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- Title
THERMAL AGEING OF DIFFERENT KINDS OF FIBER MATERIALS: A KINETIC STUDY.
- Authors
Boeva, R.; Radeva, G.; Hinkov, P.; Hinkov, E.
- Abstract
The aim of this work is to study the kinetics of the process of thermal ageing of fiber materials from the hard wood pulps with different degree of delignification. The investigation has been performed at the temperature of 105 °C, the brightness reversion is recorded from the 2nd hour till the 24st process hour. It is found that the ageing process is best described by the exponential kinetic equation which refers to processes taking place on uniformly inhomogeneous surfaces. The coefficient of inhomogeneity and the values of the initial rate have been estimated. The current rate of the process decreases due to changes occurring in the chemical composition of cellulose and destruction of the structure of the fiber material. It was found that the bleached pulps aged more slowly.
- Subjects
HARDWOODS; TEMPERATURE; EQUATIONS; PULPWOOD; BLEACHING (Chemistry)
- Publication
Journal of the University of Chemical Technology & Metallurgy, 2012, Vol 47, Issue 1, p37
- ISSN
1311-7629
- Publication type
Article