The effective interfacial shear strength of carbon nanotube fibers in an epoxy matrix characterized by a microdroplet test

被引:116
|
作者
Zu, Mei [1 ,2 ,3 ]
Li, Qingwen [4 ]
Zhu, Yuntian [5 ]
Dey, Moutushi [3 ]
Wang, Guojian [2 ]
Lu, Weibang [1 ,3 ]
Deitzel, Joseph M. [3 ]
Gillespie, John W., Jr. [3 ,6 ,7 ]
Byun, Joon-Hyung [8 ]
Chou, Tsu-Wei [1 ,3 ]
机构
[1] Univ Delaware, Dept Mech Engn, Newark, DE 19716 USA
[2] Tongji Univ, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China
[3] Univ Delaware, Ctr Composite Mat, Newark, DE 19716 USA
[4] Suzhou Inst Nanotech & Nanobion, Suzhou 215123, Peoples R China
[5] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA
[6] Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA
[7] Univ Delaware, Dept Civil & Environm Engn, Newark, DE 19716 USA
[8] Korean Inst Mat Sci, Composite Mat Grp, Chang Won 641773, South Korea
关键词
MECHANICAL-PROPERTIES; STIFFNESS;
D O I
10.1016/j.carbon.2011.10.047
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The tensile properties of continuous carbon nanotube (CNT) fibers spun from a CNT carpet consisting of mainly double- and triple-walled tubes, and their interfacial properties in an epoxy matrix, are investigated by single fiber tensile tests and microdroplet tests, respectively. The average CNT fiber strength, modulus and strain to failure are 1.2 +/- 0.3 GPa, 43.3 +/- 7.4 GPa and 2.7 +/- 0.5%, respectively. A detailed study of strength distribution of CNT fiber has been carried out. Statistical analysis shows that the CNT fiber strength is less scattered than those of MWCNTs as well as commercial carbon and glass fibers without surface treatment. The effective CNT fiber/epoxy interfacial shear strength is 14.4 MPa. Unlike traditional fiber-reinforced composites, the interfacial shear sliding occurs along the interface between regions with and without resin infiltration in the CNT fiber. Guidelines for microdroplet experiments are established through probability analysis of variables basic to specimen design. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1271 / 1279
页数:9
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