Abstract
In this paper, synthesis of N,N,N-Trimethyl chitosan chloride (TMCHT) and its effect on the properties of cotton fabric is reported. TMCHT of varying degree of quaternization (DQ) namely 13.41, 22.03, and 50.92% were synthesized by reaction of chitosan (CHT) with methyl iodide in alkaline medium followed by ion exchange with sodium chloride. The quaternization at amino groups of CHT was confirmed by FTIR spectroscopy and the degree of quaternization was evaluated by conductometric titration against standard silver nitrate solution. TMCHT was applied onto cotton fabric by pad-dry cure method and its effect on various properties such as appearance, feel, chlorine retention in chlorine bleaching, absorbency, dyeing behavior, wrinkle recovery, soil release, and antimicrobial properties were investigated. The whiteness index, absorbency, dyeability toward direct and acid dyes at neutral dye bath pH, soil release, and resistance towards microbial attack of the treated fabrics were found to be progressively improved with rise in DQ of TMCHT.
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