nano-SiO₂ was successfully protected by paraffin during the preparation process, and amphiphilic Janus nano-SiO₂ was successfully prepared. By this method, Janus nano-SiO₂ can be efficiently and simply prepared in large quantities, providing a basis for large-scale application needs in the oil field. Janus nano-SiO₂ has stronger emulsifying ability and stability compared to hydrophilic and lipophilic nano-SiO₂, so its oil carrying capacity is stronger. In the case of high water cut in the reservoir, the lotion droplets formed by Janus nano-SiO₂ float on the water phase and can be brought out with the movement of water to improve the oil recovery of the reservoir; Janus nano-SiO₂ can form a stable lotion layer at a lower concentration, which is conducive to cost saving and has application prospects in the oil field.

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	SHI Lei
	MA Zhi
	YAN Haijun
	ZANG Long
	CAO Jie
	SONG Ying
	GUO Jintang

Keywords： Janus nano-SiO₂ pickering emulsion enhanced oil recovery

Received 2023-05-16;

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SHI Lei, MA Zhi, YAN Haijun, ZANG Long, CAO Jie, SONG Ying, GUO Jintang.Efficient preparation of amphiphilic particles and analysis of their application prospects in oil recovery[J] Chemcial Industry and Engineering, 2025,V42(1): 41-46

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