Synthesis, structure and properties of carbon nanotube/poly(p-phenylene benzobisoxazole) composite fibres
Synthesis, structure and properties of carbon nanotube/poly(p-phenylene benzobisoxazole) composite fibres
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DOI：
10.1002/pi.1998
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发表时间：
2006-04
影响因子：
3.2
通讯作者：
Jinhuan Li;Xiangqun Chen;Xia Li;H. Cao;Hongyang Yu;Yudong Huang
中科院分区：
文献类型：
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作者：
Jinhuan Li;Xiangqun Chen;Xia Li;H. Cao;Hongyang Yu;Yudong Huang
采用原位聚合法和干-湿纺法制备了碳纳米管/聚对苯撑苯并二恶唑（CNT/PBO）复合纤维。研究了CNT/PBO纤维的结构和性能。FTIR和粘度测试表明，碳纳米管表面的官能团参与了聚合反应，并影响了复合材料的化学结构和分子量。通过控制碳纳米管的加入量和加入时间，可以得到高分子量的碳纳米管/聚丁二烯复合材料。与相同条件下制备的不含CNT的PBO纤维相比，CNT（2wt%）/PBO纤维的耐热性更高，拉伸强度也提高了20- 50%。WAXD和SEM测试结果表明，CNT（2wt%）/PBO纤维的取向度小于PBO纤维。这两种纤维的断裂表面也不同。通过TEM检查CNT（2重量%）/PBO纤维中的CNT分散体。在此基础上，提出了碳纳米管与PBO之间相互作用的模型。版权所有© 2006化学工业协会
Carbon nanotube/poly(p-phenylene benzobisoxazole) (CNT/PBO) composite fibres were prepared by in situ polymerization and dry-jet wet spinning. The structure and properties of the CNT/PBO fibres were investigated. FTIR and viscosity measurements showed that the functional groups on the CNT surface took part in the polymerization and affected the chemical structure and molecular weight of the composite. CNT/PBO composites with high molecular weight could be obtained by controlling the amount and addition time of CNTs. Compared with PBO fibres containing no CNTs prepared under the same conditions, the thermal resistance of the CNT (2 wt%)/PBO fibres was higher and the tensile strength was also improved by 20–50%. WAXD and SEM measurements indicated that the orientation degree of the CNT (2 wt%)/PBO fibres was smaller than that of PBO fibres. The fracture surfaces of these two fibres were also different. CNT dispersion in the CNT (2 wt%)/PBO fibres was examined by TEM. A model of the interactions between CNTs and PBO is proposed, based on these results. Copyright © 2006 Society of Chemical Industry