| dc.description.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. | en_US |
