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Enzymes in textile preparatory process
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Enzymes in textile preparatory process

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    Enzymes in textile preparatory process Enzymes in textile preparatory process Presentation Transcript

    • ENZYMES IN TEXTILE PREPARATORY PROCESS
    • INTRODUCTION ENZYMES ARE BIOLOGICAL CATALYST. ACCELERATE THE RATE OF CHEMICAL REACTION WITHOUT UNDERGOING ANY PERMANENT CHEMICAL CHANGE . THE TERM ‘ENZYME‘ COMES FROM THE GREEK ENZUME. FIRST USED BY KUHNE IN 1878. FIRST ENZYME –’UREASE’ FROM JACK-BEAN ,PURIFIED AND CRYSTALLISED BY JAMES SUMNERM OF CORNELL UNIVERSITY.
    • CONTD… ENZYMES ARE PROTEINS ,COMPOSED OF FOLDED PEPTIDE CHAINS CONTAINING A WIDE RANGE OF AMINO ACIDS. HIGH SUBSTRATE SPECIFICITY OF ENZYMES IS DUE TO THE INDIVIDUAL ARCHITECTURE OF THE ACTIVE SITE WHERE ONLY CERTAIN MOLECULES CAN PERFORM THEIR REACTION.
    • FUNCTIONS OF TEXTILE PROCESSING ENZYMESDESIZING COTTON WITH AMYLASES AMYLASES ARE USED AS DESIZING AGENTS TO REMOVE STARCH FROM FABRICS AFTER WEAVING. STARCH IS A POLYSACCHARIDE COMPOSED OF GLUCOSE UNITS PRIMARILY LINKED BY ALPHA(1-4)GLUCOSIDIC BONDS WITH ALPHA(1-6)LINKEDSIDE CHAINS. ENZYMES INVOLVED IN THE COMPLETE DEGRADATION OF STARCH ARE ALPHA-AMYLASES ,BETA-AMYLASES AND GLUCOAMYLASE. THE OPTIMUM pH LIES BETWEEN 5 AND 7. ENZYMATIC DESIZING IS PRACTISED HIGH LEVELS OF DYE FASTNESS ARE DEMANDED.
    • ENZYMATIC REMOVAL OF HYDROGEN PEROXIDE THE ENZYME CATALASES PLAY A VITAL ROLE IN TEXTILE INDUSTRY. THEY ARE USED TO GET RID OF HYDROGEN PEROXIDE . THIS IS MAINLY DONE BECAUSE REMOVAL OF HYDROGEN PEROXIDE TENDS TO REDUCE WATER CONSUMPTION WHILE WASHING THE BLEACHED COTTON.
    • ENZYMATIC SCOURING OF COTTON SCOURING IS THE PROCESS OF REMOVING NATURAL AND ADDED IMPURITIES ,TO IMPROVE THE COTTON PROPERTIES. ENZYMES USED ARE LIPASES,PECTINASES,PROTEASES, CELLULASES AND THEIR MIXTURES. THE MAJOR ADVANTAGES OF USING ENZYMES IS THAT IT REDUCES WATER AND ENERGY CONSUMPTION.