Biquaternary ammonium salt surfactant and synthetic method thereof

Abstract

The invention relates to a surfactant, and provides a biquaternary ammonium salt surfactant. A chemical name of the biquaternary ammonium salt surfactant is biquaternary ammonium salt dibromo N,N-bis(long-chain alkyl dimethyl)-3-oxa-1,5-pentanediamine. A synthetic method of the biquaternary ammonium salt surfactant comprises the following steps: (1) adding 0.1 mol of diethylamine into a three-necked flask with a stirrer and 2 dropping funnels, then respectively adding 0.05mol of dichloroethane and 0.05mol of sodium hydroxide solution with a weight / volume percent of 40 percent, and preparing tetraethylethylenediamine; and (2) adding bromododecane, tetraethylethylenediamine and absolute ethyl alcohol into the three-necked flask with a reflux condensation apparatus, recrystallizing, separating and purifying to obtain the biquaternary ammonium salt surfactant. By adopting the biquaternary ammonium salt surfactant, the problem that the biquaternary ammonium salt surfactant for producing a polyester fabric is uneasy to synthesize can be solved.

Description

technical field [0001] The invention relates to surfactants, in particular to a diquaternary ammonium salt surfactant and a synthesis method thereof. Background technique [0002] Polyester (PET) was industrialized in the 1950s. Due to a series of excellent properties, it is widely used in clothing, decoration, industry and other fields, and its output ranks first among the three major synthetic fibers. However, PET molecules lack hydrophilic groups, polyester has poor hygroscopicity, is prone to pilling, and generates static electricity. At 65% relative humidity and 25°C, the moisture absorption rate is only 0.4%, and the volume resistivity is as high as 1016Ω·cm[1]. Electrostatic charges are more likely to accumulate in low humidity environments. The electrostatic problem of PET brings a lot of trouble to its processing and application: Affected by static electricity, polyester will have certain difficulties in every production process such as spinning, twisting, weaving ...

AI Technical Summary

Problems solved by technology

However, due to the different amounts of diquaternary ammonium salts of the same quality dissolved in water, as the number of carbons increases, the amount of diquaternary ammonium salts that dissolve becomes smaller

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