Nghiên cứu xây dựng quy trình công nghệ nhuộm cho vải bông bằng thuốc nhuộm hoạt tính

The textile industry frequently faces challenges in optimizing dyeing processes, particularly for cotton fabrics, which are highly valued for their moisture absorption and comfort. This study investigates the critical influence of reactive dyes and auxiliaries concentrations on the color intensity of dyed cotton fabrics. The primary objective is to establish an optimal dyeing technology process that balances color yield, resource efficiency, and environmental impact. By systematically analyzing the effects of varying dye and auxiliary concentrations under controlled conditions, this research aims to identify saturation points beyond which increased concentrations do not enhance, or even diminish, color intensity. Such optimization is crucial for minimizing waste and environmental pollution in textile manufacturing.

Researchers and practitioners in textile chemistry and engineering, textile manufacturers involved in cotton fabric dyeing, and students of textile technology.

This study systematically investigates the optimization of the dyeing process for 100% pretreated cotton fabrics using reactive dyes, specifically Synozol Brilliant BlueR. The research meticulously examines the impact of varying concentrations of reactive dyes, salt (Na2SO4), and alkali (Na2CO3 and NaOH 36°Be) on the final color intensity of the fabric. Utilizing a continuous dyeing method involving squeezing and steaming, experiments were conducted under consistent temperature and time, with individual adjustments to dye and auxiliary concentrations. The methodology involved measuring color intensity via K/S values and color coordinates using an Xritex spectrophotometer. Key findings indicate that increasing concentrations of reactive dyes and auxiliaries generally enhance color intensity up to a saturation point, beyond which further increases yield diminishing returns or even negative effects, such as reduced color uptake or increased environmental burden. For instance, optimal concentrations were identified as 140 g/l for Synozol Brilliant BlueR, 270 g/l for Na2SO4, 20 g/l for Na2CO3, and 15 g/l for NaOH 36°Be. The optimized two-phase dyeing process includes initial impregnation with dye and anti-migration agent, followed by drying and heat setting, then a second impregnation with alkali and salt, and finally steaming and washing. The practical implications of this research are significant, providing textile manufacturers with a data-driven framework to enhance the efficiency of their dyeing processes, reduce material waste, lower production costs, and substantially mitigate environmental pollution, thereby promoting more sustainable textile production practices.