A kind of polymer pH fluorescent probe for cotton transfer printing and dyeing and its preparation method and application

Abstract

The invention discloses a polymer pH fluorescent probe for cotton transfer printing and dyeing. Its structural formula is as follows: In the present invention, rhodamine B with a carboxyl group at the 2-position is reacted with hydrazine hydrate to form a lactam, and then reacted with acryloyl chloride , to obtain a monomer containing a rhodamine group, and finally synthesize a polymeric pH fluorescent probe with a specific fluorescent response to H+ by copolymerization. The polymeric pH fluorescent probe has very good water solubility, and the fluorescent response to the pH from alkaline to weakly acidic is very significant. At the same time, the polymeric pH fluorescent probe can be melted and softened at 110 ° C, migrated and adsorbed on cotton fibers Surface, so it is very convenient to track and monitor the surface reaction degree of the fabric during the steaming process. By monitoring the pH value of the fabric surface during steaming with this pH fluorescent probe, it is possible to know whether the reaction can be completed in real time and conveniently, so as to accurately control the end point of the reaction.

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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