Abstract: Provided is a method for uniform dispersion of single-wall carbon nanotubes, comprising: (1) dispersing single-wall carbon nanotube powder in a low-boiling point alcohol or water or DMF, then placing into a UV bench for ultraviolet irradiation and oxidation; (2) after cleaning the carbon nanotubes in the UV bench, using a strong acid to carry out an oxidation reaction, then washing by centrifugation; (3) after cleaning with strong acid, subjecting the single-wall carbon nanotubes to ethanol or water ultrasonic dispersion 2-3 times, washing by centrifugation, then dissolving in low-boiling point alcohol or water or DMF solution to obtain a single-wall carbon nanotube dispersion. By means of the present method, the entire surface of a carbon nanotube is grafted with a functionalized group, achieving solubility of single-wall carbon nanotubes; further, high-performance carbon nanotube composite flexible transparent electrode materials can be prepared, which have high transmittance and low sheet resistance.

Abstract: Provided is a method for improving single-wall carbon nanotube dispersion, comprising the following steps: (1) using ultrasonic waves to disperse single-wall carbon nanotube powder in a lipid solvent, and allowing to stand for 2-3 days for swelling and centrifuging; (2) successively washing by centrifugation with low-boiling point alcohol solvent and water, then drying; (3) adding the dried single-wall carbon nanotubes to a strongly oxidative acid solution for oxidation, and centrifuging; (4) washing by centrifugation with water to a centrate of pH7, then dissolving the single-wall carbon nanotubes in water or alcohol solvent. Upon processing by the described method, recovery of single-wall carbon nanotubes is around 80% or higher, and the single-wall carbon nanotube solution is highly concentrated; the absorbance value of the carbon nanotube dispersion can be reduced to approximately 1600, and the invention can be used for preparation of flexible transparent electrode materials.

Abstract: A high-dispersion carbon nanotube composite conductive ink, consisting of modified carbon nanotubes, conductive polymeric material, and solvent; said modified carbon nanotubes being obtained from conventional carbon nanotubes that have been irradiated on a UV bench and then oxidized by a strong acid. Carbon nanotubes obtained via this process do not require, when preparing conductive composite ink, the addition of a surfactant to increase the dispersibility of the ink, such that the conductive layer obtained therefrom has good conductive properties, optical transmittance within the visible light range, and flexibility. The conductive properties of this flexible carbon nanotube polymeric transparent conductive film are world class, and the invention has good prospects for application.

Abstract: Provided is a method for improving single-wall carbon nanotube dispersion, comprising the following steps: (1) using ultrasonic waves to disperse single-wall carbon nanotube powder in a lipid solvent, and allowing to stand for 2-3 days for swelling and centrifuging; (2) successively washing by centrifugation with low-boiling point alcohol solvent and water, then drying; (3) adding the dried single-wall carbon nanotubes to a strongly oxidative acid solution for oxidation, and centrifuging; (4) washing by centrifugation with water to a centrate of pH7, then dissolving the single-wall carbon nanotubes in water or alcohol solvent. Upon processing by the described method, recovery of single-wall carbon nanotubes is around 80% or higher, and the single-wall carbon nanotube solution is highly concentrated; the absorbance value of the carbon nanotube dispersion can be reduced to approximately 1600, and the invention can be used for preparation of flexible transparent electrode materials.

Abstract: Provided is a method for uniform dispersion of single-wall carbon nanotubes, comprising: (1) dispersing single-wall carbon nanotube powder in a low-boiling point alcohol or water or DMF, then placing into a UV bench for ultraviolet irradiation and oxidation; (2) after cleaning the carbon nanotubes in the UV bench, using a strong acid to carry out an oxidation reaction, then washing by centrifugation; (3) after cleaning with strong acid, subjecting the single-wall carbon nanotubes to ethanol or water ultrasonic dispersion 2-3 times, washing by centrifugation, then dissolving in low-boiling point alcohol or water or DMF solution to obtain a single-wall carbon nanotube dispersion. By means of the present method, the entire surface of a carbon nanotube is grafted with a functionalized group, achieving solubility of single-wall carbon nanotubes; further, high-performance carbon nanotube composite flexible transparent electrode materials can be prepared, which have high transmittance and low sheet resistance.