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Morphology, rheological, and electrical properties of flexible epoxy/carbon composites cured by UV technique

  • Organic and Hybrid Functional Materials
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Abstract

The aim of this research was to develop the UV-cured epoxy/carbon composites. The rheological properties of the uncured neat epoxy and epoxy composite with graphite, graphene, and multi-walled carbon nanotube (MWCNT) were evaluated to observe the macroscopic flow behavior and the microstructure by shear force. The results showed that epoxy/carbon composites at high filler content exhibited shear-thinning behavior with a high yield stress value and epoxy/MWCNT at 30 phr showed this characteristic obviously. The fractured surface and particle dispersion in the epoxy matrix were evaluated by scanning electron microscopy and transmission electron microscopy, respectively. Epoxy/carbon composites at high filler content displayed rough fracture surface with particle agglomeration, thus the electrical conductivity increased. The result showed that the epoxy/MWCNT composites had high potential to use as a conductive adhesive with a 3D printing process due to high electrical conductivity with high viscosity that could be formed easily during processing.

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Acknowledgments

We would like to acknowledge Aditya Birla Chemicals Ltd., Rayong, Thailand, for chemical support. We would like to thank Prof. Dr. Piyasan Praserthdam and Associate Prof. Dr. Anongnat Somwangthanaroj for analytical instrument support. P. Charoeythornkhajhornchai would like to acknowledge Faculty of Engineering (VJP 12/2560), Burapha University, for financial support.

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  1. Division of Materials Engineering, Faculty of Engineering, Burapha University, Muang, Chonburi, 20131, Thailand

    Pollawat Charoeythornkhajhornchai

  2. Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand

    Chavakorn Samthong

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  1. Pollawat Charoeythornkhajhornchai
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Correspondence to Pollawat Charoeythornkhajhornchai.

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Charoeythornkhajhornchai, P., Samthong, C. Morphology, rheological, and electrical properties of flexible epoxy/carbon composites cured by UV technique. Journal of Materials Research 35, 1874–1887 (2020). https://doi.org/10.1557/jmr.2020.156

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  • DOI: https://doi.org/10.1557/jmr.2020.156

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