Surface modification of single-walled carbon nanotubes with polyethylene via in situ ziegler-natta polymerization
Surface modification of single-walled carbon nanotubes with polyethylene via in situ ziegler-natta polymerization
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DOI：
10.1002/app.20306
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发表时间：
2004-06
影响因子：
3
通讯作者：
X. Tong;Chang Liu;Hui‐Ming Cheng;Haichao Zhao;Feng Yang;Xuequan Zhang
中科院分区：
文献类型：
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作者：
X. Tong;Chang Liu;Hui‐Ming Cheng;Haichao Zhao;Feng Yang;Xuequan Zhang
采用Ziegler-Natta原位聚合法制备了聚乙烯（PE），并对单壁碳纳米管（SWNTs）进行了表面改性。由于催化剂在单壁碳纳米管表面进行了预处理，乙烯有望在那里扩散。扫描电子显微镜图像和溶解度测量表明，单壁碳纳米管的表面覆盖有PE层，和交联可能已经形成之间的单壁碳纳米管和PE。当用PE层覆盖的单壁碳纳米管与商业化的PE通过熔融共混混合时，所得复合材料具有比来自没有PE层的单壁碳纳米管的复合材料更好的机械性能。改性后的SWNT/PE复合材料的屈服强度、拉伸强度和模量、断裂应变和断裂能比未改性的SWNT/PE复合材料分别提高了25%、15.2%、25.4%、21%和38%。(C)2004 Wiley Periodicals，Inc.
Single-walled carbon nanotubes (SWNTs) were modified with polyethylene (PE) prepared by in situ Ziegler-Natta polymerization. Because of the catalyst pre-treated on the surface of the SWNTs, the ethylene was expected to polymerize there. Scanning electron microscopy images and solubility measurements showed that the surface of the SWNTs was covered with a PE layer, and a crosslink may have formed between the SWNTs and PE. When the SWNTs covered with a PE layer were mixed with commercialized PE by melt blending, the resulting composite had better mechanical properties than the composite from the SWNTs without a PE layer. The yield strength, the tensile strength and modulus, the strain at break, and the fracture energy of the modified-SWNT/PE composites were improved by 25, 15.2, 25.4, 21, and 38% in comparison with those of the raw-SWNT/PE composites. (C) 2004 Wiley Periodicals, Inc.