This is a full project materials on The Effect Of Scouring On Dye Absorption Of Hundred Percent Cotton Fabric
ABSTRACT
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This research work examined the effect of scouring on vat dye absorption of 100% cotton fabric. In the practical work, the researchers desized grey fabric using diastase and then share the fabric into two equal part, one of them was scoured with five percent concentration of sodium hydroxide and the other part was dyed with vat dye (Cibracron Green) under the same concentration.
Four test were carried out on the dyed fabric i.e. washing fastness, rubbing fastness, light fastness and floatation test. The results of these test showed that the scoured fabric has better fastness grading and aesthetic appearance than the desized fabric and also possessed better absorbance of both water and dye It was discovered that scoured fabric will need little amount of dye to produce a better shade due to the fact that the fabric possessed on impeding impurity to dye absorption and leveling.
TABLE OF CONTENT
Title Page
Declaration
Approval Page
Dedication
Acknowledgement
Table of contents
CHAPTER ONE:
INTRODUCTION
1.1 Background Of Study
1.2 Aims And Objective
1.3 Statement Of The Problem
1.4 Problem Of The Study
1.5 Significant Of Study
1.6 Scope Of The Study
1.7 Limitation Of Study
1.8 Definition Of Terms
CHAPTER TWO:
LITERATURE REVIEW
2.1 Cotton Fiber
2.2 History Of Cotton Fiber
2.3 Composition Of Cotton Fiber
2.4. Chemistry Reactivity And Moisture Absorption Phenomenon Of Cotton
2.5 Heating Effect on Cotton
2.6 Dye Absorption
2.7 Fixation-
2.8 Vat Dye
2.9 Oxidation
2.10 The Chemistry Reduction Of Vat Dye
2.11 Chemical Structure And Composition Of Vat Dye
2.12 Properties Of Vat Dye
2.13 Scouring Of Cotton Fabric
CHAPTER THREE:
EXPERIMENT
3.1 Desizing
3.2Desizing Aim
3.3 Desizing Apparatus
3.4 Desizing Reagent
3.5 Desizing Recipe
3.6 Desizing Procedure
3.7 Scouring
3.8 Scouring Aim
3.9 Scouring Apparatus
3.10 Scouring Recipe
3.11 Scouring Procedure
3.12Dyeing
3.13 Dyeing Aim
3.14 Dyeing Apparatus
3.15 Dyeing Recipe
3.16 Dyeing Procedure
3.17 Washing Fastness
3.18 Washing Fastness Aim
3.19 Washing Fastness Apparatus
3.20 Washing Fastness Recipe
3.21 Washing fastness procedure
3.22 Rubbing Fastness
3.23 Rubbing Fastness Aim
3.24 Rubbing Fastness Apparatu
3.25 Rubbing Fastness Material
3.26 Rubbing Fastness procedure
3.27 Light Fastness
3.28 Light Fastness Aim-
3.29 Light Fastness Apparatus
3.30 Light Fastness Material
3.31 Light Fastness Procedure
3.32 Floatation Test
3.33 Floatation Aim
3.34 Floatation Apparatus
3.35 Floatation Procedure
CHAPTER FOUR:
RESULTS AND DISCUSSION OF RESULT
4.1 Washing Fastness Test
4.2 Light Fastness Test
4.3 Rubbing Fastness Test
4.4 Floatation Test
CHAPTER ONE
INTRODUCTION
1.1 Background of the Study
Fabrics made of native cellulose fibers contain impurities that have to be removed through a number of processes prior to dyeing. One of the important steps is scouring, in which the complete or partial non-cellulosic components found in cotton are removed, as well as impurities such as machinery and size lubricants (Madaras, 1993;Bae, 1997).
Scouring gives superior wettability to the fabrics for successful bleaching and dyeing (McCaffery et al., 1997). Nowadays, highly alkaline chemicals, such as sodium hydroxide, are usually used for scouring in textile finishing production. These chemicals not only remove the impurities, but also attack the cellulose, leading to a reduction in strength, fabric weight loss(krassig, 1992).
Furthermore, the resulting waste-water has a high COD (chemical oxygen demand), BOD (biological oxygen demand) and salt content. However, textile producers today have the possibility of applying a new, effective alternative to chemical scouring, with the enzyme and various other combined processes such as scouring and bleaching (Burget et al,1994:Buschle-Diller et al., 2001).
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