结合聚合物与自燃侧链连接器用于碳纳米管分散
1Department of Chemistry & Chemical Biology and the Brockhouse Institute for Materials Research, McMaster University, 1280 Main St. W., Hamilton, ON, L8S 4M1, Canada.
Small (Weinheim an der Bergstrasse, Germany)
|March 18, 2024
概括
研究人员开发了一种新的聚合物,以提高单壁碳纳米管 (SWNT) 的溶解度和纯度. 这种方法在先进的电子应用中显著提高了SWNT导电性.
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 (SWNTs) 为电子提供了高性能,但受到杂质 (金属与半导体) 和溶解性差的限制.
- 现有的合聚合物改善SWNT分散,但它们的侧链对导电性产生负面影响.
- 需要方法来提高SWNT的纯度和导电性,而不会损害它们的内在特性.
研究的目的:
- 开发一种具有自焚性侧链的新型合聚合物,用于选择性SWNT分散和增强导电性.
- 展示一种简单的后加工方法,用于在SWNT薄膜形成后去除聚合物侧链.
- 为了研究侧链裂变对SWNT薄膜电气性能的影响.
主要方法:
- 一种具有自燃链的聚合物 (poly ((fluorene-co-phenylene) 聚合物的合成,其侧链中具有自我燃烧的链接器,并受到乙烯组的保护.
- 使用聚合聚合物在四基 (THF) 中通过超声波分散SWNTs以形成缩溶液.
- 制备聚合物-SWNT薄膜,然后用四-n-丁化 (TBAF) 处理,以触发侧链的裂变和去除.
主要成果:
- 聚合物有效分散SWNT,使缩分散和薄膜形成.
- 使用TBAF的治疗成功地切断了自燃侧链,释放了易挥发的副产品 (CO2和二醇),可以通过洗轻松清除.
- 电气表征显示,在TBAF治疗后,导电率显著增加,约为60倍.
结论:
- 一种具有可切割侧链的新型聚合物为制备高纯度可溶性SWNT提供了有效的策略.
- 开发的方法提供了一个简单而有效的途径,可以显著提高基于SWNT的材料的导电性.
- 这种方法通过克服当前的纯度和处理限制,为制造高性能SWNT电子设备开辟了新的途径.
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