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Preparation method of modified hydroxyethyl cellulose cation slow-cracking asphalt emulsifier

A technology of hydroxyethyl cellulose and asphalt emulsifier, used in building components, building insulation materials, construction and other directions, can solve the problems of increased wastewater treatment cost, poor water solubility, unfavorable promotion, etc., and achieves excellent surface activity and mild reaction conditions. , the effect of low price

Active Publication Date: 2019-05-10
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned small molecule emulsifiers have a generally high critical micelle concentration at normal temperature; and chitosan-based emulsifiers need to consume a large amount of acid in the production process due to the extremely poor water solubility of chitosan itself, resulting in production and production. The cost of wastewater treatment in the later stage will increase, which is not conducive to its promotion in the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of emulsifier

[0031] Dissolve 27.69g (0.13mol) of dodecyldimethyl tertiary amine in 20ml of absolute ethanol, raise the temperature to 60°C, and slowly add 15.64g (0.17mol) of epichlorohydrin (60-70 minutes), React at 60°C for 6h, after cooling to room temperature, distill at 45°C for 60 minutes with a rotary evaporator to remove solvent and unreacted raw materials; vacuum dry at 45°C to obtain a long-chain quaternary ammonium salt intermediate.

[0032] Disperse 7.4g (0.01mol) of hydroxyethyl cellulose in 25ml of isopropanol, add 20ml of NaOH solution (concentration: 12wt%), swell at room temperature for 13h, then raise the temperature to 45°C, add 12.22g (0.04mol) of the above Chain quaternary ammonium salt intermediate, react at 45°C for 5h, cool to room temperature, centrifuge, wash; dry at 80°C to obtain modified hydroxyethyl cellulose cationic slow-cracking asphalt emulsifier.

[0033] The critical micelle concentration (CMC) of the above-mentioned ...

Embodiment 2

[0038] Preparation of emulsifier

[0039]Dissolve 31.33g (0.13mol) of tetradecyldimethyl tertiary amine in 20ml of anhydrous methanol, raise the temperature to 65°C, and slowly add 16.65g (0.18mol) of epichlorohydrin (60-70 minutes), React at 65°C for 6h, cool to room temperature, and distill at 50°C for 70 minutes with a rotary evaporator to remove solvent and unreacted raw materials; vacuum dry at 45°C to obtain a long-chain quaternary ammonium salt intermediate. Disperse 7.4g (0.01mol) of hydroxyethyl cellulose in 25ml of isopropanol, add 20ml of NaOH solution (concentration: 14wt%), swell at room temperature for 14h, then raise the temperature to 50°C, add 13.34g (0.04mol) of the above Chain quaternary ammonium salt intermediate, react at 50°C for 5h, cool to room temperature, centrifuge, wash; dry at 80°C to obtain modified hydroxyethyl cellulose cationic slow-cracking asphalt emulsifier.

[0040] The critical micelle concentration (CMC) of the above-mentioned modified h...

Embodiment 3

[0044] Preparation of emulsifier

[0045] Dissolve 34.97g (0.13mol) of hexadecyldimethyl tertiary amine in 20ml of isopropanol, raise the temperature to 65°C, and slowly add 16.65g (0.18mol) of epichlorohydrin (60-70 minutes), React at 65°C for 6h, after cooling to room temperature, use a rotary evaporator to distill at 40°C for 70 minutes to remove solvent and unreacted raw materials; vacuum dry at 45°C to obtain a long-chain quaternary ammonium salt intermediate. Disperse 7.4g (0.01mol) of hydroxyethyl cellulose in 25ml of isopropanol, add 20ml of NaOH solution (concentration: 15wt%), swell at room temperature for 16h, then raise the temperature to 50°C, add 14.46g (0.04mol) of the above Chain quaternary ammonium salt intermediate, react at 50°C for 5h, cool to room temperature, centrifuge, wash; dry at 80°C to obtain modified hydroxyethyl cellulose cationic slow-cracking asphalt emulsifier.

[0046] The critical micelle concentration (CMC) of the above-mentioned modified h...

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Abstract

The invention discloses a preparation method of a modified hydroxyethyl cellulose cation slow-cracking asphalt emulsifier. The method comprises the following steps: adding hydroxyethyl celluloses intoisopropanol for dispersion, adding a NaOH solution, then swelling for 12-16 h at normal temperature, heating to the temperature of 40-50 DEG C, adding a long-chain quaternary ammonium salt intermediate, reacting for 4-6 h at the temperature of 40-50 DEG C, cooling to the room temperature, centrifuging and washing; and drying at the temperature of 80 DEG C to obtain the modified hydroxyethyl cellulose cation slow-cracking asphalt emulsifier. The raw materials of the emulsifier prepared by the invention are environmentally friendly, the price is low, a preparation process is simple, the production cost is low, and the emulsification performance is high.

Description

technical field [0001] The invention relates to a preparation method of a modified hydroxyethyl cellulose cationic asphalt emulsifier, belonging to the technical field of fine chemicals. Background technique [0002] With the construction of the modern urban comprehensive transportation system and the improvement of the road network structure, the regular maintenance and repair of the road surface is becoming more and more important. Emulsified asphalt has become an important material in road repair and maintenance technology due to its unique room temperature construction, energy saving, low VOC, environmental protection and many other advantages. Among them, cationic asphalt emulsion is widely used because of its own characteristics, when it contacts with stone, its adhesion is stronger and it is not easy to fall off. Slurry seal is an effective means of highway maintenance, but the asphalt emulsion and stones need to be stirred before construction, which requires the asp...

Claims

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Application Information

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IPC IPC(8): C08B11/145C08J3/03C08L95/00
Inventor 王月欣侯闰翰张倩张子旭王晓曦高孟瑶
Owner HEBEI UNIV OF TECH
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