以天然鳞片石墨为原料，通过 Hummers 法制备氧化石墨，微波热解剥离制备出少层数的石墨烯纳米片。以硅烷偶联剂 KH-560为改性剂，超声共混制备石墨烯纳米片/环氧树脂复合材料。采用 FT-IR和SEM分析样品的微观结构和形貌，测试其介电性能。结果表明，随着石墨烯纳米片添加量的增加，复合材料介电常数呈现先增大后减小的趋势，当石墨烯纳米片含量为0.3%(质量分数)时，介电常数达到最大；石墨烯纳米片对复合材料介电损耗的影响与之相反；偶联改性使复合材料的介电常数增大，介电损耗减小。
Graphene nanosheets (GNSs)with few-layer graphene have been prepared from natural flake graphite by oxidation intercalation and microwave expansion.Then GNSs was modified by silane coupling agent KH-560.GNSs/EP composites was finally prepared by the ultrasonic mixing method.The structure and morpholo-gy of the samples were characterized by FT-IR and SEM.The dielectric properties of the composite was tested by impedance analyzer.The results show that the permittivity increases with the rise of GNSs content to the maximum when GNSs content get to 0.3wt%,and then decreases.The effect of GNSs content on dielectric loss was the opposite.Modified GNSs/EP composite has a higher permittivity and lower dielectric loss compared with GNSs/EP composite.
参考文献
| [1] | 王德中.环氧树脂及其应用[M].北京:化学工业出版社,2002:1-5. |
| [2] | 陈祥宝.先进树脂基复合材料的发展和应用[J].航空材料学报,2003(z1):198-204. |
| [3] | 黄仁和,王力.纳米石墨薄片及聚合物/石墨纳米复合材料制备与功能特征研究[J].功能材料,2005(01):6-10,14. |
| [4] | Novoselov K S;Geim A K;Morozov S V et al.Electric field effect in atomically thin carbon films[J].SCIENCE,2004,306(5696):666-669. |
| [5] | Castro Neto, AH;Guinea, F;Peres, NMR;Novoselov, KS;Geim, AK .The electronic properties of graphene[J].Reviews of Modern Physics,2009(1):109-162. |
| [6] | Novoselov K S;Geim A K;Morozov S V et al.Two-di-mensional gas of massless dirac fermions in graphene[J].NATURE,2005,438:197-200. |
| [7] | Meyer J C;Geim A K;Katsnelson M I et al.The struc-ture of suspended graphene sheets[J].NATURE,2007,446:60-63. |
| [8] | Michael J.McAllister;Je-Luen Li;Douglas H.Adamson .Single Sheet Functionalized Graphene by Oxidation and Thermal Expansion of Graphite[J].Chemistry of Materials: A Publication of the American Chemistry Society,2007(18):4396-4404. |
| [9] | Im, H.;Kim, J.-M.;Kim, J. .Thermal and electrical conductivity of Al(OH) _3 covered graphene oxide nanosheet/epoxy composites[J].Journal of Materials Science,2012(3):1418-1426. |
| [10] | Jiwon Kim;Byung-seung Yim;Jong-min Kim;Jooheon Kim .The effects of functionalized graphene nanosheets on the thermal and mechanical properties of epoxy composites for anisotropic conductive adhesives (ACAs)[J].Microelectronics and reliability,2012(3):595-602. |
| [11] | Chatterjee S;Nafezarefi F;Tai N H .Size and synergy effects of nanofiller hybrids including graphene nano-platelets and carbon nanotubes in mechanical properties of epoxy composites[J].CARBON,2012,50:5380-5386. |
| [12] | Chatterjee, S.;Wang, J.W.;Kuo, W.S.;Tai, N.H.;Salzmann, C.;Li, W.L.;Hollertz, R.;Nüesch, F.A.;Chu, B.T.T..Mechanical reinforcement and thermal conductivity in expanded graphene nanoplatelets reinforced epoxy composites[J].Chemical Physics Letters,2012:6-10. |
| [13] | Romasanta L J;Hernández M A;López-Man Chado M A et al.Functionalised graphene sheets as effective high dielectric constant fillers[J].Nanoscale Research Let-ters,2011,6:508-513. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%