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Cationic-type oligo-surface active agent and preparing method thereof

A surfactant, cationic technology, applied in the field of cationic oligomeric surfactants and their preparation, can solve the problems of restricting the promotion and application of oligomeric surfactants, limited research and development, and expensive, etc. effect of cluster concentration, high surface/interfacial activity, and short reaction time

Inactive Publication Date: 2004-09-15
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Owing to the price of the oligomeric surfactant produced abroad is very expensive, and domestic research and development in this respect are very limited, moreover, the relationship between the structure and performance of the oligomeric surfactant needs further research at present, these are all Limit the promotion and application of oligomeric surfactants to a certain extent

Method used

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  • Cationic-type oligo-surface active agent and preparing method thereof
  • Cationic-type oligo-surface active agent and preparing method thereof
  • Cationic-type oligo-surface active agent and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Accurately weigh 148.5g (0.5mol) of octadecyldimethylamine, 38.3g (0.5mol) of propylene chloride, and 150g of absolute ethanol in a 500ml reactor, heat it to 40-50°C in an airtight manner, and stir React for 8 hours. The reaction mixture was taken out, and the solvent ethanol was distilled off under reduced pressure to obtain a light yellow wax. After soaking in anhydrous ether, a white precipitate precipitated out. After filtering and drying, the product obtained is octadecyl dimethyl allyl ammonium chloride (ODMAAC). Prepare octadecyl-dimethyl-allyl ammonium chloride with distilled water into an aqueous solution with a concentration of 15% by mass in a reaction kettle, stir and heat up to 60-80°C. Then add sodium sulfite and potassium persulfate initiator solution. The reaction was completed quickly and separated into two layers, the upper layer was a white viscous paste, and the lower layer was an aqueous solution. The upper white paste was taken out a...

Embodiment 2

[0036] Example 2: Prepare octadecyl-dimethyl-allyl ammonium chloride with distilled water into an aqueous solution with a concentration of 30% by mass in a reaction kettle, stir and heat up to 60-80°C. Then add sodium sulfite and potassium persulfate initiator solution. The reaction was completed quickly and separated into two layers, the upper layer was a white viscous paste, and the lower layer was an aqueous solution. The upper white paste was taken out and dried to obtain a white solid (PODMAAC-2). The overall yield of product was 89.6%.

Embodiment 3

[0037] Embodiment 3: The molecular weight of the cationic oligomeric surfactant PODMAAC-1 synthesized in embodiment 1 has been characterized by gel chromatography, see figure 1 .

[0038] Pump parameters and models: Waters 515 pump

[0039] Host model: Waters 2410 Refractive Index detector

[0040] Solvent: THF

[0041] Column model: μstyragel HR5E 300×4.6mm (inner diameter)

[0042] Temperature: 30°C

[0043] The results of gel chromatography are as follows:

[0044] from figure 1 The weight average molecular weight, number average molecular weight and Z average molecular weight of PODMAAC-1 were obtained. The weight average molecular weight Mw=17710, the number average molecular weight Mn=17250. The weight average molecular weight is quite close to the number average molecular weight (Mw / Mn=1.027), indicating that the molecular weight distribution is narrow and close to monodisperse.

[0045] from figure 1 It can also be calculated that the lowest molecular weight o...

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Abstract

The invention relates to a cation oligomeric surface active agent as well as its making method, including: (1) adding octadecyl dimethyl amine and equimolar propenyl chloride in the reactor to evenly blend; (2) reacting hermetically at 40-50 deg.C for 8-12 hours; (3) adding the resultant in anhydrous aether to produce white deposit, and filtering the deposit to dry; (4) preparing the above resultant into water solution, the concentration 10-30 quality percent, blending, heating to 60-80 deg,C, and adding in redox initiator; (5) after reacting, the system is separated into two layers; (6) taking out the top white paste to dry to obtain white solid. It has higher surface activity, better water solubility and extremely low critical lump concentration.

Description

technical field [0001] The invention relates to a cationic oligomeric surfactant and a preparation method thereof, belonging to a cationic surfactant and a preparation method thereof. Background technique [0002] In view of the extremely high surface / interface activity and other special properties of oligomeric surfactants, domestic and foreign scholars have increasingly studied them in recent years. At present, domestic and foreign scholars' research on oligomeric surfactants mainly focuses on dimeric surfactants (Dimeric Surfactants), while research on oligomeric surfactants with a higher degree of polymerization involves less. Owing to the price of the oligomeric surfactant produced abroad is very expensive, and domestic research and development in this respect are very limited, moreover, the relationship between the structure and performance of the oligomeric surfactant needs further research at present, these are all To a certain extent, the promotion and application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K23/18
Inventor 陈洪韩利娟罗平亚
Owner SOUTHWEST PETROLEUM UNIV
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