Cationisation of Cotton and Study of Kinetics and Thermodynamics Properties of its Dyeing with Anionic Dye

Description

– Cationisation of Cotton and Study of Kinetics and Thermodynamics Properties of its Dyeing with Anionic Dye –

Download Cationisation of Cotton and Study of Kinetics and Thermodynamics Properties of its Dyeing with Anionic Dye. Textile Science and Technology students who are writing their projects can get this material to aid their research work.

Abstract

Conventional cotton textiles dyed with direct dyes suffer from the problems of poor exhaustion and moderate to poor washing fastness due to the weak dye-fibre binding forces of hydrogen bonding and Vander Waals attractions.

In addition, the dye effluent contains large amounts of dissolved and undissolved electrolytes which are harmful to the aquatic environment.

In this work an attempt is made to change the dye-fibre binding force to that of ionic or electrostatic bonding (stronger bond) through cationisation (i.e. imparting positive charge) on the cotton.

Introduction

Cotton fibres grow around seed of cotton plants; it is hydrophilic in nature and dominantly the most abundant source of clothing the world over.

Length of cotton fibre ranges from 10- 35mm; depending on quality and cotton variety, it has length to width ratio of 3×10⁴μm by 15μm.

Generally colour of raw cotton varies from creamy white to grey depending on climatic conditions and the environment it was grown.

Native cotton consists of aggregated fine micro fibrils which are flexible and are attracted to each other by hydrogen bonds. These fibrils crystallize into lamellae (sheets) Adam. (2000), Chavan et al.,( 1998).

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