Synthesis and Characterization of a Quaternized Glucosamide‐Based Trisiloxane Surfactant

The synthesis of quaternized glucosamide‐based trisiloxane surfactant (QGS) of the general formula Me3SiOSiMeR1OSiMe3 (R1 = (CH2)3N+(CH3)2(CH2)2R2, 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‐chloropropyl)‐1,1,1,3,5,5,5‐heptamethyltrisiloxane 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.