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- Title
NOVINE KOD BOJENJA TKANINE OD PRIRODNE CELULOZE DIREKTNOM BOJOM.
- Authors
Nikodijević, Milena; Vučković, Nemanja; Đorđević, Dragan
- Abstract
In this paper was investigated the influence of various factors on the dyeing of natural cellulose fabric with direct dye. The dyeing was realiyed in laboratory's conditions with the tendency to trasfer and apply results in the industry. The applied fabric is 100% natural cellolose fabric derived from linen fibers was used. In this study, the samples of natural cellulose fabricf of linear density of warp and weft 73 and 63 tex (units for fineness) and surface mass of the fabric 238 gCm-2 have used. Flax is a natural cellulose fiber and is one of the oldest textile fibers that people used to make fabrics for clothing and other needs. The fibers has dyed with a direct dye with specific structure that has a predisposition to connect to this fiber. Direct dyes, by chemical composition, are mainly sulfonated azo compounds which are derived from benzidine and its derivatives or amines type like diaminostilbene. All direct dyes are soluble in water, but some of them are soluble in low-alcohol solution. Samples were dyed at a temperature of 80 °C. The dependent variable is the dye concentration on the fiber, ie. the concentration of the dye in the solution after dyeing, while the factors that influence one the dyeing of the fabric, such as: color choice, temperature, time, additives-salts, etc., are taken as independent variables. The results reveal the flow of the direct dye adsorption process on the fabric, as well as the capacity and energy of the adsorption to optimize the dyeing process with maximum performance and minimum cost. With the increase in dye concentration during dyeing, the degree of exhaustion decreases while the longer dyeing time gives a higher degree of dye exhaustion. The variation in adsorbed amount of adsorbate increases with increasing initial concentrations and time. Longer dyeing time causes a higher amount of adsorbed dye per unit mass of natural cellulose fabric. At the highest concentrations of dye and the longest dyeing time, the highest absorption occurs. By modeling the fabric dyeing process, it was found that the Freundlich nonlinear and linear isotherms are most effective in simulating isothermal adsorption. The parameters of the Freundlich model depend on the amount of adsorbent and the temperature. Temperature can affect several aspects of adsorption: color solubility, adsorbent-fabric swelling ability, and equilibrium position relative to the exotherm of the adsorption phenomenon. According to the results of research in laboratory conditions and statistics, more economical dyeing of natural cellulose fabric can also be achieved in industry, which of course requires the adaptation of recipes to the new space and equipment. Modeling the dyeing process, new data are emerging that relate dye concentration, temperature, the presence of electrolytes, and the efficacy of the dyes achieved on the fabric, that is, the amount of waste dye remaining in the bath after dyeing.
- Publication
Knowledge: International Journal, 2019, Vol 35, Issue 3, p1015
- ISSN
2545-4439
- Publication type
Article