EM wave absorber had been used to solve the RFID interference problem when it is
used in near metallic environment. Synthetic polymeric matrix from various cellulosic
pulps were used to produce wave absorbers with magnetite as its main reinforcement
using two different approaches namely lumen loading method and in-situ
coprecipitation method. Since both methods were a successful in terms of green
technology and cost reduction, this study focused on enhancing the previous two
methods by introducing a new developed method called as coprecipitation loading
method. Besides that, the exploration of the compatibility of paddy straw and recycled
paper as the magnetic sheet matrix also was done to add the green technology value.
Result obtained reveal that paddy straw and recycled paper are very good candidate to
be embedded with nano-magnetite particles thus conforming its compatibility to be used
as a substrate to produce the wave absorber. All three loading methods have good
degree of loading around 18.4% to 34.4%, and VSM data also shows that the magnetic
wave absorbers exhibit good superparamagnetic behaviour. The proposed method
consume less power to be produced compared to the previous methods thus contributes
to green environmental effects. All samples were tested in the HF RFID application near
to metallic environment showing great performance in alleviating the interference
problem and recover up to 60% of the distance detection by comparing to the
commercial wave absorber. By using the loading methods and substrates proposed, this
research contributes to the production of Green Magnetite Nanocomposites Sheets using
substrate from paddy straw and recycled paper pulp combined with magnetite
nanoparticles. Besides that, the introduction of coprecipitation loading method also
enables magnetic sheet to be produced using less energy compared to previous methods.
Lastly, samples produced indicate that the green magnetic wave absorber do perform its
main purpose in the RFID application near metallic environment