ISSN 2456-0235

​​​​​Vol. 2, No. 12, 2017, pp. 383-390. 

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​Reactive Dyeing of Cotton using Chitosan Extracted from Fish Scales  

Esubalew Kasaw, Gashaw Azene, Adane Haile, Rotich K. Gideon, G. Nalankilli*
Textile Chemistry Research and Innovation Centre, Ethiopian Institute of Textile and Fashion Technology (EiTEX), Bahir Dar University, Bahir Dar, Ethiopia.
​​​*Corresponding author’s e-mail: gnalankilli@yahoo.com

​Abstract

​Dyeing of cotton with reactive dyes requires alkali dye bath which requires more electrolytes for exhaustion leading to the environmental concerns during the release of effluent. One of the explored proposals to address this challenge is the salt free dyeing. In this paper, cotton fiber modification technique based on chitosan was studied. Chitosan used was extracted from discarded fish scales. From the study, chitosan demonstrated to be a successful in modification of cotton fabric enabling salt free dyeing with a reduction in dyeing temperature and time. Dyeing on chitosan treated cotton gave better color strength as compared to conventional dyeing method. The wash fastness was better than that of untreated cotton with values of 5 and 4/5, respectively, on a grey scale. The flexural rigidity of cationized Cotton showed lesser value than conventional indicating the treatment making cotton softer. Chitosan extracted from fish scales proved effective in supporting salt free dyeing of cotton fabric which translate to environmental protection.

Keywords: Cotton fabric; Salt free dyeing; Chitosan; Color strength; Fastness. 

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International Journal of Modern Science and Technology

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