Page 293 - Advances in Textile Biotechnology

274 Advances in textile biotechnology

the XG chain by transglycosylation (Fig. 11.3) (Fry, 1997; Fry et al., 1992;
Nishitani, 1992). Inspired by these observations, our laboratory has further
developed this system as a biomimetic method to alter cellulosic fi bre
surface chemistry (Teeri et al., 2007; Zhou et al., 2007).

XG
R
R R XGO-R
R

a
XET

R R
R
R
XG-R

b Cellulose surface

R R
R R

c

R′ R′ R′
R′
R R
R R

11.3 The use of XET and XG for cellulose modification: (a) XET

produces modified XG (XG-R) by transglycosylation of XG onto

XGO-R; (b) subsequent adsorption of XG-R from aqueous solution,
driven by the strong cellulose–XG interaction, brings the functional
group onto the cellulose surface; and (c) further reactions of surface-
bound R groups are possible with appropriate reagents, including
photoactivation, electrophilic/nucleophilic reactions, grafting from
polymerization, and biomolecule capture.

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