ENZYMATIC TREATMENTS ON TEXTILE GOODS

ENZYMATIC TREATMENTS ON TEXTILE GOODS Southeast University School of Science and Engineering, Department of Textile Engineering Submitted by: Name ID Batch Md. Mazadul Hasan Sheshir 2010000400008 13th 2ENZYMATIC TREATMENTS ON TEXTILE GOODS Southeast University Department Of Textile Engineering I/A 251,252 Tejgaon Dhaka Bangladesh Southeast University School of Science and Engineering, Department of Textile Engineering Abstract • Amylase, Protease, Cellulase, Catalase, Laccase, Pectinase etc. are widely used in textiles. In Bangladesh we found the use of amylase, cellulase, catalase widely rather than other enzymes. we have described many aspects of application of enzymes in textile with application methods, conditions, mechanisms and affects on the end products & environment with experimental data. Health and safety issues also included here. • We have studied the effect of bio-polishing by using acid stable cellulase enzyme in different circumstances. 3ENZYMATIC TREATMENTS ON TEXTILE GOODS Southeast University School of Science and Engineering, Department of Textile Engineering Enzyme • Enzyme is specialized high molecular weight protein produced within an organism, which is capable of catalyzing specific chemical reaction. They are also known as "Biocatalyst". 4ENZYMATIC TREATMENTS ON TEXTILE GOODS Southeast University School of Science and Engineering, Department of Textile Engineering ENZYMATIC TREATMENTS ON TEXTILE GOODS 5 Source of enzyme: 1. Vegetable source 2. Bacterial source 3. Animal source Classification of enzyme: 1. Oxidoreductase 2. Transferase 3. Hydrolase 4. Lyase 5. Isomerase 6. Ligase or Synthetase The history of enzymes in textile: • Amylase at desizing in 1952 • Catalase at bleach cleanup in 1993 • Pectinase at bio-scouring in 2003 Southeast University School of Science and Engineering, Department of Textile Engineering 6 Lock and key model Induced fit model Southeast University School of Science and Engineering, Department of Textile Engineering Enzymes used in textile processing Process Types of enzyme used Desizing Amylase Scouring Pectinase Peroxide killing Catalase Denim bleaching Laccase Bio polishing Cellulase Anti-shrink & Anti-felting on wool Protease ENZYMATIC TREATMENTS ON TEXTILE GOODS 7 Southeast University School of Science and Engineering, Department of Textile Engineering ENZYMATIC TREATMENTS ON TEXTILE GOODS 8 • Hydrolase class of enzyme. • Used for desizing. • Hydrolyses 1-4 α glucosidic linkage of amylase and amylopectin of starch to convert them into soluble dextrins. Amylase Process of desizing with amylase: ENZYMATIC TREATMENTS ON TEXTILE GOODS 9 Mechanism of starch breakdown with amylase Southeast University School of Science and Engineering, Department of Textile Engineering ENZYMATIC TREATMENTS ON TEXTILE GOODS 10 • Hydrolase class of enzyme. • Used for bio-polishing and stone washing effects. • Used in detergent formulations to enhance detergency, improve brightness & remove microfibrils. Cellulase [...]... given after dyeing • Pilling tendency decreases with application of enzyme • One bath bio-polishing effect is not as good as the two bath method ENZYMATIC TREATMENTS ON 22 Southeast University Conclusion School of Science and Engineering, Department of Textile Engineering • Chemical processes have inherent drawbacks from commercial and environmental point of view • Harsh and hazardous chemical processes... Catalase University • Oxidoreductase Engineering, Department of Textile Engineering School of Science and class of enzyme • Catalase is used for the removal of H2O2 after bleaching • One catalase molecule can convert 40 million molecules of hydrogen peroxide to water and oxygen per second Efficiency of H2O2 removal* Conventional process Process Enzymatic process Residual peroxide, Process Residual peroxide,... 