Processable 3-nm thick graphene platelets of high electrical conductivity and their epoxy composites
文献类型：期刊论文
| 作者 | Jin, J (靳健)
|
| 刊名 | NANOTECHNOLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 25期号:12 |
| 关键词 | composites graphene epoxy electrical conductivity fracture mechanism |
| 通讯作者 | Meng, QS (Meng, Qingshi) |
| 英文摘要 | Graphene platelets (GnPs) are a class of novel 2D nanomaterials owing to their very small thickness (similar to 3 nm), high mechanical strength and electric conductivity (1460 S cm(-1)), and good compatibility with most polymers as well as cost-effectiveness. In this paper we present a low-cost processing technique for producing modified GnPs and an investigation of the electrical and mechanical properties of the resulting composites. After dispersing GnPs in solvent N-methyl-2-pyrrolidone, a long-chain surfactant (Jeffamine D 2000, denoted J2000) was added to covalently modify GnPs, yielding J2000-GnPs. By adjusting the ratio of GnPs to the solvent, the modified GnPs show different average thickness and thus electrical conductivity ranging from 694 to 1200 S cm(-1). To promote the exfoliation and dispersion of J2000-GnPs in a polymeric matrix, they were dispersed in the solvent again and further modified using diglycidyl ether of bisphenol A (DGEBA) producing m-GnPs, which were then compounded with an epoxy resin for the development of epoxy/m-GnP composites. A percolation threshold of electrical volume resistivity for the resulting composites was observed at 0.31 vol%. It was found that epoxy/m-GnP composites demonstrated far better mechanical properties than those of unmodified GnPs of the same volume fraction. For example, m-GnPs at 0.25 vol% increased the fracture energy release rate G(1c) from 0.204 +/- 0.03 to 1: 422 +/- 0: 24 kJ m(-2), while the same fraction of unmodified GnPs increased G(1c) to 1: 01 +/- 0: 24 kJ m(-2). The interface modification also enhanced the glass transition temperature of neat epoxy from 58.9 to 73.8 degrees C. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000332669300020 |
| 公开日期 | 2015-02-03 |
| 源URL | [http://ir.sinano.ac.cn/handle/332007/1776]  |
| 专题 | 苏州纳米技术与纳米仿生研究所_纳米仿生研究部_靳健团队 |
| 推荐引用方式 GB/T 7714 | Jin, J . Processable 3-nm thick graphene platelets of high electrical conductivity and their epoxy composites[J]. NANOTECHNOLOGY,2014,25(12). |
| APA | Jin, J .(2014).Processable 3-nm thick graphene platelets of high electrical conductivity and their epoxy composites.NANOTECHNOLOGY,25(12). |
| MLA | Jin, J ."Processable 3-nm thick graphene platelets of high electrical conductivity and their epoxy composites".NANOTECHNOLOGY 25.12(2014). |
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