An amphiphilic carbon dot, a rapid dispersion ultra-stable foam system and a preparation method thereof

By leveraging the synergistic effect of amphiphilic carbon dots and surfactants, a rapidly dispersible and ultra-stable foam system was prepared, which solved the problems of slow dispersion speed and poor stability of foam systems in high-temperature and high-salt environments. It achieved rapid dispersion and long-term stability, adapting to different high-salt scenarios and reducing preparation energy consumption and cost.

CN122126834BActive Publication Date: 2026-07-24YANGTZE UNIVERSITY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANGTZE UNIVERSITY
Filing Date
2026-05-08
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing foam systems exhibit slow dispersion and poor stability in high-temperature and high-salinity environments, and are also costly, making it difficult to meet the actual needs of oilfield flooding.

Method used

A rapidly dispersed, ultra-stable foam system was prepared by using the synergistic effect of amphiphilic carbon dots (Am-CD) and surfactants via a microwave-assisted two-phase interface method. The hydrophilic-hydrophobic structure and nanoscale size of the amphiphilic carbon dots enable rapid migration at the interface to form a foam film with high mechanical strength, thereby enhancing salt resistance.

Benefits of technology

It achieves rapid dispersion and long-term stability of foam systems, shortens dispersion time, prolongs liquid half-life, adapts to different high-salt scenarios, reduces preparation energy consumption and cost, and has wide applicability.

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Abstract

The application provides an amphiphilic carbon dot, a rapid dispersion ultra-stable foam system and a preparation method thereof, and belongs to the field of oil field chemistry, wherein the preparation method of the amphiphilic carbon dot comprises the following steps: dissolving cholic acid in a first solvent to obtain a hydrophobic phase precursor solution; dissolving chitosan oligomer in a second solvent to obtain a hydrophilic phase precursor solution; mixing the hydrophobic phase precursor solution and the hydrophilic phase precursor solution in a closed reactor, standing for 5-10 min, and performing phased microwave treatment: 180-220 W for 1-3 min, 450-550 W for 2-5 min, and 80-120 W for 4-8 min; cooling the reaction liquid to room temperature, and obtaining the amphiphilic carbon dot through filtration, dialysis and freeze-drying. Through the synergistic effect of the amphiphilic carbon dot and the surfactant, the application can realize rapid dispersion to form uniform foam, and can maintain the stability of the foam in a high-salt environment for a long time, thereby meeting the application requirements in a high-salt scene.
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Citation Information

Patent Citations

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