Optimization Conditions for Single-Walled Carbon Nanotubes Dispersion

• 作者: Bing Yang Dianqing Li Huifang Gao Lingling Ren Yunhua Shi
• 来源期刊: 表面工程材料与先进技术期刊(英文)
• 学科: 化学
• 关键词: SINGLE-WALLED Carbon NANOTUBES (SWCNTs) SODIUM Dodecyl Sulphate (SDS) UV-vis-NIR Absorption SPECTRA Concentration Sonication Temperature Sonication Time
• 年，卷（期）: bmgcclyxjjsqkyw_2013,（1）
• 页码范围: 6-12
• 页数: 7页
• 分类号: O6

摘要

The sonication-driven dispersion of single-walled carbon nanotubes (SWCNTs) in aqueous surfactant solution has been monitored by UV-vis-NIR spectroscopy and scanning electron microscopy. Dispersion of SWCNTs experiments reveal that the maximum concentration of dispersed SWCNTs corresponds to the maximum UV-vis-NIR absorbance of the solution. With higher surfactant concentration the dispersion rate of SWCNTs increases and low temperature sonication is required to achieve maximum dispersion. Dispersion of higher SWCNT concentrations requires longer sonication time. For effective dispersion the optimal concentration of surfactant is 1.5 wt%, the concentration of SWCNTs that can be homogeneously dispersed in aqueous solution is about 0.4 mg/ml.