Natural Rubber Membrane with Silver Nanoparticles
to the Development of Leishmania braziliensis Antigen
C. S. DANNA1, F.C. CABRERA1, C. G. BARBOZA-FILHO1, A. JOB1
1
DFQB-Faculdade de Ciências e Tecnologia-UNESP, Presidente Prudente, Brasil
This work shows the different stages for obtaining and caracterizing the natural rubber
(NR) membranes employing a coloidal incoporation of silver (Ag) nanoparticles
generateing NR/Ag. The NR membranes are obtained from the Hevea brasiliensis
rubber tree latex by means of a casting technique. The silver nanoparticle were
incorporated on the NR membrane by a in situ reaction method through the salt
reduction of the silver nitrate (AgNO3) considering different reduction times. The
NR/Ag composite caracterization was realized through Ultraviolet Visible Spectroscopy
(UV-Vis), thermal analysis (DSC, TG) and combined TG/FT-IR. The results obtained
from the UV-Vis techinques shows an absorption band close to 420 nm due to the silver
nanoparticle surface plasmon and to the intensity absorption growing following the
reduction time suggesting a higher silver nanoparticle concentration in the NR
membrane. From the DSC curves one can check that there are no changes on the
composite thermal behavior once for disting reduction times the glass transition
temperature and thermal degradation keeps unchanged. From the TG/FT-IR one
observes a good BN/Ag membrane thermal stability when compared to a purê NR
membrane. The menbranes are going to be applied on a separation process of infecting
L. braziliensis and antigen factory on an important stage of the development of an
efficient vaccine against the brazilian leishmania species.
keywords: natural rubber, silver nanoparticles, Leishmania braziliensis antigen.
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e-mail: [email protected], endereço: Rua Roberto Simonsen, 305 CEP:19060900 Presidente Prudente - SP