Understanding the Mechanism of the Structure-Dependent Mechanical Performance of Carbon-Nanotube-Based Hierarchical Networks from a Deformation Mode Perspective
Carbon nanotube (CNT)-based networks have wide applications, in which structural design and control are important to achieve the desired performance. This paper focuses on the mechanism behind the structure-dependent mechanical performance of a CNT-based hierarchical network, named a super carbon na...
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| Natura: | Articolo |
| Lingua: | English |
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MDPI AG
2023-12-01
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| Serie: | Nanomaterials |
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| Accesso online: | https://www.mdpi.com/2079-4991/13/24/3119 |
| _version_ | 1827573950769528832 |
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| author | Xian Shi Xiaoqiao He Xuefeng Liu |
| author_facet | Xian Shi Xiaoqiao He Xuefeng Liu |
| author_sort | Xian Shi |
| collection | DOAJ |
| description | Carbon nanotube (CNT)-based networks have wide applications, in which structural design and control are important to achieve the desired performance. This paper focuses on the mechanism behind the structure-dependent mechanical performance of a CNT-based hierarchical network, named a super carbon nanotube (SCNT), which can provide valuable guidance for the structural design of CNT-based networks. Through molecular dynamic (MD) simulations, the mechanical properties of the SCNTs were found to be affected by the arrangement, length and chirality of the CNTs. Different CNT arrangements cause variations of up to 15% in the ultimate tensile strains of the SCNTs. The CNT length determines the tangent elastic modulus of the SCNTs at the early stage. Changing the CNT chirality could transform the fracture modes of the SCNT from brittle to ductile. The underlying mechanisms were found to be associated with the deformation mode of the SCNTs. All the SCNTs undergo a top-down hierarchical deformation process from the network-level angle variations to the CNT-level elongations, but some vital details vary, such as the geometrical parameters. The CNT arrangement induces different deformation contributors of the SCNTs. The CNT length affects the beginning point of the CNT elongation deformation. The CNT chirality plays a crucial role in the stability of the junction’s atomic topology, where the crack propagation commences. |
| first_indexed | 2024-03-08T20:29:25Z |
| format | Article |
| id | doaj.art-d9e4503eed7d4668bd5d85034df1ea0d |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-08T20:29:25Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-d9e4503eed7d4668bd5d85034df1ea0d2023-12-22T14:29:08ZengMDPI AGNanomaterials2079-49912023-12-011324311910.3390/nano13243119Understanding the Mechanism of the Structure-Dependent Mechanical Performance of Carbon-Nanotube-Based Hierarchical Networks from a Deformation Mode PerspectiveXian Shi0Xiaoqiao He1Xuefeng Liu2School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215009, ChinaDepartment of Architecture and Civil Engineering, City University of Hong Kong, Tat Chee Avenue, Hong KongCollege of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, ChinaCarbon nanotube (CNT)-based networks have wide applications, in which structural design and control are important to achieve the desired performance. This paper focuses on the mechanism behind the structure-dependent mechanical performance of a CNT-based hierarchical network, named a super carbon nanotube (SCNT), which can provide valuable guidance for the structural design of CNT-based networks. Through molecular dynamic (MD) simulations, the mechanical properties of the SCNTs were found to be affected by the arrangement, length and chirality of the CNTs. Different CNT arrangements cause variations of up to 15% in the ultimate tensile strains of the SCNTs. The CNT length determines the tangent elastic modulus of the SCNTs at the early stage. Changing the CNT chirality could transform the fracture modes of the SCNT from brittle to ductile. The underlying mechanisms were found to be associated with the deformation mode of the SCNTs. All the SCNTs undergo a top-down hierarchical deformation process from the network-level angle variations to the CNT-level elongations, but some vital details vary, such as the geometrical parameters. The CNT arrangement induces different deformation contributors of the SCNTs. The CNT length affects the beginning point of the CNT elongation deformation. The CNT chirality plays a crucial role in the stability of the junction’s atomic topology, where the crack propagation commences.https://www.mdpi.com/2079-4991/13/24/3119CNT networkmolecular dynamics simulationmechanical performance |
| spellingShingle | Xian Shi Xiaoqiao He Xuefeng Liu Understanding the Mechanism of the Structure-Dependent Mechanical Performance of Carbon-Nanotube-Based Hierarchical Networks from a Deformation Mode Perspective Nanomaterials CNT network molecular dynamics simulation mechanical performance |
| title | Understanding the Mechanism of the Structure-Dependent Mechanical Performance of Carbon-Nanotube-Based Hierarchical Networks from a Deformation Mode Perspective |
| title_full | Understanding the Mechanism of the Structure-Dependent Mechanical Performance of Carbon-Nanotube-Based Hierarchical Networks from a Deformation Mode Perspective |
| title_fullStr | Understanding the Mechanism of the Structure-Dependent Mechanical Performance of Carbon-Nanotube-Based Hierarchical Networks from a Deformation Mode Perspective |
| title_full_unstemmed | Understanding the Mechanism of the Structure-Dependent Mechanical Performance of Carbon-Nanotube-Based Hierarchical Networks from a Deformation Mode Perspective |
| title_short | Understanding the Mechanism of the Structure-Dependent Mechanical Performance of Carbon-Nanotube-Based Hierarchical Networks from a Deformation Mode Perspective |
| title_sort | understanding the mechanism of the structure dependent mechanical performance of carbon nanotube based hierarchical networks from a deformation mode perspective |
| topic | CNT network molecular dynamics simulation mechanical performance |
| url | https://www.mdpi.com/2079-4991/13/24/3119 |
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