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 multiˉwall 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 conˉ 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 comˉ posites. A nonˉuniform dispersion leads to agglomeration of MWCNTs, which causes an earlyˉstage failure under loading. The elecˉ trical properties of the composites are less affected by the presence of agglomerates.
参考文献
| [1] | Mohammed H. Al-Saleh;Uttandaraman Sundararaj .Review of the mechanical properties of carbon nanofiber/polymer composites[J].Composites, Part A. Applied science and manufacturing,2011(12):2126-2142. |
| [2] | SRAVANI GULLAPALLI;MICHAEL S. WONG .Nanotechnology: A Guide to Nano-Objects[J].Chemical Engineering Progress,2011(5):28-32. |
| [3] | 嵇天浩,孙妹,韩鹏.半导体/石墨烯纳米复合材料的制备及其应用进展[J].新型炭材料,2013(06):401-407. |
| [4] | 李世胜,侯鹏翔,刘畅.超疏水叠杯状碳纳米管薄膜的制备[J].新型炭材料,2013(04):295-299. |
| [5] | Young Kuk Choi;Koh Ichi Sugimoto;Sung Moo Song .Mechanical and thermal properties of vapor-grown carbon nanofiber and polycarbonate composite sheets[J].Materials Letters,2005(27):3514-3520. |
| [6] | Young-Kuk Choi;Koh-ichi Sugimoto;Sung-Moo Song .Mechanical and physical properties of epoxy composites reinforced by vapor grown carbon nanofibers[J].Carbon: An International Journal Sponsored by the American Carbon Society,2005(10):2199-2208. |
| [7] | J. Sandler;M. S. P. Shaffer;T. Prasse;W. Bauhofer;K. Schulte;A. H. Windle .Development of a dispersion process for carbon nanotubes in an epoxy matrix and the resulting electrical properties[J].Polymer: The International Journal for the Science and Technology of Polymers,1999(21):5967-5971. |
| [8] | Zheng Yaping;Zhang Aibo;Chen Qinghua;Zhang Jiaoxia;Ning Rongchang .Functionalized effect on carbon nanotube/epoxy nano-composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):145-149. |
| [9] | Reinforcement efficiency of multi-walled carbon nanotube/epoxy nano composites[J].Composites science and technology,2010(7):1154. |
| [10] | Bauhofer W;Kovacs J .A review and analysis of electrical perˉ colation in carbon nanotube polymer composites[J].Composˉ ites Science and Technology,2009,69:1486-1498. |
| [11] | Behzad Shirkavand Hadavand;Kimya Mahdavi Javid;Mehrnaz Gharagozlou .Mechanical properties of multi-walled carbon nanotube/epoxy polysulfide nanocomposite[J].Materials & design,2013(Sep.):62-67. |
| [12] | Arun S;Maharana M;Kanagaraj S .Optimizing the processing conditions for the reinforcement of epoxy resin by multiwalled carbon nanotubes[J].Journal of Nanotechnology,2013,2013:1-10. |
| [13] | Zhiqiang Chen;Xiujuan J. Dai;Kevin Magniez .Improving the mechanical properties of epoxy using multiwalled carbon nanotubes functionalized by a novel plasma treatment[J].Composites, Part A. Applied science and manufacturing,2013(2):145-152. |
| [14] | Michael Russ;Sameer S. Rahatekar;Krzysztof Koziol;Benjamin Farmer;Hua-Xin Peng .Length-dependent electrical and thermal properties of carbon nanotube-loaded epoxy nanocomposites[J].Composites science and technology,2013(Jun.):42-47. |
| [15] | Shafi Ullah Khan;Jayaram R. Pothnis;Jang-Kyo Kim.Effects of carbon nanotube alignment on electrical and mechanical properties of epoxy nanocomposites[J].Composites, Part A. Applied science and manufacturing,2013:26-34. |
| [16] | Rafiee, M.A.;Rafiee, J.;Wang, Z.;Song, H.;Yu, Z.-Z.;Koratkar, N. .Enhanced mechanical properties of nanocomposites at low graphene content[J].ACS nano,2009(12):3884-3890. |
| [17] | Shin-Yi Yang;Wei-Ning Lin;Yuan-Li Huang .Synergetic effects of graphene platelets and carbon nanotubes on the mechanical and thermal properties of epoxy composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,2011(3):793-803. |
| [18] | Weikang Li;Anthony Dichiara;Jinbo Bai .Carbon nanotube-graphene nanoplatelet hybrids as high-performance multifunctional reinforcements in epoxy composites[J].Composites science and technology,2013(Jan.):221-227. |
| [19] | Martin-Gallego, M.;Bernal, M.M.;Hernandez, M.;Verdejo, R.;Lopez-Manchado, M.A. .Comparison of filler percolation and mechanical properties in graphene and carbon nanotubes filled epoxy nanocomposites[J].European Polymer Journal,2013(6):1347-1353. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%