Effect of Acid Cellulase at Different Concentration and Parameters on Wet Processing of Knitted Fabric Part-1

Effect of Acid Cellulase at Different Concentration & Parameters on Wet Processing of Knitted Fabric
AUTHORS: MD ALI KAIUM, DIPONKAR TARAFDAR, BULBUL AHMED, DURJOY DAS, H A M EHSANUL HAQUE, PROTIK CHAKMA, AKTER HOSSAIN, TANVIR KHAN, AZMI AKTAR, RIFAT JARIN
TEXTILE ENGINEERING COLLEGE, NOAKHALI




Abstract:
Cellulase enzymes are nontoxic and environmentally friendly biocatalysts. They are capable of significantly improving the hand and appearance properties of cellulosic materials. As biotechnology makes rapid progress concerning the availability of these enzymes and their application conditions, this finishing process has reached enormous industrial importance over the past few years. Celluloses perform best at a specific pH range and a temperature around 40-55°C, and both tolerable temperature and pH have become much more flexible. As biocatalysts, very small amounts are sufficient to accelerate a specific reaction. The enzymes are not consumed during this reaction. Their deactivation is performed by a simple shift in temperature or pH. For this project commercially available acid cellulase enzyme systems were used. The treatments were carried out on 100% cotton knitted fabric. Try to show effect of acid cellulase at different concentration in this study. Also try to show some effect on the color fastness properties of the cotton knitted fabric.

Introduction

REVIEW:
Textile processing has benefited greatly in both environmental impact and product quality through the use of enzymes. From the 7000 enzymes known, only about 75 are commonly used in textile industry processes (Quandt & Kuhl 2001).The principal enzymes applied in textile industry are hydrolases and oxidoreductases. The group of hydrolases includes amylases, cellulases, proteases, pectinases and lipases/esterases. Amylases were the only enzymes applied in textile processing until the 1980s. These enzymes are still used to remove starch-based sizes from fabrics after weaving. Cellulases have been employed to enzymatically remove fibrils and fuzz fibres, and have also successfully been introduced to the cotton textile industry. Further applications have been found for these enzymes to produce the aged look of denim and other garments
Enzyme
BASIC DEFINITION :
  • ENZYMES – Greek word “ENZYMOS” Meaning – in the cell / from the cell.
  • Enzymes – Proteins composed of amino acids produced by all living organisms.
  • Responsible for number of reaction & biological activities.
  • Molecular weight is high & they are specific in their action. Effectiveness depends on their environment: pH , temperature, time, presence of electrolyte.
  • Major functions- hydrolysis, oxidative, reduction coagulation & decomposition.
USES OF ENZYMES IN TEXTILE:
  1. Amylase → (desizing) → Used for cotton fabric to remove starch
  2. Cellulase→ (Washing) →Bio-finishing cellulosric fabric & garments.
  3. Pectinase → (Scouring) →PH : 8-9, Temp : 65 oC(BIO-SCOURING )
  4. Catalase Hydrogen per oxide killer.
  5. Laccase Used for oxidation of dyes such as indigo.
  6. Protease Used for protein fiber, wool, silk degumming
ACCORDING TO THE BIOLOGICAL SOURCE ENZYMES ARE TWO TYPES:
1) Animal / pancreatic: Degamma, Novofermosol, trypsin.
  • Temperature: 50-55
  • PH : 7-7.5
  • Concentration : 1-5 g/l
2) Vegetable: It has also two types

a) Malt extract : Maltoferment, Diastase, Deglatol.
  • Temperature: 55-60
  • PH : 5.5-6.5
  • Concentration : 3-20 g/l
b) Bacterial : Acry, Biolase, Rapidase.
  • Temperature: 65-70
  • PH : 5.5-7.5
  • Concentration : 0.5-3 g/l
CHARACTERISTICS OF ENZYMES :
  • Used during the process & can be recovered at the end.
  • Requires low activation energy – reaction conditions are close to the ambient.
  • Sharp control over process conditions. Very sensitive to PH & temperature variations.
  • Eco-friendly & accomplish their work quickly and efficiently without leaving any pollutions behind.
ENZYME & THEIR ATTACKING ZONE:

NAME
ATTACKING ZONE
1. Amylase
Amylase splits amylose into dextrin & sugar.
2. Cellulase
Degrade cellulose to soluble product
3. Pectinase
Degrade pectine
4.Catalase
Convert H2O2 into H2O & O2
5. lipase
Split fats into glycerol & fatty acid
6. protease
Splits protein into soluble polypeptides & aminoacids.



1  2  3  4


0 comments:

Comment here

Textile Learner is the largest Textile Blog over the net. It is an ultimate reference for textile students. It describes textile articles in comprehensive. It also supplies news on latest textile technology, educational institute news of the world.