Synthesis and Application of Gemini Surfactant Containing Hetero-atom

Quaternary ammonium salt Gemini surfactant with 3-oxa pentyl being conection groups was produced by reaction of N,N-dimethyl-dodecyl amine and 3-oxa-1,5-dibromo pentane.The structure of target product was verified by IR and 1HNMR spectroscopy.Surface tention of biquaternary ammonium salt aqueous solution and its binary complex systems with NP-6,NP-8,NP-15,AEO-3 were measured.The results showed that,compared with conventional surfactants,biquaternary ammonium salt had better surface activity and each of binary complex systems had significant synergistic effect on reducing surface tension.Compared with the conventional pesticide 1631 (cetyltrimethylammonium bromide),the bactericidal activity of biquaternary ammonium was better,especially superior to the apple lunwen bacteria and fungi wheat chek.The inhibition properties on zinc of the synthesized surfactant and its binary complex systems were studied in a weak alkaline medium.The results showed that biquaternary ammonium salt had great corrosion inhibition performance on zinc with the concentration of 5~25 mg/L.In the binary complex systems,the inhibition performance on zinc of the biquaternary ammonium salt / NP-15 was optimal.