gamma-radiation induced changes in the physical and chemical properties
of lignocellulose
Biomacromolecules, 7 (8):
2303-2309 (2006)Zusammenfassung
gamma-radiation induced effects on the physical and chemical properties
of natural lignocellulose ( jute) polymer were investigated. Samples
were irradiated to required total doses at a particular dose rate.
The changes in the parameters such as the tensile strength, elongation
at break, and work done at rupture for the lignocellulose samples
on irradiation with the gamma-rays from a cobalt-60 source were measured.
The mechanical properties were found to have nonlinear relations
with the radiation doses. The chemical stability of irradiated fibers
was found to degrade progressively with the increase of radiation
dose. Additionally, other chemical changes of the samples due to
exposure to high-energy radiation were also investigated using fluorescence
and infrared spectroscopic analysis. Differential scanning calorimetry
and thermogravimetric studies showed a significant reduction in thermal
stability. The wide-angle X-ray diffraction study showed that structural
changes of cellulose appeared due to the radiation-induced chemical
reaction of lignocellulose.