Macromolecular pH fluorescent probe for cotton transfer printing and dyeing and preparation method and application thereof

Abstract

The invention discloses a macromolecular pH fluorescent probe for cotton transfer printing and dyeing. The structural formula of the macromolecular pH fluorescent probe is shown in the description. After 2-poistion Rhodamine B with carboxyl and hydrazine hydrate react to generate lactam, lactam reacts with acryloyl chloride, monomers with Rhodamine groups are obtained, and finally the macromolecular pH fluorescent probe with specific fluorescent responses to H+ is synthesized through copolymerization. The macromolecular pH fluorescent probe has very good water solubility, the fluorescent responses to the pH from alkaline to acidulous are very remarkable, meanwhile, the macromolecular pH fluorescent probe can achieve hot melting to be softened at the temperature of 110 DEG C, and can transfer and adsorb to the surfaces of cotton fibers, and therefore the reaction extent of the fabric surface can be tracked and monitored conveniently in the steaming process. Whether the reaction is finished or not can be known conveniently in real time by monitoring the pH value of the fabric surface through the pH fluorescent probe in the steaming process, and therefore the reaction endpoint is precisely controlled.

Description

technical field [0001] The invention relates to the field of reactive dye printing and dyeing of cotton fabrics, in particular to a polymer pH fluorescent probe for cotton transfer printing and dyeing, a preparation method and application thereof. Background technique [0002] Digital transfer printing of cotton fabrics with reactive dyes is a new technology in recent years. Compared with the traditional reactive dye printing and dyeing process, this process has a good energy-saving and emission-reduction effect. At the same time, the fineness, color richness and pattern design flexibility of the produced cotton fabric products are relatively high. However, the digital transfer printing process of cotton fabrics with reactive dyes also has its own shortcomings. The surface of this cotton transfer paper integrates an alkaline catalyst for the reaction between active ink and fabric, and it is difficult to judge the end point of the reaction between active ink and fabric during...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defect that it is difficult to judge the end point of the reaction between active ink and fabric in the digital transfer printing process of digital transfer printing with reactive dyes, and to provide a polymer pH fluorescent detector for cotton transfer printing and dyeing. Needle

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