Page 344 - Advances in Textile Biotechnology

Hydrolysis of regenerated cellulose fi bres for textiles 325

occurs and with use of stronger swelling agents, e.g. alkali solutions, intra-
crystalline parts begin to reorganise, thus yielding modifi ed fi bre properties
such as porosity, accessibility and reactivity (Bui et al., 2008b; Jaturapiree

et al., 2008). Changes in fibre structure and morphology also infl uence the
observed reactivity of enzymes for cellulose hydrolysis. As these changes

are more distinct in regenerated cellulose fibres, than in cotton fi bres, the
effects of preceding treatments in swelling solutions on enzyme hydrolysis
rate are more critical for man-made cellulose fi bres.
For technical processing, this interlinkage between effects of pretreat-
ment (drying steps, alkali treatments, crosslinking operations, dyeing with
bifunctional reactive dyes) and the fi nal result of an enzyme treatment has
to be considered to achieve stable and reproducible process conditions.

13.9 References

abu-rous m, varga k, bechtold t and schuster k c (2007), A new method to visu-
®
alize and characterize the pore structure of TENCEL (lyocell) and other man-
made cellulosic fibres using a fluorescent dye molecular probe, J Appl Polym Sci,

106, 2083–2091.
andreaus j, campos r, gübitz g and cavaco-paulo a (2000), Influence of cellulases

on indigo backstaining, Text Res J, 70(7), 628–632.
anon. (2008), Chemiefasern – Kapazitätsausbau in China, Melliand Textilberichte,
89(11–12), 421.
bredereck k and gruber m (1995), Die Behandlung von Baumwolle und Cellu-
loseregeneratfasern mit Cellulase – Veränderungen von Quellverhalten und
Porenstruktur, Melliand Textilberichte, 76, 684–691.
bui h m, ehrhardt a and bechtold t (2008a), Pilling in cellulosic fabrics, Part 2: a
study on kinetics of pilling in alkali-treated lyocell fabrics, J Appl Polym Sci, 109,
3696–3703.
bui h m, lenninger m, manian a p, abu-rous m, schimper c b, schuster k c and
bechtold t (2008b), Treatment in swelling solutions modifying cellulose fi bre
reactivity – Part 2: accessibility and reactivity, Macromol Symp, 262, 50–64.
buschle-diller g and zeronian s h (1994), Enzymatic and acid hydrolysis of
cotton cellulose after slack and tension mercerisation, Text Chem Color, 25(4),
17–24.
buschle-diller g, zeronian s h, pan n and yoon m y (1994), Enzymatic hydrolysis
of cotton, linen, ramie, and viscose rayon fabrics, Text Res J, 65(5), 270–279.
carrillo f, colom x, lopez-mesas m, lis m j, gonzales f and valldeperas j (2003a),

Cellulase processing of lyocell and viscose type fibres: kinetics parameters, Process
Biochem, 39, 257–261.
carrillo f, colom x, valldeperas j, evans d, huson m, and church j (2003b),
Structural characterisation and properties of lyocell fibres after fi brillation and

enzymatic defi brillation fi nishing treatments, Textile Res J, 73(11), 1024–1030.
cavaco-paulo a (1998), Mechanism of cellulase action in textile processes, Carbo-
hyd Polym, 37, 273–277.
cavaco-paulo a and guebitz g (2003), Textile processing with enzymes, Woodhead.
Publishing Limited, Cambridge, UK.

© Woodhead Publishing Limited, 2010