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Preparation method of double-end based amide type glycine betaine surfactant and application thereof

A double-head group amide-type, surfactant technology, applied in the field of colloid and interface chemistry, surfactants, can solve the problem that does not involve the preparation and application of double-head group amide-type betaine surfactants, and does not involve double-head group Solve the problems of amide-type betaine surfactant and other problems, achieve good solubilization effect and simple preparation process

Inactive Publication Date: 2014-02-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the Bola type surfactant, CN101298553A also discloses a new type of double hydrophilic surfactant, formula system and application thereof. Although it relates to a double-head surfactant with a molecular structure of "Y" type, it is mainly used as In oil field oil recovery aids, not related to other types of double-head group amide type betaine surfactants and applications thereof of the present invention
So far, it has not been related to the preparation and application of openly related double head amide type betaine surfactants

Method used

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  • Preparation method of double-end based amide type glycine betaine surfactant and application thereof
  • Preparation method of double-end based amide type glycine betaine surfactant and application thereof
  • Preparation method of double-end based amide type glycine betaine surfactant and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: intermediate N , N -Synthesis of bis-(dimethylaminopropyl)dodecylamide

[0028] It is 1.2: 1 to feed intake with the mol ratio of tetramethyldipropylene triamine and dodecanoic acid, N 2 Protected, heated to 80°C under oil bath conditions, the material was completely melted and kept for 2.5 hours. Raise the temperature to 120°C and keep it warm for 2 hours, then continue to raise the temperature, the temperature gradually rises from 120°C to 160°C, the water generated during the reaction is continuously distilled out, and after 6 hours of reaction, the conversion rate of fatty acid reaches 70%. After the reaction is complete, transfer the crude reaction product to a separatory funnel, add 5% (w / w) sodium hydroxide solution, then add dichloromethane for extraction, let stand to separate layers, separate the dichloromethane layer, and wash with saturated salt Wash the dichloromethane layer with water for 3 times, dry the dichloromethane layer with anhydro...

Embodiment 2

[0030] Embodiment 2: the synthesis of double head group hexadecyl amido sultaine

[0031] According to the synthesis method in Example 1, the dodecanoic acid is replaced by hexadecanoic acid to prepare the intermediate N , N - Bis-(dimethylaminopropyl)hexadecylamide. Press propane sultone and intermediates N , N - The molar ratio of bis-(dimethylaminopropyl)hexadecylamide was 2.5:1 for feeding. First use acetone as solvent to dissolve the intermediate N , N -Bis-(dimethylaminopropyl)hexadecylamide, heat up to 60°C, after the solvent is stably refluxed, slowly add propane sultone dropwise through the dropping funnel, the reaction time is 48 hours, and suction filter after the reaction is completed Remove solvent acetone with N ,N - Dissolve the filter cake in dimethylformamide, recrystallize twice, and dry in vacuo for 48 hours to obtain a light yellow solid. intermediate N , N - Bis-(dimethylaminopropyl)hexadecylamide conversion >90%.

[0032] The purified product w...

Embodiment 3

[0033] Embodiment 3: the synthesis of double head group dodecyl amido carboxyl betaine

[0034] According to the synthesis method in Example 1, prepare N , N - bis-(dimethylaminopropyl) laurylamide. It is dissolved in ethanol, and sodium chloroacetate is dissolved in water for feeding, wherein N , N - The molar ratio of bis-(dimethylaminopropyl)dodecylamide to sodium chloroacetate is 1:3, and the volume ratio of ethanol to water is 5:1. The reaction temperature is 78-85°C, the reactants are homogeneous, and the reaction time is 8h. After the reaction is finished, the ethanol and water are removed by rotary evaporation, then absolute ethanol is added, the insoluble unreacted raw material sodium chloroacetate and the sodium chloride produced by the reaction are filtered off, and the purified double head group is obtained after being washed 3 times with dichloromethane. Laurylamidocarboxybetaine.

[0035] The purified product was analyzed by infrared spectroscopy, and the r...

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Abstract

The invention discloses a preparation method of a double-end based amide type glycine betaine surfactant and application of the double-end based amide type glycine betaine surfactant, and belongs to the field of surfactant, colloid and interface chemistry. The double-end based amide type glycine betaine surfactant is prepared from N, N-bis(dimethylaminopropyl) alkylamide and sodium chloroacetate or propane (butane) sultone subjected to reaction. The double-end based amide type glycine betaine surfactant is of Y-type molecular structure. By virtue of the special structure, the formed micelle system is loose in structure, and beneficial for solubilizing of organics. The double-end based amide type glycine betaine surfactant can be used for solubilizing an organic pollutant nitrobenzene; at 25 DEG C, the MSR (molar solubilization ratio) is 1.013, 1 gKm is equal to 3.2, and 1 gKm is larger than 0. The nitrobenzene is strong in the micelle distribution, which is higher than the octanol-water distribution coefficient (1 gKow is equal to 1.85).

Description

technical field [0001] The invention discloses a preparation method and application of a double-head amide type betaine surfactant, belonging to the field of surfactants, colloids and interface chemistry. Background technique [0002] Surfactants play an important role in technical fields such as daily chemicals, food and pharmaceuticals, light industry textiles, life sciences, and environmental sciences because of their important functions such as solubilization, wetting, spreading, foaming, emulsification, dispersion, and washing. , Known as "industrial monosodium glutamate". The classic surfactant molecule contains a hydrophilic group and a hydrophobic group, and there have been many studies on this type of surfactant. However, there are few studies on double-headed surfactants containing two hydrophilic groups and one hydrophobic group. Double-headed surfactants have stronger hydrophilicity because they contain two hydrophilic groups. Compared with general surfactants ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/22C07C233/36C07C231/12C07C53/10C07C51/41C07C309/04C07C303/32C09K23/22
Inventor 刘学民郭珊珊杜光劲袁圆杨欠欠
Owner JIANGNAN UNIV
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