Kinetics study of dyeing bicomponent polyester textiles (PET/PTT) using environmentally friendly carriers

Area of Science:

• Textile Chemistry
• Polymer Science
• Sustainable Materials

Background:

• Traditional dyeing processes for polyester (PET/PTT) bicomponent filaments often require high temperatures and can involve toxic chemicals.
• Developing eco-friendly and economical dyeing methods is crucial for the textile industry.

Purpose of the Study:

• To investigate the dyeing kinetics of PET/PTT bicomponent filaments using biobased carriers (o-vanillin, p-vanillin, coumarin).
• To understand the adsorption mechanisms involved in the dyeing process at different temperatures.
• To evaluate the effectiveness of these ecological carriers for sustainable textile dyeing.

Main Methods:

• Physicochemical characterization of PET/PTT bicomponent filaments using SEM, BET, and DSC.
• Dyeing experiments conducted at 100 °C with ecological carriers and at 130 °C.
• Application of kinetic models (pseudo first-order, pseudo second-order, Elovich, intra-particle diffusion) to analyze dyeing data.
• Determination of dyeing rate constants, half dyeing times, and rise time coefficients.

Main Results:

• Biobased carriers allow dyeing of PET/PTT bicomponent filaments at lower temperatures without compromising elasticity.
• Dyeing kinetics were successfully modeled using various kinetic equations, revealing the adsorption mechanism.
• Dyeing rate constants and other kinetic parameters were determined and analyzed for different disperse dyes.

Conclusions:

• Ecological carriers offer an effective, economical, and sustainable solution for dyeing PET/PTT bicomponent filaments.
• The study provides a foundational understanding of the adsorption mechanisms in ecological carrier-assisted dyeing.
• This research supports the development of greener textile dyeing processes.