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Project #6 Surface Modification of Carbon Nanotubes for Property Improvement

Project #6 Surface Modification of Carbon Nanotubes for Property Improvement. Sponsored ByThe National Science Foundation Grant ID No.: DUE-0756921. Cuong Diep – pre-junior, Chemical Engineering Milena Fernandez – pre-junior, Computer Engineering

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Project #6 Surface Modification of Carbon Nanotubes for Property Improvement

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  1. Project #6Surface Modification of Carbon Nanotubes for Property Improvement • Sponsored ByThe National Science Foundation Grant ID No.: DUE-0756921 Cuong Diep – pre-junior, Chemical Engineering Milena Fernandez – pre-junior, Computer Engineering College of Engineering and Applied Science; University of Cincinnati; Cincinnati, Ohio Dr. Vesselin Shanov- Chemical and Materials Engineering, CEAS Dr. Noe Alvarez- Chemical and Materials Engineering, CEAS

  2. Outline • Goals and Objectives • Carbon Nanotubes (CNTs) • The processes of improving CNTs thread • Densification • Doping • Coating • Integration of the transformer • CNT future applications • Summary • Conclusion

  3. Goals • To design a transformer using CNTs thread Objectives To design transformer To modify CNTs thread by the processes of densification, doping and coating. To wind CNTs thread on transformer. To induce voltage to transformer and power up a light source. CNTs- Carbon nanotubes Transformer- electrical device

  4. Carbon Nanotubes • Carbon nanotubes (CNTs) are an interesting type of material due to its superior strength, and electrical conductivity. Shi, Z., Wang, Z., Gu, Z., Pristine and Filled Double-Walled Carbon Nanotubes (image) Guardian.co.uk

  5. Carbon Nanotubes Founded in 1991 by Sumio Lijima Hollow cylinders made out of carbon atoms 10,000 times smaller than a human hair http://www.gaia3d.co.uk/3d-models/3d-chemistry/carbon-nanotube/

  6. Comparison 10,000 times larger My Hair CNTs Thread

  7. Chemical Vapor Deposition (CVD) • An irreversible deposition of a solid from a mixture of gases through a heterogeneous chemical reaction

  8. CNTs Thread • CNTs thread gets spun up from a silicon wafer • This process is like spinning cotton

  9. Densification • The soaking of CNTs thread in solution containing water and acetone. • This procedure helps improve the CNT thread by increasing the diameter of the thread and slightly increasing its strength.

  10. Chemical Doping • A process of bonding electrons to the surface of the thread by disassociating an acidic solution. • Nitric Acid • Sulfuric Acid

  11. SEM Pictures The doped thread is 6.5x small in diameter than the undoped Un-doped Thread Doped Thread UC Nanoworld

  12. Resistivity- Measurement of how a material opposes the flow of electrons. • Lowers through doping • Resistivity is inversely proportional to the diameter of the thread

  13. Doping Results

  14. Coating • A process of covering the thread with a thin layer of insulated polymer • Nylon • PVA • Nitrile

  15. Transformer • What is it? • How are we using it? • Why are we using it? Source: eHow

  16. Transformer • Works on Faraday’s Law of induction • Changes voltage and current levels • Remains the same power • Induced voltage vs. N(number of turns) N-North S-South Source: WorldPress

  17. What is it used for? • Assists as voltage/current regulator Within the project… • Will prove properties of CNTs

  18. Final Product Power supply connected to primary coil Light source connected to secondary coil CNTs threads will replace insulated coils Source: Energy Efficiency Transformer

  19. Transformer with the LED Bulb

  20. Transformer with CNTs

  21. Transformer with the LED

  22. Data

  23. CNT applications • CNTs Cable Wire • Light weight • High temperature resistance • Durable Windsun.com

  24. Conclusion • Chemical Vapor Deposition is one way to make CNTs • Lighter, and durable cables will incorporate CNTs

  25. Recommendations for Additional Research • Add more windings • Find the right inverter • Try different type of doping solution • Improve coating - PVA

  26. Acknowledgements Dr. Vesselin Shanov Dr. Noe Alvarez Nicholas Kienzle Brad Ruff Doug Hurd UC Nanoworld NSF - Grant ID No.: DUE-0756921

  27. Questions ?

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