Effect of γ-irradiation on the physical and mechanical properties of chitosan powder

Fabrication and application of an immobilized TiO2/chitosan layer-by-layer system loaded with Reactive Red 4 dye for the removal of phenol and its intermediates

“…The intensity of this peak increases with the increase in TiO 2 loading which is attributed to the increase in the concentration of carbonyl groups. This observation is consistent with the browning effect (caused by the formation of carbonyl chromophore [21,[23][24][25]) on the irradiated CS, whereby the color becomes more intense at a higher loading of TiO 2 . Thus, it can be concluded that increasing the TiO 2 loading increases the oxidation of the CS sub-layer.…”

Effect of gamma radiation on dilute aqueous solutions and thin films of N-succinyl chitosan

“…In case of the irradiated chitosan, the observed Table 6 Elemental analysis data of chitosan and N-SC products, after their dilute aqueous solutions had been exposed to g-ray radiation. increase in the C/N and C/H values with an increase in the radiation dose suggested that g-ray radiation might induce the abstraction of some of the N-acetyl groups along the chitosan chains without the loss of the free amino groups, resulting in no noticeable change in the %DD of the polymer [12,29]. This postulation was in accord with a previous study on CM-chitosan by Huang et al [26], who reported that the increase in the C/N value of the irradiated sample with an increase in the radiation dose indicated that the radio-degradation occurred at N-position.…”

Modifications of structure and physicochemical properties of maize starch by γ-irradiation treatments

“…Most of the modification techniques, such as pregelatinization, chemical crosslinking, oxidation etc, are often complex and time consuming. However the technology of gamma irradiation as a cost-lowering and environmentally-friendly alternative method has been widely applied to produce modified polymer materials, such as b-glucan, xyloglucan, konjac glucomannan, and chitosan (Byun et al, 2008;Choi et al, 2009;Xu, Sun, Yang, Ding, & Pang, 2007;Zainol, Akil, & Mastor, 2009). Starch is one kind of natural carbohydrate based polymer.…”