Effects of Cationic Gemini Surfactants on the Wettability of Solid Surface
Yang Guang Ye Zhongbin Zhang Fengying Yang Jianjun (The State Key Lab of Oil and Gas Reservoir Geology and Exploitation of SWP1, Chengdu 660500; College of Chemistry and Chemical Engineering of SWP1, Chengdu 660500)
The effects of cationic Gemini surfactants on the wettability of solid surface were examined and their action mechanisms were discussed. The result showed that the cationic Gemini surfactants in very low concentration could effectively convert oil wet surface into water wet surface compared with the common surfactants and couldn't change wettability of water - wet surface. Additionally, the effects of Gemini surfactant with the same linking group but different hydrophobic alkyl chain length on the wettability were also investigated and it was found that the cationic Gemini surfactant with short alkyl chain length could more significantly influence the wettability of solid surface than that with long alkyl chain.