可溶性超短单壁碳纳米管
Zheyi Chen1, Kazufumi Kobashi, Urs Rauwald
1Smalley Institute for Nanoscale Science and Technology, Carbon Nanotechnology Laboratory, Department of Chemistry, Rice University, Houston, Texas 77005, USA.
Journal of the American Chemical Society
|August 10, 2006
概括
研究人员开发了一种可扩展的方法来创建可溶性,超短单壁碳纳米管 (US-SWNTs). 这些功能化的US-SWNT表现出更好的溶解性,使先进的材料应用能够在不影响加工能力的情况下实现.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 化学工程是化学工程的重要组成部分.
背景情况:
- 单壁碳纳米管 (SWNTs) 是具有特殊性质的有希望的纳米材料.
- 在SWNT中实现溶解性和可加工性对于其实际应用至关重要.
- 现有的SWNT功能化的方法往往面临着可扩展性和维护所需属性的挑战.
研究的目的:
- 开发一种可扩展和高效的方法来生产可溶性,超短单壁碳纳米管 (US-SWNTs).
- 功能化SWNT,以提高它们在各种溶剂,包括水中的溶解性.
- 为了使SWNT在高性能复合材料和材料中使用,而不妨碍可加工性.
主要方法:
- 一个可扩展的工艺,利用 (100% H2SO4 含过量的 SO3) 来在绳索内插入和分离单个 SWNT.
- 使用硫酸和酸混合物同时切割和碳氧化SWNT.
- 由此产生的超短SWNTs (US-SWNTs) 的长度,溶解度和功能化特征.
主要成果:
- 通过可扩展的方法成功制备了可溶性,超短 (长度<60 nm),碳氧化SWNT.
- 在有机溶剂,超酸和水中,美国SWNTs的溶解率达到了大约2%的重量.
- 证明了功能化过程有效地缩短和溶解SWNTs.
结论:
- 开发的可扩展过程提供了可溶性US-SWNTs的访问.
- 这些US-SWNTs的增强溶解度和可控长度是先进材料开发的关键.
- 这一突破促进了创建高性能复合材料,混合物和共聚合物,提高了可加工性.
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