Perfluoroalkyl quaternary ammonium salt and preparation method thereof

Abstract

The invention discloses perfluoroalkyl quaternary ammonium salt and a preparation method thereof. The structural formual of perfluoroalkyl quaternary ammonium salt is as shown in the specification. The preparation method comprises the following step: directly performing quaterisation on perfluorohexyl ethyl iodide and N-methyldiethanolamine to prepare perfluoroalkyl quaternary ammonium salt. According to the invention, MDEA and perfluorohexyl ethyl iodide are used as main raw materials to synthesize a novel perfluoroalkyl quaternary ammonium salt surfactant. The perfluoroalkyl quaternary ammonium salt surfactant has excellent performances such as surface tension and low critical micelle concentration. Performance comparison test shows that the perfluoroalkyl quaternary ammonium salt surfactant has re-wettability superior to re-wettabilities of EQ and D1821, and the anti-yellowing performance is superior to that of D1821 but inferior to that of EQ. The surfactant yet has good anti-yellowing performance. The perfluoroalkyl quaternary ammonium salt surfactant can be a good flexibilizer and has good development prospect.

Description

technical field [0001] The invention relates to a fluorine-containing quaternary ammonium salt surfactant, in particular to a perfluoroalkyl quaternary ammonium salt and a preparation method thereof. Background technique [0002] The fluorine-containing quaternary ammonium salt surfactant is to replace the H atom on the hydrocarbon group of the common hydrocarbon quaternary ammonium salt surfactant with an F atom to become an F-C chain, and the hydrophobic group after the substitution is a substituted fluorocarbon chain . Fluorinated quaternary ammonium surfactants can be divided into perfluorinated fluorinated quaternary ammonium surfactants and semi-fluorinated fluorinated quaternary ammonium surfactants according to the degree of fluorination. If all the H atoms in the C-H chain are replaced by F atoms, such a fluorosurfactant is called a perfluorinated fluorosurfactant; while the F atoms in the C-H chain are partially replaced by the H in the compound, it is called a se...

AI Technical Summary

Problems solved by technology

[0007] At present, fluorine-containing quaternary ammonium salt surfactants have problems such as expensive raw materials and poor biodegradability. Therefore, improvement in the raw material preparation process is still needed

There has not been a lot of research on the development of products such as fluorine-containing monomers, fluorine-containing alkyl halides and fluorine-containing quaternary ammonium salt surface agents, the integration of the fluorine-containing product industry chain, and cost reduction. The shortage of quaternary ammonium products

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