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Advances in Materials Research Volume 4, Number 3, September 2015, pages 145-164 DOI: http://dx.doi.org/10.12989/amr.2015.4.3.145 |
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Biophysical properties of PPF/HA nanocomposites reinforced with natural bone powder |
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Nagwa A. Kamel, Samia H. Mansour, Salwa L. Abd-El-Messieh,
Wafaa A. Khalil and Kamal N. Abd-El Nour
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| Abstract | ||
| Biodegredable and injectable nanocomposites based on polypropylene fumarate (PPF) as unsaturated polyester were prepared .The investigated polyester was crosslinked with three different monomers namely N-vinyl pyrrolidone (NVP), methyl methacrylate (MMA) and a mixture of NVP and MMA (1:1 weight ratio) and was filled with 45 wt% of hydroxyapatite (HA) incorporated with different concentrations of chemically treated natural bone powder (NBP) (5, 10 and 15 wt%) in order to be used in treatment of orthopedics bone diseases and fractures. The nanocomposites immersed in the simulated body fluid (SBF) for 30 days, after the period of immersion in-vitro bioactivity of the nanocomposites was studied through Fourier transform infrared (FTIR), scanning electron microscope (SEM), energy dispersive X-ray (EDX) in addition to dielectric measurements. The degradation time of immersed samples and the change in the pH of the SBF were studied during the period of immersion. | ||
| Key Words | ||
| biodegradable polyester; nanocomposites; bone powder; dielectric spectroscopy; biophysical properties | ||
| Address | ||
| Nagwa A. Kamel, Salwa L. Abd-El-Messieh and Kamal N. Abd-El Nour: Microwave Physics and Dielectrics Department, National Research Centre, Dokki, Cairo, Egypt Samia H. Mansour: Polymers and Pigments Department, National Research Centre, Dokki, Cairo, Egypt Wafaa A. Khalil: Biophysics Department, Faculty of Science, Cairo University, Egypt | ||