Karakterisasi dan Analisis Bolus Radioterapi dari Silicone Rubber, Resin Epoksi dan Ampas Tebu Menggunakan Energi Berkas Elektron

Abstract

A radiotherapy bolus composite material has been prepared from a mixture of silicone rubber, epoxy resin as an adhesive, catalyst as a material to accelerate bolus hardening and bagasse as filler with variations in the composition of silicone rubber RTV 52 : epoxy resin : catalyst bluesil 60R : bagasse ( 80:16:3:1)%wt, (80:15:3:2)%wt, (80:14:3:3)%wt, (80:13:3:4)%wt. The bolus samples were prepared using two stages: First, silicone rubber, epoxy resin, and sugarcane bagasse were mixed with a catalyst until homogeneous using a mixer for 6 minutes. In the second stage, the homogeneous mixed material was printed with an acrylic mold measuring 11 x 11 x 0.5 cm3 and then dried in the room. Each bolus sample that has been characterized includes a variety of properties. Physical properties include density, porosity, and water absorption. Mechanical properties include tensile strength, elongation at break, and elastic modulus. In addition, performance properties such as RED (Relative Electron Density) and absorbed dose are also characterized. Furthermore, SEM (Scanning Electron Microscopy) and FTIR (Fourier Transform Infrared Spectroscopy) analyzes were also performed on the bolus sample. Characterization of the bolus composite material resulted in a density of 1.26 gr/cm3, porosity of 2.45%, water absorption capacity of 2.23%, tensile strength of 0.94 MPa, elongation at break of 150.75% and modulus of elasticity of 0.95 MPa. From the results of the SEM paldal bolus C (80:14:3:3)%wt showed that the surface of the bolus was quite metallized and the FTIR halsil showed that the radiotherapy bolus functional groups were similar to the constituent materials. The optimum surface absorbed dose percentage at 6 MeV was 108.12%, for 8 MeV was 108.26%, and 10 MeV was 106.80% and in terms of the RED value, all radiotherapy boluses were equivalent to body tissues.