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Manufacturing and Applications of Carbon Nanotube Sheet and Thread

Chauhan, Devika
http://orcid.org/0000-0001-8426-6858
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535380002008127

Abstract Details

2018, MS, University of Cincinnati, Engineering and Applied Science: Aerospace Engineering.
Carbon nanotubes (CNTs) have extraordinary mechanical, thermal and electrical properties. However, the macroscopic products of CNTs such as sheet and thread, lack these extraordinary physical properties. This reduction in properties for the macroscopic products of CNT is due to the presence of structural defects (disorder-induced symmetry-breaking effects in the sp2 hybridized carbon products), impurities, slipping apart of the short nanotubes in bundles, and random orientation of the CNT strands in sheet and thread. Transferring the physical properties of individual CNTs to the macroscopic scale is a challenging task. To use carbon nanotubes in different applications, intensive research is being performed to improve the mechanical, thermal and electrical properties of CNT sheet and thread. The goal of this work is to investigate methods to improve the mechanical and electrical properties of CNT sheet and thread. The research starts with tuning the CNT synthesis process to produce CNT sheet with fewer structural defects. Also, the effect of this synthesis optimization process on the mechanical and electrical properties of the CNT sheet is investigated. Towards the goal of improving the properties of CNT sheet, further post-processing techniques are studied to improve the orientation of the CNT strands in CNT sheet. It is observed that the mechanical and electrical properties improved due to improved alignment and packing of the CNT strands in the sheet. From the perspective of the application, the hydrophilicity of the CNT sheet is also studied for integrating CNT sheet into textiles. Acid treatment of CNT sheet promoted the hydrophilicity of the CNT sheet. For acid treatment of CNT sheet, hydrogen peroxide and a mixture of H2SO4+HNO3 in 3:1 ratio is used. After analyzing the IG/ID ratio from Raman analysis before and after acid treatment, hydrogen peroxide treated CNT sheet for 48 h showed the best result. Hydrogen peroxide treatment of CNT sheet for 48 h showed lower contact angle in contact angle test with 25 percent acid etching of the CNT surface. Also, integration of CNTs in fiber reinforced composite laminates and the effect on the properties of the laminates were studied. Carbon nanotube sheets are interleaved in glass fiber reinforced composite (GFRC) laminates along with stitching the laminates with CNT thread. The stitched CNT thread improved the interlaminar shear strength of GFRC laminates by 23 percent. Whereas, the interlaminar integration of CNT sheet limited the fiber bridging of the GFRC, reducing its fracture toughness. Integration of nanoparticles and continuous carbon fiber into the nanotube synthesis process is also investigated and the hybrid material produced was characterized. Moreover, the development of Carbon Hybrid Materials (CHM) is discussed in this research work. The initial result shows the integration of metal nanoparticles in carbon nanotube materials and improvement in electrical conductivity of the carbon nanotube sheet due to the integration of silver coated copper particles into the CNT sheet. The thesis closes with recommendations towards further improving the properties of CNT material. The thesis overall looked at the full circle (synthesis, characterization, and application) of nanotube sheet and yarn development.
Peter Nagy, Ph.D. (Committee Chair)
Yao Fu (Committee Member)
Mark Schulz, Ph.D. (Committee Member)
126 p.
Nanotechnology
Carbon Nanotube; Rolling; Stretching; Carbon Hybrid Material; Fiber Reinforced Composite; Electrical Conductivity

Recommended Citations

Citations

  • Chauhan, D. (2018). Manufacturing and Applications of Carbon Nanotube Sheet and Thread [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535380002008127

    APA Style (7th edition)

  • Chauhan, Devika. Manufacturing and Applications of Carbon Nanotube Sheet and Thread. 2018. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535380002008127.

    MLA Style (8th edition)

  • Chauhan, Devika. "Manufacturing and Applications of Carbon Nanotube Sheet and Thread." Master's thesis, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535380002008127

    Chicago Manual of Style (17th edition)

ucin1535380002008127
164
© 2018, some rights reserved.Creative Commons License Manufacturing and Applications of Carbon Nanotube Sheet and Thread by Devika Chauhan is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.