journal article·2022-04-26

Revealing Density Thresholds of Carbon Nanotube Cross-Links for Load Transfer: A Graph Theory Strategy

Jiachao Ji, Jiaojiao Wang, Chunhua Zhu, Xiaohua Zhang, Qingwen Li, Junhua Zhao, Wanlin Guo

ACS Nano· Volume 16· Issue 4
Publisher page

Abstract

We report that the load transfer in carbon nanotube (CNT) networks is determined by the cross-link density via three critical thresholds, namely, percolation, connection, and saturation, which divide the transfer into four different modes. Reminiscent of the connectivity problem in the graph theory, an individual path for the successive load transfer through the network is formed at the first threshold, then all CNTs are connected together by cross-links at the second one, and finally, the connections are gradually converted into tetrahedrons toward a rigidized connectivity until the third saturation threshold. The power–law distribution of the number of cross-links per CNT shows a preferential linking mechanism, i.e., that the CNTs with high cross-links are more attractive to form new cross-links than the CNTs with low cross-links, while repetitive cross-links could hardly improve the strength of CNT networks.
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Research context

OpenAlex topics: Carbon Nanotubes in Composites · Graphene research and applications · Nanopore and Nanochannel Transport Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, 214122 Wuxi, P.R. China

Division of Nanomaterials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, 215123 Suzhou, P.R. China

Innovation Center for Textile Science and Technology, Donghua University, 201620 Shanghai, P.R. China

State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 210016 Nanjing, P.R. China

Funding

Natural Science Foundation of Jiangsu Province · Central University Basic Research Fund of China · State Key Laboratory of Mechanical System and Vibration · National Natural Science Foundation of China · Higher Education Discipline Innovation Project

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