A reduction of diffusion in PVA Fricke hydrogels

8th International Conference on 3D Radiation Dosimetry

Smith, S.T.^1 ; Masters, K.S.^1 ; Hosokawa, K.^1 ; Blinco, J.^1 ; Crowe, S.B.^1 ; Kairn, T.^1,2 ; Trapp, J.V.^1

School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Australia^1

Genesis CancerCare Queensland, Brisbane, Australia^2

关键词: Chelating agent;    Diffusion rate;    Dose sensitivity;    Gelling agents;    Incremental improvements;    Partial bonds;    Postirradiation;    Xylenol Orange;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/573/1/012046/pdf
DOI  :  10.1088/1742-6596/573/1/012046

来源: IOP

【 摘 要 】

A modification to the PVA-FX hydrogel whereby the chelating agent, xylenol orange, was partially bonded to the gelling agent, poly-vinyl alcohol, resulted in an 8% reduction in the post irradiation Fe3+diffusion, adding approximately 1 hour to the useful timespan between irradiation and readout. This xylenol orange functionalised poly-vinyl alcohol hydrogel had an OD dose sensitivity of 0.014 Gy-1and a diffusion rate of 0.133 mm2h-1. As this partial bond yields only incremental improvement, it is proposed that more efficient methods of bonding xylenol orange to poly-vinyl alcohol be investigated to further reduce the diffusion in Fricke gels.