Weak polyelectrolyte control of carbon nanotube dispersion in water |
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Authors: | Grunlan Jaime C Liu Lei Regev Oren |
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Institution: | Department of Mechanical Engineering, Texas A&M University, College Station, TX, USA. jgrunlan@tamu.edu |
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Abstract: | The dispersion of nanotubes by pH-responsive polymers (i.e., weak polyelectrolytes) enables the macroscopic properties of aqueous suspensions to be tuned. Microstructural changes were achieved as a function of pH in aqueous suspensions containing single-walled carbon nanotubes and imaged by cryogenic-TEM. Clear evidence of pH-sensitive nanotube dispersion is shown. We expect that many useful properties of these nanotube-polymer systems could be sensitive to microstructure, making this technique important for aqueous processing of carbon nanotubes and macroscopic tailoring of solid polymer nanocomposite behavior. |
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