Synthesis and Characterization of a Quaternized Glucosamide-Based Trisiloxane Surfactant

摘要

The synthesis of quaternized glucosamide-based trisiloxane surfactant (QGS) of the general formula Me3SiOSiMeR~1OSiMe3 (R~1 = (CH2)3N~+(CH3)2(CH2)2R~2, R2 = glucosamide group) was described, and the surface activity properties of the surfactant were studied. The N-[2-(dimethylamino)ethyl]-D-gluconamide was synthesized by amidation of the ethylenediamine with D-gluconolactone. The 3-(3-chloropropyi)-1,1,1,3,5,5,5-heptamethyltrisilox-ane was prepared by the acid-catalyzed reaction of a silane monomer. The QGS was prepared by quaternization of the precursor halogenated hydrocarbon with a tertiary amine. They were structurally characterized by IR, ~1H NMR and MS. And it reduced the surface tension of water to approximately 21 mN m~(-1) at concentration levels of 10~(-3)mol L~(-1).