Milena Miljkovic

The influence of pH adjusted with different acids on the dyeability of polyester fabric

Abstract The influence of using formic, oxalic, citric, tartaric, hydrochloric, nitric, sulphuric and phosphoric acid for dyebath pH adjustment was investigated upon the dyeing of polyester fabric with CI Disperse Yellow 60. The positions of colour in CIELab coordinates of the samples dyed with the addition of tested acids were assessed and compared to those dyed with the addition of acetic acid. It was found that the differences in dyeabilities obtained with the addition of citric, oxalic, hydrochloric, nitric and sulphuric acid are entirely acceptable according to both M&S 83A and CMC (2:1) standards in comparison to the dyeability obtained with the addition of acetic acid.

The effects of ultrasonic energy on reactive dye absorption in the presence of reduced quantities of salt

Ultrasonic energy has shown a wide range of application possibilities in many fields of human craftsmanship, and its application in textile industry has been a matter of research for a number of years. For the time being, the best results have been achieved in other research still being done in laboratories. This paper presents a part of the overall research done within the project ‘‘Modern Approaches in New Dyeing Procedure Development for Optimal Pollution of the Environment,’’ financed by Science and Technology Ministry of Serbia. One of the predetermined objectives of the project is to examine the possibility of ultrasonic energy application in technological processes of dyeing cellulose fabrics by vinylsulphonic dyes. Having that in mind, it is necessary to systematically investigate all of the aspects of ultrasonic energy effects on textile substrata, the dye, and the relation of dye solution and fiber. In the experiments, cellulose microfiber knitwear has been dyed with vinylsulphonic dyes accordin...

The effects of ultrasonic waves on dye penetration with cellulose fabrics dyed by vinylsulphonic dyes

Research has shown that ultrasound traveling in the form of waves through liquids causes the effect of cavitation. Cavitation is manifested in a continuous creation and disappearance of vacuums within the liquid. Therefore, interruptions are created in the liquid, that is, strong forcing waves are made. The cavitation strikes are used in solid matter destruction, emulsion creation, greasy surface cleansing, and the like. The ultrasonic energy has been applied in textile industry, for the most part in soaking processes, and textile washing and cleaning. There is research indicating that ultrasonic energy can be used in dyeing of cotton with direct and reactive dyes, of polyamid and wool with acid dyes, and of polyester and acetate fibers with disperse dyes. Based on previous research, this paper is an account of an experiment whose aim was to implement the latest achievements in vibration and ultrasonic theory in textile dyeing technologies. Thus cotton knitwear has been dyed with vinylsulphonic reactive d...