A class of disperse dyes with azobenzothiazole structure suitable for supercritical carbon dioxide anhydrous wool dyeing and preparation method thereof

Abstract

The invention provides disperse dye which is provided with an azobenzothiazolol structure and is suitable for supercritical carbon dioxide anhydrous wool dyeing and a preparation method and application of the disperse dye. The dye has the structure of a general formula I. The dye can be used for supercritical carbon dioxide anhydrous wool dyeing, the compound has a certain level of solubility in supercritical carbon dioxide, and meanwhile an active group and amino or hydroxy in wool are utilized for conducting a chemical reaction, and a reaction product is non-corrosive to a supercritical carbon dioxide dyeing device. In the general formula I, m and n are each an integer, X and Y are independently selected as -H or -CN or -CH3O or -COOCH3, R0 is selected from R1 or R2 or R3, and Ar is selected from Ar1. The formulas are described in the description.

Description

technical field [0001] The invention relates to the technical field of dye chemistry, in particular to a class of disperse dyes with an azobenzothiazole structure suitable for anhydrous wool dyeing with supercritical carbon dioxide, and a preparation method and application thereof. Background technique [0002] carbon dioxide (CO 2 ), a major greenhouse gas, carbon dioxide has been the focus of scientific attention because of its role as a major source of climate change. Under the potential economic and environmental benefits, more effective methods are needed to stabilize and utilize carbon dioxide emitted from the atmosphere or from industry. When the temperature and pressure exceed a certain temperature and pressure (ie 31.10 ° C, 7.39 MPa), the CO at this temperature and pressure 2 becomes supercritical, supercritical CO 2 In addition to the advantages of low toxicity and low viscosity, it also has high diffusivity and permeability, so supercritical CO 2 It is a comm...

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Problems solved by technology

[0007] The previous work of our research group found that (reference: J.Clean.Prod., 2017,143:269-277.), azo dyes without benzothiazole partial structure and anthraquinones with large π-conjugated systems The azo dyes with benzothiazole structure have a dyeing effect on wool fibers, but due to the lack of a proper color fixing process, these disperse dyes are not effective in dyeing wool fibers. The color fixation rate has not yet met the commercial requirements

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