Controlled manipulation of CNTs in glass/epoxy composites with cut-outs using non-uniform electric field
- Title
- Controlled manipulation of CNTs in glass/epoxy composites with cut-outs using non-uniform electric field
- Author
- 포티니스, 자야람 가마나사; 자야람 가마나사 포티니스
- Keywords
- non-uniform electric field; dielectrophoresis; CNT alignment; multiscale composites; electrical resistance mapping
- Issue Date
- 2020-04
- Publisher
- TAYLOR & FRANCIS LTD
- Citation
- ADVANCED COMPOSITE MATERIALS, v. 30, no. 3, page. 205-221
- Abstract
- In this work, an effective methodology to incorporate aligned carbon nanotubes (CNTs) in long fiber composites in the presence of geometric discontinuities has been studied. Unidirectional (UD) glass/CNT-epoxy composites containing circular cut-outs were used as representative of a common discontinuity. Multi-walled (MW) CNTs were introduced in the composites via the epoxy matrix and aligned using low-frequency non-uniform AC electric field. This work discusses the methodology to control CNT alignment around the cut-out with the objective of enhancing the stiffness locally. The effectiveness of CNT alignment was assessed indirectly through the mapping of electrical resistance and polarized Raman spectroscopy. A strong correlation was found between the targeted CNT alignment state and the measured resistance values around the cut-out. As a precursor to developing glass/CNT-epoxy hierarchical composites, the response of MW-CNTs in the epoxy resin system was assessed at various input voltage levels in correlation with the weight fraction (wt.%) of CNTs. While a change in electrical resistance by similar to 3 orders of magnitude was found along the direction of CNT alignment in the hierarchical composites, a change in electrical resistance by similar to 5 orders of magnitude was observed in the CNT-epoxy composites in comparison with that of the respective control samples.
- URI
- https://www.tandfonline.com/doi/full/10.1080/09243046.2020.1744220https://repository.hanyang.ac.kr/handle/20.500.11754/169677
- ISSN
- 0924-3046; 1568-5519
- DOI
- 10.1080/09243046.2020.1744220
- Appears in Collections:
- OFFICE OF ACADEMIC AFFAIRS[S](교무처) > Center for Creative Convergence Education(창의융합교육원) > Articles
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