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Gemini surfactant and its preparation method and application

A surfactant and gemini-type technology, applied in the gemini-type surfactant and its preparation method and application field, can solve the problems of concrete hardening strength influence, damage to component stability, few people involved, etc., to overcome electrostatic repulsion , good foaming and foam stabilizing performance, enhancing the effect of hydrophobic association

Active Publication Date: 2019-06-28
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this physical method also has obvious disadvantages: the compounding of several different compounds may destroy the stability of the components and cause precipitation; The hardening strength of concrete has a great influence
However, due to the limitation of interdisciplinary research, few people have involved in this area

Method used

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  • Gemini surfactant and its preparation method and application
  • Gemini surfactant and its preparation method and application
  • Gemini surfactant and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Mix 10mmol perylene, 100mmol N-ethylmaleimide, 30mmol tetrachlorobenzoquinone, and 4mmol p-methoxyphenol, and react at 230°C for 4h under nitrogen protection, then add 30mL DMF, stir for 20min, and react After completion, filter while hot, wash the solid with ethanol, and dry to obtain the compound with the structure shown in formula (II).

[0047]Mix 10 mol of the compound represented by formula (II), 100 mmol KOH, and 30 mL of isopropanol, react at 80°C for 8 hours, distill off the isopropanol, add 50 mL of water, add dilute hydrochloric acid to adjust the pH to 3, and filter The solid is washed with water and ethanol respectively, and dried to obtain the compound with the structure shown in formula (III).

[0048] Mix 10mmol of the compound represented by formula (III), 20mmol of N,N-dimethylethylenediamine, and 30mL of DMF, and react at 150°C for 6h under the protection of nitrogen. After cooling, add ethanol to precipitate the solid. After filtering, The solid was...

Embodiment 2

[0051] Mix 10mmol perylene, 150mmol N-ethylmaleimide, 40mmol tetrachlorobenzoquinone, and 5mmol p-methoxyphenol, and react at 250°C for 6h under nitrogen protection, then add 30mL DMF, stir for 30min, and react After completion, filter while hot, wash the solid with ethanol, and dry to obtain the compound with the structure shown in formula (II).

[0052] Mix 10 mol of the compound represented by formula (II), 150 mmol KOH, and 30 mL of isopropanol, react at 90°C for 12 hours, distill off the isopropanol, add 50 mL of water, add dilute hydrochloric acid to adjust the pH to 3, and filter The solid is washed with water and ethanol respectively, and dried to obtain the compound with the structure shown in formula (III).

[0053] Mix 10mmol of the compound represented by formula (III), 30mmol of N,N-dimethylethylenediamine, and 30mL of DMF, and react at 160°C for 9h under the protection of nitrogen. After cooling, add ethanol to precipitate the solid. After filtering, The solid w...

Embodiment 3

[0056] Mix 10mmol perylene, 150mmol N-ethylmaleimide, 40mmol tetrachlorobenzoquinone, and 5mmol p-methoxyphenol, and react at 260°C for 6h under nitrogen protection, then add 30mL DMF, stir for 30min, and react After completion, filter while hot, wash the solid with ethanol, and dry to obtain the compound with the structure shown in formula (II).

[0057] Mix 10 mol of the compound represented by formula (II), 150 mmol KOH, and 30 mL of isopropanol, react at 90°C for 12 hours, distill off the isopropanol, add 50 mL of water, add dilute hydrochloric acid to adjust the pH to 4, and filter The solid is washed with water and ethanol respectively, and dried to obtain the compound with the structure shown in formula (III).

[0058] Mix 10mmol of the compound represented by formula (III), 30mmol of N,N-dimethylethylenediamine, and 30mL of DMF, and react at 170°C for 10h under the protection of nitrogen. After cooling, add ethanol to precipitate the solid. After filtering, The solid ...

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Abstract

The invention provides a gemini surfactant, and a preparation method and application thereof. The gemini surfactant has high surface activity and good foaming ability and foam stability; and when applied as an air entraining agent for concrete, the gemini surfactant has good air entraining and foam stabilizing performance, allows hardened concrete to have a good pore structure, and pose little influence on the hardening strength of the concrete. The gemini surfactant has a specific structure; that is, the molecule of the gemini surfactant contains two hydrophobic chain segments and two hydrophilic units, wherein the hydrophobic chain segments are straight-chain alkyl chains with 8 to 18 carbon atoms, the hydrophilic units are quaternary ammonium salt groups, and the hydrophobic chain segments and the hydrophilic units are covalently connected through bridging units having large aromatic ring structures at positions close to a quaternary ammonium salt.

Description

technical field [0001] The invention relates to a gemini surfactant and its preparation method and application, belonging to the field of concrete admixtures. Background technique [0002] With the development of high-performance concrete, people have paid more and more attention to the durability of concrete in recent years. Adding an air-entraining agent in the concrete mixing process can introduce a proper amount of tiny, uniform and closed air bubbles into the freshly mixed and hardened concrete, thereby improving the workability, durability and thawing resistance of the concrete. Therefore, the development and production of high-performance concrete air-entraining agents are gradually becoming a hot spot in the field of admixtures. [0003] Currently commonly used air-entraining agents include rosin-type air-entraining agents, saponin-type air-entraining agents, alkylsulfonate-type air-entraining agents, etc. From their chemical structures, they are all single-chain s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D487/06C04B24/12C04B103/30
CPCC04B24/005C04B2103/304C07D487/06
Inventor 冉千平陈健乔敏高南萧吕志锋吴井志
Owner JIANGSU SOBUTE NEW MATERIALS