Covalent polyester colouration by in situ chromophore creation

Area of Science:

• Polymer Chemistry
• Materials Science
• Textile Chemistry

Background:

• Traditional polyester dyeing often generates significant colored wastewater.
• Developing sustainable and efficient coloration methods for polyesters is crucial.
• In situ dye formation offers a potential solution to reduce environmental impact.

Purpose of the Study:

• To develop a novel method for permanent polyester coloration via in situ azo coupling.
• To confirm successful polymer modification and adaptation through chromophore formation.
• To assess the potential of the colored polymer in preventing indigo deposition for detergent applications.

Main Methods:

• A straightforward azo coupling reaction was employed for polyester modification.
• In situ chromophore generation was utilized, occurring only after successful polymer adaptation.
• The resulting polymer's ability to prevent indigo deposition was tested on various fabrics.

Main Results:

• Permanent coloration of polyester was achieved through the in situ azo coupling method.
• The process confirmed successful polymer adaptation, generating color only upon modification.
• The developed polymer effectively prevented indigo deposition on multiple fabric types.
• No colored waste was produced during the coloration process.

Conclusions:

• The in situ azo coupling method provides a sustainable and efficient route for permanent polyester coloration.
• This technique ensures zero colored waste generation and confirms successful polymer modification.
• The resulting functionalized polyesters show promise for advanced applications, such as in detergent formulations to prevent indigo transfer.