Abstracts Book - IMRC 2018

• SB2-P034
DISPERSION OF GRAPHENE OXIDE ON MEDICAL-GRADE
POLYURETHANE FOR POTENTIAL USE IN BIOSENSORS
Joemi Conchita Durazo Alarcón 1 , José de Jesús Ku Herrera 2 , Lerma Hanaiy Chan Chan 3
1 Universidad de Sonora, Ingeniería Química y Metalurgia, Mexico. 2 CONACyT-Centro de
Investigación en Química Aplicada, Polymer sinthesis, Mexico. 3 CONACyT- Universidad de
Sonora, Departamento de Física, Mexico.
The composite materials are created for improving a material and optimizing its
performance at determined application. For that reason, this job have the
purpose to combination of two excellent materials, the medical-grade
polyurethane Tecoflex® SG-85A and Graphene oxide (GO).
Polyurethanes have a wide range of applications due to its diversity. They have
properties of biocompatibility, elasticity, durability, hardness, although it lacks
rigidity. While, graphene, an sp 2 hybridized carbonious material, has drawn
tremendous attention in the field of hybrid materials due to its exceptional
thermal, mechanical, optical and electrical properties. Graphene or its
derivatives are frequently used in composite materials, sensors, catalysis,
electronics, and as carriers for drugs or genes in biomedical fields. Due to its
high aspect ratio, graphene provides a large interfacial area which is available to
the polymer for interactions, and which helps to improve the properties of the
pristine polymer [1].
Composite material of polyurethane and graphene reinforcement, is expected
to configure a very versatile material. Which is interesting for many industries
such as medicine, making biosensors [2].
Films of Tecoflex/GO, were prepared by casting using tetrahydrofurane because
it is a good solvent for the polyurethane and good dispersant for GO mean
ultrasonic bath, according literature [3]. Composites were done by mixing
Tecoflex solution and GO dispersion in different proportions, corresponding to
0%, 0.1%, 0.5%, 1.5% and 2.5% w/w of GO.
According microscopy characterization composites at 0.1% and 0.5% were well
dispersed, but higher proportion of GO produced aggregates. It is expected
dispersion and composition affect mechanical properties of composites and
conductivity. Further characterization will be conducted.