Title: Pyrolyzed Polydopamine (py-pda) Functionalized Carbon Nanotubes and their Carbon/Carbon Composite with Improved Mechanical and Electrical Properties

Authors: Songlin Zhang, Ayou Hao, Nam Nguyen, Abiodun Oluwalowo, Juhil Mahendra Ahir Ahir, Zhe Liu, Yourri Dessureault, Jin Gyu Park, and Richard Liang

DOI: 10.33599/nasampe/s.19.1510

Abstract: Carbon nanotube/carbon (CNT/C) composites show potential for lightweight structural materials and non-metal electrical conductors for aerospace, military, and other industries where the combination of lightweight, high strength and excellent conductivity are required. Numerous research attempts have been reported to fabricate CNT/C composite focusing on high CNT alignment and dense carbon matrix. However, simultaneous improvements for mechanically strengthening and electrically improving properties of strength and conductivity in materials still presents a great challenge. In this study, pyrolyzed polydopamine (py-PDA) with selected surface treatments is introduced as an interface enhancer between CNTs and carbon matrix. Due to the presence of py-PDA, the effective physical interlocking and conductive pathways are rebuilt at the interface area between CNTs and carbon matrix, resulting in better load transfer and electron transport. The CNT/py-PDA/C composite fibers demonstrated remarkable improvements in electrical conductivity (2.1 × 103 S cm-1) and tensile strength (up to 727 MPa), which should prove to be vastly advantageous as compared to the previously reported CNT/C composites. The outstanding thermal stability of fully carbonized materials is also an attractive feature. Coupled with scalable manufacturing methods, these integrated characteristics of CNT/py-PDA/C composite fiber can potentially have broad applications for lightweight structural materials and non-metal conductors.

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Conference: SAMPE 2019 - Charlotte, NC

Publication Date: 2019/05/20

SKU: TP19--1510

Pages: 15

Price: FREE