聚合物结构和溶剂对单壁碳纳米管的选择性分散的影响
Jeong-Yuan Hwang1, Adrian Nish, James Doig
1Clarendon Laboratory, Parks Road, Oxford University OX1 3PU, UK.
Journal of the American Chemical Society
|February 26, 2008
概括
选择合适的芳香聚合物和有机溶剂是分散单壁碳纳米管的关键. 具有多烯的刚性聚合物对特定的纳米管类型具有很高的选择性,可以更好地制备溶液.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 聚合物化学 聚合物化学
背景情况:
- 单壁碳纳米管 (SWCNTs) 具有独特的电子和机械性能.
- 对SWCNT的有效分散对于它们在各种应用中集成至关重要.
- 芳香聚合物和有机溶剂被探索为SWCNTs的分散剂.
研究的目的:
- 研究聚合物结构和溶剂选择对SWCNT分散的影响.
- 为了实现高选择性分散特定的SWCNT类型基于直径和角.
- 了解聚合物灵活性,溶剂特性和SWCNT溶解之间的关系.
主要方法:
- 使用各种芳香聚合物-溶剂组合制备SWCNT溶液.
- 包括光学吸收,光发光激发映射,计算机建模和电子显微镜在内的表征技术.
- 对SWCNT分散质量,选择性和聚合状态的分析.
主要成果:
- 聚合物结构和溶剂都显著影响SWCNT分散.
- 在烯中的刚性聚合物 (PFO-BT,PFO) 对特定的SWCNT直径和角具有很高的选择性.
- 灵活的聚合物增强了整体SWCNT溶解度,但降低了选择性.
- 形式增加了溶解,但导致纳米管捆绑和光发光灭.
结论:
- 定制聚合物溶剂系统可以控制SWCNT的分散和选择性隔离.
- 在特定溶剂中的刚性聚合物是高选择性SWCNT分离的最佳选择.
- 溶剂选择极大地影响纳米管聚合和光学特性,影响潜在的应用.
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