respectively, with concentration ranges from critical micelle concentration
(CMC, 0.015–0.2 g/L) to 5 g/L. As shown in Fig. 1(a),
hydrolysis of FP was somewhat improved by addition of the surfactants
at CMC, but no significant improvement was found for MCC.
When surfactant concentration increased to 0.5 g/L, no significant
improvement was found for Tween and Triton in cellulose conversion
of FP, while PEG 4000 still showed some positive effect. However,
Triton showed some improvement for MCC, while others had
no significant effect on cellulose hydrolysis. When surfactant concentration
was increased to 1 g/L, negative effects were observed,
especially for Tween 20 and 80. This inhibitive effect became more
significant at late phase of hydrolysis