A star-shaped carboxylic acid-based zwitterionic surfactant and its preparation method and application
A technology of surfactant and zwitterion, which is applied in the field of star-shaped carboxylic acid-based zwitterionic surfactant and its preparation, can solve the problems of lack of dispersant, hindrance of application, easy re-aggregation of graphene, etc., to increase the dispersion effect, Enhanced repellency, increased hydration capacity and thermal stability effects
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Embodiment 1
[0039] (1) Be that 80% dodecyl primary amine ethanol solution (34.69g, wherein contain dodecyl primary amine 27.75g, 0.15mol) and acidic catalyst (85%H 3 PO 4 , 0.50g), be warming up to 50 ℃, dropwise add the trimethylolpropane-three (3- aziridinyl propionate) ethanol solution (35.42g, containing trimethylolpropane- Tris(3-aziridinyl propionate) 21.25 g, 0.05 mol), and the dropping time is 40 min. After the dropwise addition was completed, the temperature was raised to 70° C. for 6 h.
[0040] (2) The above reaction solution was adjusted to weak alkalinity (pH=9-10) with NaOH, and an aqueous solution of sodium chloroacetate (43.68 g, containing 34.94 g of sodium chloroacetate, 0.30 mol) with a mass fraction of 80% was added dropwise, The dropping time was 60 minutes, and the reaction was carried out at 70°C for 16 hours; after the reaction, the insoluble matter was removed, the reaction solution was concentrated, the product was purified by toluene column chromatography, and...
Embodiment 2
[0049] (1) Be that 80% octadecyl primary amine ethanol solution (50.53g, wherein contain octadecyl primary amine 40.43g, 0.15mol) and acidic catalyst (85%H 3 PO 4 , 0.60g), be warming up to 50 ℃, dropwise add trimethylolpropane-three (3- aziridinyl propionate) ethanol solution (35.42g, containing trimethylolpropane- Tris(3-aziridinyl propionate) 21.25 g, 0.05 mol), and the dropping time is 40 min. After the dropwise addition was completed, the temperature was raised to 50° C. for 8 h.
[0050] (2) The above reaction solution was adjusted to weak alkalinity (pH=9-10) with NaOH, and an aqueous solution of sodium chloroacetate (43.68 g, containing 34.94 g of sodium chloroacetate, 0.30 mol) with a mass fraction of 80% was added dropwise, The dropwise addition time is 60 minutes, and the reaction is carried out at 90°C for 10 hours; after the reaction, the insoluble matter is removed, the reaction solution is concentrated, the product is purified by toluene column chromatography,...
Embodiment 3
[0059] (1) Be that 80% tetradecyl primary amine ethanol solution (40.03g, wherein contain tetradecyl primary amine 32.03g, 0.15mol) and acid catalyst (85%H 3 PO 4 , 0.50g), be warming up to 50 ℃, dropwise add the trimethylolpropane-three (3- aziridinyl propionate) ethanol solution (35.42g, containing trimethylolpropane- Tris(3-aziridinyl propionate) 21.25 g, 0.05 mol), and the dropping time is 40 min. After the dropwise addition was completed, the temperature was raised to 60° C. for 7 h.
[0060] (2) The above reaction solution was adjusted to weak alkalinity (pH=9-10) with NaOH, and an aqueous solution of sodium chloroacetate (43.68 g, containing 34.94 g of sodium chloroacetate, 0.30 mol) with a mass fraction of 80% was added dropwise, The dropping time was 60 minutes, and the reaction was carried out at 80°C for 14 hours; after the reaction, the insoluble matter was removed, the reaction solution was concentrated, the product was purified by toluene column chromatography,...
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