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

Active Publication Date: 2021-02-19
甘肃智仑新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since graphene itself is insoluble in water and lacks an effective dispersant to improve the dispersion of graphene in water, the graphene obtained by ultrasonic exfoliation is easy to re-aggregate.
This seriously hinders the application of solution ultrasonic exfoliation method in the macro-fabrication of graphene

Method used

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  • A star-shaped carboxylic acid-based zwitterionic surfactant and its preparation method and application
  • A star-shaped carboxylic acid-based zwitterionic surfactant and its preparation method and application
  • A star-shaped carboxylic acid-based zwitterionic surfactant and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention belongs to the technical field of dispersant preparation, and discloses a star-shaped carboxylic acid-based zwitterionic surfactant, a preparation method and application thereof. The dispersant is prepared through the following steps: drop quantitative trimethylolpropane-tris(3-aziridinyl propionate) reaction solution in a reaction flask equipped with long-chain fatty primary amine ethanol solution and acid catalyst The first step is the ring-opening reaction of aziridine; then a quantitative amount of methyl chloride (or benzyl chloride) is added to the reaction solution to carry out the second step of quaternization reaction, and the resulting product is a star-shaped amphoteric dispersion carrying multiple charges. agent. The star-shaped amphoteric dispersant prepared by the present invention introduces carboxylate ions into its molecular chain, which can fully disperse the combination of dispersant molecules and graphene in water, enhance the repulsion between graphene particles, and increase its dispersion. Effect. At the same time, quaternary ammonium salt cations are introduced into the molecular chain of the dispersant, which increases the hydration ability and thermal stability of the dispersant.

Description

technical field [0001] The invention relates to the technical field of preparation of polyquaternary ammonium salt cationic compounds, in particular to a star-shaped carboxylic acid-based zwitterionic surfactant and its preparation method and application. Background technique [0002] Gemini surfactants with double hydrophilic groups and double hydrophobic groups, as a new type of surfactant with excellent performance, have received more and more attention and research in recent years. Gemini surfactants are usually chemically bonded to two common surfactants at or near the hydrophilic head group by a linking group, which makes this type of surfactant have many special properties. For example, it exhibits low critical micelle concentration, low solid-liquid interface adsorption, strong salt tolerance and high ability to reduce oil-water interfacial tension, making it have very good application prospects in the field of tertiary oil recovery. [0003] Aminocarboxylate-type g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C229/16C07C227/04C07C227/18C01B32/194
CPCC07C227/04C07C227/18C07C229/16C01B32/194
Inventor 王晨辛燕王霞杨通杨晓武费贵强
Owner 甘肃智仑新材料科技有限公司
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