γ-Radiation Induced Changes in the Physical and Chemical Properties of Lignocellulose

Abstract

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.

Thermal behavior of biodegraded lime wood

“…31 The peak temperature for the thermal decomposition process of the undecayed lime wood (274°C) is 2-8°C higher than the maximum temperatures for the decayed wood samples (up to 265°C) ( Fig. 8 and Table 4; see values for T 2 ), which is in agreement with the temperature reported by thermogravimetry.…”

Influence of gamma irradiation exposure on the performance of supercapacitor electrodes made from oil palm empty fruit bunches

“…1 for nonirradiated GMs are typical for lignocellulosic materials and are similar to those in the FTIR spectra reported for EFB [59,60], dried date pits [61] and jute fibers [62]. Assignments of these bands to their corresponding functional groups were reported in Refs.…”

Gamma Irradiation Induced Degradation of Orange Peels

“…Gamma irradiation affects these bonds and causes the van der Walls power to weaken, which results in the degradation of cellulose and increasing degradability of the cell wall constituents [28]. Additionally, with the breaking of hydrogen bonds, free radicals are produced and then the concentration of free radicals and also, the number of separated chains from cellulose ( Figure 6), increases with the increasing irradiation dose [19,21]. The irradiation causes the formation of carbonyl groups of cellulose at the presence of oxygen that helps cellulose breakdown.…”

“…Few reports exist on the use of gamma irradiation on lignocellulosic biomass [17][18][19][20]. Gamma irradiation, if is used on lignocellulosics in high dosage, causes a decrease in cell wall constituents or depolymerizes and delignifies the fiber [21].…”