N-Octyl Chitosan-A Promising Biomaterial for Sustainable Cotton Textile Functionalization

Abstract

Firoz Ahmed, Md Ibrahim H Mondal, Joykrisna Saha and Pranab Kumar Das

The purpose of the present study is to develop a biomaterial from renewable source for its effective application on cellulosic textile fibre functionalization instead of synthetic toxic products. In this context, we have prepared a water-soluble bioactive compound N-octyl chitosan from prawn shell waste. The molecular weight of prepared chitosan and N-octyl chitosan were 139,958 Da and 162,181 Da respectively. Chitosan and N-octyl chitosan were applied on cotton fibre and characterized by various physico-chemical and instrumental techniques, e.g. FTIR, SEM, TGA, DTA, DTG, XRD etc. Thermal behavior of chitin, chitosan, N-octyl chitosan, cotton, chitosan modified cotton and N-octyl modified cotton were investigated and also followed the order cotton> chitin> chitosan> chitosan-modified cotton> N-octyl chitosan modified cotton fibers. Finally, functionality of cotton fibre was measured by dyeing performance which in turn was evaluated by controlling the percentage of the dye bath exhaustion (E %). The modified cotton fibers showed excellent dye exhaustion and colorfastness properties as well as other textile properties.

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