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2 Polish Journal of Environmental Studies

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The dyeing process and the environment: enhanced dye fixation on cellulosic fabric using newly synthesized reactive dye

100%

Siddiqua U. H. , Ali S. , Hussain T. , Bhatti H. N. , Asghar M.

Polish Journal of Environmental Studies

2017

tom 26

nr 5

New types of dyestuff moieties are being introduced to get the ease in imparting color to various substrates and sorting out the ways to improve the quality of dyed fabric using environmentally friendly techniques. To contribute to this research effort, the present study was carried for dyeing cellulosic fabric using novel bi-functional reactive dye. The synthesized dye contained sulphatovinylsulfone and monochlorotriazine functionality. The important influencing parameters for the exhaust method, e.g., dyeing temperature, concentration of salt, and alkali were optimized and their interaction was studied using central composite design. The results indicated that 61.5ºC was found to be suitable for the maximum exhaustion and fixation of the dye on cotton fabric. The optimum concentration of salt (30.01 g/L) and alkali (22.32 g/L) for dye experimentally resulted in 84.98 (±3)% of exhaustion and 79.00 (±3)% fixation on cellulose fabric. Fastness properties were good-to-excellent for the novel reactive dye applied on cotton fabric. A comparison of the results with the commercial reactive dye showed that attained results were within a practical range suitable for commercial dyeing.

Statistical modeling for the extraction of dye from natural source and industrial applications

72%

Jabeen S. , Ali S. , Nadeem M. , Arif K. , Quereshi N. , Shar G. A. , Soomro G. A. , Iqbal M. , Nazir A. , Siddiqua U. H.

Polish Journal of Environmental Studies

2019

tom 28

nr 4

This study is intended to scrutinize the consequence of extraction conditions of Lawsonia Inermis (henna) leaves on the color strength values of dyed fabric. Extraction pH, M:L ratio, and time were optimized using central composite design (CCD) under response surface methodology (RSM). We investigated how the maximum colour strength values were obtained at pH 6.64 in about 78 minutes extraction with an M:L ratio of 1:44. ANOVA results showed that all the extraction parameters significantly affect the colour strength values of dyed samples. 99% variation in the response was indicated in the 2nd-order regression equation for K/S. The fastness properties with respect to light, washing, and rubbing were quite satisfactory of dyed samples under optimized extraction conditions.