Evaluation of Polyamide Fiber Dyeing Using Alcoholic Solutions

Abstract

Purpose: This research aims to evaluate the effect of alcoholic solutions in the reduction of the dyeing temperature process and its effects on the properties of polyamide fiber.   Theoretical framework: The textile industry is known for its high water demand and energy consumption. Fiber dyeing generally contributes to high energy demand and is a key process in the textile industry.   Method: Solutions of ethanol, butanol, and phenylmethanol were used. Alcohol concentration during dyeing was set at 50 g/l, while the final dyeing temperature was 50°C. The samples obtained in these processes were compared with standard sample dyed at 5°C and 100°C.   Results and conclusion: The results showed that the K/S value for the standard sample was 31.4. The use of ethanol and butanol reduced the K/S values to 6.9 and 18.2, respectively. The best color yield is achieved with the use of phenylmethanol presenting a K/S value equal to 28.7 at a dyeing temperature of 50°C.   Research implications: The use of phenylmethanol contributed effectively to reducing the temperature of the dyeing process without causing significant changes in the chemical and morphological structure of the analyzed fibers.   Originality/value: This study highlights the efficiency of phenylmethanol in reducing the temperature of the dyeing process of polyamide fiber contributing to reducing the use of energy in the textile industry.