?.Journal of Molecular Catalysis B:Enzymatic 1120011065–1072

http://www.doczj.com/doc/79a760d528ea81c758f57821.html r locate r molcatb

Biotreatment of desized cotton fabric by commercial cellulase and

xylanase enzymes

E.Csiszar ),K.Urbanszki,G.Szakacs ′′′

Technical Uni ?ersity of Budapest,P.O.Box 91,H-1521Budapest,Hungary

Abstract

Desized cotton fabric was subjected to biotreatment with seven commercial cellulase and hemicellulase enzymes in

non-agitated and agitated systems at 508C for 0.5–4h.The enzymes performed better in agitated bath than in non-agitated ?ones.All enzymes at 1g r l concentration in 2h caused weight loss less than 6%.Those three enzymes Celluclast 1.5,?..?.Cellusoft L and Cellulase EBT which exhibited the highest filter paper activity FPA showed the most aggressive action on cotton in agitated system at 1g r l concentration when time of treatment exceeded 2h.q 2001Elsevier Science B.V.All rights reserved.

Keywords:Cellulase;Hemicellulase;Cotton;Bioscouring;Degradation

1.Introduction

In the last decade natural biopolymer degrading or modifying enzymes are increasingly used in the tex-tile industry.Cellulases,hemicellulases and pecti-?nases acting on native cellulosic fibres cotton,flax,.hemp,jute,rami,etc.became the target enzymes in bioprocessing.The production of A aged B denim gar-ments with cellulases is the most successful enzyme process that has emerged in the textile industry in the last 10years.Each year approx.1billion jeans are produced and a big part of it is further finished to stonewashed fashion.The cellulase enzyme removes the cotton fragments from the surface of the garment

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Corresponding author.Tel.:q 36-1-463-1423;fax:q 36-1-463-3648.

?.E-mail address:emi.oct@chem.bme.hu E.Csiszar .

′and facilitates the abrasion of indigo dye from the

fibre surface.Traditional stonewashing process car-ried out by pumice stones was vastly replaced by enzymatic biostoning and fading or combined proce-w x dures 1.

Biofinishing or biopolishing represents another application of cellulases for non-denim cellulosic fabrics and garments.To various extents,all cellu-losic materials have a tendency to fuzz formation.Fuzz is the designation for short fibres protruding from the surface of the yarn and fabrics.Tradition-?ally,chemical agents cationic surface-active com-.pounds are used to decrease the fuzz formation.Alternatively,cellulosic fabrics can be subjected to treatments with cellulolytic enzymes,and the action of cellulases removes small loose fibre ends that w x protrude from the fabric surface 2.

Recently published results indicate that enzymes,mainly cellulases and several non-cellulolytic en-?.zymes lipases,proteases,pectinases may be used

1381-1177r 01r $-see front matter q 2001Elsevier Science B.V.All rights reserved.?.PII:S 1381-11770000149-1