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Investigating the Effect of Tungsten Nanoparticles on the Physical Properties of Polymer Composites

pourjahanbakhsh, Mohammad | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52047 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Musavi, Abbas; Shojaei, Akbar
  7. Abstract:
  8. The precise measurement of fluid flow in different fields of the industry is vitally important. In addition, due to enormous hydrocarbon reservoirs, Iran is the biggest owner of gas reservoirs in the world and exact measurement of fluids is of considerable importance to consumption or export. Ultrasonic flowmeters that are the most useful ones of them consist of three elements made of piezoelectric, impedance matching layer and backing material. In this study, on the contrary to former backing materials which usually use of titanium, tungsten, and aluminum oxide as a composite Filler, for the first time, tungsten oxide is used. In order to do this, composite samples were built of tungsten oxide nanoparticles, tungsten microparticles, and epoxy matrix and acoustic tests were taken to analyze them. The images of the scanning electron microscope (SEM) from the cross sections of the sample which 2.5% and 5% their weight were made of Nanocomposite show their good distribution and dispersion in the composite matrix. Acoustic characteristics (acoustic Impedance, Attenuation) of Nanoparticles are higher in comparison with microparticles. According to the results of acoustic samples which 5% of their weight is made of Nano tungsten oxide and sample that 10% of their weight is made of micro tungsten have the favorable characteristic to use them as a backing material
  9. Keywords:
  10. Ultrasonic Flowmeter ; Piezoelectricity ; Probe ; Acoustic Impedance ; Backing Material ; Tungsten

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