期刊
POLYMER
卷 68, 期 -, 页码 25-34出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2015.04.080
关键词
Carbon nanofibers; Magnetic field alignment; Epoxy nanocomposites
资金
- Australian Research Council [DP140100778]
- Engineering and Physical Sciences Research Council [EP/K016792/1] Funding Source: researchfish
- EPSRC [EP/K016792/1] Funding Source: UKRI
Novel magnetite-carbon nanofiber hybrids (denoted by Fe3O4@CNFs) have been developed by coating carbon nanofibers (CNFs) with magnetite nanoparticles in order to align CNFs in epoxy using a relatively weak magnetic field. Experimental results have shown that a weak magnetic field (similar to 50 mT) can align these newly-developed nanofiber hybrids to form a chain-like structure in the epoxy resin. Upon curing, the epoxy nanocomposites containing the aligned Fe3O4@CNFs show (i) greatly improved electrical conductivity in the alignment direction and (ii) significantly higher fracture toughness when the Fe3O4@CNFs are aligned normal to the crack surface, compared to the nanocomposites containing randomly-oriented Fe3O4@CNFs. The mechanisms underpinning the significant improvements in the fracture toughness have been identified, including interfacial debonding, pull-out, crack bridging and rupture of the Fe3O4@CNFs, and plastic void growth in the polymer matrix. (C) 2015 The Authors. Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据