|
Title
Impact of cellulase enzyme treatment on strength morphology and crystallinity of deinked pulp
Authors
ZAHRA EFRATI MOHAMMAD TALAEIPOUR ALIREZA KHAKIFIROUZ and BEHZAD BAZYAR
Received
January 30, 2012
Published
Volume 47 Issue 7-8 July-August
Keywords
enzyme, cellulose, deinked pulp, drainage degree, WRV, strength, morphology, crystalinity
Abstract
In recent years, enzyme applications in the pulp and paper industry have become remarkable. In this research,
Trichoderma cellulase was used on deinked pulp and its effects on fiber morphology, crystallinity and strength of pulp
were studied. Three parameters were considered: dosage of enzyme, time and temperature of enzymatic treatment. The
results showed that the enzymatic treatment enhanced the mechanical properties of the treated pulps. Also, water
retention value and drainage were improved by the cellulase treatment. The effect of the enzymatic treatment on the
drainage of pulp showed that pulp drainability was improved. The results of handsheet and pulp evaluation indicated
that 0.3% cellulase treatment for 60 minutes of at 30 °C were the optimum treating conditions. In treated pulps,
structural changes, such as fibrillation, were observed by SEM. The measurement of X-ray diffraction indicated that the
crystallinity index of treated pulp was lower than that of the control pulp.
Link
|
