Patent ID: 11952536
Assignee: PETROCHINA COMPANY LIMITED
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 6:
7. A method for preparing a carbon dioxide responsive self-thickening smart fluid according to claim 1, which is produced by a process I or II:
process I: dissolving the Gemini surfactant and single-chain amide molecule with a tertiary amine head group in a ratio in water, to obtain the carbon dioxide responsive self-thickening smart fluid; or
process II: reacting the single-chain amide molecule with a tertiary amine head group with a linking molecule of Y—(CH2)p—Y to give a mixture of the Gemini surfactant and the unreacted single-chain amide molecule with a tertiary amine head group; controlling the molar ratio of the single-chain amide molecule with a tertiary amine head group to the linking molecule of Y—(CH2)p—Y during the reaction, so that the ratio of the Gemini surfactant as produced by the reaction to the unreacted single-chain amide molecule with a tertiary amine head group satisfies the requirement for the ratio of them in the carbon dioxide responsive self-thickening smart fluid; and
dissolving the mixture produced by the reaction in water to obtain the carbon dioxide responsive self-thickening smart fluid.