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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 54719 (06)
- University: Sharif University of Technology
- Department: Chemical and Petroleum Engineering
- Advisor(s): Frounchi, Masoud
- Abstract:
- Polyvinyl alcohol and polyvinyl pyrrolidone polymers are among the biocompatible and widely used polymers that are very important in medical science and their composites are used in tissue engineering, bone engineering, etc. Various nanoparticles have been used to improve the properties of these composites. With this knowledge, in this study, to prepare a biocompatible nanocomposite for medical engineering and improve the piezoelectric, mechanical, and electrical properties of these two polymers, different percentages of these polymers were prepared with barium titanate nanoparticles and scanning electron microscopy using infrared spectroscopy tests. Mechanical properties tests, piezoelectric properties tests, and electrical conductivity tests have been investigated. To improve the properties of nanocomposites widely used in sensors, lead zirconate nanoparticles have been used to prepare composites. To improve the properties of barium titanate-containing samples, biocompatible, biodegradable, and non-toxic scaffolds have been prepared and after preparing the scaffolds by electrospinning method, they have been examined by tests. The results show that the addition of nanoparticles improves the electrical conductivity, crystalline phase, piezoelectric properties, ultimate strength, and Young modulus; But the final strain of the samples has dropped. The best properties for the sample were 5% by weight of the titanate charge to which the head voltage reached, indicating that the piezoelectric property increased from 0.361 for the sample without nanoparticles to 1.23. It was also found to have piezoelectric properties better than your composites, and the head-to-head voltage for the 5%-weight scaffold for barium-titanium was 1.486. Also for PZT nanoparticles, the maximum head-to-head voltage for the sample was 10% by weight, which increased from 0.361 to 1.42, indicating an improvement in piezoelectric properties with increasing nanoparticles
- Keywords:
- Pieozoelectric ; Electrospinning ; Poly Vinyl Alcohol ; Barium Titanat ; Nanocomposite ; Polyvinylpyrolidon ; Lead Zirconate Titanate (PZT)
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