4 4 4 3 3 4 4 4 Pilling rating ENZYMATIC TREATMENTS ON 20 Southeast University Effects of enzyme treatment on dyeing property School of Science and Engineering, Department of Textile Engineering Results Properties Concentration of Enzyme 1% 2% 3% Enzymes treatment after dyeing 1% 2% 3% Enzyme treatment before dyeing Weight loss (%) 0.77 1.23 1.89 0.79 1.25 1.93 Abrasion (mm) 0.04 0.07 0.08 0.05 0.06... University Mechanism of cellulase enzymes on cellulosic Fibers School of Science and Engineering, Department of Textile Engineering There are four main actions1 Endocellulase cleave the long cellulose chains randomly to produce two shorter chains 2 Exocellulase attack one end of the cellulose chain, cleaving one glucose unit at a time 3 Cellobiohydrolase similarly act on one end of the cellulose chain, producing... 0.06 0.09 Wash fastness 4 4-5 4-5 2-3 3 3-4 Pilling rating 3 4 4 3 4 4 9.6 8.9 8.1 9.9 9.9 9.9 K/S Values ENZYMATIC TREATMENTS ON 21 Southeast University Discussion School of Science and Engineering, Department of Textile Engineering • The best result is obtained at 1:10, M : L and 3% concentration • Enzyme shows maximum activity at pH (5 – 5.5) & 55 °C temperature But optimum bio-polishing is obtained... and Engineering, Department of Textile Engineering Bio-polishing recipe: BP Nano(Cellulase) : 0.9 g/l Acetic acid : 1 g/l T-100 (Peroxide killer) : 0.08 g/l Securon 540(Seq agent) : 0.25 g/l Temperature : 55-60 °C Time : 40-60 min pH : 4.5-5 ENZYMATIC TREATMENTS ON Southeast University Process flow chart of bio-polishing School of Science and Engineering, Department of Textile Engineering Bio-polishing... Engineering, Department of Textile Engineering Used for bio-scouring BOD & COD are (20-45)% of alkaline scouring (100%) TDS is (20- 50)% of alkaline scouring (100%) Handle is very soft compared to harsh feel in alkaline scouring • Highly suitable for blends containing fibers like wool, silk, viscose, modal, lyocell, lycra etc Semi-continuous pad-steam process ENZYMATIC TREATMENTS ON Southeast Catalase University... pressure, acidity, or alkalinity, need high capital investment and specially designed equipment and control systems • Enzymes have contributed to more environmentally adapted processes because they are bio-degradable, they can replace harsh chemicals and they reduce high temperatures & pressures ENZYMATIC TREATMENTS ON 23 Thanks for being with us ... 0.5 0.5 Catalase, 20 min 0 Before dyeing * Source- Novozymes(1000 kg of fabric, liquid ratio 1:10); ENZYMATIC TREATMENTS ON Southeast University Scouring: Sodium Hydroxide : 2.5 % Sodium Carbonate : 1% Cidascour LTJ : 0.5 % Wetting agent : 0.5 % 0.2 % School ofSodium hexametaphosphate : Department of Textile Engineering Science and Engineering, Temperature : 80 °C Time : 4 – 5 hours pH : 9 – 10 M:L... Engineering, Department of Textile Engineering Southeast University Result School of Science and Engineering, Department of Textile Engineering Factors affecting bio- polishing Properties Concentration 1% 2% 3% Temperature pH 45°C 50°C 55°C 4-5 5-6 M:L Time (min.) 6-7 1:10 1:15 1:20 40 50 60 Weight loss (%) 0.77 1.46 2.12 1.03 1.45 2.56 1.21 1.1 0.93 1.12 0.62 0.51 1.01 1.42 2.48 Abrasion (mm) 0.06 0.08 0.09 . Anti-felting on wool Protease ENZYMATIC TREATMENTS ON TEXTILE GOODS 7 Southeast University School of Science and Engineering, Department of Textile Engineering ENZYMATIC TREATMENTS ON TEXTILE GOODS 8 • Hydrolase. reaction. They are also known as "Biocatalyst". 4ENZYMATIC TREATMENTS ON TEXTILE GOODS Southeast University School of Science and Engineering, Department of Textile Engineering ENZYMATIC. Department of Textile Engineering ENZYMATIC TREATMENTS ON TEXTILE GOODS 10 • Hydrolase class of enzyme. • Used for bio-polishing and stone washing effects. • Used in detergent formulations to enhance