首页> 中文期刊> 《新型炭材料》 >碳纳米管对环氧树脂基纳米复合材料的力学和电学性能影响

碳纳米管对环氧树脂基纳米复合材料的力学和电学性能影响

         

摘要

以碳纳米管( MWCNT)为添加剂,制备出碳纳米管/环氧树脂复合材料,并探讨MWCNT质量分数对其力学和电学性能的影响。结果表明,当MWCNT含量分别为0.1%和0.25%时,该复合材料的拉伸强度和弯曲模量达到最大值。随着MWCNT含量的增加,拉伸模量增加和应变损坏率降低,这表明复合材料由塑性变形到脆性变形演变。当MWCNT含量为0.05%时样品弯曲强度最高;当MWCNT含量为0.5%时,样品出现电渗流阈值。 MWCNT在环氧树脂基体中的良好分散对提高复合材料力学性能起重要作用。分散不均的MWCNT易团聚,会引起早期失效和电学性能降低。%The effects of multi¯wall carbon nanotube ( MWCNT) content on the mechanical and electrical properties of MWCNT/epoxy composites were investigated. Results indicate that both tensile strength and flexural modulus exhibit maxima at MWCNT con¯ tents of 0.1% and 0. 25% (mass fraction), respectively. The tensile modulus increases and the strain to failuredecreases with MWCNT content, indicating a transition from plastic to brittle failure with increasing MWCNT content. The flexural strength of a sample with a MWCNT content of 0. 05% is the highest. The electrical percolation threshold of the composite is found to occur at a 0. 5% MWCNT addition. A good dispersion of MWCNTs in epoxy is important to improve the mechanical properties of the com¯ posites. A non¯uniform dispersion leads to agglomeration of MWCNTs, which causes an early¯stage failure under loading. The elec¯ trical properties of the composites are less affected by the presence of agglomerates.

著录项

  • 来源
    《新型炭材料》 |2014年第6期|419-425|共7页
  • 作者单位

    Materials Science and Engineering Department, Faculty of Engineering, Tarbiat Modares University, Jalal Ale Ahmad Highway 14115_111, Tehran, Iran;

    Materials Science and Engineering Department, Faculty of Engineering, Tarbiat Modares University, Jalal Ale Ahmad Highway 14115_111, Tehran, Iran;

    Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, Mechanical Engineering Department, Iran University of Science and Technology 16846_13114, Tehran, Iran;

    Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, Mechanical Engineering Department, Iran University of Science and Technology 16846_13114, Tehran, Iran;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 非金属复合材料;
  • 关键词

    多壁碳纳米管; 力学和电学性能; 纳米复合材料; 拉伸性能; 硬度; 弯曲性能;

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