Nanostructured hydroxyapatite/polydimethylsiloxane composites obtained by reactive synthesis
| Autor: | Oscar Jacinto Bareiro Ferreira, Luis Alberto dos Santos, Kétner Bendo Demétrio |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polydimethylsiloxane Mechanical Engineering technology industry and agriculture Nanoparticle macromolecular substances 02 engineering and technology Adhesion 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering Surface energy 0104 chemical sciences Matrix (chemical analysis) chemistry.chemical_compound chemistry Mechanics of Materials Phase (matter) Ultimate tensile strength Ceramics and Composites Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Composites Part B: Engineering. 121:152-161 |
| ISSN: | 1359-8368 |
| Popis: | In this study, we developed a novel method based on reactive synthesis to prepare nanostructured hydroxyapatite/polydimethylsiloxane (n-HA/PDMS) composites. During reactive synthesis, the formation of calcium phosphates (CP's) occurs in situ during the mixing of PDMS with H3PO4 and Ca(OH)2, thus facilitating the production and incorporation of CP and increasing adhesion between the nanoparticles produced in the polymeric matrix. Thus, we assessed the influence of the reinforcing phase on the surface energy, tensile strength, and bioactivity of the composites. Incorporation of particles into PDMS led to higher surface energy values. The presence of CPs in PDMS increased its tensile strength, thereby maintaining the maximum deformation and toughening the PDMS. In vitro bioactivity tests provided evidence of a homogeneous layer of CP crystals on the composite surface, suggesting that the method developed was suitable for obtaining composites with good nanoparticle distributions and with particles coupled to the matrix without the use of coupling agents. Thus, these nanoparticles may have the potential for use as biomaterials after pH corrections. |
| Databáze: | OpenAIRE |
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