Mechanisms of Strain-Induced Interfacial Strengthening of Wet-Spun Filaments

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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ACS Applied Materials and Interfaces, Volume 14, issue 14
We investigate the mechanism of binding of dopamine-conjugated carboxymethyl cellulose (DA-CMC) with carbon nanotubes (CNTs) and the strain-induced interfacial strengthening that takes place upon wet drawing and stretching filaments produced by wet-spinning. The filaments are known for their tensile strength (as high as 972 MPa and Young modulus of 84 GPa) and electrical conductivity (241 S cm-1). The role of axial orientation in the development of interfacial interactions and structural changes, enabling shear load bearing, is studied by molecular dynamics simulation, which further reveals the elasto-plasticity of the system. We propose that the reversible torsion of vicinal molecules and DA-CMC wrapping around CNTs are the main contributions to the interfacial strengthening of the filaments. Such effects play important roles in impacting the properties of filaments, including those related to electrothermal heating and sensing. Our findings contribute to a better understanding of high aspect nanoparticle assembly and alignment to achieve high-performance filaments.
| openaire: EC/H2020/788489/EU//BioELCell Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 31730106, 31770623, 31670555), the Canada Excellence Research Chair initiative (CERC-2018-00006), and Canada Foundation for Innovation (Project number 38623), as well as the European Research Council (ERC), under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 788489). T.G. would like to acknowledge the financial support from China Scholarship Council (CSC). The authors thank Dr. Zhifeng Wang of the Test Center at Yangzhou University for technical assistance. Publisher Copyright: © 2021 American Chemical Society. All rights reserved.
axial orientation, carbon nanotube, interfacial strengthening, reversible torsion, wet drawing
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Guo, T, Wan, Z, Yu, Y, Chen, H, Wang, Z, Li, D, Song, J, Rojas, O J & Jin, Y 2022, ' Mechanisms of Strain-Induced Interfacial Strengthening of Wet-Spun Filaments ', ACS Applied Materials and Interfaces, vol. 14, no. 14, pp. 16809–16819 .