Multiwall Nanotubes Can Be Stronger than Single Wall Nanotubes and Implications for Nanocomposite Design

被引:77
作者
Byrne, E. M. [1 ,3 ,4 ]
McCarthy, M. A. [1 ,3 ,4 ,5 ]
Xia, Z. [2 ]
Curtin, W. A. [3 ]
机构
[1] Univ Limerick, Dept Mech & Aeronaut Engn, Limerick, Ireland
[2] Univ Akron, Dept Mech Engn, Akron, OH 44325 USA
[3] Brown Univ, Div Engn, Providence, RI 02912 USA
[4] Univ Limerick, Composites Res Ctr, Limerick, Ireland
[5] Univ Limerick, Mat & Surface Sci Inst, Limerick, Ireland
关键词
CARBON NANOTUBES; MECHANICAL-PROPERTIES; MOLECULAR-DYNAMICS; STRENGTH; DEFECTS; REINFORCEMENT; MAGNESIUM; FRACTURE; BUNDLES; DAMAGE;
D O I
10.1103/PhysRevLett.103.045502
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Molecular dynamics modeling shows that multiwall carbon nanotubes (MWCNTs) with sp(3) interwall bonding have strengths exceeding those of single-wall carbon nanotubes (SWCNTs) containing the same size initial intrawall defect, and are far less sensitive to defect size. Thus, although processing methods used to increase interwall coupling also create intrawall defects, analyses here show that the strengthening effects and enhanced load transfer compensate for the creation of defects and make MWCNTs with interwall bonding preferable to SWCNTs as mechanical reinforcements in composites. These results are consistent with new experimental data and suggest a new design methodology for CNT-based composites.
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页数:4
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