使用无毒,低碳足迹分散剂解SWCNT
Carlos Salas-Bringas1, Maria Gastony2
1Borregaard ASA, Hjalmar Wessels vei 6, 1701 Sarpsborg, Norway.
Polymers
|November 27, 2025
概括
一种新的环保方法使用Vanisperse® LI在水中解单壁碳纳米管 (SWCNTs). 这种可持续的方法可以产生稳定的SWCNT分散,无需使用强化学品或超离心.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 绿色化学 绿色化学
背景情况:
- 单壁碳纳米管 (SWCNTs) 是具有独特性质的有希望的纳米材料.
- 传统的SWCNT分散方法通常依赖于有毒溶剂,如N-甲基-2-pyrrolidone (NMP) 或能源密集型工艺.
- 开发可持续和高效的解锁策略对于推进SWCNT应用至关重要.
研究的目的:
- 为解锁SWCNTs制定一个完全水性,无NMP的战略.
- 使用一种可再生的分散剂,Vanisperse® LI,用于SWCNT分散.
- 优化分散剂覆盖范围,并评估由此产生的SWCNT悬浮物的稳定性和形态.
主要方法:
- 使用Vanisperse® LI在2 mg mL-1.1的水中分散SWCNTs.
- 在0.3 W mL-1.1的探头超声波处理.
- 使用振荡性脊髓学和扫描电子显微镜 (SEM) 评估分散性质.
- 在10,000×g的两个阶段离心,用于净化和稳定.
主要成果:
- 复杂粘度显示了暂时的最大值,表明网络形成,随后是解锁.
- 最佳的分散剂覆盖率 (~1.5 mg m-2) 降低了粘度;过量服用导致过桥.
- 通过离心实现了稳定的SWCNT分散,避免了超离心.
- SEM证实了显著的分解成薄,类似纤维的结构.
结论:
- 范尼斯珀斯® LI为水性SWCNT解提供了一种有效的,可持续的替代方案.
- 开发的方法产生了适合先进材料的稳定,解束的SWCNT分散.
- 与传统方法相比,这种方法提供了较低的碳足迹,促进了更绿色的纳米技术.
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