Abstract
The CO2 capture, utilization and storage (CCUS) are very important. CO2-responsive materials have good CO2 responsiveness and can play a certain role in CCUS. However, the use temperature of CO2-responsive surfactant is relatively low, and the main factors affecting their performance are still not clear, seriously affecting their large-scale application. In this work, a kind of high-temperature CO2-responsive surfactant was synthesized, and it can form a high-temperature CO2-responsive smart gel system when combined with counter ion salt. The effects of temperature, surfactant concentration, salinity, aging time and oil content on the properties of the CO2-responsive smart gel system were studied by means of rheological experiments and SEM characterization. Combined with statistical analysis methods, a large number of experimental data were analyzed and fitted, a mathematical model was constructed. The mathematical model was highly feasible and statistically significant. Based on the mathematical model, the main factors affecting the performance of the CO2-responsive smart gel system were analyzed, and the gelation mechanism of the gel system was obtained. This work is expected to provide some guidance for the future application of the CO2-responsive smart gel.
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