Preparation method and application of sulfate type photoresponsive foam control agent

A foam control agent, sulfate-type technology, applied in the field of preparation of sulfate-type light-responsive foam control agents, can solve the problem of light stability, isomerism recovery, and cycle performance of responsive surfactants that are not suitable for actual production applications Not very ideal and other problems, to achieve the effect of reducing the consumption of chemical additives, excellent stability and cycle performance, and solving the residual foam
CN110407723AActive Publication Date: 2019-11-05JIANGNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGNAN UNIV
Publication Date
2019-11-05

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Abstract

The invention discloses a preparation method and an application of a sulfate type photoresponsive foam control agent. The preparation method comprises the following steps: (1) reacting p-nitrophenol,potassium hydroxide and water to obtain p-hydroxyazobenzene; and (2) dissolving the p-hydroxyazobenzene in DMF, adding an inorganic alkali and a catalyst, then dropwise adding DMF containing 1-bromoalkane to perform a reaction in order to obtain 4-hydroxy-4'-alkoxyazobenzene, dissolving the 4-hydroxy-4'-alkoxyazobenzene in DMF, adding the inorganic alkali and a catalyst, dropwise adding DMF containing 2-bromoethanol to perform a reaction in order to obtain 4-(2-hydroxyethoxy)-4'-alkoxyazobenzene, dropwise adding chlorosulfonic acid to the 4-(2-Hydroxyethoxy)-4'-alkoxyazobenzene in an ice waterbath, removing the ice water bath, carrying out a reaction at room temperature, and adjusting the pH vale to be more than 7 in order to obtain the sulfate type photoresponsive foam control agent. Thefoam control agent can realize the reversible conversion of a defoaming agent and a foam stabilizer under the irradiation of ultraviolet light and visible light in order to control foam and solve theproblem of residual foam.
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Description

technical field

[0001] The invention relates to a preparation method and application of a responsive surfactant in the field of textile chemical industry, in particular to a preparation method and application of a sulfate-type photoresponsive foam control agent. Background technique

[0002] Foam dyeing and finishing technology is one of the important ways to solve the problems of large resource consumption and large pollutant discharge in my country's current printing and dyeing industry, especially for the serious problem of high-salt and high-alkali wastewater caused by reactive dye dyeing. The concentration of inorganic salts is usually at 30 -100g·L -1 , causing the concentration of chloride ions in dyeing wastewater to be as high as 10×10 4 more than ppm, and the color fixation rate of reactive dyes is generally only about 70%, resulting in thousands of times the color of dyeing wastewater exceeds the standard, reaching 8000-30000ppm. Parag et al. (ACSSustainable Chem...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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