Tunable single-walled carbon nanotube microstructure in the liquid and solid states using poly(acrylic acid)
Tunable single-walled carbon nanotube microstructure in the liquid and solid states using poly(acrylic acid)
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DOI：
10.1021/nl052486t
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发表时间：
2006-05-01
期刊：
影响因子：
10.8
通讯作者：
Kim, YS
中科院分区：
文献类型：
--
作者：
Grunlan, JC;Liu, L;Kim, YS
聚（丙烯酸）示出控制单壁碳纳米管在水性混合物中的分散水平和在固体复合材料中的分散状态。在低pH下，含有0.1重量% SWNT的PAA稳定的悬浮液具有水状粘度，但该混合物随着pH升高而变稠。当pH再次降低时，这种行为被逆转。改变pH值的变化之间的聚集和剥离状态的单壁碳纳米管的微观结构，证明了电子显微镜和电导率测量。
Poly(acrylic acid) is shown to control the level of SWNT dispersion in aqueous mixtures and the state of dispersion in a solid composite. At low pH, PAA-stabilized suspensions containing 0.1 wt % SWNT have a waterlike viscosity, but this mixture thickens as the pH is raised. This behavior is reversed when pH is again lowered. Changing pH varies the SWNT microstructure between aggregated and well-exfoliated states, as evidenced by electron microscopy and electrical conductivity measurements.