1 / 16

John Conley Advisor: Dr. Ajay Malshe 7/20/09

Integration and Transient Shear-Thickening Effects of Carbon Nanotubes and Carbide Nanoparticles in a Polymer Matrix. John Conley Advisor: Dr. Ajay Malshe 7/20/09. Background Information. Carbon Nanotubes Discovery by Iijima in 1991 Unique properties due to size and structure

elmo-doyle
Download Presentation

John Conley Advisor: Dr. Ajay Malshe 7/20/09

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Integration and Transient Shear-Thickening Effects of Carbon Nanotubes and Carbide Nanoparticles in a Polymer Matrix John Conley Advisor: Dr. Ajay Malshe 7/20/09

  2. Background Information • Carbon Nanotubes • Discovery by Iijima in 1991 • Unique properties due to size and structure • Conductive, strong, lightweight, etc. • SW, DW, and MW varieties • SW better for nanocomposites • Polymer • Ultra High Molecular Weight Polyethylene

  3. Goals • Improve nanotube/particle integration and loading to improve mechanical properties (strength, hardness, etc.) • Characterize shear-thickening effect of nanotubes/particles in polymer matrix • Combine loaded polymer with other materials to create prototype complex material

  4. First Phase: Synthesis Source: Dr. Ajay Malshe

  5. + + CNTs = . . .

  6. Results

  7. Second Phase: Testing/Characterization • Testing • Transmission Electron Microscopy, for surface morphology. • Nanoindentation, for hardness. • Nanoindentation, for storage modulus. • Tensile testing, for tensile strength. • Tensile testing, for Young’s modulus. • Izod or Charpy testing, for impact hardness • Characterization • Analyze mechanical properties during dynamic and static loading to determine characteristics of shear-thickening effects

  8. Results • Nanoindentation

  9. Future Work

  10. New Process Idea • Skip complicated wet phases and associated processes • Filtration, drying, etc. • Utilize powdered materials and vibrator plate to skip straight to hot press • Many benefits • Easier, cheaper, safer, faster, simpler, unique

  11. Proposed Method: Dual Powder Sintering

  12. Plans • Continue phases I and II • Manufacture multiple samples of nanocomposite • CNT/UHMWPE composite with new, purer UHMWPE phase from TiconaUSA • Begin testing of dual powder sintering synthesis method for carbide nanocomposite • Complete parameter matrix • Analyze with more advanced testing equipment like TEM or SEM • Validate results with macroscale testing

  13. Third Phase: Molecular Dynamics • Empirical models for fiber in composite matrix • Equivalent-continuum modeling method • Traditional fiber composite models do not apply • Must take into account large interfacial area relative to polymer matrix volume • Must take into account secondary forces such as VdW forces • Nanocomposite models • Polymer matrix/CNT • Polymer matrix/CNT interfacial modeling • Van der Waals modeling • σ-ε behavior • Analyzed by comparing to rule of mixtures

  14. Acknowledgements • Steven Wehmeyer • Supply of purified CNTs • Ranjit John • Supply of CNTs, technical advising • DmytroDemydov • Primary advising • Jason Bailey, Mohammed Chowdhury, ParashKalita, AnoopSamant, Corey Thompson, Wenyang Zhang • Technical advising and assistance • Joshua Wilson • Administrative assistance • NanoMech • Equipment loan

  15. References • R. Andrews, A. Berkovich, J.C. Hower, D. Jacques, & T. Rantell. “Fabrication of Carbon Multi-wall Nanotube/Polyer Composites by Shear Mixing.” University of Kentucky, Center for Applied Energy Research. • W.C. Oliver and G.M. Pharr. Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology. J. Mater. Res. 19 (2004), 3. • Wetzel, Eric D. et al. "Protective Fabrics Utilizing Shear Thickening Fluids." 2004. • Yuezhen Bin, MayunaKitanaka, Dan Zhu, and Masaru Matsuo. Department of Textile and Apparel Science, Faculty of Human Life and Environment, Nara Women’s University, Nara 630-8263, Japan.

  16. Your comments, questions, and advice are appreciated.

More Related