Abstract : Alginate solution (3%, w/v) was prepared using deionized water from its powder. Then the solution was exposed to gamma radiation (0.1−25 kGy). The alginate films were prepared by solution casting. It was found that gamma radiation has strong effect on alginate solution. At low doses, mechanical strength of the alginate films improved but after 5 kGy dose, the strength started to decrease. The mechanism of alginate radiolysis in aqueous solution is discussed. Film formation was not possible from alginate solution at doses >5 kGy. The mechanical properties such as puncture strength (PS), puncture deformation (PD), viscoelasticity (Y) coefficient of the un-irradiated films were investigated. The values of PS, PD and Y coefficient of the films were 333 N/mm, 3.20 mm and 27%, respectively. Alginate beads were prepared from 3% alginate solution (w/v) by ionotropic gelation method in 5% CaCl2 solution. The rate of gel swelling improved in irradiated alginate-based beads at low doses (up to 0.5 kGy).
https://hal-riip.archives-ouvertes.fr/pasteur-01005555 Contributor : Nancy LaflammeConnect in order to contact the contributor Submitted on : Thursday, June 12, 2014 - 8:17:47 PM Last modification on : Monday, October 8, 2018 - 5:44:05 PM Long-term archiving on: : Tuesday, April 11, 2017 - 6:55:17 AM
File
Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed
until : jamais
Tanzina Huq, Avik Khan, Dominic Dusseault, Salmieri Stéphane, Ruhul A. Khan, et al.. Effect of gamma radiation on the physico-chemical properties of alginate-based films and beads. Radiation Physics and Chemistry, Elsevier, 2011, 81 (8), pp.945-48. ⟨10.1016/j.radphyschem.2011.11.055⟩. ⟨pasteur-01005555⟩