采用微型双螺杆挤出共混和熔融纺丝法制备了聚苯乙烯／多壁碳纳米管（PS／MWNTs）复合丝。通过添加改性剂可以提高复合材料的纺丝最大拉伸比。光学显微镜和扫描电镜观察发现，当MWNTs含量较小（〈2％）时，MWNTs在基体中的分散比较均匀。随着MWNTs含量的增加，团聚增多，且大多数MWNTs沿纤维轴向取向排列。当MWNTs含量较小时，添加一定量改性荆可以提高复合丝的拉伸强度及尺寸稳定性。电性能结果表明，复合丝的导电渗流阈值出现在2％～5％之间。复合材料的流变渗流阈值与导电渗流阈值具有一致性。
Polystyrene (PS)/multiwalled carbon nanotube (MWNTs) composite fibers were prepared via micro melt extrusion and melt spinning. Modifier was used to increase the draw ratios of the composite. Optical microscope and scanning electron microscopy results show that MWNTs disperse homogeneously in the matrix when its content is lower than 2 %. Higher nanotube loading resulted in the larger aggregation and bad dispersion, and most of MWNTs orientated along the fiber axis. The tensile strength and dimensional stability of the composite fibers are improved with a comparatively lower MWNTs content. The electrical percolation threshold occurs when the MWNTs content is between 2% and 5%. The dynamic rheologieal percolation threshold of the composite is corresponding to the electrical percolation threshold.
参考文献
| [1] | 欧育湘,赵毅,许冬梅.聚合物/碳纳米管纳米复合材料性能研究进展[J].高分子材料科学与工程,2011(03):167-170. |
| [2] | Haggenmueller R.;Rinzler AG.;Fischer JE.;Winey KI.;Gommans HH. .Aligned single-wall carbon nanotubes in composites by melt processing methods[J].Chemical Physics Letters,2000(3-4):219-225. |
| [3] | R. Andrews;D. Jacques;A. M. Rao .Nanotube composite carbon fibers[J].Applied Physics Letters,1999(9):1329-1331. |
| [4] | 王青,戴剑锋,李维学,魏智强,姜金龙.单壁纳米碳管/聚酰亚胺复合材料的制备及导电特性[J].高分子材料科学与工程,2009(07):159-161,165. |
| [5] | T.-E.Chang;A.Kisliuk;S.M.Rhodes .Conductivity and mechanical properties of well-dispersed single-wall carbon nanotube/polystyrene composite[J].Polymer: The International Journal for the Science and Technology of Polymers,2006(22):7740-7746. |
| [6] | Haines MG;Sanford TWL;Smirnov VP .Wire-array z-pinch: a powerful x-ray source for ICF[J].Plasma physics and controlled fusion,2005(0):B1-B11. |
| [7] | 杨波,周秀文,何伟,刘旭东,余斌,吴卫东.Z箍缩靶用聚合物丝的弛豫特性[J].强激光与粒子束,2009(12):1824-1828. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%