Synthesis and Characterization of Glucosamide Surfactant
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The synthesis and structural analysis of glucosamide surfactants of the general formula CnH2n+1NH(CH2)2NHCO(CHOH)4CH2OH (n = 8, 10, 12) are described, and the surface activity properties of the surfactants are studied. N-alkylethylenediamines were synthesized by the alkylation of the ethylenediamine with alkyl bromide. The glucosamide surfactants, N-alkyl-N′-glucosylethylenediamine (C n GA), were prepared by amidation of the precursor diamine with d-gluconic acid δ-lactone. They were structurally characterized by IR, 1H NMR and MS. They reduced the surface tension of water to approximately 26–27 mN m−1 at concentration levels of (0.5–1.6) × 10−3 mol L−1.
KeywordsSynthesis Characterization Glucosamide Alkylation Amidation
The financial support of the Natural Science Foundation of China (no. 20976003 and 21176004) and the Research Program of Beijing Municipal Commission of Education (no. KM201010011003) are gratefully acknowledged.
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