Estudo da resistência mecânica de um compósito de matriz polimérica com adição de alumina
Currently, research for the development of biocompatible materials has been widely developed. These materials, also known as biomaterials, are used in the medical field in order to treat, replace or repair biological systems (tissues and/or organs) partially or totally. In the area of orthopedic...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Brasil
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/25935 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | Currently, research for the development of biocompatible materials has been
widely developed. These materials, also known as biomaterials, are used in the
medical field in order to treat, replace or repair biological systems (tissues
and/or organs) partially or totally. In the area of orthopedic surgery, bone
cements, besides the use for fixation of implants, are applied in the repair of
bone failures resulting from fractures caused by high energy trauma, as in the
case of accidents involving automotive vehicles and/or human aging, in the face
of osteoporosis, which is a disease characterized by the reduction of the
mineral part of bones, making them more fragile, and consequently, more
susceptible to fractures. Bone cement based on polymethylmethacrylate
(PMMA) is already widely applied in the field of orthopedic surgery. In this work
the effect of the addition of alumina (Al2O3) on the polymeric matrix (PMMA) on
the mechanical properties, mainly flexural strength was studied. The composite
formed by PMMA and Al2O3, besides its possible applicability in the orthopedic
area, will allow a reduction of cost, since the alumina is abundant in nature. For
the development of this work the powders of PMMA and alumina were
characterized, and to obtain the composites the polymer mixtures (powder)
were carried out in the presence of the liquid reducer (monomer) with addition
of alumina, in the proportions of 0.5 %, 1% and 2% by weight. From this, the
hardened samples were obtained in the form of bars. The starting powders and
the mixed powders were characterized by scanning electron microscopy (SEM),
dispersive energy spectroscopy (EDS), X-ray diffraction (XRD), and already the
hardened samples were submitted to the tests of mechanical resistance to
flexure, and characterized in SEM, EDS. The results showed that the addition of
alumina to the PMMA influenced the flexural strength. |
|---|