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Novel dimeric cationic surfactant and preparation method thereof

A technology of surfactant and gemini, applied in the field of gemini cationic surfactant, can solve the problems of high price and few varieties of gemini surfactant, and achieve the effect of good water solubility, low surface tension and low cmc value

Inactive Publication Date: 2014-07-16
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these gemini surfactants have disadvantages such as high price and few varieties.

Method used

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  • Novel dimeric cationic surfactant and preparation method thereof
  • Novel dimeric cationic surfactant and preparation method thereof
  • Novel dimeric cationic surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] One, the preparation of intermediate B

[0028] Dissolve 0.114mol (9.9g) of anhydrous piperazine and 18ml (0.228mol) of epichlorohydrin in a mixture of 50ml of ethanol and water (volume ratio 4:1) (indicate that the amount used can be dissolved.), 50°C Heated for 48 hours, cooled to room temperature, washed with acetone, filtered with suction, and dried under vacuum at 40°C to obtain intermediate product B. Yield 60%.

[0029]

[0030] Structural characterization of the intermediate: The mass spectrometer showed that the molecular ion peak MS271.1 was the main peak, indicating that intermediate B was synthesized.

[0031] Two, the preparation of cationic gemini surfactant A

[0032] Dissolve 0.01mol B (2.71g) and 0.02mol (5.94g) of dimethyloctadecylamine in 50ml of n-propanol (note that the amount used can be dissolved.), heat at 90°C for 15h, cool to room temperature, distilled water Wash, filter with suction, and dry under vacuum at 40°C to obtain Gemini surfact...

Embodiment 2

[0046] 1. Preparation of intermediates

[0047] 0.114mol (9.9g) of anhydrous piperazine and 22.5ml (0.285mol) of epichlorohydrin are dissolved in a mixture of 50ml of ethanol and water (volume ratio 4:1) (indicate that the amount used can be dissolved.), 50 It was heated at °C for 48 hours, cooled to room temperature, washed with acetone, filtered with suction, and dried in vacuum at 40 °C to obtain intermediate product B. Yield 65%.

[0048] 2. Preparation of Cationic Gemini Surfactants

[0049] Dissolve 0.01mol B (2.71g) and 0.02mol (5.94g) of dimethyloctadecylamine in 50ml of n-propanol (note that the amount used can be dissolved.), heat at 90°C for 15h, cool to room temperature, distilled water Washing, suction filtration, and vacuum drying at 40° C. to obtain Gemini surfactant A, wherein n=18. Yield 81%.

Embodiment 3

[0051] 1. Preparation of intermediates

[0052]Dissolve 0.114mol (9.9g) of anhydrous piperazine and 27ml (0.342mol) of epichlorohydrin in a mixture of 50ml of ethanol and water (volume ratio 4:1) (note that the amount used can be dissolved.), 50°C Heated for 48 hours, cooled to room temperature, washed with acetone, filtered with suction, and dried under vacuum at 40°C to obtain intermediate product B. Yield 68%.

[0053] 2. Preparation of Cationic Gemini Surfactants

[0054] Dissolve 0.01mol B (2.71g) and 0.02mol (5.94g) of dimethyloctadecylamine in 50ml of n-propanol (note that the amount used can be dissolved.), heat at 90°C for 15h, cool to room temperature, distilled water Washing, suction filtration, and vacuum drying at 40° C. to obtain Gemini surfactant A, wherein, n=18, yield 81%.

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Abstract

The invention relates to a novel dimeric cationic surfactant. The structural formula of the surfactant is indicated as formula (A). The dimeric cationic surfactant introduces groups at a polar head to reach chemical bonding, restrain separating force among the original single-chain single heads and improve appetency among carbon chains, thereby improving surface activity and opening a brand new pathway for practical application. The surfactant has good water solubility. Compared with the general single-head surfactant, the surfactant has low surface tension and a cmc value and is a novel surfactant with a wide application prospect. As shown in the specification, wherein, n=18, 16, 14 or 12.

Description

technical field [0001] The invention relates to a gemini cationic surfactant, in particular to a surfactant with a steric hindrance linking group. Background technique [0002] Compared with the traditional monohydrophilic and monooleophilic surfactants, Gemini cationic surfactants are connected by at least two lipophilic groups and two hydrophilic groups through linking groups. It breaks through the structure of traditional surfactants, changes the charge density of the molecular head group, the density of the alkane main chain and the geometry of the molecule, and then affects the strength of the weak interaction between molecules and the size and shape of the formed aggregates, making it have certain characteristics. Compared with traditional surfactants, Gemini surfactants have the following characteristics: [0003] (1) It is easy to adsorb on the surface of gas / liquid, effectively reducing the surface tension of water; [0004] (2) It is easy to aggregate to form mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/32B01F17/18C07D295/13C09K23/32C09K23/18
Inventor 王月欣曹宇奇张倩孟清张广林
Owner HEBEI UNIV OF TECH
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