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• W3087638000 endingPage "1041" @default.
• W3087638000 startingPage "1033" @default.
• W3087638000 abstract "Abstract The number of hydrophilic and hydrophobic groups of a surfactant has a great influence on its property. Two Gemini surfactants, N,N″‘‐didodecyl‐N,N',N″,N″‘‐tetrapropionate triethylenetetramine and N,N'‐didodecyl‐N,N'‐dipropionate ethylenediamine (referred as DTPTT and DDPED), were prepared by Michael addition reaction of the didodecyl secondary amines with methyl acrylate. The didodecyl secondary amines were synthesized by nucleophilic substitution reaction of triethylenetetramine or ethylenediamine with bromododecane. The DTPTT and DDPED surfactants were characterized by mass spectrometry and proton nuclear magnetic resonance spectrometry. The surface activities of the DTPTT and DDPED aqueous solutions were studied by surface tension measurements. The surface tension and critical micelle concentration ( cmc ) of DDPED is smaller than that of DTPTT. The DDPED can reduce the surface tension of water to approximate 34 mN m −1 at concentration levels of 10 −5 mol L −1 . The aggregation behavior of the DTPTT and DDPED aqueous solution were studied by dynamic light scattering and transmission electron microscopy. Both surfactants can form spherical vesicles at a solution of about 3–5 times cmc of the Gemini surfactants. The foam property was determined by nitrogen blowing method. The DTPTT has relatively good foaming ability and DDPED has excellent foam stability. The foam volume of DDPED barely change within 1000s. The emulsion stability of the Gemini surfactants was determined by separation time of water from the emulsion. The emulsion stability of DDPED is equivalent to Tween 80. The DDPED Gemini surfactant with two hydrophilic carboxylic groups has better surface activity, foam stability, and can be used as an O/W emulsifier." @default.
• W3087638000 created "2020-09-25" @default.
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• W3087638000 date "2020-09-18" @default.
• W3087638000 modified "2023-10-18" @default.
• W3087638000 title "Synthesis and Properties of Two Amino Carboxylic Acid Gemini Surfactants" @default.
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• W3087638000 doi "https://doi.org/10.1002/jsde.12465" @default.
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