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Synthesis method of CQD (carbon quantum dot) quaternary ammonium salt cationic surfactant

A technology of quaternary ammonium salt cation and surfactant, which is applied in the direction of cationic surface active compound, detergent composition, detergent compounding agent, etc. The effect of biocompatibility, simple synthesis steps, and easy manipulation

Active Publication Date: 2018-01-26
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of carbon quantum dots with a tertiary amine structure, and using it as a raw material for further chemical modification, and the synthesis of cationic surfactants have not been reported yet.
In addition, although some cationic surfactants have strong bacteriostasis and surface activity, they do not have fluorescence characteristics, and the synthesis method is complicated, the raw materials are relatively expensive, and the synthesis cost is relatively high.

Method used

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  • Synthesis method of CQD (carbon quantum dot) quaternary ammonium salt cationic surfactant
  • Synthesis method of CQD (carbon quantum dot) quaternary ammonium salt cationic surfactant
  • Synthesis method of CQD (carbon quantum dot) quaternary ammonium salt cationic surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Weigh 60g (0.31mol) of citric acid, dissolve it in 100mL of distilled water, add 1.71mol of 3-dimethylaminopropylamine, mix well, transfer to a hydrothermal reaction kettle, react at 170°C for 80min, then cool to room temperature;

[0045] (2) The product in (1) is subjected to vacuum distillation to recover excess amine, and the product is placed in a drying oven at 70° C. to dry to obtain fluorescent carbon quantum dots;

[0046] (3) Dissolve the product in (2) in ethanol aqueous solution (90%, w%), add chlorinated n-dodecane according to the molar ratio of 3.30:1 with citric acid, heat and reflux under stirring, and the reaction temperature is 70° C., Reaction time 3.0h;

[0047] (4) The crude product obtained in (3) is subjected to vacuum distillation, reclaims excess ethanol, and adds a small amount of water, separates excess chloro-n-alkane, and recycles;

[0048] (5) The product in (4) is dried in an oven at 70° C. to obtain a carbon quantum dot cationic su...

Embodiment 2

[0050] (1) Weigh 60g (0.31mol) of citric acid, dissolve it in 100mL of distilled water, add 1.71mol of N,N-dimethylethylenediamine, mix well, transfer to a hydrothermal reaction kettle, and react at 175°C for 65min , and then cooled to room temperature;

[0051] (2) with step (2) in embodiment 1;

[0052] (3) Dissolve the product in (2) in aqueous ethanol (92%, w%), add chloro-n-tetradecane in a molar ratio of 2.80:1 with citric acid, heat to reflux under stirring, and the reaction temperature is 70° C., Reaction time 2.5h;

[0053] (4) with step (4) in embodiment 1;

[0054] (5) Same as step (5) in Example 1.

Embodiment 3

[0056] (1) Weigh 60g (0.31mol) of citric acid, dissolve it in 100mL of distilled water, add 2.01mol of 4-dimethylaminobutylamine, mix well, transfer to a hydrothermal reaction kettle, react at 180°C for 70min, and then Cool to room temperature;

[0057] (2) with step (2) in the embodiment;

[0058] (3) Dissolve the product in (2) in aqueous ethanol (94%, w%), add chloro-n-tetradecane in a molar ratio of 3.00:1 with citric acid, heat to reflux under stirring, and the reaction temperature is 70° C., Reaction time 2.5h;

[0059] (4) with step (4) in embodiment 1;

[0060] (5) Same as step (5) in Example 1.

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Abstract

The invention discloses a synthesis method of a CQD (carbon quantum dot) quaternary ammonium salt cationic surfactant and belongs to the field of green manufacturing of fine chemicals. The synthesis method comprises steps as follows: citric acid is taken as a carbon source, a diamino compound with primary amino at one end and tertiary amino at the other end is taken as an N source, an N-doped CQDis synthesized with a hydrothermal method, the CQD is taken as a raw material and subjected to quaternarization with normal halogenated hydrocarbon in ethanol water, and the CQD quaternary ammonium salt cationic surfactant is prepared. The technological method is simple, a product separation method is simple, the preparation process is green, pollution-free and low in synthesis cost, and the prepared CQD quaternary ammonium salt cationic surfactant integrates surface activity, antibacterial activity and fluorescent brightening property and can be widely applied to fields of detergent preparation, bactericide preparation, fluorescent brightener compounding and the like.

Description

technical field [0001] The invention belongs to the field of green manufacturing of fine chemicals, and in particular relates to an economical and green preparation method of a cationic surfactant integrating surface activity, antibacterial properties and fluorescent whitening properties. Background technique [0002] Carbon quantum dots (CQDs) are a class of nano-fluorescent materials with a size below 10nm. It has attracted much attention because of its good chemical stability, high photobleaching resistance and extremely low biological toxicity. During the preparation process, the doping of nitrogen element can change many properties of carbon quantum dots and endow carbon quantum dots with many new characteristics. [0003] With the progress of society, surfactants are more and more widely used in people's daily life. Because surfactants can significantly reduce the surface tension of solutions, and have properties such as dispersion and coagulation, solubilization, em...

Claims

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Application Information

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IPC IPC(8): B01F17/18C09K11/06C09B57/00A01N33/12A01P1/00C11D1/62C11D3/48C11D3/42C09K23/18
Inventor 刘祥蒯勇吴琴房饶浩马亮
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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