Cationic gemini fluorosurfactant based on perfluorononene and perfluorohexene and preparation method thereof

Abstract

The invention discloses a cationic type gemini fluorinated surfactant based on perfluorinated nonene and perfluorinated hexene and a preparation method of the cationic type gemini fluorinated surfactant. The preparation method comprises the following steps of: with the perfluorinated nonene or perfluorinated hexene as a raw material, condensing the perfluorinated nonene or perfluorinated hexene with p-hydroxybenzoic acid, and carrying out chlorination on a matter obtained after condensation and thionyl chloride to prepare perfluorinated alkene oxyl benzoyl chloride; condensing the perfluorinated alkene oxyl benzoyl chloride without separation with 2-dimethylamino ethanol, 3-dimethylamino propanol, 2-dimethylamino ethylamine and 3-dimethylamino propylamine to obtain perfluorinated alkene oxyl benzoate or perfluorinated alkene oxyl benzamide with tertiary amine at an alkanol part or amine part; and finally, condensing the perfluorinated alkene oxyl benzoate or perfluorinated alkene oxyl benzamide with 1,2-dihaloethane, 1,3-dihalopropane, 1,4-dichlorobutane, 1,5-dichloropentane or 3-oxa-1,5-dichloropentane to prepare a quaternary ammonium gemini fluorinated surfactant. The synthesized compound is high in surface activity and is low in critical micelle concentration, has the characteristics of simpleness in synthesization, low cost and the like and has good application prospect.

Description

technical field

[0001] The invention relates to a class of fluorine surfactants, in particular to a class of cationic gemini surfactants containing perfluorononenyloxy or perfluorohexenyloxy groups and a preparation method thereof. Background technique

[0002] Surfactant is an important fine chemical product, which has multiple functions such as wetting, emulsifying, foaming, defoaming, and dispersing, and is known as industrial monosodium glutamate. Surfactants are generally classified into anionic, cationic, amphoteric and nonionic.

[0003] Fluorosurfactants are a special class of surfactants, which have typical three-high amphiphobic (high thermal stability, high chemical stability, high surface activity, both oil-repellent and water-repellent) characteristics, so they are widely used in fire protection, oil extraction, etc. aspects play an extremely important role. The most widely used fluorosurfactants are perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic a...

Images